RU153909U1 - TEST STAND FOR SEPARATION EQUIPMENT - Google Patents

Abstract

1. A test bench for separation equipment containing a test separator connected by a drain pipe to a storage tank, a gas injection line into the test separator on which an inlet pressure gauge, a mechanical solids dispenser, a liquid dispenser are installed, and equipped with shutoff valves, a discharge line from the test separator on which an output pressure gauge and an air filter are installed, and equipped with shutoff valves, characterized in that to the gas injection line through the receiver and the air preparation unit, containing a water-oil separator and at least one air filter, a compressor with fixed pressure and capacity values is connected, the inlet pressure gauge is located upstream of the dispensers, the liquid dispenser is located downstream of the mechanical impurities dispenser along the gas. 2. The test bench for separation equipment according to claim 1, characterized in that the compressor is made with automatic control, with stepwise adjustment of pressure and capacity.

Description

The utility model relates to devices for testing separation equipment, in particular to stands for testing gas separators, and can be used to test gas separators designed for gas, oil, chemical and other industries.

From the prior art, stands for testing gas separators are known, for example, according to the invention patent SU No. 1521918 (publ. 15.11.89), the invention patent RU No. 2331861 (publ. 08.20.2008), the invention patent RU No. 2425254 (publ. 07.27.2011), according to the patent for invention No. 2075654 (publ. 03.20.1997), containing a storage tank with a gas-liquid separator connected to it, a pump for supplying a liquid, a system for preparing a gas-liquid mixture, measuring equipment. A common drawback of such stands is their use is limited to testing gas-liquid separators for submersible electric pump units for oil extraction from wells, they are not designed for testing gas separators designed, for example, for separating natural gas, in addition, they do not simulate the conditions of pollution of the separated medium by solid particles, for example, sand.

A known bench for testing compressors with a liquid piston according to the patent for utility model RU No. 71708 (publ. March 20, 2008) is equipped with a test system for separation devices at the outlet of the compressor with a liquid piston containing quick disconnect connections for connecting the test separator to the compressor discharge line and a flow meter for control of the liquid separated by the separator. The disadvantages of such a stand are: bulkiness, the ability to control only the amount of liquid separated by the separator, it does not simulate the conditions of contamination of the separated medium by solid particles, for example, sand, the high cost due to the flow meter included in the stand.

A well-known test bench for centrifugal fuel and oil separators according to GOST 17601-90, including the tested separator connected to the tank for the crude product, a device for introducing a demulsifier, a circulation pump, a device for introducing a pollutant, for example, graphite and red minium iron, an input device water, sampling devices before and after the separator, a device for regulating the capacity, a buffer water tank, a heater, pressure gauges, a flow meter, a tank for purified product, a tank for separated water and ama, pump, etc. The disadvantages of the device are: bulkiness; the quality of the medium’s separation is evaluated by analyzing and comparing the medium’s samples taken before and after the separation, while the samples are taken twice with an interval of at least 1 min. ; the device is not intended for testing gas separators; the disadvantage is also the high cost due to the flowmeter included in the stand.

A known device for testing separation equipment according to the patent for utility model RU No. 146825 (publ. 10/20/2014), including a separation unit connected by a drain pipe to a storage tank, a gas injection unit, a heat exchanger, a control unit designed for the indication received from the temperature sensor installed on the gas injection line, to form control actions for the heat exchanger connected to the flowmeter designed to control the flow of gas entering the separation unit along the gas injection line, on which a liquid dispenser, a mechanical impurity dispenser, as well as an inlet pressure gauge with a pressure supply pipe and a pressure relief pipe equipped with shutoff valves are installed, the outlet of the separation unit is connected to the gas pumping unit equipped with a bypass line through the filter, forming at this suction line on which the output pressure gauge is installed, while the input pressure gauge is installed after the dispensers, and the mechanical impurity dispenser after the water dispenser. The disadvantages of this stand are: the location of the inlet pressure gauge after the dispensers can lead to contamination, while its readings become unreliable, the location of the mechanical impurity dispenser in front of the separation unit can also lead to unreliable test results. With this arrangement of dispensers, when studying the operating mode of separation equipment with simultaneous contamination of the separated medium and liquid and mechanical impurities, dry mechanical impurities can enter the separation unit at the beginning of the experiment, which violates the conditions of the test mode and affects the reliability of the results. The disadvantage is that when using air as a gas, the stand does not provide for its preparation, unprepared air, especially taken in the conditions of a testing station of an industrial enterprise, contains contaminants and moisture, the use of untreated air violates the reliability of the test results. The disadvantage is also the insufficient safety of the stand - in such a stand in an emergency situation, for example, if the pressure in the separation unit is higher than the permissible one, it is impossible to relieve the pressure supplied through the pressure supply pipe completely bypassing the stand, part of the pressure through the jumper will inevitably go to the stand. In addition, such a stand has a high cost due to the flowmeter included in the stand, the cost of which is from 30 to 300 thousand rubles. This technical solution is selected for the closest analogue of the claimed utility model.

