CN114508692A - Ethylene unloading system and unloading method - Google Patents

Ethylene unloading system and unloading method Download PDF

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Publication number
CN114508692A
CN114508692A CN202210171007.4A CN202210171007A CN114508692A CN 114508692 A CN114508692 A CN 114508692A CN 202210171007 A CN202210171007 A CN 202210171007A CN 114508692 A CN114508692 A CN 114508692A
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ethylene
unloading
steam
temperature
pressure
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CN202210171007.4A
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CN114508692B (en
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刘胜
刘佳
谷庭宇
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Jiangsu Zhongjian Engineering Design Research Institute Co ltd
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Jiangsu Zhongjian Engineering Design Research Institute Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/005—Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • F17C5/04—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases requiring the use of refrigeration, e.g. filling with helium or hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352—Pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/013—Single phase liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F17C2227/0323—Heat exchange with the fluid by heating using another fluid in a closed loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0339—Heat exchange with the fluid by cooling using the same fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/044—Methods for emptying or filling by purging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0626—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0631—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/031—Dealing with losses due to heat transfer
    • F17C2260/032—Avoiding freezing or defrosting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/063—Fluid distribution for supply of refueling stations

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses an ethylene unloading system and an unloading method, and the ethylene unloading system comprises an ethylene heater, a barrel pump, a steam system, a low-temperature ethylene pipeline and a DCS control system, wherein the ethylene heater comprises a shell, two ends of the shell are fixedly provided with a low-temperature ethylene tube pass and a steam tube pass, one ends of the low-temperature ethylene tube pass and the steam tube pass are both fixedly provided with coil pipes, and the steam tube pass is fixedly provided with a condensation water gap and a steam port; the invention adopts a double-shell-pass ethylene heater, methanol steam in the upper shell pass heats low-temperature ethylene, so that the temperature of the ethylene reaches about-35 ℃ from-100 to-90 ℃, and the temperature of the ethylene can be controlled to keep constant because the temperature of the methanol steam reaches the saturated steam, and the water steam is used for heating the methanol, so that the phenomenon of icing in the ethylene heater can be avoided.

Description

Ethylene unloading system and unloading method
Technical Field
The invention relates to the technical field of ethylene unloading systems, in particular to an ethylene unloading system and an unloading method.
Background
At present, domestic ethylene transportation is mostly carried by tank cars, the temperature of a low-pressure tank car is-103 ℃, the tank cars are of stainless steel double-layer high-vacuum heat insulation structures, a low-temperature ethylene unloading device of an ethylene production device generally adopts a multi-group air heater mode to heat low-temperature ethylene, an unloading pump selected by the low-temperature ethylene unloading device is a low-temperature vertical multi-stage shielding pump, and the multi-group air heater mode is generally adopted to heat the low-temperature ethylene.
However, in the current domestic low-temperature ethylene unloading device, a plurality of groups of air heaters are adopted to heat low-temperature ethylene in an ethylene transport tank car from-103 ℃ to about-35 ℃, and the plurality of groups of heaters are operated, so that on one hand, the ethylene temperature is not easy to control, on the other hand, the freezing of a heat exchanger can influence the heat exchange effect, the operation difficulty and risk are increased, and the environmental sanitation of a site can be influenced by the ice melting.
Disclosure of Invention
The present invention is directed to an ethylene unloading system and an unloading method, which solve the above problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: an ethylene unloading system and an unloading method comprise:
the ethylene heater comprises a shell, wherein a low-temperature ethylene tube pass and a steam tube pass are fixedly installed at two ends of the shell, coil pipes are fixedly installed at one ends of the low-temperature ethylene tube pass and the steam tube pass, and a condensation water port and a steam port are fixedly installed on the steam tube pass;
a cartridge pump;
a steam system;
a low temperature ethylene line;
a DCS control system;
the steam system is communicated with the steam port, the output end of the low-temperature ethylene pipeline is communicated with the ethylene input end of the low-temperature ethylene pipe pass, and the DCS is electrically connected with the barrel pump and the steam system respectively.
Preferably, the steam system comprises a steam pipeline, the output end of the steam pipeline is communicated with the steam port, and the steam pipeline is further fixedly connected with a steam temperature and pressure reducer and a cooling water pipeline.
