CN219415431U - Be used for industry CO 2 Cold source system of liquefying device - Google Patents
Be used for industry CO 2 Cold source system of liquefying device Download PDFInfo
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- CN219415431U CN219415431U CN202222436564.2U CN202222436564U CN219415431U CN 219415431 U CN219415431 U CN 219415431U CN 202222436564 U CN202222436564 U CN 202222436564U CN 219415431 U CN219415431 U CN 219415431U
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Abstract
The utility model discloses a method for industrial CO 2 The cold source system of the liquefying device comprises a cold carrying skid system; cold-carrying pry blockThe system comprises a self-contained gas separation lamella CO 2 Condensing evaporator, CO 2 Liquid storage barrel and CO2 shielding pump, compressor cold source system and self-contained gas separation plate shell type CO 2 The shell side inlet of the condensing evaporator is connected with the shell-and-plate type CO with air separation 2 The side inlet of the condensing evaporator plate is connected to CO through a gas pipeline 2 The gas outlet of the liquid storage barrel is provided with a gas inlet; from taking gas to divide lamella CO 2 The side outlet of the condensing evaporator plate is connected to CO through a liquid pipeline 2 On the liquid inlet of the liquid storage barrel, CO 2 The liquid outlet of the liquid storage barrel passes through CO 2 The canned motor pump is connected with the cold equipment system. CO 2 As the secondary refrigerant, the cold-air heat exchanger does not contain refrigeration oil, and solves the problems that the oil return on the cold side of a cold equipment system is difficult and the efficiency of the heat exchanger is gradually reduced; the efficiency of the whole cold source system is improved; the filling amount of the refrigeration working medium is greatly reduced, and the device is safer and more environment-friendly; the difficulty in controlling the cold side of the cooling equipment system is reduced, and the system is simple to control and stable in operation.
Description
Technical Field
The utility model belongs to the fields of refrigeration and industrial gas recovery liquefaction, and relates to a method for industrial CO 2 Cold source system of liquefying device, especially suitable for industrial emission of CO 2 Capturing, compressing and liquefying for storage.
Background
In the liquefaction of industrial gases, especially industrial CO 2 Refrigerating system commonly known as 'ice machine' in the prior art in the field of compression and liquefaction usually uses working medium such as ammonia, freon or propane as refrigerant, and takes away raw material CO by reducing pressure and evaporating the working medium liquefied by condenser of refrigerating system in heat exchanger (generally liquefier, tower top condenser and subcooler) needing cold source 2 Sensible heat and latent heat of condensation of the gas. Such a system requires control of the liquid level of each heat exchanger, avoiding liquid entrainment by the refrigerant compressor suction; and each heat exchanger needs a special oil return device, so that the refrigerating oil entering the refrigerating system of the heat exchanger can stably return to the refrigerating compressor.
The defects of the prior art are:
1. the refrigerating oil of the refrigeration compressor enters the system, and as the refrigerating working medium enters the process heat exchanger, the oil is difficult to be taken from the heat exchanger due to the low temperature of the heat exchanger. The frozen oil is extremely easy to stay in the heat exchanger, and the efficiency and the capacity of the heat exchanger are reduced along with the increase of the accumulation amount of the frozen oil; and the longer the time, the more severely the drop.
2. For some refrigeration media which are miscible with the refrigeration oil, such as freon, a large amount of non-evaporated refrigerant liquid is taken out from the heat exchanger in the process of taking the oil from the heat exchanger, and the liquid and the refrigeration oil are returned to the suction pipeline of the refrigeration compressor together, so that the operation safety of the refrigeration compressor is affected and the effective capacity of the refrigeration compressor is reduced.
3. The refrigerant is sent from the machine room to the outdoor cold heat exchanger by means of pressure difference, and is usually far away and has large height difference (especially the condenser at the top of the rectifying tower), which can lead to: firstly, the high pressure of the refrigeration system is increased, and the power consumption of the refrigeration compressor is increased; secondly, the suction line pressure loss is large, so that the suction pressure of the refrigeration compressor is reduced, and the efficiency (COP) of the refrigeration compressor is reduced.
