CN110762387A - High-purity liquid chlorine tank truck unloading device and unloading method thereof - Google Patents

High-purity liquid chlorine tank truck unloading device and unloading method thereof Download PDF

Info

Publication number
CN110762387A
CN110762387A CN201910812078.6A CN201910812078A CN110762387A CN 110762387 A CN110762387 A CN 110762387A CN 201910812078 A CN201910812078 A CN 201910812078A CN 110762387 A CN110762387 A CN 110762387A
Authority
CN
China
Prior art keywords
liquid
liquid chlorine
switch valve
pneumatic switch
pipeline
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910812078.6A
Other languages
Chinese (zh)
Inventor
蔡永富
裘炎
王翰昳
黄建珍
张娟
王心慧
管钲兴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Titan Design & Engineering Co Ltd
Original Assignee
Zhejiang Titan Design & Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Titan Design & Engineering Co Ltd filed Critical Zhejiang Titan Design & Engineering Co Ltd
Priority to CN201910812078.6A priority Critical patent/CN110762387A/en
Publication of CN110762387A publication Critical patent/CN110762387A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • 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
    • F17C13/04—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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/123—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for gas bottles, cylinders or reservoirs for tank vehicles or for railway tank wagons
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/054—Size medium (>1 m3)
    • 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
    • F17C2205/0323—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
    • 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
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief 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
    • 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
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/036—Control means using alarms
    • 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
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/036—Avoiding leaks
    • 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
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion
    • 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
    • F17C2270/00—Applications
    • F17C2270/05—Applications for industrial use

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a high-purity liquid chlorine tank car unloading device and an unloading method thereof, wherein the device comprises a liquid chlorine tank car and at least two liquid chlorine storage tanks, a liquid phase port of the liquid chlorine tank car is communicated with one end of a liquid phase loading arm, the other end of the liquid phase loading arm is communicated with one end of a liquid chlorine unloading pipeline, and the other end of the liquid phase unloading pipeline is respectively communicated with inlets of a first liquid chlorine storage tank and a second liquid chlorine storage tank; the gas phase port of the liquid chlorine tank wagon is communicated with one end of a gas phase filling riser, and the other end of the gas phase filling riser is communicated with one end of a chlorine gas pressurizing pipeline and is communicated with the outlet of the liquid chlorine gasifier through the other end of the chlorine gas pressurizing pipeline; the inlet of the liquid chlorine gasifier is communicated with one end of the discharge pipe of the liquid chlorine storage tank, the other end of the discharge pipe of the liquid chlorine storage tank is respectively communicated with the outlets of the first liquid chlorine storage tank and the second liquid chlorine storage tank through a liquid chlorine metering pump, and the liquid chlorine gasifier has the beneficial effects that: the unloading process and the unloading equipment of the high-purity liquid chlorine effectively improve the unloading safety and avoid the pollution of liquid nitrogen.

Description

High-purity liquid chlorine tank truck unloading device and unloading method thereof
Technical Field
The invention relates to the technical field of unloading of highly toxic chemicals, in particular to an unloading device and an unloading method for a high-purity liquid chlorine tank truck.
Background
High purity chlorine is an important electronic gas, mainly used in the semiconductor industry. The liquid chlorine is a liquefied state of chlorine gas, is a highly toxic chemical, has high harm degree, and is listed as a dangerous chemical which is first subjected to key supervision by the national safety supervision department. Once the liquid chlorine is leaked, the harm to the human health and the environment is great, and the unloading process is a link in which the liquid chlorine is easily leaked and polluted.
At present, the domestic liquid chlorine tank car unloading process mainly comprises the following three processes: 1) the air-compression chlorine-discharging process is simple and safe, but the chlorine is easy to generate hypochlorous acid and hydrochloric acid with water in the air in the unloading process, the corrosion to equipment, pipelines and the like is extremely high, the water content of compressed air needs to be controlled, the air continuously enters a tank car and a storage tank, the purity of liquid chlorine is influenced, high-purity liquid chlorine is polluted, and a large amount of chlorine-containing waste gas is generated; 2) a potential difference chlorine pumping and discharging process is characterized in that a liquid chlorine ground tank is added, liquid chlorine is introduced into the ground tank through the pressure of a tank car, and then the liquid chlorine is pumped into a storage tank by a pump. 3) The gasification chlorine discharging process is characterized in that liquid chlorine in a gasifier is gasified and then pressurized, and the liquid chlorine is pressed into a storage tank from a tank car.