Preferably, the method further comprises the following steps:
the crane pipe unloads, the crane pipe unloads is equipped with a plurality of, crane pipe upper reaches liquid phase part passes through the pipe connection low temperature ethylene tank wagon that unloads, crane pipe low reaches liquid phase part passes through the input of pipe connection barrel bag pump that unloads.
Preferably, the method further comprises the following steps:
an ethylene line;
one end of the ethylene pipeline is communicated with an ethylene output end on a low-temperature ethylene tube pass, and the other end of the ethylene pipeline is communicated with an input end of an ethylene ball tank.
Preferably, the method further comprises the following steps:
a vapor conditioning system comprising a methanol pressure sensor, an ethylene temperature sensor, and a vapor conditioning valve;
the methanol pressure sensor and the ethylene temperature sensor are both fixedly arranged in the shell, and the steam regulating valve is fixedly arranged on the steam pipeline.
Preferably, the method further comprises the following steps:
an ethylene regulation system comprising an ethylene pressure sensor and an ethylene regulation valve;
the ethylene pressure sensor is fixedly arranged on the shell, and the ethylene regulating valve is fixedly arranged on the low-temperature ethylene pipeline.
Preferably, the method further comprises the following steps:
a steam condensate line;
wherein, intercommunication each other between steam condensate water pipeline input and the condensation mouth of a river.
Preferably, the top end of the shell is fixedly provided with an exhaust port, and the bottom end of the shell is fixedly provided with a methanol filling port.
An ethylene unloading method comprising the steps of:
s1, dry replacement: before unloading, firstly, performing nitrogen replacement and drying on an unloading device and a pipeline, analyzing that the oxygen content is less than 0.1 percent, the dew point is lower than-70 ℃, and after the temperature is qualified, releasing the pressure to the micro positive pressure;
s2, nitrogen back replacement and precooling: when unloading for the first time, firstly connecting a tank car gas-phase pipe orifice flange with an unloading pipeline, carrying out reverse displacement and precooling on nitrogen of an unloading system by using tank car gas-phase ethylene, enabling ethylene to enter an ethylene spherical tank through the unloading system, then discharging the gas-phase ethylene into a torch through a discharge pipeline valve at the bottom of the ethylene spherical tank, synchronously carrying out reverse displacement on the nitrogen in the ethylene spherical tank, adopting a step pressure expansion displacement method, sampling and analyzing the nitrogen content to be less than or equal to 10mg/L, pressurizing to 2.0MPa, and ensuring that the reverse displacement nitrogen of an unloading device and an ethylene spherical tank group is qualified;
s3, pre-cooling of a spherical tank: after nitrogen is reversely replaced by the unloading device and the ethylene spherical tank group to be qualified, a liquid phase port of the ethylene tank car is connected with an unloading pipeline, liquid phase precooling is carried out on an unloading pump, a flare valve at an outlet of the pump is slightly opened in the liquid phase precooling process of the unloading pump, the liquid phase precooling and cooling speed is controlled to be about 5 ℃/h until the temperature of the unloading pump reaches about-90 ℃, when the temperature of the unloading pump is close to that of liquid phase ethylene in the tank car, precooling of the unloading pump is finished, after the unloading pump is qualified, the pressure of methanol in an ethylene heater is set to be 70-100KPA according to the principle of firstly feeding steam and then feeding ethylene, automatic operation is carried out, low temperature ethylene enters the heater through the ethylene unloading pump by means of tank car static pressure, the flow of gas phase ethylene at the temperature higher than-20 ℃ at the outlet of the heater is regulated by the outlet valve of the heater, the pressure of the spherical tank is boosted, when the pressure is boosted to 1.6MPa (when the gauge pressure is increased, a set is started to return the liquid phase ethylene condensed in the liquid phase ethylene in the spherical tank from a feeding line at the bottom of the spherical tank, slowly pre-cooling the spherical tank until the temperature of the tank bottom reaches about-35 ℃ by adjusting the load of the refrigerator and controlling the liquid phase cooling speed to be about 5 ℃/h;
s4, unloading liquid-phase ethylene into a ball tank: under the liquid phase precooling working condition of the unloading system, confirming that the tank wagon is pressurized to 0.3MPa, opening a reverse circulation exhaust return pump inlet valve of an unloading pump, confirming that the unloading pump is precooled to about minus 90 ℃, starting an ethylene unloading pump, controlling the outlet pressure to be 2.2MPa through a pump outlet valve, controlling the pressure before a valve to be 1.7-1.6MPa by adjusting the opening of an outlet valve of an ethylene heater, controlling the temperature of the ethylene when the ethylene exits the heater to be minus 30-35 ℃ by adjusting the pressure of methanol of the heater to be 70-100KPa, keeping the outlet of the unloading ethylene heater smooth with a spherical tank liquid phase feeding pipe, and safely storing the liquid phase ethylene which reaches minus 35 ℃ and 1.6MPa in the spherical tank through the unloading system.
