JPH05237471A - Vaporizing thickening apparatus for waste water - Google Patents

Abstract

PURPOSE:To dispense with maintenance cost of risk management for utilizing a pressure vessel by reducing loss of heat energy, preventing occurrence of scales and using no boiler in a vaporizing thickening apparatus for waste water. CONSTITUTION:A waste water tank 1 wherein a waste water 2 contg. a detergent used for cleaning work is stored is made to communicate with a heating tank 8 through a pump 4. A heating source 9 is formed in this heating tank 8 and a heat exchanging pipe 11 made to communicate with the pump 4 and wherein the waste water 2 is passed through is positioned in the heating tank 8. The apex part of this heat exchanging pipe 11 is made to communicate with the waste water tank 1 and steam generated by heating the waste water 2 in the heating tank 8 is condensed in the waste water tank 1 or is discharged outside. In addition, this waste water 2 is circulated and passed through in the heat exchanging pipe through the pump 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to mechanical parts, electronic parts,
The present invention relates to a device for evaporating and concentrating waste water used for cleaning medical equipment and the like.

[0002]

2. Description of the Related Art Conventionally, in order to reduce the amount of waste water used for cleaning an object to be cleaned, the waste water is heated to evaporate the water content.

[0003]

Conventionally, such a waste water evaporation method indirectly produces waste water by producing high temperature steam using a boiler and passing the high temperature steam through a heat exchange pipe located in the waste water. The method of heating and evaporating is used. When the waste water is evaporated, the cost required is greatly affected by how to efficiently use the thermal energy obtained from burning heavy oil, kerosene, propane and the like.

In the conventional method of producing steam with a boiler and indirectly heating waste water through the heat exchange tube, loss of heat energy is first generated when producing steam. Further, when the waste water is heated by the high temperature steam through the heat exchange pipe, the loss of thermal energy is generated again.
Therefore, when attempting to evaporate and concentrate the wastewater by the conventional method, the heat energy will be lost twice when the steam is produced and when the wastewater is heated.

In the method of conducting heat to the waste water through the heat exchange pipe, the heat conducting area is increased. Since it is necessary to form the heat exchange tube long, a large space volume is required.

In addition, the water flowing through the heat exchange tubes causes
Scale adheres to the inner surface of the heat exchange tube, and waste water is statically located on the outer surface of the heat exchange tube. ing.

[0007] The present invention is intended to solve the above problems, to reduce the loss of thermal energy,
Prevent the occurrence of scale, etc. Further, by not using a boiler or the like, it is an object to eliminate maintenance costs for risk management for using the pressure vessel.

[0008]

In order to solve the above-mentioned problems, the present invention forms a waste water tank for storing waste water containing a detergent component used for washing work, and a heating tank is provided in this waste water tank via a pump. A heat exchange pipe for communicating wastewater with a pump is formed in the heating tank while forming a heating source in the heating tank, and the tip of the heat exchange pipe is communicated with the wastewater tank. The steam generated by heating the waste water in the heating tank is condensed in the waste water tank or discharged to the outside, and the waste water is circulated through the heat exchange pipe through the pump.

The tip of the heat exchange tube may be connected to the side surface of the insertion tube, the lower end of which is inserted into the waste water and the upper end of which is projected above the waste water.

Further, the wastewater flows through a pump to a heat exchange pipe in the washing work tank for washing the object to be washed, and then flows into the heat exchange pipe in the heating tank via the heat exchange pipe. It may be one that does.

[0011]

Since the present invention is configured as described above, in order to heat and evaporate the waste water in the waste water tank to reduce the volume,
The pump connected to the waste water tank is operated to pass the waste water through the heat exchange pipe of the heating tank.

Then, the heating source provided in the heating tank is operated,
By heating the inside of the heating tank, the waste water in the heat exchange pipe is heated and vaporized. This vaporized waste water vapor is sent into the waste water tank to which the heat exchange pipe connects the tips, and the steam is condensed by the cooling pipe formed in the waste water tank, or
Or discharge it to the outside.