At present, the liquid chlorine unloading also commonly adopts a common liquid chlorine filling riser to unload, the common filling riser has no anti-leakage measures and devices, the unloading process is easy to cause untight connection between the filling riser and a tank car, and the filling riser adapter is not sealed tightly, so that leakage occurs. In addition, after unloading is finished, the unloading crane pipe is separated from the liquid chlorine tank wagon, and after the crane pipe valve and the tank wagon valve are closed, residual liquid chlorine between the two valves can leak, so that the human health and the environment are harmed, and the liquid chlorine is wasted.
Therefore, the leakage of the high-purity liquid chlorine in the unloading process and the pollution of the high-purity liquid chlorine are the biggest problems in the unloading process of the liquid chlorine.
Disclosure of Invention
The invention provides an unloading device and an unloading method of a high-purity liquid chlorine tank car, aiming at solving the problems of leakage and pollution in the unloading process of high-purity liquid chlorine.
The technical scheme of the invention is as follows:
the unloading device of the high-purity liquid chlorine tank car is characterized by comprising a liquid chlorine tank car and at least two liquid chlorine storage tanks, wherein the liquid chlorine storage tanks comprise a first liquid chlorine storage tank and a second liquid chlorine storage tank, the top of the liquid chlorine tank car is provided with a liquid phase port and a gas phase port, the liquid phase port of the liquid chlorine tank car is communicated with one end of a liquid phase filling riser, the other end of the liquid phase filling riser is communicated with one end of a liquid chlorine unloading pipeline, the other end of the liquid phase filling riser is respectively communicated with inlets of the first liquid chlorine storage tank and the second liquid chlorine storage tank through the other end of the liquid phase unloading pipeline, and inlets of the first liquid chlorine storage tank and the second liquid chlorine storage tank are respectively provided with a thirteenth pneumatic switch valve and a fourteenth pneumatic switch; the gas phase port of the liquid chlorine tank wagon is communicated with one end of a gas phase filling riser, and the other end of the gas phase filling riser is communicated with one end of a chlorine gas pressurizing pipeline and is communicated with the outlet of the liquid chlorine gasifier through the other end of the chlorine gas pressurizing pipeline; the inlet of the liquid chlorine gasifier is communicated with one end of a liquid chlorine storage tank discharge pipe, the other end of the liquid chlorine storage tank discharge pipe is respectively communicated with the outlets of the first liquid chlorine storage tank and the second liquid chlorine storage tank through a liquid chlorine metering pump, and the outlets of the first liquid chlorine storage tank and the second liquid chlorine storage tank are respectively provided with a ninth pneumatic switch valve and a tenth pneumatic switch valve.
The high-purity liquid chlorine tank car device of unloading, its characterized in that: the gas-phase crane pipe and the liquid-phase crane pipe are connected through a crane pipe communicating pipe, and an eleventh pneumatic switch valve and a twelfth pneumatic switch valve are respectively arranged on the gas-phase crane pipe and the liquid-phase crane pipe at the rear of the pipeline connection; a seventh pneumatic switch valve is arranged on the crane pipe communicating pipe; a pipeline between the liquid-phase crane pipe and the seventh pneumatic switch valve on the crane pipe communicating pipe is connected with a chlorine pressurization pipeline through a crane pipe liquid return pipeline, is connected with a chlorine analysis system through a liquid-phase analysis pipeline, is connected with a tail gas system through a liquid-phase crane pipe emptying pipeline, and is provided with a sixteenth pneumatic switch valve on the crane pipe recycling pipeline; the liquid phase analysis pipeline is provided with an eighth pneumatic switch valve; the liquid phase crane pipe emptying pipeline is provided with a safety valve; and a second pressure gauge is arranged on a crane pipe communicating pipe connected between the liquid phase crane pipe and the seventh pneumatic switch valve, and the second pressure gauge has an alarm function.