Preferably, the methanol temperature of the ethylene heater is controlled to be 60-70 ℃, and the pressure is controlled to be 70-100 KPa.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts a double-shell-pass ethylene heater, methanol in the ethylene heater is used for heating a heating medium of ethylene, a steam tube pass for heating the methanol and a low-temperature ethylene tube pass for absorbing the heat of methanol steam are both in a U-shaped tube form, the steam in the lower shell pass heats the methanol to enable the methanol to generate saturated steam, the temperature reaches 60-70 ℃, the methanol steam in the upper shell pass heats the low-temperature ethylene to enable the temperature of the ethylene to reach about-35 ℃ from-100 ℃ to-90 ℃, and the temperature of the ethylene can be controlled to be constant because the temperature of the methanol steam reaching the saturated steam can be kept constant, so that the temperature of the ethylene can be kept constant, and the water steam is used for heating the methanol and can not generate an icing phenomenon in the ethylene heater.
2. The invention adopts the barrel pump with smaller cavitation allowance, which is beneficial to unloading.
Drawings
FIG. 1 is an overall process flow diagram of the present invention;
FIG. 2 is a schematic diagram of an ethylene heater configuration according to the present invention;
FIG. 3 is a process flow diagram of the steam system of the present invention.
In the figure: a 10-ethylene heater; 11-a housing; 12-low temperature ethylene tube pass; 13-steam tube pass; 14-a coil pipe; 15-condensation water gap; 16-a steam port; 17-methanol filling port; 18-an exhaust port; 20-cartridge pump; 30-unloading crane pipe; a 40-ethylene line; 50-a steam system; 51-a steam pipeline; 52-steam temperature and pressure reduction device; 53-cooling water line; 60-a steam conditioning system; 70-an ethylene conditioning system; 80-low temperature ethylene line; 90-steam condensate line.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1-3, the present invention provides a technical solution: the ethylene unloading system comprises an ethylene heater 10, a barrel pump 20, two unloading crane pipes 30, an ethylene pipeline 40, a steam system 50, a steam regulating system 60, an ethylene regulating system 70, a low-temperature ethylene pipeline 80, a steam condensate pipeline 90 and a DCS control system.
Wherein, the DCS control system has the following functions:
the control scheme is as follows:
1. and (3) controlling the steam of the heater: the steam regulating valve and the heater temperature form PID single loop regulation; the steam pressure displays the alarm function and does not participate in interlocking and control.
2. Ethylene unloading flow control: the ethylene regulating valve and the outlet ethylene pressure of the heater form PID single-loop regulation (whether a pump needs to participate in the regulation loop or not needs to be considered here, the opening degree of the regulating valve is small, the pump is not provided with the regulating valve, whether the safety is influenced or not, and the possibility of ethylene pressure building in the pipeline is avoided).
3. And (4) considering whether the ethylene pressure at the outlet of the heater participates in steam regulation or not, such as automatically reducing the opening degree of a high-pressure steam regulating valve.
The interlocking scheme is as follows:
1. the steam input end of the heater is provided with a pneumatic cut-off valve which is interlocked with the temperature of the heater, and the high-temperature interlock closes the pneumatic cut-off valve at the steam input end; and the temperature is simultaneously set with a low limit interlock and a low temperature interlock parking and unloading pump.
