RU112369U1 - DEVICE FOR PREPARATION OF ASSOCIATED OIL GASES - Google Patents

Abstract

1. A device for the preparation of associated petroleum gases, containing a gas circuit and switchable freezers, characterized in that it additionally contains a refrigeration circuit and a coolant circulation circuit, and the gas circuit contains a series-connected cooled recuperator circuit, a first stage separator, parallel-connected freezers, parallel-connected separators second stage, heated re-heater circuit, heated recuperator circuit. ! 2. A device for the preparation of associated petroleum gases according to claim 1, characterized in that the refrigeration circuit is closed and contains a series-connected receiver for a refrigerant, a compressor, an oil separator, an air-cooled condenser, a cooled heat exchanger-condenser circuit, an intermediate receiver and a choke, while to the outlet for the refrigerant from the oil separator are additionally connected in series with the heat exchange circuits of the freezers, the heat exchange circuits of the second stage separators and the refrigerant collector connected to the receiver for the refrigerant, and the receiver for the refrigerant is additionally connected to the heat exchange circuits of the second stage separators. ! 3. A device for the preparation of associated petroleum gases according to claim 1, characterized in that the coolant circulation loop is closed and contains a series-connected reservoir for the coolant, a pump, a heated heat exchanger-condenser loop and a cooled heater loop. ! 4. The device for the preparation of associated petroleum gases according to claim 1, characterized in that the gas circuit additionally contains sensors located at the inputs

Description

DEVICE FOR PREPARATION OF ASSOCIATED OIL GASES

F25J3 / 08

B01D53 / 26

A device for the preparation of associated petroleum gas refers to a device for low-temperature gas processing and can be used for the preparation of associated petroleum gas before transportation to consumers.

The well-known “INSTALLATION OF GAS DRYING” according to patent RU 2412746 dated 04.02.2009, published on 08/10/2010, IPC B01D 53/26, containing a moisture separator for preliminary moisture separation, a moisture separator for additional moisture separation, a vortex tube, an ejector and a heat exchanger connected to this moisture separator preliminary separation of moisture is connected with the entrance of the vortex tube through the active nozzle of the ejector, the output of the vortex tube with a hot gas stream through the heat exchanger is connected to the passive nozzle of the ejector, and the output of the vortex tube with x with an olodic gas flow, it is connected in series through a moisture separator for additional moisture separation and a heat exchanger with an outlet pipe; equipped with a second dehumidifier for additional moisture separation, installed in parallel with the first dehumidifier for additional moisture separation between the outlet of the vortex tube with a cold gas stream and a heat exchanger, pressure differential devices with which both dehumidifiers of additional moisture separation are equipped, shut-off devices located at the inlets of the additional separator connecting them respectively with the exit of the vortex tube with a cold gas stream and the output of the passive cost sharing ejector and locking devices arranged on dehumidifiers additional separation outputs connecting them respectively to the heat exchanger and the outlet of the vortex tube with a hot gas stream.

The fundamental difference is the use of a vortex tube to obtain the heat / cold required in the process. Effective operation of the vortex tube is possible at sufficiently high pressures of the gas phase, which is associated with significant energy consumption for its compression. In turn, increasing the pressure of the gas mixture promotes the formation of gas hydrates, which leads to technological difficulties in the thawing process.

The closest in technical essence is the “DRY GAS BLOCK” by a.s. SU 1143448 dated 08/26/1983, published on 03/07/1985, IPC B01D 53/26, F25J 3/08, including sequentially installed gas inlet line, cooling chamber, cyclically switched freezers and adsorbers, while

 In order to reduce energy consumption by reducing the moisture content in the gas to be drained during the cold drying period, the inlet of the freezer in the defrost mode is connected to the inlet gas line, and the output to the inlet of the cooling chamber, the outlet of which is connected to the adsorber in the adsorption mode through the freezer in the drying mode, while the freezer . in drying mode is connected to the cooling chamber.

The objective of the proposed technical solution is the simultaneous purification of associated petroleum gas from moisture and heavy hydrocarbons without the use of adsorbers with the maximum use of internal thermal resources of the device.

The problem is solved by means of a device for the preparation of associated petroleum gases that contains a gas circuit and switchable freezers, while it additionally contains a refrigeration circuit and a coolant circulation circuit, and the gas circuit contains a series-connected, cooled recuperator circuit, a first stage separator, parallel freezers, parallel connected separators of the second stage, a heated heater circuit, a heated heat exchanger circuit; the refrigeration circuit is closed and contains serially connected, a receiver for a refrigerant, a compressor, an oil separator, an air-cooled condenser, a cooled circuit of a heat exchanger-condenser, an intermediate receiver and an inductor, while additionally in series are connected to the outlet for the refrigerant from the oil separator, heat exchanger circuits of freezers, heat exchange circuits second stage separators and a refrigerant receiver connected to the receiver for the refrigerant, and the receiver for the refrigerant oedinen with heat exchange circuits separator second stage; the coolant circulation loop is closed and contains serially connected, a coolant tank, a pump, a heated loop of a heat exchanger-condenser and a cooled loop of a heater; the gas circuit further comprises sensors located at the entrances of the freezers and at the outputs of the second stage separators.