The high-purity liquid chlorine tank car device of unloading, its characterized in that: a vacuum system is connected to a pipeline between the gas-phase crane pipe and the seventh pneumatic switch valve on the crane pipe communicating pipe through a vacuum tail gas inlet pipeline, the pipeline is connected to a chlorine recovery system through a pressure relief pipeline, the pipeline is connected to a chlorine analysis system through a gas-phase analysis pipeline, the pipeline is connected to a tail gas system through a gas-phase crane pipe emptying pipeline, the pipeline is connected to a high-purity nitrogen system through a nitrogen pipeline, and the fifth pneumatic switch valve is arranged on the vacuum tail gas inlet pipeline; a fifteenth pneumatic switch valve is arranged on the pressure relief pipeline; the gas phase analysis pipeline is provided with a sixth pneumatic switch valve; the liquid phase crane pipe emptying pipeline is provided with a safety valve; a third pneumatic switch valve is arranged on the nitrogen pipeline; and a first pressure gauge is arranged on a crane pipe communicating pipe connected between the gas-phase crane pipe and the seventh pneumatic switch valve, and the first pressure gauge has a remote transmission alarm function.
The high-purity liquid chlorine tank car device of unloading, its characterized in that: the vacuum system adopts a Venturi vacuum pump with a nitrogen power source, a nitrogen inlet of the Venturi vacuum pump is connected to a nitrogen pipeline, and the nitrogen inlet is provided with a fourth pneumatic switch valve; the outlet of the venturi vacuum pump is connected to a tail gas treatment system through a vacuum emptying pipeline; and the tail gas inlet of the venturi vacuum pump is connected with a vacuum tail gas inlet pipeline.
The high-purity liquid chlorine tank car device of unloading, its characterized in that: the liquid chlorine gasifier is a closed jacket water bath type gasifier, an inner cavity of the gasifier is provided with a liquid level meter port, a liquid chlorine inlet and a chlorine gas outlet, the liquid level meter port is provided with a liquid level meter, the liquid level meter and a liquid chlorine metering pump are controlled in a linkage mode, the liquid chlorine inlet is inserted into the bottom of the inner cavity of the gasifier, the liquid chlorine inlet is connected with a discharge pipe of a liquid chlorine storage tank, the chlorine gas outlet is connected with a chlorine gas pressurization pipeline, the chlorine gas pressurization pipeline is provided with a second thermometer and a third pressure gauge, the second thermometer and the third pressure gauge are provided with a remote alarm function, the chlorine gas pressurization pipeline is connected into a tail gas treatment system through a liquid chlorine gasifier emptying pipeline, and a safety valve is arranged on the liquid chlorine gasifier emptying pipeline; the gasifier jacket is provided with a PH meter which has a remote alarm function; the gasifier jacket is provided with a thermometer and electric heating, and the first thermometer and the electric heating are controlled in a linkage mode.
The high-purity liquid chlorine tank car device of unloading, its characterized in that: the one end that liquid phase oil filling riser and liquid chlorine tank wagon liquid phase mouth link to each other sets up the second pneumatic switch valve, the one end that gaseous phase oil filling riser and liquid chlorine tank wagon gas phase mouth link to each other sets up first pneumatic switch valve.
The unloading method of the high-purity liquid chlorine tank truck unloading device is characterized in that: the method comprises the following steps:
1) the crane tube is connected: the gas phase filling riser and the liquid phase filling riser of the liquid chlorine filling riser are respectively connected with a gas phase port and a liquid phase port of the liquid chlorine tank truck; and opening a second pneumatic switch valve of the liquid-phase oil filling riser and a first pneumatic switch valve of the gas-phase oil filling riser, wherein the first valve and the second valve of the gas-phase port and the liquid-phase port of the tank car are in a closed state, a seventh pneumatic switch valve of the oil filling riser communicating pipe is in an open state, and other pneumatic switch valves are in a closed state.