4. The refrigerant which is evaporated from each process heat exchanger and returned to the suction pipeline of the refrigeration compressor is ensured to be in a gas state, and the liquid level of each heat exchanger must be strictly controlled because the refrigeration compressor cannot operate in a liquid suction mode. Therefore, each heat exchanger is provided with a complex liquid level sensor, an electric liquid supply valve and a control device, and the liquid level is not easy to control and stable. So the liquid level of the refrigerating medium is usually controlled to be very low during the operation, thus limiting the heat exchange capacity of the heat exchanger and leading CO to 2 The outlet temperature of the raw material gas can not reach the set value, and CO 2 The discharge pressure and temperature of the process compressor are increased, and the energy consumption is increased. Even when in debugging and operation, the liquid level control of the heat exchanger is unstable, and the liquid returns to the refrigeration system, so that the liquid impact of the refrigeration compressor is damaged.
How to give industrial CO 2 The recovery and liquefaction system provides a cold source system with high efficiency and simple operation, and is a technical key problem in the field.
Disclosure of Invention
This practice isWith the novel aim of providing a process for industrial CO 2 The cold source system of the liquefying device has stable operation, high efficiency and simple operation.
In order to achieve the above object, the technical scheme of the present utility model is as follows:
be used for industry CO 2 The cold source system of the liquefying device comprises a compressor cold source system, a cold carrying skid system and a cold using equipment system; the cold-carrying skid block system comprises a plate-type CO with air separation 2 Condensing evaporator, CO 2 Liquid storage barrel and CO 2 The shielding pump, the compressor cold source system and the self-contained gas separation plate shell type CO 2 The shell side inlet of the condensing evaporator is connected with the shell-and-plate type CO with air separation 2 The plate side inlet of the condensing evaporator is connected to the CO through a gas pipeline 2 On the gas outlet of the liquid storage barrel, the plate-shell type CO with gas separation 2 The plate side outlet of the condensing evaporator is connected to the CO through a liquid pipeline 2 On the liquid inlet of the liquid storage barrel, CO 2 The liquid outlet of the liquid storage barrel passes through CO 2 The canned motor pump is connected with the cold equipment system.
The compressor cold source system comprises a screw compressor, an oil-gas separator, a condenser and a liquid receiver; the exhaust port of the screw compressor is connected with the inlet of the oil-gas separator through an exhaust pipeline, and the frozen oil outlet of the oil-gas separator is connected with the oil return port of the screw compressor through a frozen oil pipeline and an oil cooler; the air side outlet of the oil separator is connected with the inlet of the condenser, the liquid outlet of the condenser is connected with the inlet of the liquid reservoir, and the outlet of the liquid reservoir is connected with the liquid pipeline and is divided into two paths: one path is connected to the cold side inlet of the economizer through an economizer expansion valve, and returns to the economizer port of the screw compressor through the cold side outlet; the other path is from the self-contained gas split plate-shell type CO through a hot side inlet, a hot side outlet and a liquid supply electric valve of the economizer 2 The shell side inlet of the condensing evaporator enters the self-contained gas separation plate shell type CO 2 Condensing the shell side space of the evaporator; from taking gas to divide lamella CO 2 The shell side outlet of the condensing evaporator is connected to the air suction interface of the compressor through an air suction pipeline; from taking gas to divide lamella CO 2 The oil drain port of the condensing evaporator is connected to the oil return pipelineAn air suction pipeline of the screw compressor.
The refrigeration equipment system comprises a subcooler, a liquefier and an overhead condenser, and CO 2 The liquid outlet of the liquid storage barrel passes through CO 2 The canned motor pump 12 is connected to the subcooler, liquefier and overhead condenser, respectively.
From taking gas to divide lamella CO 2 The condensing evaporator comprises a shell, wherein a plate bundle is arranged in the shell, a wire mesh demister assembly is arranged above the plate bundle in the shell, the assembly and part of the shell form a cavity, the cavity is communicated with a shell side outlet, and the cavity is communicated with the cavity where the plate bundle in the shell is arranged through the wire mesh demister assembly.
