JP2715061B2 - Waste liquid treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste liquid treatment apparatus.

[0002]

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 there are many types of cleaning liquids.

[0003] In the case of cleaning an object with the aqueous cleaning liquid, when the equipment is provided as a waste liquid treatment by using an in-house equipment, the aqueous cleaning liquid is collected 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.

[0004]

In the case of self-treatment, even if a certain water-based cleaning solution is used to clean the same type of stains, the equipment using a semi-permeable membrane 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.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a waste liquid treating apparatus capable of treating waste liquid after washing various objects using various aqueous cleaning liquids with one facility.

[0006]

Means for Solving the Problems A first invention of the present invention is:
Furnace body using waste as fuel, combustion device for burning fuel in furnace body, smoke exhaust means provided in furnace body, atomizing means for spraying waste liquid into furnace, and supplying waste liquid to atomizing means in waste water treatment apparatus having a waste feeding means for feeding, the temperature of the furnace body
Temperature detecting means for detecting the temperature,
Detects the temperature inside the furnace, and any of the temperature detecting means
When the set maximum temperature is indicated, the amount of waste liquid sprayed into the furnace
Increase to a large value, and any one of the temperature detection means detects each temperature
If the minimum temperature determined for each means is
A waste liquid treatment apparatus comprising control means for reducing the amount of waste liquid sprayed .

[0007] In a second aspect of the present invention, the temperature in the furnace is reduced.
The flow rate of the waste liquid to the minimum
However, the maximum value determined for each of the temperature detecting means
Temperature detection of a predetermined combustion failure limit temperature below the low temperature
Control means for stopping the supply of waste liquid when any of the discharge means indicates.
The waste liquid treatment apparatus according to the first invention , comprising a step.

The third invention of the present invention has a waste liquid storage tank.
For supplying waste liquid from a waste liquid generation source to a waste liquid storage tank
And a liquid for detecting the lower limit liquid level and the upper limit liquid level of the waste liquid storage tank.
Equipped with position detection means, and when the lower limit liquid level is detected, it is discarded to atomization means.
Whether the waste liquid feeding of the waste liquid feeding means for sending the liquid should be the minimum flow rate,
Alternatively, stop and detect the upper limit liquid level to reach the combustible limit.
To increase the supply of waste liquid to the atomizing means,
Characterized by maintaining the liquid level between the upper and lower liquid levels as much as possible.
1 is a waste liquid treatment apparatus according to the invention.

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a flow sheet according to Embodiment 1 of the present invention. A furnace 1 is provided with a grate 2, and the furnace 1 has a chimney 3. Although not shown, the fuel 4 is supplied to the grate 2
It has a stoker for feeding upward, an ignition burner for igniting the fuel 4, and an air supply device for feeding combustion air onto the grate 2 through the air distribution chamber 1a below the grate 2.

In the above description, the fuel 4 burned on the grate 2 is a waste such as a waste material, but may be a waste tire. Further, as another combustion device, a device which sprays waste oil such as lubricating oil under pressure and burns it may be used.

The waste liquid having been washed with the aqueous cleaning liquid is supplied from a waste liquid transport pipe 6 to a tank 5 provided as a waste liquid storage tank via, for example, a ball tap 7. The valve closing position of the ball tap 7 is set to the over liquid level OH exceeding the upper limit liquid level H of the waste liquid in the tank 5. In order to stop the flow of the waste liquid into the tank 5 at the over liquid level OH, an over liquid level probe 8 for detecting the over liquid level OH is provided, and a solenoid valve is interposed in the waste liquid transport pipe 6 so that the over liquid level probe May close the solenoid valve upon detecting the over liquid level OH. In any case, the over liquid level probe 8 is provided, and the signal detected by the over liquid level probe 8 is sent to the control device 13, and the control device 13 transmits the alarm lamp and the buzzer 1.
Activate 0.

The above-mentioned over liquid level probe 8, the upper liquid level probe 9 for detecting the upper liquid level H, and the lower liquid level probe 11 for detecting the lower liquid level L are provided in one level switch 12, and each liquid level is measured. The detected signal is sent to the control device 13.

