EA016667B1 - Method and apparatus for purifying shale oil from solid impurities - Google Patents

Abstract

The invention is provided for purifying shale oil from solid impurities which have remained in the oil after thermal processing of oil shale. First subject of present invention is a method of purifying shale oil, according to which a composition to be purified is prepared from heavy and medium-light fractions of shale oil and petrol, after which a cyclical purifying process of said composition is carried out. During each cycle said composition is first filtered and the cycles are repeated until to the moment when the effectiveness of filtering becomes lower than required. When this happens, the filter is drained from the composition to be purified and filter cartridges are cleaned.; Depending on the percentage of shale oil in a layer built up on cartridges they shall be either only dried using an inert gas having high temperature, after which they are subjected to pneumatic impacts or the above described procedure is preceded by washing of the filter cartridges with petrol. When filter cartridges have been cleaned, an analogous purification cycle follows. Second subject of present invention is an apparatus by means of which it is possible to carry out the above described method.

Description

The invention relates to the field of chemical industry and involves the thermal processing of shale oil, and more specifically, the invention is intended to clean shale oil from the solid particles present in it.

The level of technology

The shale oil obtained by thermal processing of shale largely contains solid particles, which are particles of shale, ash, and semi-coke. Their presence in shale oil complicates its further processing, during which the necessary fractions are extracted from shale oil. The harmful effects of solid particles are manifested primarily in the fact that they clog up the equipment used and contribute to the erosion of the surfaces in contact with them. Therefore, it is very important to clean the shale oil from solid particles before its further processing.

In the prior art, various methods and equipment are known for cleaning shale oil from solid particles present in it.

For example, a method of shale oil purification from solid particles is known, which involves setting shale oil in appropriate containers. The process is time consuming and long, while it helps to remove solid particles, primarily from the medium-light fraction of shale oil, but using the method to remove solid particles from the heavy fraction does not give a significant effect (see N.I. Zelenin, V.S. Fainberg, K. Chernysheva, Chemistry and Technology of Shale Resin (Chemistry Publishing House, Leningrad Branch, 1968, p. 186).

Also known is the method of purification of shale oil from solid particles by centrifugation, but this method does not provide sufficiently pure shale oil, in addition, the process is very energy-intensive (see N.I. Zelenin, V.S. Faynberg, K. B. Chernysheva. Chemistry and technology of shale tar. Chemistry Publishing House, Leningrad Branch, 1968, p. 187).

For purification of shale oil from solids, they tried and filtered it, but did not get satisfactory results. Shale oil, primarily due to the high viscosity of its heavy fraction, creates a dense layer on the filtering surface, clogs the filters and prevents further process, which is why well-known filtration solutions are generally not suitable for cleaning a heavy fraction of shale oil (see N. I. Zelenin, VS Faynberg, K. B. Chernysheva (Chemistry and Technology of Shale Resin. Chemistry Publishing House, Leningrad Branch, 1968, p. 188).

Also known is the method of purification of shale oil from solid particles, in which a heavy fraction of shale oil is mixed with gasoline, the resulting mixture is defended in a decanter for the required time, after which the settled mixture is sent further to the heat sink, where it is also defended for the required time. Then, the heavy fraction purified in this way is mixed with the medium-light fraction, and this mixture is in turn mixed with phenolic water in a mixer and sent to the next heat sink, where after settling for a specified time, purified shale oil is obtained and the phenolic water is released (described method is used by an Estonian company VKG OIL JSC in Kohtla-Järve, Estonia).

The described method allows to use a heavy fraction of shale oil in the cleaning process, but the following circumstances can be attributed to the disadvantages of the method:

first, to implement the method, very capacious equipment is required (decanter, thermo-sedimentation tanks), which is why large production areas are required to use the method;

secondly, when shale oil is cleaned by a known method, a fairly significant volatilization of the light fraction from the mixture (gasoline) occurs during work, which significantly increases production losses;

thirdly, in addition to the removed solid particles, the residual products obtained during the purification process also contain large quantities of the mixture to be cleaned, for example, the residual product at the outlet of the second thermal sump contains 85-90% of the mixture to be cleaned and water. The processing of such residual products requires additional costs, which also increases the cost of the process;

Fourth, the cleaning process is time consuming.