2) Pressure maintaining and leakage testing: opening a third pneumatic switch valve on a nitrogen pipeline, closing the third pneumatic switch valve when the pressure of the crane pipe communicating pipe reaches a set value, and keeping the set pressure for a set time; if the pressure is not changed, the liquid chlorine filling riser is well connected with the liquid chlorine tank wagon;
3) vacuumizing and purging: opening a fourth pneumatic switch valve and a fifth pneumatic switch valve of the Venturi vacuum pump, vacuumizing and purging the crane pipe communicating pipe and the crane pipe for a set duration, and closing the fourth pneumatic switch valve and the fifth pneumatic switch valve after purging is finished;
4) secondary pressure maintaining and leakage testing: opening a third pneumatic switch valve, and closing the third pneumatic switch valve when the pressure of the loading arm connecting pipe reaches a set value, and keeping the set pressure for a set time; if the pressure is not changed, the liquid chlorine filling riser is connected with the liquid chlorine tank wagon completely;
5) secondary vacuumizing and purging: opening a fourth pneumatic switch valve and a fifth pneumatic switch valve of the Venturi vacuum pump, vacuumizing and purging the crane pipe communicating pipe and the crane pipe for a set duration, and closing the fourth pneumatic switch valve and the fifth pneumatic switch valve after purging is finished;
6) sampling and analyzing: closing a seventh pneumatic switch valve of the loading arm communicating pipe, opening a first valve and a second valve of the liquid chlorine tank car, then sequentially opening a sixth pneumatic switch valve of the gas phase analysis pipeline and an eighth pneumatic switch valve of the liquid phase analysis pipeline for sampling analysis, and closing the sixth pneumatic switch valve and the eighth pneumatic switch valve after sampling;
7) gasification, pressurization and discharge: after sampling and analyzing are qualified, opening a tenth pneumatic switch valve at the outlet of the bottom of the second liquid chlorine storage tank, a liquid chlorine metering pump, an eleventh pneumatic switch valve of a chlorine pressurization pipeline, a twelfth pneumatic switch valve of a liquid chlorine discharge pipeline and a thirteenth pneumatic switch valve at the inlet of the first liquid chlorine storage tank, simultaneously heating the liquid chlorine gasifier, and closing the valves after unloading is finished;
8) pressure relief and backflow: opening a fifteenth pneumatic switch valve of the pressure relief pipeline, relieving pressure of the liquid chlorine tank car and the oil filling riser, closing the fifteenth pneumatic switch valve of the pressure relief pipeline when the pressure of the oil filling riser communicating pipe is reduced to a set value, opening a sixteenth pneumatic switch valve of the oil filling riser liquid return pipeline, pressing residual liquid chlorine of the oil filling riser into the liquid chlorine tank car, and closing the sixteenth pneumatic switch valve of the oil filling riser liquid return pipeline, a first valve and a second valve of the liquid chlorine tank car;
9) vacuumizing and blowing and maintaining the pressure at negative pressure: and opening a fourth pneumatic switch valve and a fifth pneumatic switch valve of the Venturi vacuum pump, vacuumizing and purging the filling pipe communicating pipe and the filling pipe, purging for a set duration, closing the fourth pneumatic switch valve and the fifth pneumatic switch valve, maintaining the pressure at a negative pressure for the set duration, and if the pressure is not changed, determining that the first valve and the second valve of the liquid chlorine tank car are well closed.
The unloading method of the high-purity liquid chlorine tank truck unloading device is characterized in that: the liquid chlorine gasifier is heated by adopting water bath, and the temperature is controlled at 30 ℃.
The invention has the beneficial effects that:
1) according to the high-purity liquid chlorine unloading device, the safety valve is arranged on the crane pipe communicating pipe, so that overpressure can be prevented in the unloading process, and the operation safety of a system is ensured.
2) The nitrogen gas is creatively adopted to perform pressure maintaining and leakage testing twice on the unloading pipeline, so that the reliability of the connection between the crane pipe and the tank car can be ensured, and the liquid chlorine leakage accident caused by the poor connection of the crane pipe is avoided. And meanwhile, venturi purging is carried out twice, so that nitrogen impurities are prevented from being introduced after pressure testing.