2. The pressure of ethylene at the outlet of the heater is interlocked, the pressure is high, the unloading pump is locked, and the steam pneumatic cut-off valve of the heater is closed.
The ethylene heater 10 comprises a shell 11, a low-temperature ethylene tube pass 12 and a steam tube pass 13 are fixedly mounted at two ends of the shell 11, a coil 14 is fixedly mounted at one end of the low-temperature ethylene tube pass 12 and one end of the steam tube pass 13, and a condensation water gap 15 and a steam port 16 are fixedly mounted on the steam tube pass 13.
Wherein, steam system 50 and steam port 16 intercommunication each other, and the ethylene input end of low temperature ethylene pipeline 80 output and low temperature ethylene tube side 12 intercommunication each other, DCS control system respectively with barrel bag pump 20 with steam system 50 between the electric connection.
Wherein, steam system 50 includes steam conduit 51, communicates each other between steam conduit 51 input and the intermediate pressure steam system in ethylene plant district, communicates each other between steam conduit 51 output and the steam port 16, still fixedly connected with steam pressure reducer 52 and cooling water pipeline 53 on the steam conduit 51.
Further, the medium pressure steam is converted into low pressure steam by the steam temperature and pressure reducing device 52, and the cooling water line 53 is used to spray water into the medium pressure steam, so that the steam is subjected to temperature and pressure reduction and converted into low temperature and low pressure steam.
Wherein, the liquid phase part at the upstream of the unloading crane pipe 30 is connected with the low-temperature ethylene tank wagon through a pipeline, the liquid phase part at the downstream of the unloading crane pipe 30 is combined into 1 path through 2 paths and enters the inlet of the barrel bag pump, the reverse circulation gas of the gas phase part of the barrel bag pump enters the gas phase port of the crane pipe and then enters the gas phase space of the ethylene tank wagon.
Wherein, one end of the ethylene pipeline 40 is communicated with the ethylene output end on the low-temperature ethylene tube side 12, and the other end of the ethylene pipeline 40 is communicated with the input end of the ethylene ball tank.
The steam conditioning system 60 includes, among other things, a methanol pressure sensor, an ethylene temperature sensor, and a steam conditioning valve.
Further, the steam regulating system 60 controls the ethylene temperature by measuring the methanol pressure in the ethylene heater and the ethylene temperature at about 35 ℃ from the ethylene heater, and regulating the flow rate of the steam by the steam regulating valve.
Wherein, methanol pressure sensor and ethylene temperature sensor are all fixed mounting in shell 11, and steam control valve fixed mounting is on steam pipe 51.
The ethylene regulation system 70 includes, among other things, an ethylene pressure sensor and an ethylene regulation valve.
Further, the ethylene regulating system 70 measures the pressure of ethylene at about 35 ℃ from the ethylene heater, and regulates the flow rate of ethylene by the ethylene regulating valve to control the ethylene temperature.
Wherein, the ethylene pressure sensor is fixedly arranged on the shell 11, and the ethylene regulating valve is fixedly arranged on the low-temperature ethylene pipeline 80.
Wherein, the input end of the steam condensation water pipeline 90 is communicated with the condensation water port 15.
Wherein, the top end of the shell 11 is fixedly provided with an exhaust port 18, and the bottom end of the shell 11 is fixedly provided with a methanol filling port 17.
The working principle is as follows: when the automobile is unloaded for the first time, outsourcing methanol is sent into an ethylene heater by a pneumatic diaphragm pump and is used as a heating medium for heating ethylene in the ethylene heater, a steam tube pass 13 for heating the methanol and a low-temperature ethylene tube pass 12 for absorbing the heat of methanol steam are both in a U-shaped tube form, the steam in a shell 11 heats the methanol to generate saturated steam, the temperature reaches 60-70 ℃, the methanol steam in the shell 11 heats low-temperature ethylene, the temperature of the ethylene reaches about-35 ℃ from-100 ℃ to-90 ℃, a steam system 50 is connected with the ethylene heater 10, the steam comes from a medium-pressure steam system in an ethylene device area, the medium-pressure steam is converted into low-pressure steam through a steam temperature and pressure reducing device 52, a cooling water pipeline 53 is used for spraying water into the medium-pressure steam to reduce the temperature and the pressure of the steam into low-temperature and low-pressure steam, and the steam enters the ethylene heater, the condensed water of the steam is discharged into a steam condensed water pipeline 90, ethylene at the temperature of minus 100 ℃ to minus 90 ℃ is pumped into an ethylene heater by a barrel bag pump, the ethylene is converted into ethylene at the temperature of about minus 35 ℃ by heating, and the ethylene is sent to an ethylene ball tank area through an ethylene pipeline 40 and is pumped into an ethylene ball tank.