The suction pipe 15 of the pump 14 is immersed in the tank 5 at the lower end below the lower limit water level L, and the discharge pipe 16 of the pump 14 is directed to a flame generated when the fuel 4 burns in the furnace body 1. The nozzle 17 sprays waste liquid. The discharge pipe 16 has a branch 18 according to the flow of the waste liquid.
The flow control valve 19 and the strainer 22 are interposed downstream of the branch portion. The strainer 22 may be provided in the nozzle 17. A waste liquid return pipe 23 is provided from the branch portion 18 to the tank 5, and a return flow regulating valve 24 is interposed in the waste liquid return pipe 23.

In the above description, the flow control valve 19 is, for example, a motor valve capable of adjusting the valve opening from fully open to fully closed by a step motor, a solenoid valve capable of duty control, and a compressed air operated indexing mechanism. For example, an air valve or the like that can be adjusted from fully open to fully closed is mentioned.

The pump 14 is driven by a motor 27, and the motor 27 is supplied with electric power from a commercial power supply via a switch 28. The opening and closing of the switch 28 is controlled by the control device 13. The motor 27 is, for example, a constant speed induction motor,
In the present example, since the waste liquid return pipe 23 having the reflux flow rate adjusting valve 24 is provided, the pump 14 can be a positive displacement pump or a non-positive pump that cannot perform the closing operation.

A plurality of temperature sensors 25a, 25b, 25c for detecting the temperature inside the furnace body 1, for example, thermistors are provided on the outer surface of the furnace wall. It has become. The control device 13 includes temperature sensors 25a, 25b, 2
5c indicate a high temperature equal to or higher than a predetermined value for each of the detected signals, the valve opening of the flow control valve 19 is increased via the driver 26, and the temperature sensor 25
When any one of the signals detected by a, 25b, and 25c is a predetermined low temperature attached to each temperature sensor, the valve opening is reduced, and when a predetermined temperature lower than the low temperature is reached, the flow rate is reduced. The control valve 19 is closed, and a switch 28 for supplying power to the motor 27 for driving the pump 14 is opened to turn off the motor 27 and stop the pump 14.

The pressure signal of the waste liquid detected by the pressure detector 21 for detecting the pressure of the waste liquid in the discharge pipe 16 on the upstream side of the strainer 22 is sent to the control unit 13, and when the pressure signal becomes higher than a predetermined pressure. The control device 13 closes the flow control valve 19 via the driver 26 and controls the switch 2
8, the motor 27 and the pump 14 are stopped. Thereby, the discharge pipe 16 due to the clogging of the strainer 22 is
The abnormal pressure rise and the damage of the strainer 22 are prevented.

In the above configuration, the waste liquid in the furnace 1 vaporizes its water by burning the fuel 4 and the contained cleaning agent and the components cleaned by the cleaning agent are incinerated.
The ash 4a is deposited together with the fuel 4 on the bottom surface of the air distribution chamber 1a under the grate 2. The waste liquid incineration capacity is set to be sufficiently larger than the amount of waste liquid sent from the waste liquid transport pipe 6. The difference between the incineration capacity and the amount of waste liquid sent to the waste liquid tank 5 is designed so that the liquid level of the waste liquid in the waste liquid tank 5 is between the upper limit liquid level H and the lower limit liquid level L in the medium to long term. .

In the above description, the relationship between the flow rates is as follows. Assuming that the flow rate equal to the average flow rate fed by the waste liquid transport pipe 6, that is, the balanced flow rate is the valve opening degree at which the flow regulating valve 19 can flow, the nozzle 17 is sprayed with the nozzle 17 larger than this balanced flow rate. The flow control valve 19 can be opened to the maximum valve opening at which the obtained maximum flow rate can flow. Further, the controller 13 controls the minimum flow rate of the flow rate control valve 19, which limits the flow rate of the flow rate to the liquid flow control valve 19, so that the flow rate of the flow rate can be sprayed by the nozzle 17. The flow control valve 19 can be opened and closed although a valve opening smaller than the valve opening of the minimum flow rate is not used.

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 tank 5 through the ball tap 7.

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 4 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.

