CN209326155U - A kind of propane refrigeration system refrigeration compressor inlet pressure control device - Google Patents
A kind of propane refrigeration system refrigeration compressor inlet pressure control device Download PDFInfo
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- CN209326155U CN209326155U CN201821774710.XU CN201821774710U CN209326155U CN 209326155 U CN209326155 U CN 209326155U CN 201821774710 U CN201821774710 U CN 201821774710U CN 209326155 U CN209326155 U CN 209326155U
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Abstract
The utility model provides a kind of propane refrigeration system refrigeration compressor inlet pressure control device, the device includes gas phase reflux pipeline, one-level pressure relief valve, pressure gauge after one-level pressure relief valve, second depressurized valve and second depressurized valve pressure gauge, the gas phase reflux pipeline is connected between the high pressure vapor pipeline of propane refrigeration system and low-pressure vapor phase pipeline, the one-level pressure relief valve, pressure gauge after the one-level pressure relief valve, the second depressurized valve and the second depressurized valve pressure gauge are connected in turn on the gas phase reflux pipeline, the inlet pressure of propane refrigeration system compressor is automatically adjusted by the gas phase reflux pipeline by the one-level pressure relief valve and the second depressurized valve.The device guarantees the case where system is not in negative-pressure operation in process of refrigerastion, avoids refrigeration system from the generation of the case where superpressure and frozen block occur, guarantees the safety in production of purifying device for natural gas.
Description
Technical field
The utility model relates to refrigeration system control technology fields, especially relate to a kind of propane refrigeration system refrigeration pressure
Contracting machine inlet pressure control device.
Background technique
It needs to cool down to raw natural gas during carrying out natural gas processing using condensation method, by the temperature of unstripped gas
Degree separates the heavy constituents such as propane, butane, pentane in raw natural gas after being reduced to subzero 80 DEG C to obtain qualification
The products such as commercial natural gas, oil liquefied gas, light oil.
Following several method is generallyd use in this process of refrigerastion: first is that expander refrigeration, second is that cryogen refrigeration, third is that
Expanding machine adds cryogen hybrid refrigeration.
During expanding machine adds cryogen refrigeration in natural gas processing station using it is more be that expanding machine adds propane cryogen system
It is cold.Process of refrigerastion is that raw natural gas is cooled down by preliminary separation and after over-molecular sieve depth drying by propane refrigerant
To -35 DEG C, then expanded machine is cooled to -80 DEG C, so that the heavy constituent of propane or more is isolated, by the lighter hydrocarbons in raw natural gas
Recycling, realizes the purification of natural gas.The critical process that propane refrigeration system is entire production process is controlled in this course,
Controlling propane refrigeration system namely will be cooled to -35 DEG C or so natural gas using propane cryogen by propane evaporator,
Keep stable cryogenic temperature control the evaporating pressure that will adjust system, evaporating temperature, condensation temperature, condensing pressure,
Liquid supply rate, and crucially how system controlled by the inspiratory capacity of compressor and the liquid supply rate of propane evaporator in these parameters
Cold temperature.
In the actual production process since the variation of unit capacity, the variation in season spring, summer, autumn and winter cause the need of refrigerating capacity
It asks variation very big, is often fluctuated between entire refrigeration system 20%-100%, operative employee is frequently in adjustment refrigerant feed liquid
It measures with refrigeration compressor air suction amount and guarantees balance between the two, but due to being manual operation, still often result in evaporation
Hypertonia is too low.Evaporating pressure is excessively high to make the high refrigerating efficiency of cryogenic temperature low；Evaporating pressure is too low to will cause compression
Machine entrance negative pressure can if things go on like this admit air into refrigeration system, and causing refrigeration system superpressure, (air is not in refrigeration systems
Solidifying gas) and frozen block (air can be the steam in air together in people's system) seriously affect the normal operation of refrigerating plant.For
This solves the above technology we have invented a kind of a kind of new propane refrigeration system refrigeration compressor inlet pressure control device
Problem.
Summary of the invention
The purpose of the utility model is to provide one kind to ensure entrance pressure within the scope of propane compressor rated discharge amount always
A kind of constant propane refrigeration system refrigeration compressor inlet pressure control device in optimum pressure of power.