In the prior art, equipment for shale oil purification is known, in which the exits of heavy fraction tanks and gasoline are connected to the inlet of the first diaphragm mixer, its output is connected to the inlet of the decanter, and the outlet to the first thermal sump. The output of the first thermo-sedimentation tank and the outlet of the phenolic water tank are connected to the inlet of the second diaphragm mixer, to which the tank outlet of the light fraction is also connected. The output of the second diaphragm mixer is connected to the input of the second heat sink. Purified shale oil is discharged through one of the outlets of the second heat sink, and separated phenolic water through the second. Both the decanter and the two heat sinks have additional outputs for the removal of residual product (the equipment described is used by the Estonian company VKG OIL JSC in Kohtla-Järve, Estonia).

The disadvantages associated with the installation and use of the described equipment, coincide with the disadvantages of the already described known method.

- 1 016667

The purpose and essence of the invention

The first aim of the invention is to improve the method of purification of shale oil from solid particles in such a way as to make the cleaning process more efficient, reduce the amount of equipment used, reduce the amount of residues arising during the cleaning process, direct them back to the process, but also reduce the solids content in refined shale oil, which is sent for further distillation, which makes it possible to obtain better products by further distillation process.

The goal of the invention is achieved by the first alternative solution, according to which the heavy and light medium fractions of shale oil are used to make the mixture to be cleaned, and then the process of cyclic cleaning of this mixture is carried out, where each process cycle includes the following steps:

pressurized cleaned mixture is pumped into the tank to remove solid particles;

the purified mixture of fractions of shale oil coming out of the tank to remove solids is collected in the container of the finished product;

The tank for removing solid particles is cleaned of the particles remaining there, for which this tank is emptied of the mixture being cleaned, and then solid particles are removed from the empty tank, and the mixture being cleaned is prepared by simultaneously mixing 0.5-1.0 vol. the proportion of the heavy fraction of shale oil, 1.0-2.0 vol. fractions of the lung fraction and 0.7-1.4 vol. share of gasoline;

the mixture being cleaned is heated before entering the separation tank to a temperature of 60-70 ° C; separation capacity is a filter containing at least two filter elements; the cleaned mixture is introduced into the separation tank under a pressure of 1.5-2 bar;

the purified mixture is removed through the outlets of the filter elements into the container of the finished product; to empty the filter from the mixture being cleaned, an inert gas is injected into it under pressure;

after emptying the filter, the solid particles remaining on the surface of the filter elements are dried with an inert gas;

after drying the filtering elements inside the filter, by abrupt changes in the pressure of the inert gas, pneumatic blows are created, with the result that the dry solid particles are released from the surface of the filtering elements and fall into the lower part of the filter;

dry solids are removed from the bottom of the filter.

According to the second alternative solution of the invention, the mixture to be cleaned is prepared from a heavy and light medium fraction of shale oil, and then a cyclic mixture cleaning process is carried out, where each process cycle includes the following steps:

the purified mixture is pumped under pressure into the solid particles separation tank;

the purified mixture of fractions of shale oil coming out of the tank for separating solid particles is collected in the container of the finished product;

the capacity of separating solid particles is cleaned from the solid particles remaining in it, for which it is freed from the mixture being cleaned, and then solid particles are removed from the empty separation container, and the mixture to be purified is prepared by simultaneous mixing 0.5-1.0 vol. the proportion of the heavy fraction of shale oil, 1.0-2.0 vol. fractions of the lung fraction and 0.7-1.4 vol. share of gasoline;

the mixture being cleaned is heated before pumping into a separation tank to a temperature of 6070 ° C;

separation capacity is a filter containing at least two filter elements; the cleaned mixture is introduced into the separation tank under a pressure of 1.5-2.5 bar;

the purified mixture is removed through the outlets of the filter elements into the container of the finished product; to empty the filter from the mixture being cleaned, an inert gas is fed into it under pressure;

after emptying the filter, inert gas is removed from there and gasoline is fed into the filter and gasoline is circulated through the filter elements;

at the end of the circulation, the remaining gasoline in the filter is sent back to the gasoline tank;

after emptying the filter, the solid particles remaining on the surface of the filter elements are dried with an inert gas;

after drying the filter elements inside the filter, by abrupt changes in the pressure of the inert gas, pneumatic blows are created, with the result that the dry solid particles are released from the surface of the filter elements and fall into the lower part of the filter;

dry solids are removed from the bottom of the filter.