The signals detected by the temperature sensors 25a, 25b and 25c are sent to the control device 13 respectively. Control device 13
Are temperature sensors 25a, 25b, 2
5c, it is determined based on the detected signal, and when it is determined that all the temperature sensors indicate the temperature distribution at which the waste liquid can be ejected, for example, each of the temperature sensors 25a, 25b, 25c is equal to or higher than a predetermined minimum temperature. The flow control valve 19 is opened via the driver 26, the switch 28 is closed, the motor 27 is driven, and the pump 14 is operated. The pump 14 draws up the waste liquid in the waste liquid tank 5 through the suction pipe 15, pressurizes the waste liquid, and discharges it to the discharge pipe 16. The motor 27 is, for example, an induction motor that is directly driven by a commercial power supply, and the pump 14 is a constant discharge pump that operates at a constant speed. The flow rate of the waste liquid discharged from the pump 14 to the discharge pipe 16 is adjusted by a flow control valve 19, foreign matter in the waste liquid is removed by a strainer 22, sent to a nozzle 17, and the fuel 4 in the furnace body 1 is burned from the nozzle 17. Sprayed towards the flame. The waste liquid discharged by the pump 14 passes through the discharge pipe 16 and is flow-regulated by the flow control valve 19 to be sent to the nozzle 17. However, since the pump 14 is rotating at a constant speed, the discharge pressure is not limited even if it is a non-volume pump. Is small and the displacement is constant in the case of the positive displacement type. Therefore, the excess waste liquid limited by the flow control valve 19 is discharged from the branch 18 to the waste liquid return pipe provided with the reflux flow control valve 24. 23 returns to the waste liquid tank 5.

The control at the start of the flow control valve 19 is performed by setting the valve opening to the minimum opening capable of spraying from the nozzle 17 and estimating the combustion state from the temperature distribution in the furnace body 1 by the temperature sensors 25a, 25b and 25c. The control device 13 gradually increases the valve opening and keeps the combustion state good.

Next, control of the flow rate of the waste liquid injected from the nozzle 17 will be described. Even if the waste material such as wood is controlled by the stoker, it is difficult to keep the combustion state constant because the fuel 4 is waste wood or the like even when the speed of the stoker is controlled. Flow rate control is being performed.

When the temperature sensors 25a, 25b and 25c detect the temperature inside the furnace body 1, their signals are sent to the control device 13. The control device 13 performs the following control, for example. When all of the temperature sensors 25a, 25b, and 25c indicate a preset maximum temperature, the valve opening degree of the flow control valve 19 is increased via the driver 26, whereby the nozzle 17
The amount of the waste liquid sprayed into the furnace body 1 from is increased to the maximum. When any one of the temperature sensors 25a, 25b, 25c indicates a predetermined minimum temperature for each of the temperature sensors 25a, 25b, 25c, the flow control valve 19
, The amount of waste liquid sprayed from the nozzle 17 into the furnace body 1 is reduced. Even if, for example, the fuel supply is low and the temperature inside the furnace body 1 drops and the flow rate of the waste liquid at the nozzle 17 becomes the minimum flow rate at which the waste liquid flows out without being sprayed, the minimum temperature determined for each of the temperature sensors 25a, 25b and 25c When any of the temperature sensors 25a, 25b, and 25c indicates the following predetermined combustion failure limit temperature, the control device 13 opens the switch 28, cuts off the motor 27, stops the pump 14, and turns off the driver. 2
The flow regulating valve 19 is closed via 6.

When the temperature inside the furnace body 1 recovers to such an extent that the waste liquid can be ejected from the nozzle 17, the controller 13 causes the flow control valve 19 via the driver 26 to spray the waste liquid flowing out of the nozzle 17. And the switch 28 is closed so that the valve opening is set to a minimum value so that the flow rate required for the operation is attained. As a result, the motor 27 rotates, the pump 14 is operated, and the waste liquid in the waste liquid tank 5 is discharged from the suction pipe 15 through the pump 1.
The pressure is sucked into the nozzle 4, passes through the discharge pipe 16, and the flow rate is controlled by the flow rate adjusting valve 19, foreign matter is removed by the strainer 22, and is sprayed from the nozzle 17.