A device for the preparation of associated petroleum gases is shown in figure 1, where the gas circuit 1, recuperator 2, separator 3 of the first stage, freezer 4, freezer 5, separator 6 of the second stage, separator 7 of the second stage, moisture outlet 8, heater 9, refrigeration circuit 10, receiver 11 for refrigerant, compressor 12, oil separator 13, air-cooled condenser 14, heat exchanger-condenser 15, intermediate receiver 16, refrigerant collector 17, coolant circulation circuit 18, coolant tank 19, pump 20, sensors 21, liquid outlet 22 at hydrocarbons, throttle 23.

A device for the preparation of associated petroleum gases comprises a gas circuit 1, a refrigeration circuit 10 and a coolant circulation circuit 18.

The gas circuit 1 contains a series-connected pipeline, the cooled circuit of the recuperator 2, the separator 3 of the first stage, freezers 4 and 5, the separators 6 and 7 of the second stage, the heated circuit of the heater 9, the heated circuit of the recuperator 2, while the separator 6 is connected to the freezer 4, and the separator 7 is connected to the freezer 5. The freezers 4 and 5 are connected by the inputs of the heat exchange circuits to the separator 3 of the first stage in parallel with the possibility of switching the gas supply from the separator 3 either to the freezer 4 or to the freezer cultivator 5 to ensure their alternate work. Switching between freezers 4 and 5 is carried out, for example, by a signal from sensors 21 located at the inputs of the freezers 4, 5 and at the outputs of the separators 6, 7 of the second stage.

The refrigeration circuit 10 comprises a series-connected loop in a closed loop, a receiver 11 for a refrigerant, a compressor 12, an oil separator 13, an air cooling condenser 14, a cooled circuit of a heat exchanger-condenser 15, an intermediate receiver 16, an inductor 23. To the outlet for the refrigerant from the oil separator 13 is additionally sequentially connected, the heat exchange circuits of the freezers 4 and 5, the heat exchange circuits of the separators 6 and 7 of the second stage and the refrigerant collector 17 connected to the receiver 11 for the refrigerant. The compressor crankcase 12 is connected to the oil separator 13. The receiver 11 for the refrigerant is additionally connected to the heat exchange circuits of the separators 6 and 7 of the second stage.

The coolant circulation circuit 18 contains consecutively connected by a pipeline into a closed loop, a coolant tank 19, a pump 20, a heated circuit of a heat exchanger-condenser 15 and a heated heater circuit 9.

Oil associated gas from the oil separator enters the cooled circuit of the recuperator 2, where it is cooled by the gas flow passing in the heated circuit of the recuperator 2 to + 5 ... 10 ° C, as a result of which moisture (condensate) partially drops out of the associated gas. Petroleum associated gas with condensate enters the separator 3 of the first stage, where the gas is separated from the condensate. From the separator 3, the petroleum associated gas enters one of the freezers 4 or 5, operating in the freezing mode, where it is cooled to a temperature of -40 ° C by freon boiling in the pipes of the heat exchange circuit of this uteri. During cooling, water drops out of the gas, which freezes on the pipes of the freezer 4 or 5 and hydrocarbon condensate (LPG). The associated petroleum gas together with the hydrocarbon condensate is directed to a separator 6 or 7, where the streams are separated and the hydrocarbon condensate is removed through the outlet 22. Gas from the separator 6 or 7 is fed into the heated loop of the heater 9, where it is heated with a coolant to a temperature of -3 ... 0 ° C and goes to the heated circuit of recuperator 2, where it heats up to + 10 ... 20 ° C, cooling the inlet oil associated gas, and goes to the consumer. The second freezer at this time operates in the defrosting mode, and the moisture frozen in it melts and flows into the separator 6 or 7, from where it is removed by tap 8. The freezers 4 or 5 are switched from the freezing mode to the defrosting mode and vice versa by command of the differential pressure sensors 21 , temperatures at the inputs of the freezers 4, 5 and at the outputs of the separators 6, 7 of the second stage or at certain intervals. The use of parallel-connected freezers, with the possibility of their alternating operation, allows you to alternate the modes of operation of the freezers, which means that the associated petroleum gas is dried without interrupting the operation of the device to thaw moisture (condensate) frozen in the freezers, which greatly optimizes the operation of the device.