For the preparation of the mixture being cleaned, gasoline derived from shale oil is used. Nitrogen is used as inert gas.

The temperature of the inert gas sent to the filter is 50-90 ° C.

The circulation of gasoline through the filter elements is carried out for 10-20 minutes from the gasoline tank through the filter elements and back into the gasoline tank.

The inert gas used in the filters is cleaned of oil vapors dissolved in it and sent for reuse, and the oil vapors are condensed and sent back to their eyes.

- 2,016,667 mixture to be dispensed.

The second aim of the invention is the creation of equipment for the implementation of the invented method, which would be less capacious than in the known solution, and the use of which would avoid the disadvantages of the known method.

The second objective of the invention is achieved by the fact that the equipment for purification of shale oil from solid particles includes an installation for preparing the mixture of shale oil fractions to be cleaned, the capacity for separating solid particles from the prepared mixture and the capacity of the finished product, and the installation for preparing the mixture to be purified includes gasoline tanks, heavy and light medium fractions of shale oil and a mixer connected to them, the output of which is connected to the inlet of the container of the mixture being cleaned;

separation capacity is a filter containing at least two filter elements;

the outlets of the filter elements form the outlet of the filter, which through the valves is connected to the tank of purified shale oil and the gasoline tank;

the equipment additionally contains a source of inert gas provided for providing an inert gas cleaning process, which includes an inert gas tank and a condenser, the latter is designed to remove shale oil fractions dissolved there from the inert gas;

the output of the inert gas tank and the condenser inlet through the valves are connected to the filter, one condenser outlet through the pump is connected to the inert gas tank inlet, and the second condenser outlet through the valve is connected to the light fraction of the tank;

output of the mixture to be cleaned through the pump and connected in parallel to the pump valve connected to the filter inlet;

the output of the gasoline tank through the pump is connected to the filter inlet;

the outputs of the filter elements of the filter are connected for parallel operation.

Brief Description of the Drawings

The invention is illustrated by drawings, where in FIG. 1 is a flow chart of an embodiment of the method of the invention;

in fig. 2 is a schematic diagram of an installation for shale oil purification from solid particles. Arrows on the valves shown in the diagram indicate the direction in which the material in the pipeline moves when the corresponding valve is open.

Detailed description of the invention with examples of execution

The shale oil is removed from solid particles in accordance with the present invention as follows.

First of all, prepare the mixture being cleaned, for which both fractions of shale oil and gasoline are mixed in the following volume ratios: 0.5-1.0 vol. the proportion of the heavy fraction of shale oil, 1.0-2.0 vol. fractions of the light fraction of shale oil and 0.7-1.4 vol. share of gasoline. Tests made by the customer indicate that this ratio of components ensures the best filtration effect. Mixing is performed without heating the components, preferably in a diaphragm mixer. After mixing the mixture is heated to a temperature of 6070 ° C and sent to the intermediate storage, which is the capacity of the mixture being cleaned.

The further cleaning process occurs cyclically, in the form of a sequence of identical cycles. The cyclical nature of the process is due to the fact that the efficiency of the filter used to remove solid particles decreases during the course of the work, due to which the filter must be cleaned.

The first stage of the cycle is to fill the filter with the mixture to be cleaned, for which the mixture is pumped into the filter under a pressure of 1.5-2.5 bar. When the filter housing is filled, the mixture begins to be filtered through the filtering elements, and the cleaned mixture is sent to the tank of purified shale oil.

A similar filtering process lasts as long as filtering ceases to be effective. With a significant decrease in filtration efficiency, pumping the mixture into the filter is interrupted and inert gas (nitrogen) under a pressure of at least 2.5 bar and at a temperature of 50-90 ° C is directed to it, as a result of which the mixture in the filter is forced back into the container of the mixture being cleaned, and filter housing is empty.

After emptying the filter housing, the filter elements are cleaned, for which two alternative methods are possible, depending on how large the specific weight of the mixture being cleaned in the layer of the mixture being cleaned and the filtered solids accumulated on the filter elements are.