Thus, the temperature sensors 25a, 25b, 25
If any of c detects a temperature equal to or higher than a predetermined maximum temperature for each of them, the waste liquid of the maximum flow rate is sprayed from the nozzle 17,
When any one of the temperature sensors 25a, 25b, 25c detects a predetermined minimum temperature, the waste liquid of the minimum flow rate is sprayed from the nozzle 17, and
When 5a, 25b and 25c indicate the intermediate temperatures between the maximum and minimum temperatures, the control device 13 having received the signal judges the combustion state, and sets the flow control valve 19 via the driver 26 to the intermediate position between the minimum and maximum. The flow rate of the waste liquid is adjusted to adjust the valve opening degree.

When the pressure detector 21 detects a predetermined maximum pressure of the waste liquid in the discharge pipe 16, it sends a signal to the control device 13, and the control device 13 closes the flow control valve 19 via the driver 26. , The switch 28 is opened and the motor 2
7 is cut off, and the pump 14 is stopped. As a result, clogging of the strainer 22 is detected and displayed on a display (not shown).

The liquid level of the waste liquid in the waste liquid tank 5 is controlled as follows. The liquid level in the waste liquid tank 5 is normally controlled between the upper limit liquid level probe 9 and the lower limit liquid level probe 11. That is, the amount obtained by subtracting the amount of waste liquid which is pumped from the waste liquid tank 5 by the pump 14 to the waste liquid tank 5 through the waste liquid return pipe 23 with the branching portion 18 and the return flow regulating valve 24 interposed therebetween is subtracted from the amount of waste liquid. The gas is sprayed into the furnace body 1 through the flow control valve 19, the strainer 22, and the nozzle 17.
If the amount of the waste liquid sent through the waste liquid transport pipe 6 is large with respect to this spray amount, the liquid level of the waste liquid tank 5 rises, and the waste liquid transport pipe 6 sends the waste liquid into the furnace body 1 with respect to the spray amount of the waste liquid. If the amount of the waste liquid is small, the liquid level in the waste liquid tank 5 decreases. on the other hand,
Since the amount of the waste liquid sprayed from the nozzle 17 into the furnace body 1 is on average larger than the flow rate of the waste liquid sent through the waste liquid transport pipe 6, the liquid level of the waste liquid in the waste liquid tank 5 tends to decrease.

Then, the liquid level of the waste liquid in the waste liquid tank 5 becomes the lower limit liquid level L, and the lower limit liquid level probe 11 detects the lower limit liquid level L. When the signal is input and the control device 13 determines that the valve opening of the flow control valve 19 is equal to or greater than the equalizing valve opening at which the flow rate equals the waste liquid flow rate in the waste liquid oil feed pipe 6, the flow control valve is controlled via the driver 26. By driving the valve 19, the valve opening is minimized. If the valve opening is the minimum valve opening, the valve is closed, the switch 28 is opened, the motor 27 is turned off, and the pump 14 is stopped.
On the other hand, the waste liquid is continuously supplied from the waste oil feed pipe 6 to the waste tank 5. As a result, the liquid level of the waste liquid in the waste liquid tank 5 gradually increases.

When the upper limit liquid level probe 9 detects the upper limit liquid level of the waste liquid as a result of the above liquid level rise, the control device 13 which has received the signal indicates that the flow control valve 19 has the minimum valve opening degree. Since the incineration capacity of the furnace body 1 has been recovered so as to be larger than the flow rate of the waste liquid flowing through the waste oil feed pipe 6, the steady state is usually gradually increased in accordance with the temperatures detected by the temperature sensors 25a, 25b and 25c as described above. Move to operation. That is, when all of the temperature sensors 25a, 25b, and 25c indicate the respective set maximum temperatures or higher, the flow control valve 19
The maximum opening of the valve is set to the maximum, and the temperature sensors 25a, 25b,
If any one of c indicates the set minimum temperature, the valve opening of the flow control valve 19 is minimized, and the temperature detected by the temperature sensors 25a, 25b, 25c between the minimum and maximum valve opening. The flow rate control of the waste liquid according to the signal is performed.