The waste water that has not been completely vaporized in the heating tank is returned to the waste water tank as it is, and is then returned to the heat exchange pipe of the heating tank via the pump again. By repeating this reflux, the heat source is small, and the waste water can be efficiently heated and vaporized even with a small heat exchange area.

Further, since heating of the wastewater is not performed by using a boiler as in the conventional case, a pressure vessel is not required and safety management for steam generation is facilitated.

Further, since the heat exchange tube can be directly heated without generating steam or the like by the heating source,
Compared to the case where water is vaporized and used as before,
Less energy loss occurs.

Further, since the waste water containing the detergent used for the cleaning work is circulated inside the heat exchange tube, the inside is always washed and a scale or the like may be attached to the inside of the heat exchange tube. Absent.

Further, the lower end of the heat exchange pipe is not connected to the waste water in the waste water tank, but the lower end is inserted into the waste water and the upper end opening is communicated with the side surface of the insertion pipe protruding above the waste water. Thus, unlike the case where the heated wastewater is directly discharged into the wastewater in the wastewater tank, vigorous bubbles are not generated in the wastewater. Therefore, a stable wastewater state in the wastewater tank can be maintained.

Further, if the high temperature waste water is flowed through the heat exchange pipe in the cleaning work tank through the pump, it becomes possible to heat the working liquid in the cleaning tank, the rinsing tank, etc. through this heat exchange pipe. The heat energy of the heating source for heating in the heating tank can be effectively used.

Further, by connecting the inside of the waste water tank to a vacuum pump or the like to reduce the pressure, the waste water has a low boiling point and can be vaporized at a low temperature, so that it is possible to reduce the use of heat energy.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (1) is a waste water tank, in which the waste water (2) used for cleaning work is stored. This wastewater (2) is used for washing mechanical parts, electronic parts, medical equipment, etc., and contains a detergent component such as a surfactant.

Further, at the lower end of the waste water tank (1), the outlet pipe (3)
The pump (4) is connected via. This pump (4)
Through the filter (5) and control valve (6)
It is connected to the heating tank (8) by (7). This heating tank (8)
Inside, an appropriate heating source such as a heater or a combustion burner (9)
Is formed.

Further, a heat exchange pipe (11) is provided in the heating tank (8).
Forming a spiral shape, and introducing pipe (7) and this heat exchange pipe (11)
By connecting the above, the waste water (2) flowing through the heat exchange pipe (11) can be efficiently heated.

The tip of the heat exchange pipe (11) communicates with the waste water tank (1). This waste water tank (1) and heat exchange tubes
For communication with the tip of (11), the heat exchange pipe (11) may be connected to a portion of the side wall (12) of the waste water tank (1) that does not come into contact with the waste water (2). However, in the embodiment shown in the drawings, the insertion tube
The lower end of (13) is inserted into the wastewater (2) of the wastewater tank (1), and the upper end opening (14) is projected above the wastewater (2).
On the side surface of 3) protruding from the waste water tank (1), the heat exchange pipe (1
It is formed by connecting the connecting pipe (15) of 1).

The steam discharged from the heat exchange pipe (11) is introduced into the insertion pipe (13) and then discharged upward through the upper end opening (14). Further, this steam may be condensed by the cooling pipe (16) provided on the upper part of the waste water tank (1) and returned to the washing tank or the like, or may be used as a rinsing liquid. Further, when there is no influence on the outside air, it may be released into the atmosphere as it is.

The heated wastewater introduced into the insertion pipe (13) without being vaporized falls in the insertion pipe (13) and mixes into the wastewater (2) in the wastewater tank (1). If the heat exchange pipe (11) is directly connected to the wastewater (2) of the wastewater tank (1), the high temperature wastewater
Since (2) is mixed in the wastewater (2) with low temperature, the wastewater (2)
The generation of bubbles in the inside is made remarkable, and the liquid surface becomes extremely unstable. However, as described above, by introducing the heated wastewater (2) to the side surface of the insertion tube (13), it is possible to prevent the generation of bubbles in the wastewater (2).