In the first case, if the specific gravity of the mixture being cleaned in the layer accumulated on the filter surface of the elements is up to 30%, then nitrogen is circulated through the filter for 10–20 minutes, resulting in solid particles deposited on the filter surfaces of the elements inside the filter, dry out.

After the filter is dried inside the filter, pneumatic shocks are created by abruptly changing the pressure of nitrogen, as a result of which solid particles deposited on the filter elements fall into the lower part of the filter, from where they are removed.

The filter is emptied of nitrogen, and the next filtration cycle begins.

- 3 016667

In the second case, if the specific gravity of the mixture being cleaned in the layer gathered on the filtering surface of the elements exceeds 30%, only drying with nitrogen and subsequent cleaning with pneumatic impact may be insufficient. In a similar case, similarly to the above, the filter housing is emptied, but then the filter elements are washed with gasoline, for which gas is fed into the filter at normal temperature and under a pressure of 2-3 bar and after filling the filter with gasoline, gasoline is circulated through the filter elements. The duration of such circulation can be from 8 to 15 minutes.

After cleaning the surface of the filter elements from a mixture of shale oils, the circulation of gasoline is stopped and the filter housing is emptied of gasoline, for which the remaining gasoline is sent back to the gasoline tank.

Further purification of the filter is similar to the first alternative: nitrogen is sent to a filter housing at a pressure of at least 2.5 bar and at a temperature of 50-90 ° C and nitrogen is circulated through the filter for 10-20 minutes, resulting in dry particles that have settled inside filter on the surface of the filter elements, and then inside the filter, by abrupt changes in the pressure of nitrogen, pneumatic shocks are created, as a result of which solid particles deposited on the filter elements fall into the lower part of the filter, from where they are removed. The filter is emptied of nitrogen, and a new filtration cycle begins.

The equipment for purification of shale oil from solid particles consists of four main devices - device 1 for preparing the mixture of shale oil fractions to be cleaned, device 2 for introducing the prepared mixture into the filter, filter device 3 and source of inert gas.

The device 1 for preparing a mixture of fractions of shale oils includes a tank of 101 gasoline, a tank of 102 heavy fractions of shale oil and a tank of 103 light fractions of shale oil, as well as a mixer 104, to the inlet of which are connected the outlets of all three above-mentioned tanks. These connections are made through valves 105, 106 and 107, controlling which (since the valve control device is not an object of the invention, it is not shown in the drawings), it is possible to meter the components to be mixed.

The device 2 of the input of the prepared mixture into the filter includes a tank 201 of the mixture being cleaned, the inlet of which is connected to the outlet of the mixer 104, the outlet of the tank 201 is connected to the inlet of a parallel circuit including a pump 202 and a valve 203. The device 2 also includes a pump 204 installed between the output parallel chains and tanks 101 gasoline, as well as a valve 205, installed between the output of the parallel circuit and the input tank 101 gasoline.

The filter device 3 includes a filter 301, a container of 302 filtered solids placed beneath it and a container of 303 purified shale oil. The filter consists of a vertical, preferably cylindrical body 304, the lower part of which is tapered to collect solid particles and equipped with a relief valve 305, which is opened and closed by an actuating unit 306. Vertical filter elements 307 are placed in the cylindrical body 304, the number of which may vary depending on the required performance filtering device. Each filter element 307 is a perforated tube covered outside with filter cloth. The outputs of all filter elements 307 are connected together (all filter elements work in parallel) and form the output 308 of the filter 301 located in the upper part of the body 304 and through valves 309 and 310 connected respectively with a capacity of 303 purified shale oil and a capacity of 101 gasoline. Inlet 311 of the filter 301, located in the lower part of the housing 304, is connected to the output of a parallel circuit including pump 202 and valve 203, and through pump 204 to the output of petrol tank 101 and through valve 205 to the input of petrol tank 101. Conclusion 312 of the filtering device 3 is connected to an inert gas source 4.

The inert gas source 4 includes a compressed inert gas tank 401, a condenser 402 and a pump 403. A pump 403 is placed between one outlet of a condenser 402 and an inlet of a compressed inert gas tank 401 and is provided for pumping the inert gas separated in the condenser 402 back to the tank 401. The output of the tank 401 through the valve 404 is connected to the output 312 of the filter 301, and the input of the capacitor 402 is connected via serial valves 405 and 407 to the output 312 of the filter 301, additionally the input of the capacitor 402 is connected to the output 308 of the filter 301 via the valves 405 and 408. The second output The condenser 402 is connected via valve 406 with a capacity of 103 medium lightweight fractions.

