WO2020071943A1

WO2020071943A1 - Method for operating an apparatus for reclaiming hydraulic and dielectric fluids

Info

Publication number: WO2020071943A1
Application number: PCT/RU2018/000658
Authority: WO
Inventors: Николай Анатольевич ТУЗ; Денис Валерьевич КУРГАНОВ
Original assignee: Общество С Ограниченной Ответственностью "Наука И Практика"
Priority date: 2018-10-02
Filing date: 2018-10-04
Publication date: 2020-04-09

Abstract

The invention relates to methods for operating apparatus for purifying hydraulic and dielectric fluids. The apparatus of interest is activated in an automatic mode, frequency converters and the level of oil in a tank are checked, a vacuum pump is switched on, and air is pumped out of the vacuum tank. If the vacuum is not satisfactory, the apparatus is switched off, the integrity of the pneumatic system is checked, and a return to a baseline algorithm is effected. A feed pump is switched on and initial filling of the tank is carried out. If the tank is not filled to the necessary level, the apparatus is switched off, the integrity of the hydraulic system is checked, and a return to the baseline algorithm is effected. Next, the working of a discharge pump is checked. When a given fluid level is reached in the tank, the discharge pump is switched on in a self-adjusting mode. The stability of the apparatus in terms of certain parameters is checked, electric filters are switched on, and a normal operating mode for maintaining the parameters is activated. After all of the fluid has been pumped out of the tank, the discharge pump is switched off, the vacuum pump is switched off, and the electric filters are switched off. This increases the fail-safety of the apparatus, and provides a simple and accurate operating algorithm.

Description

METHOD OF OPERATION INSTALLATION FOR RESTORATION

QUALITY OF WORKING AND DIELECTRIC LIQUIDS

FIELD OF THE INVENTION

The invention relates to methods of operating plants for the purification of working and dielectric liquids (oils and fuels) from mechanical impurities, dissolved and dispersed water, can be used in any field using clean and contaminated dielectric liquids.

State of the art

The prior art installation for cleaning working and dielectric liquids MEFO-200, containing a vacuum chamber, a vacuum pump, pumps for supplying and pumping dielectric liquids, electrostatic precipitators (Ruscable.ru. Articles. Energy. Innovative technologies and equipment for oil cleaning. Publish. 12/29/2011 , https://www.ruscable.ru/article/lnnovacionnye_texnologii_i_oborudovanie/).

The main disadvantage of MEFO-200 is its low fault tolerance, a large number of equipment, requiring unnecessary and inefficient manipulations during operation, causing the complexity and inconvenience of the installation, and low accuracy of the operation algorithm.

Disclosure of Invention

The technical task is to create an automatic method of operating the installation to restore the quality of working and dielectric fluids, which allows to achieve high fault tolerance of the installation, simplicity and accuracy of the operation algorithm.

The technical result is to increase the fault tolerance of the installation, while ensuring the simplicity and accuracy of the operation algorithm

The technical result is achieved due to the fact that the method of operation of the installation for restoring the quality of working and dielectric liquids, containing a vacuum tank with a nozzle, connected to the tank through pipelines, a vacuum pump, pumps for supplying and pumping out dielectric fluid, electrostatic precipitators with high-voltage power supplies, connected through a pipeline with pumping pump contains the following steps:

turn on the installation, select the cleaning and drying mode, enter a personal confirmation code, start the installation in automatic mode;

check frequency converters; check the liquid level in the tank, in this case, if there is liquid in the tank, then it is pumped out, and if the tank is empty or the liquid is pumped out, check all the taps for closing and prepare for start-up;

include a vacuum pump;

they shut off the pressure relief valve and pump out the air from the vacuum tank; in this case, if the vacuum is normal, the inlet and outlet valves are opened, if the vacuum is not normal, the unit is turned off, the integrity of the pneumatic system and the correct operation of the electrical equipment of the pneumatic system are checked, and the transition to the beginning an algorithm to turn on the unit and select a cleaning and drying mode;

then turn on the feed pump and carry out the initial filling of the tank, if the tank is filled to the required level, turn off the feed pump and turn on the pump, and if the tank is not filled to the required level, turn off the unit, check the integrity of the hydraulic system and the correct operation of the hydraulic system equipment and switch to beginning of the algorithm to turn on the unit and select the cleaning and drying mode;

then check the operation of the pump, if the pump has pumped the liquid to the desired level, then the feed pump is started in self-regulation mode, and if the pump has not pumped the liquid to the desired level, then go to the beginning of the algorithm;

upon reaching a predetermined level of liquid in the tank, turn on the exhaust pump in self-regulation mode;

check the stability of the installation according to the parameters

include electrostatic precipitators by applying voltage to their power supplies and checking them;

after checking the electrostatic precipitators, they include the normal mode of maintaining all parameters in a given range;

when receiving a stop command, turn off the feed pump and close the inlet valve;

after pumping out all the liquid from the tank, turn off the pump and close the outlet valve;

after closing the valve, the vacuum pump is turned off, the vacuum is released using the pressure relief valve and the electrostatic precipitators are turned off.