Example 2:
referring to fig. 1-3, the present invention provides a technical solution: an ethylene unloading method comprising the steps of:
s1, dry replacement: before unloading, firstly, performing nitrogen replacement and drying on an unloading device and a pipeline, analyzing that the oxygen content is less than 0.1 percent, the dew point is lower than-70 ℃, and after the temperature is qualified, releasing the pressure to the micro positive pressure;
s2, nitrogen back replacement and precooling: when the car is unloaded for the first time, the tank car gas-phase pipe orifice flange is firstly connected with an unloading pipeline, nitrogen in an unloading system is subjected to reverse displacement and precooling by using tank car gas-phase ethylene (liquid ethylene in a gasifier is gasified by a supercharger arranged on the tank car, and the tank car gas-phase pressure is improved), ethylene enters a spherical tank through the unloading system, and then the gas-phase ethylene is discharged into a torch through a discharge pipeline valve at the bottom of the ethylene spherical tank to synchronously perform reverse displacement on the nitrogen in the spherical tank. Adopting a step pressure expansion replacement method, sampling and analyzing that the nitrogen content is less than or equal to 10mg/L, pressurizing to 2.0MPa, and ensuring that the nitrogen is qualified by reverse replacement of an unloading device and an ethylene ball tank set;
s3, pre-cooling of a spherical tank: after nitrogen is reversely replaced by the unloading device and the ethylene spherical tank group to be qualified, a liquid phase port of the ethylene tank car is connected with an unloading pipeline, liquid phase precooling is carried out on an unloading pump, a flare valve at an outlet of the pump is slightly opened in the liquid phase precooling process of the unloading pump, the liquid phase precooling and cooling speed is controlled to be about 5 ℃/h until the temperature of the unloading pump reaches about-90 ℃, when the temperature of the unloading pump is close to that of liquid phase ethylene in the tank car, precooling of the unloading pump is finished, after the unloading pump is qualified, the pressure of methanol in an ethylene heater is set to be 70-100KPA according to the principle of firstly feeding steam and then feeding ethylene, automatic operation is carried out, low temperature ethylene enters the heater through the ethylene unloading pump by means of tank car static pressure, the flow of gas phase ethylene at the temperature higher than-20 ℃ at the outlet of the heater is regulated by the outlet valve of the heater, the pressure of the spherical tank is boosted, when the pressure is boosted to 1.6MPa (when the gauge pressure is increased, a set is started to return the liquid phase ethylene condensed in the liquid phase ethylene in the spherical tank from a feeding line at the bottom of the spherical tank, slowly pre-cooling the spherical tank until the temperature of the tank bottom reaches about-35 ℃ by adjusting the load of the refrigerator and controlling the liquid phase cooling speed to be about 5 ℃/h;
s4, unloading liquid-phase ethylene into a ball tank: under the liquid phase precooling working condition of the unloading system, confirming that the tank wagon is pressurized to 0.3MPa (gauge pressure), opening an inlet valve of a reverse circulation exhaust return pump of an unloading pump, confirming that the unloading pump is precooled to about-90 ℃, starting an ethylene unloading pump, controlling outlet pressure (gauge pressure) to be 2.2MPa through an outlet valve of the pump, controlling the pressure before the valve to be 1.7-1.6MPa (gauge pressure) by adjusting the opening of an outlet valve of an ethylene heater, and controlling the temperature of the ethylene when the ethylene exits the heater to be-30-35 ℃ by adjusting the pressure of methanol of the heater to be within the range of 70-100 KPa. The outlet of the unloading ethylene heater is kept smooth with the liquid phase feeding pipe of the spherical tank, so that the liquid phase ethylene with the ethylene temperature of-35 ℃ and the ethylene pressure of 1.6MPa is safely stored in the spherical tank through an unloading system.