The described equipment works as follows.

The components in the tank 101 of gasoline, in the tank 102 of the heavy fraction and in the tank 103 of the medium-light fraction, are metered through the open valves 105, 106 and 107 into the mixer 104 in the ratio described above. As a result of mixing in the mixer 104, the purified mixture is obtained, its temperature is raised to 60-70 ° C and the purified mixture prepared in this way is sent to the container 201. The process of preparing the purified mixture is not uniquely associated with the mixture cleaning cycles. The criterion of its preparation is the constant provision of the required level of the mixture in the tank 201.

At the beginning of the mixture cleaning cycle, pumps 204 and 403 are turned off, valves 203, 205, 310, 404, 405 and 406, 407 and 408 are closed, valve 309 is opened and pump 202 is started, as a result of which the filter 301 begins to fill with the mixture being cleaned. When filling the filter 301, the pressure of the mixture in the filter 301 is

- 4 016667 em 1.5-2.5 bar, and the mixture to be cleaned begins to be filtered through the filtering elements 307, and the clean mixture that passed through them is directed through the open valve 309 into the container 303 of purified shale oil.

If during filtration, a layer of the mixture to be cleaned and solid particles of such thickness that a further filtration is impractical emerges on the filter elements 307, stop the supply of the mixture being cleaned to the filter 301 by stopping the pump 202 and close the valve 309. Then open the valves 203 and 404, resulting in in a container 401 under a pressure of at least 2.5 bar and a temperature of 50-90 ° C, nitrogen enters the filter 301 through the open valve 404 and displaces the mixture to be cleaned there, which through the open valve 203 is sent back to the tank 201 points aemoy mixture.

When the filter 301 is empty of the mixture being cleaned, the valve 203 is closed, and the filter elements 307 should be cleaned, for which the described equipment is provided with two possibilities.

If the specific gravity of the mixture being cleaned in the layer accumulated on the filter surfaces of elements 307 and consisting of the mixture being cleaned and solid particles is up to 30%, nitrogen is circulated through the filter 301 within 10-20 minutes, for which the valve 404 is left open and further opened valves 405 and 408 (valve 407 is already pre-closed). As a result, nitrogen under pressure of at least 2.5 bar and a temperature of 50-90 ° C begins to circulate from the nitrogen reservoir 401 through valve 404, filter 301 and valves 408 and 405 to condenser 402, drying the solid particles on the filter surface of elements 307. Similar circulation is carried out for 10-20 minutes After that, the filter is emptied of nitrogen, for which the valves 404 and 408 are closed and the valves 405 and 407 are opened, as a result of which nitrogen, due to its high pressure and low pressure in the pipes, enters the condenser 402, and normal pressure is restored in the filter 301.

In the emptied filter 301, pneumatic shocks are carried out by abrupt nitrogen pressure changes, for which valves 405 and 407 are closed, and valve 404 is opened for a short time completely, which is why the pressure in the filter rises to a maximum in a short time. Upon reaching the maximum pressure in the filter 301, valve 404 closes, and for a short time, valves 405 and 407 fully open, with the result that nitrogen, due to its excessive pressure and low pressure in the pipes, enters the condenser 402, the pressure in filter 301 abruptly drops, and then normal pressure is restored in filter 301.

The described blows repeat the required number of times, as a result of which dried particles settled on the surface of the filter elements 307 fall into the lower conical part of the filter housing 304 on the relief valve 305, which is opened and closed by means of the actuating unit 306. When there is a sufficient number of particles on the relief valve 305, open and filtering residues fall into the container 302, after which the dump valve 305 is closed. After cleaning the filter 301 it is set to normal pressure.

After cleaning the filter elements, the valves 404, 405 and 407 are closed (the valve 408 was closed earlier), the valve 309 is opened, and the pump 202 is started, and a new filtration cycle begins.