3) The invention creatively adds a sampling analysis program, and avoids potential safety hazard caused by disqualified liquid chlorine in the tank car; the negative pressure maintaining after unloading and purging is increased, and the hidden leakage danger is avoided by confirming that the tank car pipe opening valve is closed.
4) The invention creatively adopts pressure relief backflow, on one hand, the emission of pipeline purging chlorine waste gas can be reduced, the leakage of residual liquid chlorine can be avoided, and the environment is protected; on the other hand, liquid chlorine flows back to the tank wagon, thereby reducing the waste of raw materials.
5) The liquid chlorine gasifier adopted by the invention can effectively avoid nitrogen trichloride accumulation, prevent explosion and simultaneously prevent liquid chlorine leakage.
6) The method is adopted to unload 25t of liquid chlorine tank cars for about 600 times in total, no liquid chlorine leakage event occurs, the purity of the electronic grade liquid chlorine in the tank cars is 99.999 percent, the purity of the liquid chlorine unloaded to the liquid chlorine storage tank is 99.999 percent, the pressure is released and the liquid chlorine reflows to the tank cars for about 25kg when the liquid chlorine is unloaded each time, about 15000kg of the electronic grade liquid chlorine is totally recovered, on one hand, the tail gas emission is reduced, and on the other hand, the raw material waste is reduced.
7) The unloading process and the unloading equipment of the high-purity liquid chlorine effectively improve the unloading safety and avoid the pollution of liquid nitrogen.
Drawings
FIG. 1 is a schematic view of the overall connection structure of the present invention;
FIG. 2 is an enlarged view of part A of the present invention;
FIG. 3 is an enlarged view of the structure of part B of the present invention;
FIG. 4 is an enlarged view of the structure of part C of the present invention;
in the figure: v01-liquid chlorine tanker, V02-first liquid chlorine storage tank, V03-second liquid chlorine storage tank, V04-liquid chlorine emergency relatch, L01-liquid chlorine filling pipe, L01A gaseous phase filling pipe, L01B liquid phase filling pipe, P01-liquid chlorine metering pump, E01-liquid chlorine vaporizer, VG 01-Venturi, AV 01-first pneumatic switch valve, AV 02-second pneumatic switch valve, AV 03-third pneumatic switch valve, AV 04-fourth pneumatic switch valve, AV 05-fifth pneumatic switch valve, AV 06-sixth pneumatic switch valve, AV 07-seventh pneumatic switch valve, AV 08-eighth pneumatic switch valve, AV 09-ninth pneumatic switch valve, AV 10-tenth pneumatic switch valve, AV 2-eleventh pneumatic switch valve, AV 56-twelfth pneumatic switch valve, AV 86 13-fourteenth pneumatic switch valve, AV 8269553, AV 15-a fifteenth pneumatic switch valve, AV 16-a sixteenth pneumatic switch valve, L02-a crane connecting pipe, L03-a chlorine gas pressurizing pipeline, L04-a liquid chlorine discharging pipeline, L05-a vacuum tail gas inlet pipeline, L06-a vacuum emptying pipeline, L07-a nitrogen pipeline, L08-a nitrogen pipeline, L09-a pressure relief pipeline, L10-a crane liquid return pipeline, L11-a gas phase analysis pipeline, L12-a liquid phase analysis pipeline, L13-a gas phase crane emptying pipeline, L14-a liquid phase crane emptying pipeline, L15-a liquid chlorine storage tank discharging pipe, L16-a liquid chlorine vaporizer emptying pipeline, LICA 01-a liquid level meter, 01-a first thermometer, TIA 02-a second thermometer, PIA 01-a first pressure gauge, PIA 02-a second pressure gauge, PIA 03-a third pressure gauge, PHIA-a PH 01-a PH gauge, SV 01-first relief valve, SV 02-second relief valve, SV 03-third relief valve, MV 01-first valve, MV 02-second valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1-4, a high-purity liquid chlorine tank car unloading device comprises a liquid chlorine tank car V01 and at least two liquid chlorine storage tanks, two of which