JP3004486U - Evaporative oil-containing wastewater treatment device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an oil-containing wastewater treatment device which emits no harmful gas or offensive odor and has a low equipment cost. [Structure] An evaporation pot 11 is installed on the heating furnace 1. The evaporation pot 11 includes an evaporation dish 13 and a hood 15 that covers the evaporation dish 13. The waste water in the waste water tank 9 is sent to the evaporating dish 13 and maintains a substantially constant liquid surface. A plurality of combustion deodorizing cylinders 19 are attached to the tip of the hood 15, and these cylinders project into the smoke path 5 of the heating furnace. Each combustion deodorizing cylinder 1
Reference numeral 9 is a cylindrical body having a plurality of holes 21 formed in its peripheral surface. Chimney 7
There is an air preheater 23 at the root of the, and the outside air warmed by the exhaust gas passing through the chimney 7 is sent into the hood 15 through the duct 28. An oil skimmer 27 is attached to the evaporator to continuously collect oil.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a treatment device for oily wastewater discharged from a machine factory or the like.

[0002]

[Prior art]

 The incineration method has been widely used for the treatment of oil-containing wastewater, but this method has the drawback that not only exhaust gas causes a new pollution problem but also the furnace material deteriorates in a short time. .

Although there is a method using an emulsion breaker or an ion exchange method, a sufficient treatment is difficult only by this and a large amount of cost is required for the secondary treatment. Further, the evaporation method has a problem that harmful gas and a bad odor are emitted.

[0004]

[Problems to be solved by the device]

 It is an object of the present invention to provide an evaporative oil-containing wastewater treatment device which does not emit harmful gas or foul odor and is inexpensive in equipment cost.

[0005]

[Means for Solving the Problems]

 In the evaporative oil-containing wastewater treatment device of the present invention, an evaporating pot for storing wastewater is installed on the heating furnace. An incinerator / deodorizer tube with multiple holes on the circumference is installed in the smoke path of the heating furnace, and this combustion / deodorizer tube is connected to the upper space of the evaporator. In addition, an oil skimmer will be installed to collect oil from the wastewater of the evaporation tank. An air preheater that warms the air with the exhaust gas of the heating furnace is provided, and a duct that blows out toward the oil skimmer is provided along the liquid surface of the wastewater in the evaporation tank.

[0006]

[Action]

 The waste water in the evaporator is heated by the heating furnace, and the water evaporates and reaches the combustion deodorizing cylinder. This combustion deodorizing cylinder is in the smoke path of the heating furnace and has a high temperature. When steam passes through it, the foreign substances contained therein are burned and decomposed. In this way, the water vapor deodorized and the toxic gas removed is released to the atmosphere.

The air warmed by the air preheater is blown out from the duct into the inside of the evaporator, and the oil component floating above the wastewater is blown toward the oil skimmer and collected by the oil skimmer.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 is a heavy oil-fired heating furnace, 3 is an oil burner, 5 is a smoke path, and 7 is a chimney. A wastewater tank 9 is provided in contact with the smoke path 7, and the wastewater in the tank is preheated by the exhaust gas.

An evaporation pot 11 is installed on the heating furnace 1. The evaporation pot 11 comprises an evaporation tray 13 and a hood 15 covering the evaporation tray 13. The waste water in the waste water tank 9 is sent to the evaporating dish 13 and maintains a substantially constant liquid level. A plurality of combustion deodorizing cylinders 19 are attached to the tip of the hood 15, and these cylinders project into the smoke path 5 of the heating furnace. As shown in FIG. 3, each combustion / deodorization cylinder 19 is a cylinder having a plurality of holes 21 formed in its peripheral surface.

Reference numeral 27 is an oil skimmer. In this system, a lipophilic endless belt 27a is rotationally driven to adsorb the oil floating in the waste liquid in the evaporation dish, and squeezes the oil to continuously collect the oil. There is an air preheater 23 at the base of the chimney 7, and while the outside air taken in by the intake fan 25 passes through the air preheater, it is warmed by the exhaust gas passing through the chimney 7 and enters the hood 15 from the duct 28. Sent in. The duct 28 is flat, and the air outlet is along the liquid surface of the waste liquid and faces the oil skimmer.

In this apparatus, the wastewater 29 in the evaporation pot 11 is heated in the heating furnace 1, and the water is evaporated from the wastewater. The air warmed by the air preheater 23 is sent to the evaporator by the fan 25 to have a positive pressure, so that the steam continuously flows toward the combustion deodorizing cylinder 19. Since warm air is sent into the hood, the hood itself is kept warm and steam does not condense and return to water.

By the way, the combustion deodorizing cylinder 19 projects into the smoke path 5 of the heating furnace and has a high temperature of 800 ° C. or higher. Therefore, when the water vapor passes through this cylinder, the impurities contained therein are burned and decomposed. In this way, the harmful gas and the steam without the bad smell are released to the atmosphere through the chimney 7.

As the water content evaporates, the oil content of the waste liquid in the evaporating dish becomes thicker. The oil content is collected by the oil skimmer 27 and collected in the waste oil tank 31. Since the outlet of the duct 28 that blows warm air into the evaporator is along the liquid surface and faces the oil skimmer, the oil floating above the waste liquid is blown by the oil skimmer. The oil skimmer collects the oil efficiently.

By blowing warm air to the waste liquid from the duct, it also has a function of eliminating bubbles formed on the surface of the waste liquid. It also has the effect of promoting evaporation.

[0015]

[Effect of device]

 As described above, in the evaporative wastewater treatment device of the present invention, the impurities contained in the water vapor are exposed to high temperature in the combustion deodorizing cylinder and burned and decomposed. No offensive odor remains. In addition, the oil remaining in the evaporator can be continuously collected by the oil skimmer, so that the waste liquid can be continuously processed. It is also possible to separate the collected waste liquid.

Since the air heated by the air preheater that uses the waste heat of the heating furnace is introduced into the evaporation tank, the evaporation tank is hard to cool. Therefore, not only the thermal efficiency is good, but also the steam is used in the hood of the evaporation tank. It has the effect of not touching and condensing. Furthermore, the air warmed by the air preheater is blown out from the duct along the liquid surface of the wastewater in the evaporator and toward the oil skimmer, so the oil floating in the wastewater is directed toward the oil skimmer. It has the effect of being able to be blown away and the oil can be efficiently collected by an oil skimmer.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of the device of the present invention.

FIG. 2 is likewise a transverse cross-sectional view of the central portion.

FIG. 3 is a perspective view of a combustion deodorizing cylinder.

[Explanation of symbols]

 1 Heating Furnace 5 Flume 11 Evaporator 19 Combustion Deodorizing Tube 21 Hole 27 Oil Skimmer 28 Duct

Claims (1)

[Scope of utility model registration request] 1. A heating furnace (1), an evaporation tank (11) placed on the heating furnace for storing waste water, and an upper space of the evaporation tank communicate with each other, and a smoke path of the heating furnace. An incineration deodorizing cylinder (1) installed in (5) and having a plurality of holes (21) in its peripheral surface.
9), an oil skimmer (27) that collects oil from the waste water of the evaporator, an air preheater (23) that warms air with the exhaust gas of the heating furnace, and an air warmed by the air preheater,
An evaporative oil-containing wastewater treatment device comprising a duct (28) blown out toward the oil skimmer along the liquid surface of the wastewater in the evaporator.