The purpose of this utility model can be achieved by the following technical measures: a kind of propane refrigeration system refrigeration compressor enters
Mouthful pressure control device, a kind of propane refrigeration system refrigeration compressor inlet pressure control device include gas phase reflux pipeline,
Pressure gauge, second depressurized valve and second depressurized valve pressure gauge after one-level pressure relief valve, one-level pressure relief valve, gas phase reflux pipeline connection
Between the high pressure vapor pipeline and low-pressure vapor phase pipeline of propane refrigeration system, pressed after the one-level pressure relief valve, the one-level pressure relief valve
Power table, the second depressurized valve and the second depressurized valve pressure gauge are connected in turn on the gas phase reflux pipeline, propane refrigeration system
The inlet pressure of compressor is automatically adjusted by the gas phase reflux pipeline by the one-level pressure relief valve and the second depressurized valve.
The purpose of this utility model can be also achieved by the following technical measures:
The one-level pressure relief valve includes the first adjuster, passes through first adjuster and observes pressure after the one-level pressure relief valve
Table adjusts the downstream pressure of the one-level pressure relief valve to 0.2-0.4MPa.
The one-level pressure relief valve is Self-operated pressure reducing valve.
The second depressurized valve includes the second adjuster, passes through second adjuster and observes the second depressurized valve pressure gauge,
The downstream pressure of the second depressurized valve is adjusted to 5-8KPa.
The second depressurized valve is Self-operated pressure reducing valve.
One of the utility model propane refrigeration system refrigeration compressor inlet pressure control device, in propane compressor
Always ensure that inlet pressure is constant in optimum pressure within the scope of rated discharge amount, prevent propane compressor negative-pressure operation completely.By
Two-stage Self-driven pressure-adjusting valve constitutes compressor inlet pressure systems stabilisation, and labor intensity of operating staff is greatly reduced, and improves operation
Precision.When propane compressor disastershutdown, pressure regulator valve is voluntarily closed, and not will cause total system superpressure.
Detailed description of the invention
Fig. 1 is an a kind of specific reality of propane refrigeration system refrigeration compressor inlet pressure control device of the utility model
Apply the structure chart of example.
Specific embodiment
To enable the above and other objects, features and advantages of the utility model to be clearer and more comprehensible, it is cited below particularly out preferably
Embodiment, and cooperate shown in attached drawing, it is described in detail below.
As shown in FIG. 1, FIG. 1 is a kind of propane refrigeration system refrigeration compressor inlet pressure control devices of the utility model
Structure chart.A kind of propane refrigeration system refrigeration compressor inlet pressure control device is relied on oneself by gas phase reflux pipeline 8, level-one
Pressure gauge 10, second level Self-operated pressure reducing valve 11, second level Self-operated pressure reducing valve pressure after formula pressure reducing valve 9, level-one Self-operated pressure reducing valve
Table 12 forms.
When propane refrigeration system operates normally, gaseous propane is pressurized to condensation pressure by refrigeration compressor 1 by propane refrigerant
Power delivers into condenser 3 by the high pressure vapor pipeline 2 of refrigeration compressor to condenser, into condenser 3 after gaseous propane
It is condensed into LPG, enters propane evaporator by the liquid phase pipeline 4 of condenser to evaporator and after the throttling of supplying valve 5
6, LPG is evaporated to gaseous propane through evaporator to compressor low-pressure vapor phase after absorbing the heat of natural gas in evaporator 6
Pipeline 7 returns to refrigeration compressor 1 and completes a refrigeration cycle.
The utility model has newly increased gas phase reflux pipeline 8, gas phase reflux pipeline 8 be connected to high pressure vapor pipeline 2 with it is low
It presses between vapor delivery line 7, pressure gauge 10, second level Self-operated pressure reducing valve after level-one Self-operated pressure reducing valve 9, level-one Self-operated pressure reducing valve
11 and second level Self-operated pressure reducing valve pressure gauge 12 be sequentially located on the gas phase reflux pipeline 8, the inlet pressure of compressor can all lead to
The gas phase reflux pipeline 8 from high pressure vapor pipeline 2 to low-pressure vapor phase pipeline 7 is crossed to be adjusted automatically by two-stage Self-driven pressure-adjusting valve group
It is whole.