are provided in this embodiment, including a first liquid chlorine storage tank V02 and a second liquid chlorine storage tank V03, a liquid phase port and a gas phase port are provided at the top of the liquid chlorine tank car V01, the liquid phase port of the liquid chlorine tank car V01 is communicated with one end of a liquid phase crane pipe L01B, the other end of the liquid phase loading arm L01B is communicated with one end of a liquid chlorine discharging pipeline L04, the other end of the liquid phase discharging pipeline L04 is communicated with inlets of a first liquid chlorine storage tank V02 and a second liquid chlorine storage tank V03, a twelfth pneumatic switch valve AV12, a thirteenth pneumatic switch valve AV13 and a fourteenth pneumatic switch valve V14 are sequentially arranged on the liquid chlorine discharging pipeline L04 along the liquid chlorine discharging direction, wherein a thirteenth pneumatic switching valve AV13 and a fourteenth pneumatic switching valve V14 are located at the inlets of the first liquid chlorine storage tank V02 and the second liquid chlorine storage tank V03, respectively; a gas phase port of the liquid chlorine tanker V01 is communicated with one end of a gas phase crane L01A, the other end of the gas phase crane L01A is communicated with one end of a chlorine gas pressurizing pipeline L03, the other end of the chlorine gas pressurizing pipeline L03 is communicated with an outlet of a liquid chlorine gasifier E01, and an eleventh pneumatic switch valve AV11 is arranged on a chlorine gas pressurizing pipeline L03; the inlet of the liquid chlorine gasifier E01 is communicated with one end of a liquid chlorine storage tank discharge pipe L15, the other end of the liquid chlorine storage tank discharge pipe L15 is respectively communicated with the outlets of a first liquid chlorine storage tank V02 and a second liquid chlorine storage tank V03 through a liquid chlorine metering pump P01, and a ninth pneumatic switch valve AV09 and a tenth pneumatic switch valve AV10 are respectively arranged at the outlets of the first liquid chlorine storage tank V02 and the second liquid chlorine storage tank V03 on the liquid chlorine storage tank discharge pipe L15.
Wherein, the pipeline that the gas-phase oil filling riser L01A and eleventh pneumatic ooff valve AV11 correspond to and connect, its the pipeline that the liquid-phase oil filling riser L01B and twelfth pneumatic ooff valve AV12 correspond to and connect, the above-mentioned two pipelines are connected through oil filling riser communicating tube L02 (namely the liquid-phase oil filling riser L01B and the gas-phase oil filling riser L01A are connected through oil filling riser communicating tube L02), set up the seventh pneumatic ooff valve AV07 on the said oil filling riser communicating tube L02; a crane connecting pipe L02 connected between the liquid phase crane L01B and the seventh pneumatic switch valve AV07 is connected to a chlorine gas pressurizing pipeline L03 through a crane liquid return pipeline L10, and a sixteenth pneumatic switch valve AV16 is arranged on the crane recovery pipeline L10; a filling pipe communicating pipe L02 connected between the liquid phase filling pipe L01B and the seventh pneumatic switch valve AV07 is connected to a chlorine gas analysis system through a liquid phase analysis pipeline L12, and an eighth pneumatic switch valve AV08 is arranged on the liquid phase analysis pipeline L12; a crane connecting pipe L02 connected between the liquid phase crane L01B and a seventh pneumatic switch valve AV07 is connected to a tail gas system through a liquid phase crane emptying pipeline L14, and the liquid phase crane emptying pipeline L14 is provided with a safety valve SV 02; and a second pressure gauge PIA02 is arranged on a crane pipe communicating pipe L02 connected between the liquid phase crane pipe L01B and the seventh pneumatic switch valve AV07, and the second pressure gauge PIA02 has an alarm function.