Brief Description of the Drawings

The figure shows a general installation diagram. The implementation of the invention

The claimed method of operation is intended for installations conducting the cleaning and restoration of the quality of working and dielectric fluids operating using vacuum drying and degassing, and electrostatic cleaning.

The figure shows a basic hydro-pneumatic diagram of the installation for restoring the quality of working and dielectric fluids, consisting of taps 1-9, strainer 10, coarse filter 11, feed hydraulic pump 12, pump out hydraulic pump 13, pressure sensor 14, pressure sensor and temperature 15, temperature gauges 16.17, flow meter 18, electrostatic precipitator 19, vacuum tank 20 with nozzle 21, emergency level sensor 22, vacuum sensor 23, vacuum gauge 24, main level sensor 25, leakage regulator 26, k Apaana depressurization 27, air filter 28 vacuum tank respiration, drift eliminator 29, an emergency level sensor 30, the vacuum pump 31.

The dielectric fluid to be treated, for example, oil, is piped through the inlet 1, the strainer 10 and the coarse filter 11 are sucked in by the pump 12 and, by monitoring the pressure, temperature and instantaneous flow rate, the sensors 15, 16 and 18 are fed through the pipeline at a pressure of at least 6 atm. through the bottom inlet to the nozzle 21. The nozzle 21 is located vertically in the tank 20, with the spray up. Due to the vacuum in the tank 20, through the lateral inlet, from the atmosphere through the air filter 28 and the leakage regulator 26 through the pipeline, a predetermined amount of air enters the nozzle 21, regulated by the leakage regulator 26 located on the pipeline. Oil and air enter the mixing chamber of the nozzle 21 and then through the sprayer the resulting mixture is sprayed into the tank 20 in the form of fine oil mist, where vacuum drying and degassing of the dielectric fluid takes place. In the tank 20, using a vacuum pump 31, a pressure of not higher than -0.8 atm is maintained, due to which the mixture is heated and the dispersed and dissolved water evaporates, which is removed by the vacuum pump 31 through a droplet eliminator 29. The balance of the feed is maintained by the vacuum pump 31 and the mixing chamber of the nozzle 21 into the nozzle 21 of air and air removed from the tank 20, enriched with water evaporated from the oil. Thus, watered oil is supplied to the tank inlet, dried oil and moist air are removed, which is removed by the vacuum pump 31. The dried and degassed dielectric fluid is pumped out by the pump 13, maintaining the liquid level in the tank 20 no higher than the nozzle atomizer 21, and controlling the pressure and temperature sensors 14 and 17 through the pipeline is fed to the electrostatic precipitators 19, with which electrostatic cleaning is carried out. Through the inlet pipe, contaminated dielectric fluid (oil, fuel) enters the filter housing 19. The contaminated dielectric fluid passes through the slots of current-carrying plates, it is exposed to electrostatic fields that occur when electricity is supplied to the studs using a high-voltage power supply. Current-carrying plates alternate with each other through one plate and multidirectional voltage is applied to even and odd current-carrying plates. Between all current-carrying plates are dielectric spacers. One of the studs is connected with positive potential, the other with negative. A potential difference is created between the plates. When a voltage of 1250 volts - 4750 volts is applied (depending on the types of pollution or their combination), neutral pollution particles acquire positive and negative charges, are attracted to each other, enlarged and removed from the liquid dielectric stream, deposited and held in the pollution storage cells, formed by current-carrying plates and dielectric spacers. The purified dielectric fluid is discharged from the housing through the corresponding outlet valve, followed by the supply of the liquid purified from mechanical impurities outside the installation.

The vacuum tank 20 can be made in the form of a cylinder, with a constant diameter in height, of, for example, any known metal, including stainless. The upper and lower bottoms can be made both flat and convex (torospherical, elliptical). At the top of the tank may be a defoaming device.

The pressure relief valve 27 serves to quickly equalize the pressure in the vacuum tank 20 in the event of an emergency. The vacuum tank 20 is equipped with a main liquid level sensor 25, a vacuum sensor 23 and a vacuum gauge 24, while the tank 20 and the drip tray 29 are additionally equipped with emergency level sensors 22,30, and a pressure reducing valve 2 is installed between the drip tray 29 and the vacuum pump 31. , the crane 4 of the tank 20, the crane 5 of the coarse filter 11 and the crane 9 of the electrostatic precipitator 19, are drain and are necessary for maintenance and storage of the equipment of the installation. At the same time, cranes 7 and 8 are provided for servicing the electrostatic precipitator 19, which, if necessary, close and manipulate the filter.