The use of freezers installed in parallel and alternately included in the operation and separators of the second stage connected in parallel to them allows the use of freon as a refrigerant, due to which the temperature reaches -40 ° C in freezers. Achieving this temperature allows you to simultaneously condense water and heavy hydrocarbons and remove them from associated petroleum gas without the use of adsorbers.

In the refrigeration circuit 10, gaseous freon from the receiver 11 for the refrigerant is sent to the compressor 12, where it is compressed. The compressed freon enters the oil separator 13, where oil is separated from the freon, which is returned to the crankcase of the compressor 12. Next, part of the compressed freon is sent to the heat exchanger circuit of the freezer 4 or 5, which is in the defrosting mode, condenses in it, giving off heat and passing through the heat exchange circuit separator 6 or 7, in liquid form through the collector 17 of the refrigerant enters the receiver 11.

Another part of the freon goes to freeze the installation and enters the air-cooled condenser 14, then to the cooled circuit of the heat exchanger-condenser 15, where it transfers heat to the intermediate heat carrier, after which the liquid freon enters the intermediate receiver 16. Leaving the receiver 16, the freon passes through the throttle 23, where it is throttled, it cools down and part of the freon boils.

Next, the vapor-liquid mixture enters the receiver 11, from where liquid freon with a temperature of -45 ... -40 enters the heat exchanger circuit of the separator 6 or 7, then to the heat exchanger circuit of the freezer 4 or 5, where part of the freon boils, releasing cold oil associated gas. The vapor-liquid mixture enters the receiver 11. The cycle repeats. Passing through the heat exchange circuit of the separator 6 or 7, the freon maintains the temperature of the separated gas -40C in it to prevent the transition of liquefied heavy hydrocarbons to a vapor state.

In the coolant circulation circuit 18, the coolant is piped from the coolant tank 19 through the pump 20 to the heated circuit of the heat exchanger-condenser 15, where it is heated, taking the heat of the condensing freon. From the heat exchanger-condenser 15, the coolant enters the cooled circuit of the heater 9, where it is cooled by dried gas, and again enters the tank 19. The cycle is repeated.

The use of a recuperator, heater, heat exchanger-condenser allows for efficient heat exchange between associated petroleum gas, coolant and refrigerant inside the device, which makes it possible to maximize the use of the internal heat resources of the device, which means it reduces its energy consumption.

The technical effect of the proposed technical solution is the simultaneous purification of associated petroleum gas from moisture and heavy hydrocarbons without the use of adsorbers with the maximum use of the internal thermal resources of the device due to the associated petroleum gas preparation device that contains a gas circuit and switchable freezers while it additionally contains a refrigeration circuit and coolant circuit, and the gas circuit contains a series-connected, cooled circuit river eratora, the first stage separator, connected in parallel vymorazhivateli parallel connected separators second stage, heated heater circuit, the heated heat recovery circuit; the refrigeration circuit is closed and contains serially connected, a receiver for a refrigerant, a compressor, an oil separator, an air-cooled condenser, a cooled circuit of a heat exchanger-condenser, an intermediate receiver and an inductor, while additionally in series are connected to the outlet for the refrigerant from the oil separator, heat exchanger circuits of freezers, heat exchange circuits second stage separators and a refrigerant receiver connected to the receiver for the refrigerant, and the receiver for the refrigerant oedinen with heat exchange circuits separator second stage; the coolant circulation loop is closed and contains serially connected, a coolant tank, a pump, a heated loop of a heat exchanger-condenser and a cooled loop of a heater; the gas circuit further comprises sensors located at the entrances of the freezers and at the outputs of the second stage separators.

Claims (4)

1. A device for the preparation of associated petroleum gases, comprising a gas circuit and switchable freezers, characterized in that it further comprises a refrigeration circuit and a coolant circulation circuit, and the gas circuit contains a cooled recuperator circuit, a first stage separator, parallel connected freezers, and parallel connected separators second stage, a heated heater circuit, a heated heat exchanger circuit. 2. A device for the preparation of associated petroleum gases according to claim 1, characterized in that the refrigeration circuit is closed and contains a serially connected receiver for a refrigerant, a compressor, an oil separator, an air cooling condenser, a cooled circuit of a heat exchanger-condenser, an intermediate receiver and a choke, to the outlet for the refrigerant from the oil separator are additionally connected in series, the heat exchange circuits of the freezers, the heat exchange circuits of the separators of the second stage and the refrigerant collector, Connections to the refrigerant receiver, and the refrigerant receiver further connected to the heat exchange circuit of the second stage separators. 3. The device for the preparation of associated petroleum gases according to claim 1, characterized in that the coolant circulation loop is closed and contains a series-connected coolant tank, a pump, a heated heat exchanger-condenser circuit and a cooled heater circuit. 4. A device for the preparation of associated petroleum gases according to claim 1, characterized in that the gas circuit further comprises sensors located at the inlets of the freezers and at the outputs of the second stage separators.