A crane connecting pipe L02 connected between the gas phase crane L01A and the seventh pneumatic switch valve AV07 is connected to a vacuum system through a vacuum tail gas inlet pipeline L05, and a fifth pneumatic switch valve AV05 is arranged on the vacuum tail gas inlet pipeline L05; a filling pipe communicating pipe connected between the gas phase filling pipe L01A and the seventh pneumatic switch valve AV07 is connected to a chlorine recovery system through a pressure relief pipeline L09, and a fifteenth pneumatic switch valve AV15 is arranged on the pressure relief pipeline L09; a filling pipe communicating pipe L02 connected between the gas phase filling pipe L01A and the seventh pneumatic switch valve AV07 is connected to a chlorine gas analysis system through a gas phase analysis pipeline L11, and a sixth pneumatic switch valve AV06 is arranged on the gas phase analysis pipeline L11; a crane connecting pipe connected between the gas phase crane L01A and the seventh pneumatic switch valve AV07 is connected to a tail gas system through a gas phase crane emptying pipeline L13, and the liquid phase crane emptying pipeline L13 is provided with a safety valve SV 01; a crane connecting pipe L02 connected between the gas phase crane L01A and the seventh pneumatic switch valve AV07 is connected to a high purity nitrogen system through a nitrogen pipeline L07, and a third pneumatic switch valve AV03 is arranged on the nitrogen pipeline L07; a first pressure gauge PIA01 is arranged on a crane pipe communicating pipe L02 connected between the gas phase crane pipe L01A and the seventh pneumatic switch valve AV07, and the first pressure gauge PIA01 has a remote transmission alarm function.
The vacuum system adopts a Venturi vacuum pump VG01 with a nitrogen power source, a nitrogen inlet of the Venturi vacuum pump is connected to a nitrogen pipeline L07, and a fourth pneumatic switch valve AV04 is arranged at the nitrogen inlet; an outlet of the venturi vacuum pump VG01 is connected to a tail gas emptying system; and a tail gas inlet of the Venturi vacuum pump VG01 is connected with a vacuum tail gas inlet pipeline L05.
The liquid chlorine gasifier E01 is a closed jacket water bath gasifier, a liquid level meter port, a liquid chlorine inlet and a chlorine gas outlet are arranged in an inner cavity of the gasifier, the liquid level meter port is provided with a liquid level meter LICA01, the liquid level meter LICA01 is controlled by a liquid chlorine metering pump P01 in a linkage mode, the liquid chlorine inlet is inserted into the bottom of the inner cavity of the gasifier, the liquid chlorine inlet is connected with a liquid chlorine storage tank discharge pipe L15, the chlorine gas outlet is connected with a chlorine gas pressurization pipeline L03, the chlorine gas pressurization pipeline L03 is provided with a second thermometer TIA02 and a third pressure gauge PIA03, the second thermometer TIA02 and the third pressure gauge PIA03 are provided with a remote transmission alarm function, the chlorine gas pressurization pipeline L03 is connected to a tail gas treatment system through a liquid chlorine gasifier vent pipeline L16, and a safety valve SV03 is arranged on a liquid chlorine gasifier vent pipeline L16; the gasifier jacket is provided with a PH meter PHIA01 which has a remote transmission alarm function; the gasifier jacket is provided with a first thermometer TIA01 and electric heating, and the first thermometer TIA01 is controlled in linkage with the electric heating.
And a second pneumatic switch valve AV02 is arranged at one end of the liquid phase crane pipe L01B connected with the liquid phase port of the liquid chlorine tanker V01, and a first pneumatic switch valve AV01 is arranged at one end of the gas phase crane pipe L01A connected with the gas phase port of the liquid chlorine tanker V01.
The unloading method of the high-purity liquid chlorine unloading device comprises the following steps:
1) the crane tube is connected: the gas phase filling riser and the liquid phase filling riser of the liquid chlorine filling riser are respectively connected with a gas phase port and a liquid phase port of the liquid chlorine tank truck; and (3) opening the second pneumatic switch valve AV02 of the liquid-phase crane pipe and the first pneumatic switch valve AV01 of the gas-phase crane pipe, wherein the first valve MV01 and the second valve MV02 are in a closed state, the seventh pneumatic switch valve AV07 of the crane pipe communicating pipe is in an open state, and other pneumatic switch valves are in a closed state.