Further, in the above, the control device 13 in which the liquid level rises from the lower limit liquid level L to the upper limit liquid level H and the signal of the upper limit liquid level probe 9 is input, based on the signal detected by the lower limit probe 9, If the flow control valve 19 has been closed, the valve is opened to the minimum valve opening degree, the switch 28 is closed, the motor 27 is energized, and the pump 14 is operated. The temperature sensors 25a, 25b,
The flow rate of the waste liquid is controlled according to the detected temperature of 25c.

It should be noted that the control was performed with the normal minimum and maximum valve opening. However, when the flow regulating valve 19 is slightly larger than the minimum valve opening or when the valve opening is smaller than the equalizing valve opening. In the subsequent case, since the flow rate of the waste liquid ejected from the nozzle 17 becomes smaller than the flow rate of the waste liquid sent from the waste liquid transport pipe 6, the liquid level of the waste liquid in the waste liquid tank 5 continues to rise. H is detected. When the signal of the upper limit liquid level probe 9 is sent to the control device 13, the control device 13 determines that the combustion state is closer to the lowest for some reason than the temperature signals detected by the temperature sensors 25a, 25b, and 25c, and the flow control valve It is determined that it is appropriate not to change the valve opening of No. 19.

As a result, the liquid level of the waste liquid in the waste liquid tank 5 continues to rise, and the over liquid level probe 8 detects an over liquid level OH higher than the upper limit liquid level H.
When the control device 13 is sent to the alarm lamp and the buzzer 1
Energize 0. At the same time, when an electromagnetic valve is interposed in the waste liquid transport pipe 6, the electromagnetic valve is closed. In this example, when the liquid level in the waste liquid tank 5 reaches the over-liquid level OH, the ball tap 7 closes, and the flow of the waste liquid from the waste liquid transport pipe 6 into the waste liquid tank 5 stops.

The operator checks the cause by the alarm lamp and the alarm of the buzzer 10, and considers that the supply of the fuel 4 is insufficient, for example, and increases the supply amount of the fuel 4. Then, while the inflow of the waste liquid into the waste liquid tank 5 is limited to the intermittent operation, the spray of the waste liquid from the nozzle 17 increases and continues due to the recovery of the combustion state, so that the liquid level falls below the upper limit liquid level H,
Based on the detected signal from the upper limit liquid level probe 9, the controller 13 adjusts the spray amount of the waste liquid from the nozzle 17 by changing the valve opening of the flow control valve 19 between the minimum and the maximum as described above. Is what you do.

(Embodiment 2) In Embodiment 2 shown in FIG. 2, a variable speed pump is used as a pump. In this embodiment, members denoted by the same reference numerals as those in the first embodiment are the same or corresponding members as those described in the first embodiment, and the description of the first embodiment is referred to for the same members.

The control device 13 includes temperature sensors 25a, 25
When the temperature signals b and 25c are input, a frequency signal is sent to the inverter 31, and the inverter 31 adjusts the flow rate of the pump 14, which is a turbine pump, by changing the speed of a motor 27 such as an induction motor suitable for inverter control. Pump 1
The discharge pipe 16 of No. 4 is provided with an electromagnetic valve 32 that performs only opening and closing.
A pressure detector 21 for detecting the pressure of the waste liquid in the discharge pipe 16 upstream or downstream of the solenoid valve 32 is provided. As the nozzle 17, a variable discharge amount nozzle is used, for example, as shown in a vertical sectional view of FIG.

The conical throat 33a at the end of the nozzle body 33 is provided with a valve portion 34a of a conical needle valve 34 that comes into contact with the throat 33a when fully closed. The shaft portion 34b of the needle valve 34 is fitted to the nozzle body 33 movably in the axial direction, and the pinion 35 intersects with the axial rack 34c provided at the rear end of the shaft portion 34b.
a is engaged. An electric servomotor 35 with a speed reducer having a pinion 35 a is fixed to the nozzle body 33. A waste liquid inlet 33 b communicating with the throat 33 a of the nozzle body 33 is connected to the discharge pipe 16. The electric servomotor 35 is connected to the control device 1 via a driver (not shown).
3 is controlled.

The operation of supplying waste liquid to the furnace 1 in the above configuration will be described.