The wire mesh foam remover component consists of an inverted V-shaped wire mesh foam remover and two fan-shaped thin steel plates welded at two ends of the wire mesh foam remover; the steel sheet is connected with a part of the shell, so that the wire mesh demister assembly 2 and the part of the shell form a cavity.
The self-contained gas separation plate-shell type CO 2 Condensing CO in an evaporator 2 The cold source is liquefied on the plate side of the heat exchanger and evaporated on the shell side.
The self-contained gas separation plate-shell type CO 2 The condensing evaporator is composed of shell-and-tube CO 2 Condensing evaporator or plate type CO 2 The condensing evaporator is replaced by a shell-and-tube CO 2 When condensing the evaporator, the compressor cold source system and the shell-and-tube CO 2 Shell side inlet of condensing evaporator is connected, shell-and-tube CO 2 The pipe side inlet of the condensing evaporator is connected to the CO through a gas pipeline 2 On the gas outlet of the liquid storage barrel, shell-and-tube CO 2 The pipe side outlet of the condensing evaporator is connected to the CO through a liquid pipeline 2 On the liquid inlet of the liquid storage barrel, CO 2 The liquid outlet of the liquid storage barrel passes through CO 2 The shielding pump is connected with the cooling equipment system; when in plate type CO 2 When condensing the evaporator, the compressor cold source system and the plate type CO 2 The cold side inlet of the condensing evaporator is connected with the plate type CO 2 The hot side inlet in condensing the evaporator is connected to the CO by a gas line 2 Plate type CO on gas outlet of liquid storage barrel 2 The hot side outlet of the condensing evaporator is connected to the CO through a liquid line 2 Liquid storage barrelCO on the liquid inlet of (2) 2 The liquid outlet of the liquid storage barrel passes through CO 2 The canned motor pump is connected with the cold equipment system.
The CO 2 The liquid outlet of the liquid storage barrel is connected with the CO through a liquid pipeline 2 The shield pumps are then connected to: a subcooler flow control valve, entering the subcooler; the liquefier flow regulating valve enters the liquefier, and the overhead condenser flow regulating valve enters the overhead condenser.
The outlets of the subcooler, the liquefier and the tower top condenser are connected to CO through a gas-liquid two-phase fluid pipeline after being combined 2 And a gas-liquid inlet of the liquid storage barrel.
The screw compressor is a single-machine double-stage screw compressor or a double-machine double-stage screw compressor, and can also be in a form of a single-stage screw compressor with an economizer; the number of the compressors can be 1 or more, and the compressors can be variable frequency or fixed frequency.
The self-contained gas separation plate-shell type CO 2 The shell side of the condensing evaporator is provided with an oil return interface according to the type of the refrigerating working medium.
The oil cooler is siphon working medium cooling, air cooling or water cooling; the economizer is a dry evaporation, flooded evaporation or cold flash tank.
The condenser is an evaporative condenser, a water-cooled condenser or an air-cooled condenser.
The subcoolers, liquefiers, and overhead condensers are of the shell-and-tube, shell-and-tube or plate type, preferably of the shell-and-tube type.
Said CO 2 The number of the shielding pumps is at least one.
The plurality of cold source systems can also be CO 2 The liquefying device provides a cold source.
Refrigeration equipment includes, but is not limited to, subcoolers, liquefiers and overhead condensers.
The beneficial effects of the utility model are as follows:
1. due to pump supply of CO 2 The liquid does not contain refrigeration oil, and the liquid is used for cooling raw material mixed gas to solve the problem of CO 2 Liquefier, CO 2 Rectifying column top condenser, CO 2 Cold side oil return of subcooler is difficultProblems;
2. the cold side of the 3 heat exchangers does not contain frozen oil, so that the problem that the efficiency and the capacity of the heat exchangers are gradually reduced along with the running time due to the fact that the frozen oil is accumulated in the heat exchangers is solved;
3、CO 2 as a secondary refrigerant, the cold-source heat exchanger has the physical advantages of large refrigerating capacity per unit volume, good heat transfer performance, small surface tension and the like, and improves the efficiency of the whole cold-source system;
4、CO 2 as a secondary refrigerant, the working media such as ammonia or freon serving as a refrigerant are limited in a refrigeration compression machine room, so that the filling quantity of the working media such as ammonia or freon is greatly reduced, and the secondary refrigerant is safer and more environment-friendly; greatly reduce CO 2 Liquefier, CO 2 Rectifying column top condenser, CO 2 The difficulty of cold side control of the subcooler is realized, and the system is simple to control and stable in operation.
