SU1698578A1 - Device for neutralizing used cutting fluids - Google Patents

Abstract

The invention relates to the treatment of wastewater and can be used in machine shops for the disposal of processed coolant (coolant). The aim of the invention is to reduce energy costs. The device is equipped with a superheater 8 coolant, the outlet of which is connected to the sprayers 2 coolant installed in the evaporator 1, made in the form of a tank, in the upper part of which there is a heat exchanger 4 connected to the tube space of the preheater 6 by means of the inlet nozzle and an ejector 7. A mixing chamber of which is placed in the annular space of the preheater 6, and the inlet inlets for the evaporator are connected to the capacity of the evaporator and the collector 10 of condensate 2 sludge. sl C

Description

The device relates to the treatment of wastewater and can be used in machine shops for the disposal of waste coolant (coolant) to emit process water and then use it to prepare new coolant.

The purpose of the invention is to reduce energy costs.

Fig. 1 shows the installation for the disposal of coolant; Fig. 2 is a graph of the surface tension coefficient as a function of the coolant temperature;

The installation contains an evaporator 1 with sprays 2 and a branch pipe 3 located in the lower part to drain the remainder. A heat exchanger 4 with a pallet 5 is installed in the cooler.

The device has a superheater 8 connected to a heat exchanger and sprays, a pump 9, the discharge port of which is connected to the ejector, and the inlet to the 1Q tank for collecting condensate.

The proposed device works as follows

The exhaust coolant from the workshop system enters the heater 6, where it is preheated by condensing

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steam, then into a heat exchanger, where the temperature of the liquid increases due to the heat given off by the superheated steam. From the heat exchanger, the coolant enters the superheater 8, is superheated under pressure, and is fed through the nozzles 2 to the evaporator 1. In the evaporator, self-boiling and evaporation of water from the coolant occurs. Research has shown that the boiling point of the most thermolabile component of the high boiling coolant is not lower than 150 ° C. Since the superheat of the liquid does not exceed this temperature, the device ensures the purity of the condensate obtained (hardness of 0.006 mEq / ml 103, microboreability of 1-3 cells / ml for 3 days).

The evaporated residue is discharged through pipe 3, the steam is partially condensed on the tubes of the heat exchanger 4, the condensate is collected in the pan 5 and discharged from the evaporator 1. The remaining steam is drawn in by the ejector 7, where it is partially condensed and injected with water into the preheater 6, where the condensation process is completed. The mixture of condensate and water is directed to a container 10 for collecting condensate, which is discharged through pipe 11 to the coolant preparation area.

Pump 9 provides the operation of the condensate circuit.

In the proposed device, the energy of the secondary steam is used as much as possible, therefore in the steady state operation of the installation, the consumption of energy supplied to separate the coolant is minimal.

The operation of the film rotary evaporator is associated with the intensive growth of bed scale on the evaporation surface of the apparatus. This leads to a decrease in the heat transfer coefficient and causes

Coolant

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the need for additional costs of heating steam, in addition, the apparatus must be stopped for servicing (flushing the surface), thus losing

thermal energy during cooling and heating of the apparatus.

For efficient condensation of secondary water vapor in the prototype, an additional amount of cooling

water (per 1 ton of steam up to 30 tons of water),

In the proposed device, the energy costs for the disposal of coolant in 2 to 2.5 times lower than in the prototype.

In addition, the proposed installation is more versatile, since it allows a wide range of control of the flow rate of coolant in contrast to the prototype, simplifies the design of the installation, increases reliability, significantly reduces metal consumption and material consumption.

Claims (1)

The invention of the Disposal device for disposal of used coolant fluids containing a collector-drive, a pump, a heater, an evaporator and collectors of the evaporated residue and condensate, characterized in that it is equipped with a superheater of lubricant-cooling liquids, the output of which is connected to nozzles installed in the evaporator, made in the form of a tank, in the upper part of which there is a heat exchanger connected an inlet pipe with a tube space of the heater, and an outlet with a superheater, and an ejector, the mixing chamber of which is located in the annular space of the heater, and the outlet pipes are connected to an evaporator and a condensate collector Ot os About 20 W 60 80 100 G, C 0.02 0.01 1% yPorpoftuHQ M / o / vaA / oz f% three channels mini B-1/0 3% MCS-S%. Mkho-be, go bo bo so yo t ° FIG. g