When the fuel 4 in the furnace body 1 is ignited, the solenoid valve 32 is closed at the time of startup, and the control device 13 sends a frequency signal for rotating the pump 14 at the lowest speed to the inverter 31 to drive the motor 27 to the lowest speed. And the pump 14 is closed and operated.

The furnace is started up and the temperature sensors 25a, 25
The control device 13 which has received the signals b and 25c
7 determines that it is in a combustion state in which injection can be performed.
Reference numeral 3 drives the servomotor 35, rotates the pinion 35a, moves the rack 34c, minimizes the valve opening between the needle 34a and the throat 33a, and opens the solenoid valve 32.

The pump 14 pressurizes the waste liquid sucked by the suction pipe 15 and discharges it to the discharge pipe 16, supplies the waste liquid from the waste liquid inlet 33 b to the nozzle 17 through the electromagnetic valve 32 and the strainer 22, and supplies the waste liquid to the furnace 1. The waste liquid is sprayed toward the internal combustion flame to vaporize moisture in the waste liquid and incinerate the contents.

In the above, the needle 34 of the nozzle 17
It is necessary that the pressure inside the discharge pipe 16 on the upstream side between the a and the throat 33a be kept within a certain range in accordance with the valve opening of the nozzle 7, so that the evaporative combustion of the waste liquid is suitably performed. Then, the control device 13 receives the signals of the temperature sensors 25a, 25b, 25c,
Based on the signal, the valve opening of the nozzle 17 is calculated, the servomotor 35 is driven to adjust the valve opening, and a frequency signal is sent to the inverter 31 in accordance with the valve opening so as to perform, for example, constant discharge pressure control. The inverter 31 drives the motor 27 to change the speed of the pump 14 so as to make the waste liquid supply pressure to the nozzle 17 constant.

(Embodiment 3) In Embodiment 3, an ejector is provided in the nozzle 17, and a pump is not used for feeding waste liquid. FIG. 4 shows the third embodiment. In the drawings, the same or equivalent members as those of the first embodiment are denoted by the same reference numerals, and the description of the first embodiment is used for the same members.

The nozzle 17 has an ejector inside, and the end of the compressed air pipe 36 is connected to the air supply port 17a of the ejector. The compressed air pipe 36 is connected to a compressed air source such as a compressed air device (not shown). The compressed air pipe 36 is provided with a flow rate adjusting valve 37 such as a motor valve, a duty-controlled solenoid valve, and an air valve. One end of a waste liquid suction pipe 38, one end of which is immersed in the waste liquid tank 5, is connected to the waste liquid suction port 17 b of the ejector of the nozzle 17. The strainer 22 is interposed in the waste liquid suction pipe 38.

The controller 13 adjusts the opening degree of the flow control valve 37 according to the temperature state in the furnace body 1 based on the signals of the temperature sensors 25a, 25b and 25c and sends the compressed air to the nozzle 17 through the compressed air pipe 36. The air amount is adjusted, and the amount of waste liquid pumped from the waste liquid tank 5 through the waste liquid suction pipe 38 is adjusted.

In the embodiment, the nozzle is used as the spraying means, but the waste liquid may flow down to a high-speed rotating disk instead of the nozzle to atomize.

In the embodiment, two temperature sensors are provided in the combustion chamber and one temperature sensor in the chimney. However, the number of temperature sensors may be one or more.

[0061]

According to the first aspect of the present invention, there is provided a furnace body using waste as fuel, a combustion device for burning fuel in the furnace body, a smoke exhaust means provided in the furnace body, and a waste liquid flowing into the furnace. In a waste liquid treatment apparatus including atomizing means for spraying and waste liquid feeding means for feeding waste liquid to the atomizing means , the temperature detecting means is configured to detect a temperature inside the furnace.
Is detected, and any of the temperature detecting means sets a preset maximum temperature.
Degree, the amount of waste liquid sprayed into the furnace increases to the maximum,
One of the temperature detecting means is provided for each of the temperature detecting means.
When the minimum temperature is determined in advance, the amount of waste liquid sprayed into the furnace
By having a control means for reducing the amount of combustible components, one or more of the components of the cleaning agent contained in the waste liquid and / or the components removed from the object to be cleaned are unknown.
It can be processed without knowing . And the combustion state inside the furnace
Condition is better estimated by multiple temperature sensing means,
Includes waste liquid because the amount of waste liquid spray can be adjusted according to the condition
The components can be incinerated efficiently.