Drawings
FIG. 1 is a schematic diagram of the device of the present utility model.
FIG. 2 is a self contained gas separation lamella CO 2 Condensing evaporator schematic.
Reference numeral 1 illustrates:
1_screw compressor; 1 a_exhaust interface; 1 b_economizer interface; 1 c_inhalation interface; 1 D_oil return port; 2_oil separator; 2 a_gas side outlet; 2 b_oil separator inlet; a 2c_frozen oil outlet; 3_condenser; 3 A_condenser outlet; a 3b_condenser inlet; 4_reservoir; a 4a_reservoir outlet; 4b_reservoir inlet; 5_economizer; 5 a_hot side inlet, 5 b_hot side outlet; a 5c_cold side inlet; 5 d_cold side exit; 6_economizer expansion valve; 7_liquid supply electric valve; 8-with-gas split lamella CO 2 A condensing evaporator; 8A shell side inlet; 8B shell side outlet; 8C plate side inlet; 8D plate side outlet; 8 E_oil drain; a 9_electric valve controller; 10_level sensor; 11_CO 2 A liquid storage barrel; 11 a_liquid outlet; 11 B_gas-liquid inlet; 11 c_gas outlet; 11 d_liquid inlet; 12_CO 2 A shield pump; 12A_CO 2 Shielding the pump outlet; 12B_CO 2 Shielding the pump inlet; 13_cold source system control box; 14_oil cooler; 15_subcooler flow regulating valve; 16-liquefier flow regulating valveThe method comprises the steps of carrying out a first treatment on the surface of the 17_overhead condenser flow regulator valve; 18_subcooler; 19_liquefier; 20_overhead condenser; 21_CO 2 A reservoir level sensor; 22_compressor cold source system; 23_cold-carrying skid system; 24_cold appliance system; 25_wire mesh demister; 26_sheet steel; 27_shell; 28_plate bundle, 29_level gauge upper take over; the lower part of the 30-level gauge is connected with the pipe.
Detailed Description
In the following, in connection with the embodiment of fig. 1, in CO 2 The utility model will be further described in the context of a captured, compressed, liquefaction plant that is already operating steadily.
Example 1
As in FIG. 1, for industrial CO 2 The cold source system of the liquefying device is used in industrial CO 2 CO capturing, compressing and liquefying device 2 In the liquefaction process, the tower top of the rectifying tower vacates the boiled CO 2 Reliquefaction process of components and high-purity CO at bottom of rectifying tower 2 The product enters the supercooling process before the spherical tank. The cold source temperatures of the liquefier 19, the tower top condenser 20 and the subcooler 18 are the same, so that the same evaporation temperature is used for uniformly cooling. These three heat exchangers are referred to as a cold plant system 24.