If the specific gravity of the mixture being cleaned in a layer that has settled on the filtering surfaces of elements 307 and consisting of the mixture being cleaned and solid particles is more than 30%, then drying the filter elements 307 with nitrogen alone is not enough to clean them. In this case, an alternative option is used, according to which, after emptying the filter 301 from the mixture being cleaned, the valve 404 is closed, and valves 405 and 407 are opened and the pump 204 is started. The gasoline pumped last into the filter 301 of normal temperature displaces nitrogen from there, which through open valves 405 and 407 enters the capacitor 402.

After filling the filter 301 with gasoline, the valves 405 and 407 close and open the valve 310, which starts the circulation of gas through the filter 301 in a circle: tank 101, pump 204, filter 301, filter elements 307, valve 310, tank 101. The circulation of gasoline lasts 8-15 minutes, and during circulation the oil adhering to them is washed off from the surface of the filter elements 307. To complete the circulation stop the pump 204, open the valves 404 and 205, because of which the nitrogen supplied under pressure to the filter 301, displaces the remaining gasoline in it back to the tank 101.

After emptying the filter 301, the valve 205 is closed and nitrogen is circulated through the filter 301 for 10-20 minutes, for which the valves 405 and 408 are opened (the valve 404 was already opened in advance), and the valve 407 is closed. As a result, nitrogen under pressure of at least 2.5 bar and a temperature of 50-90 ° C begins to circulate from the tank 401 of nitrogen through the filter 301, filter elements 307 and valves 408 and 405 to the condenser 402, drying the solid particles on the surface of the filter elements 307 Such circulation is produced within 10-20 minutes. After that, the filter 310 is emptied of nitrogen, for which the valves 404 and 408 are closed and the valves 405 and 407 are opened, due to which nitrogen, due to its high pressure and low pressure in the pipes, enters the condenser 402, and the pressure in the filter 301 is normalized.

In the empty filter 301, by means of abrupt changes in the pressure of nitrogen, pneumatic shocks are created, for which the valves 405 and 407 are closed, and the valve 404 is opened for a short time completely, as a result of which the pressure in the filter rises instantly to the maximum value. When the maximum pressure is reached, the valve 404 closes and fully opens the valves 405 and 407 for a short time,

- 5 016667 as a result of which, due to its own high pressure and low pressure in the pipes, it enters the condenser 402, the pressure in the filter 301 drops abruptly, and then the normal pressure is restored.

The described blowers produce the required number of times, as a result of which dried particles deposited on the surface of the filter elements fall into the lower conical part of the filter housing 304 on the relief valve 305, which is opened and closed by means of the actuating unit 306. When a sufficient number of particles collect on the relief valve 305 and filtering residues fall into the container 302, after which the dump valve 305 is closed. After cleaning the filter 301 it is set to normal pressure.

After cleaning the filter elements 307, valves 404, 405 and 407 are closed (valve 408 was closed earlier), and pump 202 is also started up, which is how a new filtration cycle begins.

The nitrogen used in the filter 301 for emptying and drying, which through valves 405, 407 and 408 is sent to the condenser 402, includes vaporous shale oil. In condenser 402, shale oils are released from nitrogen, after which the condensed shale oil is sent back to the refining process, for which purpose open valve 406, which directs the condensed shale oil to a capacity of 103 light-medium fractions. Purified nitrogen pump 403 pumped back into the tank 401 nitrogen.

The invention is not exhausted by the application described above, but covers all covered by the claims and equivalent applications.

List of symbols on the chart

- Installation of the preparation of the mixture of shale oil fractions being cleaned;

101 - petrol capacity;

102 - capacity of heavy fraction of shale oil;

103 - capacity of the light fraction of shale oil;

104 - mixer;

105 valve;

106 valve;

107 valve;

- installation of the input into the filter of the prepared cleaned mixture;

201 - capacity of the mixture being cleaned;

202 - pump;

203 - valve;

204 - pump;

205 - valve;

- installation of filtering;

301 - filter;

302 - capacity of filtered solids;

303 - capacity of refined shale oil;

304 - filter housing;

305 - reset valve;

306 - executive node;

307 - filter element;

308 - filter output;

309 valve;

310 - valve;

311 - filter input;

312 - output from the filter;

- source of inert gas;

401 — capacity of compressed inert gas (nitrogen);

402 - capacitor;

403 - pump;

404 - valve;

405 - valve;

406 - valve;

407 valve;

408 - valve.