Wherein the ethylene unloading heater is provided with an ethylene outlet low-temperature linkage, and when the temperature is reduced to-40 ℃, the ethylene unloading pump is closed in a linkage manner.
Wherein, the in-process of unloading, the temperature is controlled steadily as far as possible, prevents that the high temperature from appearing and crossing low excessively, and the high temperature can cause the spherical tank superpressure, and the low temperature can damage the material of spherical tank and pipeline excessively.
Wherein, the outlet of the ethylene heater is prevented from generating low temperature (-40 ℃), the inlet regulating valve of the ethylene heater needs to realize chain protection to cut off the ethylene feeding of the heat exchanger, and the unloading pump is closed.
Wherein, the methanol temperature of the ethylene heater is controlled at 60-70 ℃, the pressure is controlled at 70-100KPa, the control of the whole system is reasonable, and if the overpressure closes the emergency cut-off valve of the steam inlet in front of the temperature and pressure reducing device.
In combination with the above embodiment, the invention adopts a double-shell ethylene heater, methanol in the ethylene heater is used for heating the heating medium of ethylene, the steam tube pass for heating methanol and the low-temperature ethylene tube pass for absorbing the heat of methanol steam are both in a U-shaped tube form, the steam in the lower shell pass heats methanol to generate saturated steam, the temperature reaches 60-70 ℃, the methanol steam in the upper shell pass heats low-temperature ethylene, the temperature of ethylene reaches about-35 ℃ from-100 ℃ to-90 ℃, and the temperature of the methanol steam reaches the saturated steam, so that the temperature of ethylene can be controlled to be kept constant, and the water steam is used for heating methanol and can not generate an icing phenomenon in the ethylene heater.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. Ethylene unloading system characterized in that, includes:
the ethylene heater (10) comprises a shell (11), a low-temperature ethylene tube pass (12) and a steam tube pass (13) are fixedly installed at two ends of the shell (11), a coil (14) is fixedly installed at one end of each of the low-temperature ethylene tube pass (12) and the steam tube pass (13), and a condensation water gap (15) and a steam port (16) are fixedly installed on the steam tube pass (13);
a pouch pump (20);
a steam system (50);
a low temperature ethylene line (80);
a DCS control system;
the steam system (50) is communicated with the steam port (16), the output end of the low-temperature ethylene pipeline (80) is communicated with the ethylene input end of the low-temperature ethylene tube pass (12), and the DCS is electrically connected with the barrel bag pump (20) and the steam system (50) respectively.
2. The ethylene unloading system of claim 1, wherein: the steam system (50) comprises a steam pipeline (51), the output end of the steam pipeline (51) is communicated with the steam port (16), and the steam pipeline (51) is also fixedly connected with a steam temperature and pressure reducer (52) and a cooling water pipeline (53).
3. The ethylene unloading system of claim 1, wherein: further comprising:
the unloading crane pipe (30), unloading crane pipe (30) are equipped with a plurality of, unloading crane pipe (30) upper reaches liquid phase part passes through the low temperature ethylene tank wagon of tube coupling, the input of tube coupling barrel bag pump (20) is passed through to unloading crane pipe (30) low reaches liquid phase part.
4. The ethylene unloading system of claim 1, wherein: further comprising:
an ethylene line (40);
one end of the ethylene pipeline (40) is communicated with an ethylene output end on the low-temperature ethylene tube pass (12), and the other end of the ethylene pipeline (40) is communicated with an ethylene ball tank input end.
5. The ethylene unloading system of claim 1, wherein: further comprising:
a vapor conditioning system (60), the vapor conditioning system (60) comprising a methanol pressure sensor, an ethylene temperature sensor, and a vapor conditioning valve;
the methanol pressure sensor and the ethylene temperature sensor are both fixedly installed in the shell (11), and the steam regulating valve is fixedly installed on the steam pipeline (51).