Said use for industrial CO 2 The cold source system of the liquefying device also comprises a compressor cold source system 22 and a cold-carrying skid block system 23; the compressor cold source system comprises a screw compressor 1, an oil-gas separator 2, a condenser 3 and a liquid reservoir 4, and the cold-carrying skid block system comprises a plate-shell type CO with gas separation 2 Condensing evaporator 8, CO 2 Liquid storage barrel 11 and CO 2 Shielding pump, from taking gas to divide lamella formula CO 2 The condensing evaporator 8 comprises a shell 27, a plate bundle 28 is arranged in the shell 27, the shell side is not communicated with the plate side, a wire mesh foam remover component is arranged above the plate bundle 28 in the shell 27, a cavity is formed by the component and part of the shell and is communicated with a shell side outlet 8B, the cavity is communicated with the cavity where the plate bundle 28 is arranged in the shell through the wire mesh foam remover component, and the wire mesh foam remover component consists of an inverted-V-shaped wire mesh foam remover 25 and two fan-shaped steel plates 26 welded at two ends of the wire mesh foam remover. The exhaust port 1A of the screw compressor 1 passes through an exhaust pipelineThe frozen oil outlet 2C of the oil-gas separator 2 is connected with the oil return port 1D of the screw compressor 1 through a frozen oil pipeline and an oil cooler 14; the air side outlet 2A of the oil separator 2 is connected with the condenser inlet 3B, the condenser liquid outlet 3A is connected with the liquid reservoir inlet 4B, and the liquid reservoir outlet 4A is connected with a liquid pipeline and is divided into two paths: one way is connected to the cold side inlet 5C of the economizer 5 through the economizer expansion valve 6, via the cold side outlet 5D, back to the economizer port 1B of the screw compressor 1; the other path is from the self-contained gas split plate-shell type CO through a hot side inlet 5A, a hot side outlet 5B and a liquid supply electric valve 7 of the economizer 5 2 The shell side inlet 8A of the condensing evaporator 8 enters the self-contained air separation shell-and-plate CO 2 A shell side space of the condensation evaporator 8; from taking gas to divide lamella CO 2 The shell side outlet 8B of the condensation evaporator 8 is connected to the suction port 1C of the screw compressor 1 through a suction line; from taking gas to divide lamella CO 2 The oil drain port 8E of the condensing evaporator 8 is connected to the air suction pipeline of the screw compressor 1 through an oil return pipeline; from taking gas to divide lamella CO 2 The plate side inlet 8C of the condensing evaporator 8 is connected to CO through a gas line 2 A gas outlet 11C of the liquid storage barrel 11; from taking gas to divide lamella CO 2 The plate side outlet 8D of the condensing evaporator 8 is connected to CO through a liquid line 2 A liquid inlet 11D of the liquid storage barrel 11; CO 2 The liquid outlet 11A of the liquid storage barrel 11 is connected with the CO through a liquid pipeline 2 Shield pump inlet 12B, CO 2 Canned pump 12 and CO 2 The shield pump outlet 12A is then connected to: a subcooler flow regulating valve 15, which enters a subcooler 18; a liquefier flow regulator valve 16, into a liquefier 19, and an overhead condenser flow regulator valve 17, into an overhead condenser 20; the outlets of the subcooler 18, the liquefier 19 and the overhead condenser 20 are joined and then connected to CO via a gas-liquid two-phase fluid line 2 A gas-liquid inlet 11B of the liquid storage barrel.
The industrial CO 2 The cold source system of the liquefying device works as follows:
by CO 2 The canned pump 12 handles CO 2 Liquid CO in the liquid storage tank 12 2 The secondary refrigerant is pumped to the subcooler 18, the liquefier 19 and the overhead condenser 20, and can exchange heat according to the heat exchangerThe states of the flow regulating valve subcooler flow regulating valve 15, liquefier flow regulating valve 16 and overhead condenser flow regulating valve 17 at the inlet are respectively adjusted. In heat exchangers, CO as a coolant 2 Liquid absorption of raw CO 2 The heat quantity of (2) is changed into gas-liquid two-phase back to CO 2 In the liquid storage barrel 11, the liquid falls down to CO 2 Saturated gas enters the self-contained gas separation lamella CO through the pipeline 2 In the condensation evaporator 8, i.e. CO 2 The heat load of raw material cooling is controlled by the secondary refrigerant CO 2 Phase change tape of (1) is carried to from taking gas to divide lamella CO 2 In the condensation evaporator 8. At this time, the gas-bearing lamella CO 2 The refrigerant liquid (ammonia, freon or propane, etc.) at the shell side of the condensing evaporator 8 has a lower temperature than the CO entering the plate side 2 Saturated gas temperature, heated