The downstream pressure of level-one Self-operated pressure reducing valve 9 is passed through into the adjuster of pressure reducing valve before adjusting refrigerating capacity and observes level-one
Pressure gauge 10 is adjusted to 0.2-0.4MPa after Self-operated pressure reducing valve, and the downstream pressure of second level Self-operated pressure reducing valve 11 is passed through decompression
The adjuster of valve simultaneously observes second level Self-operated pressure reducing valve pressure gauge 12 and is adjusted to 5-8KPa, when needing to adjust refrigerating capacity, operation
When work opens inspiratory capacity that is big or turning down supplying valve 5, increase or reduction propane refrigeration compressor 1, the inlet pressure of compressor all can
5-8KPa is automatically adjusted to by two-stage Self-driven pressure-adjusting valve group by high pressure vapor to low-pressure vapor phase reflux pipeline 8, that is, when
Level-one Self-operated pressure reducing valve 9 and second level Self-operated pressure reducing valve 11 turn down automatically when 7 pressure of low-pressure vapor phase pipeline is higher than 5-8KPa, when
Self-driven pressure-adjusting valve is opened greatly automatically when 7 pressure of low-pressure vapor phase pipeline is lower than 5-8KP, to guarantee that system will not go out in process of refrigerastion
The case where existing negative-pressure operation, avoids refrigeration system from the generation of the case where superpressure and frozen block occur, guarantees the safety of purifying device for natural gas
Production.
In addition, self-contained pressure regulator have without external force using before and after valve pressure difference and the included spring of valve make
For before power automatic regulating valve or the function of downstream pressure, compressor no longer air-breathing when propane compressor disastershutdown and evaporator
Also in feed flow, this will cause the rising of 7 pressure of low-pressure vapor phase pipeline, when pressure rises to the pressure of self-contained pressure regulator setting
When regulating valve can turn down automatically until complete close.When propane compressor disastershutdown, pressure regulator valve is voluntarily closed, and not will cause total system
Superpressure.
Claims (5)
1. a kind of propane refrigeration system refrigeration compressor inlet pressure control device, which is characterized in that a kind of propane refrigeration system
Controlling cold compressor inlet pressure control device includes pressure gauge, two after gas phase reflux pipeline, one-level pressure relief valve, one-level pressure relief valve
Grade pressure reducing valve and second depressurized valve pressure gauge, the gas phase reflux pipeline be connected to the high pressure vapor pipeline of propane refrigeration system with it is low
It presses between vapor delivery line, pressure gauge, the second depressurized valve and the second depressurized valve pressure after the one-level pressure relief valve, the one-level pressure relief valve
Power table is connected in turn on the gas phase reflux pipeline, and the inlet pressure of propane refrigeration system compressor passes through the gas phase reflux pipeline
It is automatically adjusted by the one-level pressure relief valve and the second depressurized valve.
2. a kind of propane refrigeration system refrigeration compressor inlet pressure control device according to claim 1, feature exist
In the one-level pressure relief valve includes the first adjuster, passes through first adjuster and observes pressure gauge after the one-level pressure relief valve, by this
The downstream pressure of one-level pressure relief valve is adjusted to 0.2-0.4MPa.
3. a kind of propane refrigeration system refrigeration compressor inlet pressure control device according to claim 1, feature exist
In the one-level pressure relief valve is Self-operated pressure reducing valve.
4. a kind of propane refrigeration system refrigeration compressor inlet pressure control device according to claim 1, feature exist
Include the second adjuster in, the second depressurized valve, pass through second adjuster and observe the second depressurized valve pressure gauge, by this two
The downstream pressure of grade pressure reducing valve is adjusted to 5-8KPa.
5. a kind of propane refrigeration system refrigeration compressor inlet pressure control device according to claim 1, feature exist
In the second depressurized valve is Self-operated pressure reducing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821774710.XU CN209326155U (en) | 2018-10-23 | 2018-10-23 | A kind of propane refrigeration system refrigeration compressor inlet pressure control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821774710.XU CN209326155U (en) | 2018-10-23 | 2018-10-23 | A kind of propane refrigeration system refrigeration compressor inlet pressure control device |
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| CN209326155U true CN209326155U (en) | 2019-08-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115704644A (en) * | 2021-08-10 | 2023-02-17 | 中国石油天然气股份有限公司 | LNG liquefaction device and control method thereof |
-
2018
- 2018-10-23 CN CN201821774710.XU patent/CN209326155U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115704644A (en) * | 2021-08-10 | 2023-02-17 | 中国石油天然气股份有限公司 | LNG liquefaction device and control method thereof |
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