The authors were faced with the task of creating a stand design for testing separation equipment devoid of these drawbacks, namely, reducing the cost and simplifying the design by eliminating the use of a flow meter, increasing the reliability of test results, improving the safety of the stand.

To achieve the specified technical result, the stand for testing separation equipment contains a test separator connected by a drain pipe to a storage tank, a gas injection line into the test separator, on which an inlet pressure gauge, a liquid dispenser, a mechanical dosing device are installed, and which is equipped with shutoff valves, a discharge line from the test separator, on which the output pressure gauge, the output filter and which is equipped with shutoff valves, are installed, the stand also contains a bypass line row line and the waste gas discharge line provided with a shut-off valve to the gas discharge line through the receiver and air preparation unit comprising a moisture separator and at least one, preferably two, air filter, a compressor connected with the fixed pressure values and productivity. Moreover, the input pressure gauge is located before the dispensers, the liquid dispenser is located after the dispenser of mechanical impurities along the gas. It is preferable to use a compressor with automatic control, with step-by-step adjustment of pressure and capacity.

The implementation of the stand without a flow meter and associated additional equipment, made it possible to simplify its design and reduce the cost of the stand. This also made it possible to reduce the cost of operation of the stand, as, for example, additional training and certification of employees is required to work with the flowmeter. In this case, the gas flow rate is determined by calculation by known methods, for example, “Method for calculating the consumption of compressed air through emptying the receiver” (http://www.megapascal.ru/info/raschet_rashoda_szhatogo_vozduha/) according to the formula:

where:

L _B - the desired consumption of compressed air, m ³ / min;

V _R - receiver volume, m ³ ;

p _max - pressure at the time of the beginning of measurements, bar;

p _min - pressure at the time the measurement is completed, bar;

t - duration of measurements, min.

The use of a compressor with fixed values of pressure and performance, with automatic control, with step-by-step adjustment of pressure and performance simplifies the testing and monitoring, allows testing in different modes of pressure and performance, increases the reliability of the test results. The fixed values of pressure and compressor capacity make it possible to replace the measurement of gas flow with a flow meter with reliable calculation.

The location of the inlet pressure gauge to the liquid and solids dispensers along the gas eliminated its clogging and thereby increased the reliability of the test results. The use of an air preparation unit containing a moisture separator and at least one, preferably two, air filters for air purification, the use of a receiver that smooths out pressure pulsations from the compressor and ensures uninterrupted supply of compressed air also ensures the reliability of the tests. The location of the liquid dispenser after the mechanical impurity dispenser eliminates the breakthrough of dry mechanical impurities at the beginning of tests in the "liquid + mechanical impurities" mode and increases the reliability of the test results in this mode.

The bypass line between the gas injection line and the discharge line, equipped with shutoff valves, allows in case of exceeding the normalized pressure on the tested separator, opening shutoff valves on it and shutoff shutoff valves on the gas discharge line, relieve pressure on the bench, completely bypassing the tested separator and other equipment stand, thereby ensuring greater safety of the stand compared to the closest analogue.

Distinctive features of the proposed device from the above known, closest to it, is that the stand contains a bypass line between the discharge line and the discharge line, equipped with shutoff valves, to the gas discharge line through the receiver and the air preparation unit containing a moisture separator and at least one, preferably two, air filters, a compressor is connected with fixed values of pressure and performance, the inlet pressure gauge is located up to the dispensers, the liquid dispenser is located ene dispenser after mechanical impurities of gas flow.

The combination of all these features allows you to create a stand design for testing separation equipment, which simplifies and cheapens the design by eliminating the use of an expensive flow meter, increasing the reliability of test results, improving the safety of the stand.

The figure shows a schematic diagram of the stand, where 1 is the tested separator, 2 is the drain pipe, 3 is the storage tank, 4 is the gas injection line, 5 is the stop valve of the gas injection line 4, 6 is the input pressure gauge, 7 is the mechanical impurity dispenser, 8 - liquid dispenser, 9 - discharge line, 10 - shutoff valves of the discharge line 9, 11 - output pressure gauge, 12 - output filter, 13 - bypass line, 14 - shutoff valves of the bypass line 13, 15 - receiver, 16 - air preparation unit, 17 - compressor.