evaporation becomes refrigerant saturated gas, the refrigerant saturated gas is sucked by the screw compressor 1 through a suction pipeline to compress and boost pressure, and the high-temperature high-pressure overheated refrigerant gas is discharged by the screw compressor 1 and enters the oil-gas separator 2; the separated high-temperature frozen oil is cooled by an oil cooler 14 and then returns to an oil return port 1D of the screw compressor 1, wherein the oil cooler 14 is in siphon working medium cooling, air cooling or water cooling; the refrigerant gas separated by the oil-gas separator 2 enters a condenser 3, the condenser 3 discharges condensation heat of refrigerant, the state of the refrigerant becomes intermediate temperature liquid equal to the pressure of exhaust gas, and then the intermediate temperature liquid enters a liquid reservoir 4, wherein the condenser 3 is an evaporative condenser, an air-cooled condenser or a water-cooled condenser. The medium-temperature liquid from the liquid reservoir 4 enters the economizer 5 in two paths, wherein one path absorbs heat by evaporation in the economizer, and the gas after evaporation enters the economizer port 1B of the screw compressor 1. The other path of liquid pressure is unchanged, and after the temperature is reduced, the liquid is separated into plate-shell type CO by self-contained gas 2 The liquid supply electric valve 7 of the condensing evaporator 8 throttles and reduces pressure and then enters the plate-and-shell type CO with gas 2 The shell side of the condensation evaporator 8 is evaporated to absorb the CO 2 The saturated gas condenses and liquefies to release latent heat. The economizer 5 is a dry evaporation, flooded evaporation or cold flash drum.
Screw compressor 1 divides lamella CO from taking gas 2 Saturated gas sucked into refrigerating medium by condensing evaporator 8The body is compressed, boosted, condensed and liquefied, supercooled by the economizer 5, and fed into the condensing evaporator by the liquid feeding electric valve 7 to absorb heat and evaporate to become saturated gas of the refrigerating medium, and the saturated gas is circularly reciprocated, which is the working principle of the cold source part of the compressor of the cold source system.
For the cold-carrying skid block system 23 which is connected with the compressor cold source system 22 and the cold equipment system 24, the function is to use the cold-carrying agent CO 2 The refrigeration capacity generated by the refrigeration system compressor is transferred to refrigeration equipment, namely, subcooler 18, liquefier 19, overhead condenser 20, and the like. Compared with the conventional secondary refrigerant such as ethylene glycol, propylene glycol, calcium chloride and the like, CO 2 The advantages are obvious: 1 is CO 2 The phase change exists in the heat transfer process, the refrigerating capacity per unit volume is large, and the power of the circulating pump is greatly reduced; 2 is CO 2 Under the condition of low temperature, the heat transfer performance is good, the viscosity is low, the investment of the heat exchanger can be reduced to a great extent, and the heat transfer temperature difference is also small; and 3, as the flow is obviously reduced compared with the phase-change-free secondary refrigerant, various pipeline specifications and valve specifications are all reduced, and the material consumption is reduced.
The working principle of the cold-carrying skid block system is as follows, and the working principle is as follows: the refrigerant liquid enters the self-contained gas separation plate shell type CO through the liquid supply electric valve 7 2 In the condensing evaporator 8, the plate-shell type CO is separated from the gas 2 The condensing evaporator 8 is provided with a liquid level sensor 10, and the liquid level sensor 10 continuously detects CO 2 The liquid level of the refrigerating medium at the shell side of the condensing evaporator 8 is regulated by the electric valve controller 9 according to the liquid level signal to adjust the opening of the liquid supply electric valve 7, so that the liquid level of the refrigerating medium is stabilized at the target liquid level, and the CO is realized 2 The condensing evaporator 8 fully plays the heat exchange performance and also avoids liquid return by suction.
CO 2 Saturated steam from CO 2 The liquid storage barrel 11 enters CO 2 The condensing evaporator 8 exothermically liquefies into CO of equal pressure 2 Saturated liquid falls into the CO due to gravity 2 Condensing CO under evaporator 8 2 In the liquid storage barrel 11. CO 2 The liquid storage barrel 11 is provided with a liquid level sensor 21 for liquid level monitoring and ultrahigh alarming. Liquefied CO 2 Liquid passing through CO 2 The canned pump 12 is transported to the userA cold plant subcooler 18, a liquefier 19 and an overhead condenser 20.