6. The ethylene unloading system of claim 1, wherein: further comprising:
an ethylene regulation system (70), the ethylene regulation system (70) comprising an ethylene pressure sensor and an ethylene regulation valve;
the ethylene pressure sensor is fixedly arranged on the shell (11), and the ethylene regulating valve is fixedly arranged on the low-temperature ethylene pipeline (80).
7. The ethylene unloading system of claim 1, wherein: further comprising:
a steam condensate line (90);
wherein, the input end of the steam condensation water pipeline (90) is communicated with the condensation water port (15).
8. The ethylene unloading system of claim 1, wherein: an exhaust port (18) is fixedly arranged at the top end of the shell (11), and a methanol filling port (17) is fixedly arranged at the bottom end of the shell (11).
9. Ethylene unloading process according to any of claims 1 to 8, comprising the steps of:
s1, dry replacement: before unloading, firstly, performing nitrogen replacement and drying on an unloading device and a pipeline, analyzing that the oxygen content is less than 0.1 percent, the dew point is lower than-70 ℃, and after the temperature is qualified, releasing the pressure to the micro positive pressure;
s2, nitrogen back replacement and precooling: when unloading for the first time, firstly connecting a tank car gas-phase pipe orifice flange with an unloading pipeline, carrying out reverse displacement and precooling on nitrogen of an unloading system by using tank car gas-phase ethylene, enabling ethylene to enter an ethylene spherical tank through the unloading system, then discharging the gas-phase ethylene into a torch through a discharge pipeline valve at the bottom of the ethylene spherical tank, synchronously carrying out reverse displacement on the nitrogen in the ethylene spherical tank, adopting a step pressure expansion displacement method, sampling and analyzing the nitrogen content to be less than or equal to 10mg/L, pressurizing to 2.0MPa, and ensuring that the reverse displacement nitrogen of an unloading device and an ethylene spherical tank group is qualified;
s3, pre-cooling of a spherical tank: after nitrogen is reversely replaced by the unloading device and the ethylene spherical tank group to be qualified, a liquid phase port of the ethylene tank car is connected with an unloading pipeline, liquid phase precooling is carried out on an unloading pump, a flare valve at an outlet of the pump is slightly opened in the liquid phase precooling process of the unloading pump, the liquid phase precooling and cooling speed is controlled to be about 5 ℃/h until the temperature of the unloading pump reaches about-90 ℃, when the temperature of the unloading pump is close to the temperature of liquid phase ethylene in the tank car, precooling of the unloading pump is finished, after the unloading pump is qualified, the pressure of methanol in an ethylene heater is set to be 70-100KPA according to the principle of firstly feeding steam and then feeding ethylene, automatic operation is carried out, low-temperature ethylene enters the heater through the ethylene unloading pump by means of the static pressure of the tank car, the flow of gas phase ethylene with the outlet valve of the heater being higher than-20 ℃ is regulated, the pressure of the spherical tank is boosted, when the pressure is increased to 1.6MPa (gauge pressure), an ethylene refrigerating unit is started to return the liquid phase ethylene condensed in the spherical tank from a feeding line at the bottom of the spherical tank, slowly pre-cooling the spherical tank until the temperature of the tank bottom reaches about-35 ℃ by adjusting the load of the refrigerator and controlling the liquid phase cooling speed to be about 5 ℃/h;
s4, unloading liquid-phase ethylene into a ball tank: under the liquid phase precooling working condition of the unloading system, confirming that the tank wagon is pressurized to 0.3MPa, opening a reverse circulation exhaust return pump inlet valve of an unloading pump, confirming that the unloading pump is precooled to about minus 90 ℃, starting an ethylene unloading pump, controlling the outlet pressure to be 2.2MPa through a pump outlet valve, controlling the pressure before a valve to be 1.7-1.6MPa by adjusting the opening of an outlet valve of an ethylene heater, controlling the temperature of the ethylene when the ethylene exits the heater to be minus 30-35 ℃ by adjusting the pressure of methanol of the heater to be 70-100KPa, keeping the outlet of the unloading ethylene heater smooth with a spherical tank liquid phase feeding pipe, and safely storing the liquid phase ethylene which reaches minus 35 ℃ and 1.6MPa in the spherical tank through the unloading system.