According to a second aspect of the present invention, in the first aspect, the temperature in the furnace is lowered and the flow rate of the waste liquid is not sprayed.
Even when the flow rate reaches the minimum flow rate, each of the temperature detection means
A predetermined combustion failure below the specified minimum temperature.
If any of the temperature detection means indicates the good limit temperature,
By providing the control means for stopping the feeding, it is possible to prevent an abnormal state in which the spraying of the waste liquid is performed in a state in which the combustion in the furnace during operation does not generate a flame.

[0063]

[0064]

[0065]

[0066]

[0067]

[0068]

[0069]

[0070]

According to a third aspect of the present invention, in the first aspect, a waste liquid storage tank is provided, and the waste liquid is discharged from a waste liquid generating source.
Means for feeding to the storage tank, the lower limit liquid level of the waste liquid storage tank and
Equipped with liquid level detection means for detecting the upper limit liquid level,
Waste liquid feeding of waste liquid feeding means that sends waste liquid to atomizing means when it comes out
Set the minimum flow or stop and detect the upper limit liquid level
Increase waste liquid supply to atomization means as far as possible
And keep the liquid level in the waste liquid storage tank between the upper and lower liquid levels as much as possible.
This makes it possible to control the atomizing means without following the change in the amount of waste liquid generated from the source of waste liquid.

[0072]

[0073]

[Brief description of the drawings]

FIG. 1 is a flow sheet of Example 1 of the present invention.

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

FIG. 3 is a longitudinal sectional view of a nozzle according to a second embodiment.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Furnace 4 Fuel 5 Waste liquid tank 6 Waste liquid transport pipe 7 Ball tap 8 Over liquid level probe 9 Upper limit liquid level probe 11 Lower limit liquid level probe 12 Level switch 13 Controller 14 Pump 16 Discharge pipe 17 Nozzle 19 Flow control valve 21 Pressure detector Reference Signs List 22 Strainer 23 Return pipe 24 Reflux flow control valve 25a, 25b, 25c Temperature sensor 27 Motor 28 Switch 31 Inverter 32 Electromagnetic valve 36 Compressed air pipe 37 Flow control valve 38 Waste liquid suction pipe

Claims (3)

(57) [Claims] 1. A furnace body using waste as fuel, a combustion device for burning fuel in the furnace body, a smoke exhaust means provided on the furnace body,
And atomizing means for atomizing the liquid waste into the furnace, the waste liquid treatment apparatus odor with a waste feeding means for feeding the waste, the to atomizing means
Equipped with multiple temperature detecting means for detecting the temperature inside the furnace.
The temperature detecting means detects the temperature inside the furnace and detects the temperature.
If any of the means show a preset maximum temperature,
Increase the amount of waste liquid sprayed to the maximum
One is the minimum temperature predetermined for each temperature detecting means.
Control means to reduce the amount of waste liquid sprayed into the furnace
A waste liquid treatment device comprising: 2. The temperature in the furnace falls, and the flow rate of waste liquid is sprayed.
Even if the flow rate reaches the minimum
Pre-determined below the minimum temperature defined for each of the stages
Any of the temperature detecting means indicates the defective combustion limit temperature
And control means for stopping the supply of the waste liquid.
The waste liquid treatment apparatus according to claim 1, wherein 3. A waste liquid storage tank having a waste liquid storage tank.
For feeding wastewater to the waste liquid storage tank and the lower limit of the waste liquid storage tank
Equipped with a liquid level detecting means for detecting the liquid level and the upper limit liquid level,
When the liquid level is detected, the waste liquid
Set the waste liquid supply to the minimum flow rate or stop it, and set the upper limit liquid level.
If detected, supply of waste liquid to
Increase the supply and set the liquid level in the waste liquid storage tank as high and low as possible
The waste liquid treatment apparatus according to claim 1, wherein the waste liquid treatment apparatus is maintained between the two .