Since the separation efficiency of the oil separator 2 cannot be 100%, CO is introduced via the liquid supply motor valve 7 2 The refrigerant of the condensation evaporator 8 necessarily contains refrigerant oil. The different refrigeration working media have very different intersolubility with the refrigeration oil, are insoluble, are partially intersoluble and are infinitely intersoluble. Therefore, the CO is determined according to the mutual solubility characteristics of the refrigerant and the refrigeration oil and the size of the refrigerant and the density 2 The position of the shell side oil drain port 8E of the condensation evaporator 8 and the oil return scheme of lubricating oil. Because the compressor cold source system and the cold-carrying skid block system are arranged in the machine room, the distance is short, the oil return difficulty is small, and the oil return efficiency is stable. Compared with the traditional scheme, the auxiliary subcooler, the liquefier and the overhead condenser are used for oil return respectively for a long distance, and are simpler and more stable.
Claims (10)
1. Be used for industry CO 2 The cold source system of liquefaction device, its characterized in that: comprises a compressor cold source system (22), a cold-carrying skid system (23) and a cold equipment system (24); the cold-carrying skid system (23) comprises a self-contained air separation lamella CO 2 Condensing evaporator (8), CO 2 Liquid storage barrel (11) and CO 2 A canned pump (12), a compressor cold source system (22) and a self-contained air separation lamella CO 2 The shell side inlet of the condensing evaporator (8) is connected with the shell-side inlet of the condensing evaporator, and the condensing evaporator is provided with a gas separation plate shell type CO 2 The plate side inlet of the condensing evaporator (8) is connected to CO through a gas pipeline 2 On the gas outlet of the liquid storage barrel (11), a plate-shell type CO with gas separation is arranged 2 The plate-side outlet of the condensation evaporator (8) is connected to the CO by a liquid line 2 On the liquid inlet of the liquid storage barrel (11), CO 2 The liquid outlet of the liquid storage barrel (11) is connected with the liquid storage barrel through CO 2 The canned motor pump (12) is connected to a cold appliance system (24).
2. An industrial CO according to claim 1 2 The cold source system of liquefaction device, its characterized in that: the compressor cold source system (22) comprises a screw compressor (1) and an oil-gas separator (2)A condenser (3) and a reservoir (4); an exhaust port (1A) of the screw compressor (1) is connected with an oil-gas separator inlet (2B) through an exhaust pipeline, and a frozen oil outlet (2C) of the oil-gas separator (2) is connected with an oil return port (1D) of the screw compressor (1) through a frozen oil pipeline and an oil cooler (14); the air side outlet (2A) of the oil-gas separator (2) is connected with the condenser inlet (3B), the condenser liquid outlet (3A) is connected with the liquid reservoir inlet (4B), and the liquid reservoir outlet (4A) is connected with a liquid pipeline and is divided into two paths: one way is connected to a cold side inlet (5C) of the economizer (5) through an economizer expansion valve (6), and returns to an economizer port (1B) of the screw compressor (1) through a cold side outlet (5D); the other path is divided into a lamella CO from the self-contained gas through a hot side inlet (5A), a hot side outlet (5B) and a liquid supply electric valve (7) of the economizer (5) 2 The shell side inlet (8A) of the condensing evaporator (8) enters the plate shell type CO with the gas 2 A shell side space of the condensing evaporator (8); from taking gas to divide lamella CO 2 The shell side outlet (8B) of the condensing evaporator (8) is connected to the suction interface (1C) of the screw compressor (1) through a suction pipeline; from taking gas to divide lamella CO 2 An oil drain port (8E) of the condensing evaporator (8) is connected to an air suction pipeline of the screw compressor (1) through an oil return pipeline.
3. An industrial CO according to claim 1 2 The cold source system of liquefaction device, its characterized in that: the refrigeration equipment system comprises a subcooler (18), a liquefier (19) and an overhead condenser (20), and CO 2 The liquid outlet (11A) of the liquid storage barrel (11) passes through CO 2 The canned motor pump (12) is respectively connected with the subcooler (18), the liquefier (19) and the overhead condenser (20).