10. The ethylene unloading process of claim 9, wherein: the methanol temperature of the ethylene heater is controlled at 60-70 ℃, and the pressure is controlled at 70-100 KPa.
CN202210171007.4A 2022-02-23 2022-02-23 Ethylene unloading system and unloading method Active CN114508692B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115218122A (en) * 2022-07-19 2022-10-21 欧科能源技术(天津)有限公司 Ethylene and ethane gasification device and control method thereof
CN115507294A (en) * 2022-06-21 2022-12-23 浙江中控技术股份有限公司 LNG reserve station unloading method and system based on DCS

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07167396A (en) * 1993-12-14 1995-07-04 Ishikawajima Harima Heavy Ind Co Ltd Low temperature liquid receiving equipment
CN102705709A (en) * 2012-07-03 2012-10-03 宿州中粮生物化学有限公司 Unloading structure of low temperature ethylene tank vehicle
KR20150019961A (en) * 2013-08-16 2015-02-25 현대중공업 주식회사 A Treatment System of Liquefied Gas
CN104654318A (en) * 2015-03-10 2015-05-27 山东齐鲁石化工程有限公司 Low-temperature torch gas liquid separating, gasifying and heating system
CN205938520U (en) * 2016-07-26 2017-02-08 山东齐鲁石化工程有限公司 Low -temperature ethylene booster system of unloading
CN207112352U (en) * 2017-07-26 2018-03-16 辽宁同益石化有限公司 Ethene entrucking cryogenic system
CN109553058A (en) * 2019-01-08 2019-04-02 天津辰力工程设计有限公司 A kind of technique low temperature propane unloading and heated up
CN211574766U (en) * 2019-12-19 2020-09-25 南京扬子石油化工设计工程有限责任公司 Ethylene vaporization device
CN211875681U (en) * 2019-12-30 2020-11-06 欧科能源技术(天津)有限公司 Ethylene diffusion heating device
CN113266759A (en) * 2021-05-11 2021-08-17 中国空分工程有限公司 Ethylene combined storage system and method
CN114018068A (en) * 2021-12-07 2022-02-08 天津奥利达环保设备有限公司 Heater for low-temperature ethylene unloading and working method thereof

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07167396A (en) * 1993-12-14 1995-07-04 Ishikawajima Harima Heavy Ind Co Ltd Low temperature liquid receiving equipment
CN102705709A (en) * 2012-07-03 2012-10-03 宿州中粮生物化学有限公司 Unloading structure of low temperature ethylene tank vehicle
KR20150019961A (en) * 2013-08-16 2015-02-25 현대중공업 주식회사 A Treatment System of Liquefied Gas
CN104654318A (en) * 2015-03-10 2015-05-27 山东齐鲁石化工程有限公司 Low-temperature torch gas liquid separating, gasifying and heating system
CN205938520U (en) * 2016-07-26 2017-02-08 山东齐鲁石化工程有限公司 Low -temperature ethylene booster system of unloading
CN207112352U (en) * 2017-07-26 2018-03-16 辽宁同益石化有限公司 Ethene entrucking cryogenic system
CN109553058A (en) * 2019-01-08 2019-04-02 天津辰力工程设计有限公司 A kind of technique low temperature propane unloading and heated up
CN211574766U (en) * 2019-12-19 2020-09-25 南京扬子石油化工设计工程有限责任公司 Ethylene vaporization device
CN211875681U (en) * 2019-12-30 2020-11-06 欧科能源技术(天津)有限公司 Ethylene diffusion heating device
CN113266759A (en) * 2021-05-11 2021-08-17 中国空分工程有限公司 Ethylene combined storage system and method
CN114018068A (en) * 2021-12-07 2022-02-08 天津奥利达环保设备有限公司 Heater for low-temperature ethylene unloading and working method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115507294A (en) * 2022-06-21 2022-12-23 浙江中控技术股份有限公司 LNG reserve station unloading method and system based on DCS
CN115507294B (en) * 2022-06-21 2024-05-03 中控技术股份有限公司 LNG storage station unloading method and system based on DCS system
CN115218122A (en) * 2022-07-19 2022-10-21 欧科能源技术(天津)有限公司 Ethylene and ethane gasification device and control method thereof

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