The stand works as follows.

By compressor 17, air is supplied to the air preparation unit 16, consisting of series-connected separator-moisture separator and at least one, preferably two, air filters, where the air is cleaned of possible impurities and moisture that may affect the reliability of the test results, then the air is supplied in the receiver 15, which smooths out the pressure pulsations from the operation of the compressor 17, accumulates compressed air, ensuring an uninterrupted supply of compressed air. After the compressor 17 reaches the required pressure and capacity conditions for testing, the compressed air enters the gas injection line 4, where mechanical impurities and liquid, or only mechanical ones, are supplied through the mechanical impurity dispenser 7 and the liquid dispenser 8, depending on the type of test impurities, or just liquid. After each test mode, the stand is purged. Water can be used as a liquid, fractionated sand can be used as mechanical impurities. The resulting mixture enters the test separator 1, the air separated in the separator 1 enters the atmosphere through the discharge line 9, before passing through the outlet filter 12 and is finally cleaned of impurities, and the impurities detained in the separator 1 pass through the drain pipe 2 of the separator 1 into the storage tank 3. Pressure control is carried out by an inlet pressure gauge 6 installed on the gas injection line 4 to the contaminants and an outlet pressure gauge 11 installed after the separator 1 to the outlet filter 12, the pressure separator 1 is also controlled by a pressure gauge (not shown) mounted directly on the separator 1. The air flow supplied to the separator 1 is calculated by the method of the above or other known methods.

The determination of the amount of entrainment of liquid is defined as the difference between the volumes of the fluid that entered the separator 1 through the fluid meter 8 and the fluid that enters the storage tank 3. The determination of the amount of entrainment of mechanical impurities is determined by the mass of mechanical impurities detained in the output filter 12.

Stop valves 5, 10, 14 on the gas injection line 4, discharge line 9 and bypass line 13 allows you to adjust the operation of the stand in different modes. For example, before starting the test, the shutoff valves 14 on the bypass line 13 are opened in series, the shutoff valves 5, 10 on the discharge line 4 and the discharge line 9 are closed, the compressor 17 is started, the required operation mode of the compressor 17 is set in accordance with the required test mode of the separator 1. Then, the shutoff valves 10 on the discharge line 9 are opened, the shutoff valves 5 on the gas injection line 4 are opened, the shutoff valves 14 on the bypass line 13 are closed. The entire volume of air is sent to the separator 1. In addition to Moreover, the bypass line 13 between the gas injection line 4 and the discharge line 9, equipped with shutoff valves 14, allows, in case of exceeding the normalized pressure on the tested separator 1, by opening the shutoff valves 14 to relieve pressure on the bench, while closing shutoff valves 5 on the gas injection line 4, the pressure on the stand is stopped, thereby ensuring the safety of the tests.

The claimed technical solution of the test bench for separation equipment can be implemented in industrial production using standard equipment and technology. In the manufacture of the stand, standard metal rolling and metal structures, standard pipe fittings, standard measuring instruments, and compressor equipment available on the market are used.

The authors developed a stand that was successfully implemented at the manufacturing facility of the developer, the stand used a DEN-55Sh compressor with fixed values and step-by-step pressure and capacity control, with an automatic control system that provides input of operation parameters and control of all installation operation parameters. The air preparation unit consists of a series-connected separator-dehumidifier of type СЦ 1260Р and two main-air filters of the ФВ series, a receiver of type РВ-900-10 is also used, the output filter can be an air and / or separator-dehumidifier. The compressor characteristics are presented in the table.

Claims (2)

1. A test bench for separation equipment containing a test separator connected by a drain pipe to a storage tank, a gas injection line into the test separator on which an inlet pressure gauge, a mechanical solids dispenser, a liquid dispenser are installed, and equipped with shutoff valves, a discharge line from the test separator on which an output pressure gauge and an air filter are installed, and equipped with shutoff valves, characterized in that to the gas injection line through the receiver and the air preparation unit, containing water separator and at least one air filter, a compressor with fixed pressure and capacity values is connected, the inlet pressure gauge is located upstream of the dispensers, the liquid dispenser is located downstream of the mechanical impurities dispenser along the gas. 2. A test bench for separation equipment according to claim 1, characterized in that the compressor is made with automatic control, with step-by-step adjustment of pressure and capacity.

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