4. An industrial CO according to claim 1 2 The cold source system of liquefaction device, its characterized in that: from taking gas to divide lamella CO 2 The condensing evaporator (8) comprises a shell (27), wherein a plate bundle (28) is arranged in the shell (27), and the plate bundle (28) is arranged in the shellA wire mesh demister assembly is arranged above the shell, the assembly and part of the shell (27) form a cavity which is communicated with the shell side outlet (8B), and the cavity is communicated with the cavity where the shell inner plate bundle (28) is arranged through the wire mesh demister assembly.
5. A process for industrial CO as described in claim 4 2 The cold source system of liquefaction device, its characterized in that: the wire mesh foam remover component consists of an inverted V-shaped wire mesh foam remover (25) and two fan-shaped thin steel plates (26) welded at two ends of the wire mesh foam remover (25).
6. An industrial CO according to claim 1 2 The cold source system of liquefaction device, its characterized in that: the self-contained gas separation plate-shell type CO 2 The condensing evaporator (8) is composed of shell-and-tube CO 2 Condensing evaporator or plate type CO 2 The condensing evaporator is replaced by a shell-and-tube CO 2 When condensing the evaporator, the compressor cold source system (22) and the shell-and-tube CO 2 Shell side inlet of condensing evaporator is connected, shell-and-tube CO 2 The pipe side inlet of the condensing evaporator is connected to the CO through a gas pipeline 2 On the gas outlet of the liquid storage barrel (11), a shell-and-tube CO 2 The pipe side outlet of the condensing evaporator is connected to the CO through a liquid pipeline 2 On the liquid inlet of the liquid storage barrel (11), CO 2 The liquid outlet of the liquid storage barrel (11) is connected with the liquid storage barrel through CO 2 The canned motor pump is connected with a cold equipment system (24); when in plate type CO 2 When condensing the evaporator, the compressor cold source system (22) and the plate type CO 2 The cold side inlet of the condensing evaporator is connected with the plate type CO 2 The hot side inlet in condensing the evaporator is connected to the CO by a gas line 2 Plate-type CO on the gas outlet of the liquid storage barrel (11) 2 The hot side outlet of the condensing evaporator is connected to the CO through a liquid line 2 On the liquid inlet of the liquid storage barrel (11), CO 2 The liquid outlet of the liquid storage barrel (11) is connected with the liquid storage barrel through CO 2 The canned motor pump is connected to a cold appliance system (24).
7. A method according to claim 3Be used for industry CO 2 The cold source system of liquefaction device, its characterized in that: the CO 2 The liquid outlet (11A) of the liquid storage barrel (11) is connected with the CO through a liquid pipeline 2 The shield pumps (12) are then connected to: -a subcooler flow control valve (15), into a subcooler (18), a liquefier flow control valve (16), into a liquefier (19), and a top condenser flow control valve (17), into a top condenser (20).
8. A method for industrial CO according to claim 3 2 The cold source system of liquefaction device, its characterized in that: the outlets of the subcooler (18), the liquefier (19) and the tower top condenser (20) are connected to CO through a gas-liquid two-phase fluid pipeline after being combined 2 A gas-liquid inlet (11B) of the liquid storage barrel (11).
9. An industrial CO according to claim 2 2 The cold source system of liquefaction device, its characterized in that: the screw compressor (1) is in the form of a single-machine double-stage screw compressor, a double-machine double-stage screw compressor or a single-stage screw compressor with an economizer; at least one of the compressors is frequency conversion or fixed frequency.
10. An industrial CO according to claim 2 2 The cold source system of liquefaction device, its characterized in that: the condenser (3) is an evaporative condenser, a water-cooled condenser or an air-cooled condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222436564.2U CN219415431U (en) | 2022-09-14 | 2022-09-14 | Be used for industry CO 2 Cold source system of liquefying device |
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| CN202222436564.2U CN219415431U (en) | 2022-09-14 | 2022-09-14 | Be used for industry CO 2 Cold source system of liquefying device |
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| CN219415431U true CN219415431U (en) | 2023-07-25 |
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