In the above embodiment, the wastewater (2) is pumped.
It was directly introduced into the heat exchange tube (11) from (4). However, in another different embodiment, the cleaning work tank (17) for cleaning and rinsing the object to be cleaned and the pump (4) are connected to the second control valve.
It is connected by a bypass pipe (19) via (18). Next, a control valve (6) provided between the pump (4) and the heating tank (8)
Closed, the second control valve (18) is opened and the bypass pipe (1
Guide wastewater (2) to 9). After flowing the waste water (2) into the heat exchange pipe (21) connected to the bypass pipe (19), the waste water (2) is caused to flow into the heat exchange pipe (11) in the heating tank (8). Also good.

In this case, the heat exchange pipe (21) is placed inside a cleaning tank (17) such as a cleaning tank for cleaning the object to be cleaned or a rinse cleaning tank for rinsing and cleaning the object to be cleaned,
By positioning the heat exchange pipe (21) in the working liquid (22) for washing or rinsing and washing, it becomes possible to heat the working liquid (22).

Further, the cleaning work tank (17) and the waste water tank (1) are connected by a steam introducing pipe (24) through an opening / closing valve (23). Then, the steam introduced from the heat exchange pipe (11) or the steam generated from the waste water (2) in the waste water tank (1) is passed through the steam introduction pipe (24) to the working liquid of the cleaning work tank (17). (22)
It is also possible to perform steam cleaning of the object to be cleaned by introducing it into the upper part of.

Further, the waste water tank (1) is located at the upper end without fixing the lid body (25), and should the vapor pressure rise abnormally, the lid body (25) should be lifted due to this vapor pressure. It acts as a safety valve that opens.

[0030]

The present invention is constructed as described above,
Since the heat exchange pipe through which the waste water is circulated is directly heated by the heating source, the energy loss is reduced as compared with the conventional case where water is vaporized and used for heating.

Further, the waste water that has not been completely vaporized in the heating tank is recirculated into the waste water tank and is recirculated to the heat exchange pipe of the heating tank via the pump again. A small and small heat exchange area enables efficient heating and vaporization of wastewater.

Further, since heating of the wastewater does not use a boiler and a pressure vessel is unnecessary, safety management for steam generation is facilitated.

Further, since the waste water containing the detergent is circulated inside the heat exchange pipe, the inside is constantly washed and the scale or the like is not attached to the inside of the heat exchange pipe.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Waste Water Tank 2 Waste Water 4 Pump 8 Heating Tank 9 Heating Source 11 Heat Exchange Pipe 13 Insertion Pipe 21 Heat Exchange Pipe

Claims (3)

[Claims] 1. A waste water tank for storing waste water containing a detergent component used for washing work is formed, and a heating tank is connected to this waste water tank via a pump to form a heating source in the heating tank and the heating tank. Inside, there is a heat exchange pipe that communicates with the pump to pass the wastewater.The tip of this heat exchange pipe is connected to the wastewater tank, and the steam generated by heating the wastewater in the heating tank An evaporative concentration device for waste water, characterized in that the waste water is condensed or discharged to the outside and is circulated through a heat exchange pipe through a pump. 2. The heat exchange pipe has a tip portion which is inserted into a waste water at a lower end thereof and has an upper end opening which is projected to an upper portion of the waste water and communicates with a side surface of the insertion pipe. Evaporative concentrator of the wastewater described. 3. The wastewater flows through a pump to a heat exchange pipe in a cleaning work tank for washing the object to be cleaned, and flows into the heat exchange pipe in the heating tank via the heat exchange pipe. The evaporative concentration device for wastewater according to claim 1, wherein the evaporative concentration device is wastewater.