Claims (10)

CLAIM 1. The method of purification of shale oil from solid particles, according to which the mixture to be cleaned is prepared from the fractions of shale oil, and then the process of purification of this mixture is carried out, characterized in that - 6 016667 the cleaning process consists of identical consecutive cycles, where during each cycle the cleaned mixture is introduced into the solid particles separation tank; the pure mixture of shale oil fractions coming out of the solid particles separation tank is collected in the finished product tank; The solid particles separation tank is cleaned from the solid particles remaining in it, for which it is emptied of the mixture being cleaned, and then solid particles are removed from the empty solid separation tank, while the mixture being cleaned is prepared by simultaneously mixing 0.5-1.0 vol. the proportion of the heavy fraction of shale oil, 1.0-2.0 vol. fractions of the lung fraction and 0.7-1.4 vol. share of gasoline; Before introducing solid particles into the tank, the mixture to be purified is heated to a temperature of 60-70 ° C; A filter containing at least two filter elements is used as a solid particle separation tank; the cleaned mixture is introduced into the tank for separation of solid particles under a pressure of 1.5-2.5 bar; the cleaned mixture is brought out through the outlets of the filtering elements, through the pipeline connected to the container of the finished product; to empty the filter from the mixture being cleaned, inert gas is injected into the filter under pressure; after emptying the filter from the mixture being cleaned, the solid particles remaining on the surface of the filter elements are dried with an inert gas; to remove solid particles from the surface of the filter elements inside the filter, after the filter elements are dried, pneumatic shocks are produced; dry solids are removed from the bottom of the filter. 2. The method of purification of shale oil from solid particles according to claim 1, characterized in that after emptying the filter from the mixture being cleaned and prior to the implementation of pneumatic impact inside the filter to remove solid particles from the surface of the filter elements, gasoline is sent to the filter and gasoline is circulated through the filter elements; at the end of the circulation, the remaining gasoline in the filter is sent back to the gasoline tank; after emptying the gasoline filter, solid particles remaining on the surface of the filter elements are dried with an inert gas. 3. The method of purification of shale oil from solid particles according to claim 1, characterized in that for the preparation of the mixture being cleaned use gasoline derived from shale. 4. The method of purification of shale oil from solid particles according to claim 1, characterized in that nitrogen is used as inert gas. 5. The method of purification of shale oil from solid particles according to claim 1, characterized in that the pressure of the inert gas sent to the filter is at least 2.5 bar and the temperature is 50-90 ° C. 6. The method of purification of shale oil from solid particles according to claim 2, characterized in that the circulation of gasoline through the filter elements is carried out for 9-14 minutes 7. The method of purification of shale oil from solid particles according to claim 2, characterized in that the gasoline circulates through the filter elements from the gasoline tank through the filter elements back into the gasoline tank. 8. The method of purification of shale oil from solid particles according to claim 1, characterized in that the inert gas used in the filters is cleaned of resin vapors dissolved in it and sent back for reuse, and the resin vapors are condensed and sent back to the mixture being cleaned. 9. Equipment for the implementation of the method of purification of shale oil from solid particles according to claim 1, including the installation for preparing the mixture of shale oil fractions to be cleaned, the installation for separating solid particles from the mixture being cleaned and the capacity of the finished product, characterized in that the installation for preparing the mixture to be purified includes in itself the capacity of gasoline, the capacity of heavy and light medium fractions of shale oil and the mixer connected to them, the output of which is connected to the input of the container of the mixture being cleaned, the capacity of solid particles separation is There is a filter containing at least two filter elements; the outlets of the filtering elements are the outlet of the filter, which is connected through valves to the tank of purified shale oil and to the tank of gasoline; the equipment includes an inert gas source provided for providing an inert gas cleaning process and including an inert gas tank and a condenser; the output of the inert gas tank and the condenser inlet through the valves are connected to a filter; one outlet of the condenser through the pump is connected to the inlet of the inert gas tank; the second outlet of the condenser through the valve is connected to the capacity of a light fraction; the output of the mixture to be cleaned through the pump and in parallel with it the connected valve is connected to the filter inlet; - 7 016667 output of gasoline tank through the pump is connected to the input of the filter. 10. Equipment according to claim 9, characterized in that the outputs of the filter elements are connected in parallel with respect to the output of the filter.