During the operation of the claimed installation, the maximum drying and degassing efficiency was achieved with a liquid pressure at the inlet of the nozzle of at least 6 atm., A constant flow rate of liquid (oil) of 2 m3 / h, a temperature of liquid (oil) of 45 - 95 ° C and a vacuum pressure tank not higher than -0.8 atm.

When the fluid pressure at the inlet to the nozzle was less than 6 atm., The nozzle did not enter the mode, not an oil mist formed in the tank, but a coarse suspension, which led to a decrease in the efficiency of drying and degassing. When the fluid pressure at the inlet to the nozzle was 18 atm (the maximum pressure that was tested), the pipelines began to fail, with a significant improvement in the process the formation of oil mist did not occur. With a constant oil flow rate of less than 2 m3 / h, the vacuum pump began to choke with oil and no oil fog was formed in the tank, and with a constant oil flow rate of more than 2 m3 / h, a more powerful vacuum pump with higher productivity was required, which would lead to an increase in size and material consumption. When the temperature of the liquid (oil) was less than 45 ° C, an additional heater was needed to complicate the design, and when the temperature of the oil was above 95 ° C, the oil began to lose its properties and collapse.

The high-voltage power supply creates and holds the magnetic field at a constant level by changing the current strength and voltage. The best results for cleaning dielectric fluids were achieved at voltages between 1250 volts and 4750 volts. When choosing a voltage of less than 1250 volts, the necessary electric field did not arise, the magnetization of impurities was weak, and when choosing a voltage of more than 4750 volts, additional magnetization of impurities and the removal of impurities from the electrostatic precipitator occurred.

The method of operation of the installation is as follows.

The installation is turned on, the cleaning and drying modes are selected, a personal confirmation code is entered, the installation is started in automatic mode, the frequency converters are checked, the liquid level in the tank is checked, and if there is liquid (oil) in the tank, it is pumped out, and if the tank is empty or the liquid is pumped out, check all the taps for closing and prepare for start-up, then turn on the vacuum pump, close the pressure relief valve and pump out the air from the vacuum tank, then, if the vacuum is normal, then open the inlet and outlet valves, if mind is not OK, then the installation is switched off, check the integrity and correctness of the pneumatic system of electrical pneumatic, and transitioning to the beginning of the algorithm to enable installation and mode selection cleaning and drying. If everything is normal, then turn on the feed pump and carry out the initial filling of the tank, if the tank is filled to the required level, turn off the feed pump and turn on the pump, and if the tank is not filled to the required level, turn off the unit, check the integrity of the hydraulic system and correct operation hydraulic system equipment (opening cranes, coarse filter, pump operation, dirt in the nozzle, etc.), and go to the beginning of the algorithm to turn on the unit and select the cleaning and drying mode. If everything is normal, then check the operation of the pump, if the pump has pumped the liquid to the desired level, then the feed pump is started in self-regulation mode, and if the pump has not pumped the liquid to the desired level, then go to the beginning of the algorithm when the set the liquid level in the tank, turn on the exhaust pump in the self-regulation mode, check the stability of the installation by parameters (pressure, temperature, pumping), turn on the electric filters by applying voltage to their pit blocks Ia and perform their check, after checking the electrostatic precipitators, turn on the normal mode of maintaining all parameters in a given range, when receiving a stop command, turn off the feed pump and close the inlet valve, after pumping all the liquid out of the tank, turn off the exhaust pump and close the outlet valve, turn off the vacuum pump after closing the valve, reset vacuum using a pressure relief valve and turn off the electrostatic precipitators.

In any emergency situation, deviation from the given algorithm, from the norms of the sensor readings, the occurrence of any error, the installation notifies you of this, de-energizes (the power to the taps, pumps and other equipment is turned off) and the transition to the beginning of the algorithm is performed, namely, to turn on the installation and choosing a cleaning and drying mode.

The claimed method of operation, allows to achieve high fault tolerance of the installation, an optimized, simple and accurate algorithm for its operation, allows you to effectively restore the quality of working and dielectric fluids, using vacuum drying and degassing, and a controlled electrostatic filter.

Claims

CLAIM

The method of operation of the installation for restoring the quality of working and dielectric liquids, containing a vacuum tank with a nozzle, connected to the tank through the vacuum pump pipelines, dielectric fluid supply and pumping pumps, electrostatic precipitators with high-voltage power supplies, connected through the pipeline to the pumping pump, characterized in that it contains following steps:

check frequency converters;

check the liquid level in the tank, in this case, if there is liquid in the tank, then it is pumped out, and if the tank is empty or the liquid is pumped out, check all the taps for closing and prepare for start-up;

include a vacuum pump;

check the stability of the installation according to the parameters

after checking the electrostatic precipitators, they include the normal mode of maintaining all parameters in a given range; when receiving a stop command, turn off the feed pump and close the inlet valve;