2) Pressure maintaining and leakage testing: opening a third pneumatic switch valve AV03 of the nitrogen pipeline, closing the third pneumatic switch valve AV03 when the pressure (PIA 01/02) of the crane pipe communicating pipe L02 is increased to 0.6MPa, and maintaining the pressure for 5 min; if the pressure is not changed, the crane pipe is well connected with the tank wagon preliminarily;
3) vacuumizing and purging: opening a fourth pneumatic switch valve AV04 and a fifth pneumatic switch valve AV05 of the Venturi vacuum pump, vacuumizing and purging the crane pipe connecting pipe L02 and the crane pipe L01 for 10min, and closing the fourth pneumatic switch valve AV04 and the fifth pneumatic switch valve AV05 after the purging is finished;
4) secondary pressure maintaining and leakage testing: opening a third pneumatic switch valve AV03, closing the third pneumatic switch valve AV03 when the pressure of the loading arm connecting pipe (PIA 01/02) is increased to 0.8MPa, and maintaining the pressure for 30 min; if the pressure is not changed, the crane pipe is ensured to be connected with the tank wagon completely;
5) secondary vacuumizing and purging: opening a fourth pneumatic switch valve AV04 and a fifth pneumatic switch valve AV05 of the Venturi vacuum pump, vacuumizing and purging the crane pipe connecting pipe L02 and the crane pipe L01 for 30min, and closing the fourth pneumatic switch valve AV04 and the fifth pneumatic switch valve AV05 after the purging is finished;
(6) sampling and analyzing: closing a seventh pneumatic switch valve AV07 of the loading arm communicating pipe, opening a first valve MV01 and a second valve MV02, then opening a sixth pneumatic switch valve AV06 of the gas phase analysis pipeline and an eighth pneumatic switch valve AV08 of the liquid phase analysis pipeline in sequence for sampling analysis, and closing a sixth pneumatic switch valve AV06 and an eighth pneumatic switch valve AV08 after sampling;
(7) gasification, pressurization and discharge: after sampling and analysis are qualified, opening a tenth pneumatic switch valve AV10 at the bottom outlet of a second liquid chlorine storage tank V03, a liquid chlorine metering pump P01, a liquid chlorine gasifier E01 for heating, an eleventh pneumatic switch valve AV11 of a chlorine pressurization pipeline, a twelfth pneumatic switch valve AV12 of a liquid chlorine discharge pipeline and a thirteenth pneumatic switch valve AV13 at the inlet of the first liquid chlorine storage tank, and closing the valves after unloading;
8) pressure relief and backflow: opening a fifteenth pneumatic switch valve AV15 of the pressure relief pipeline, relieving pressure of the tank car and the loading arm, reducing the pressure of a loading arm communicating pipe to 0.1MPa, closing a fifteenth pneumatic switch valve AV15 of the pressure relief pipeline, opening a sixteenth pneumatic switch valve AV16 of the loading arm liquid return pipeline, pressing residual liquid chlorine of the loading arm into the tank car, and closing a sixteenth pneumatic switch valve AV16, a first valve MV01 and a second valve MV02 of the loading arm liquid return pipeline;
9) vacuumizing and blowing and maintaining the pressure at negative pressure: and opening a fourth pneumatic switch valve AV04 and a fifth pneumatic switch valve AV05 of the Venturi vacuum pump, vacuumizing and purging the crane pipe connecting pipe L02 and the crane pipe L01 for 20min, closing the fourth pneumatic switch valve AV04 and the fifth pneumatic switch valve AV05, maintaining the negative pressure of-0.1 MPa for about 20min, and confirming that the first valve MV01 and the second valve MV02 are closed well if the pressure is unchanged.
In order to avoid accumulation of nitrogen trichloride and leakage of a gasifier, a high-purity liquid chlorine unloading device adopts the following control mode for a liquid chlorine gasifier (E01):
a. the liquid level meter LICA01 of the liquid chlorine gasifier controls the liquid level height by interlocking with the liquid chlorine metering pump P01, so that the phenomenon that the gasifier is unstable due to too much liquid chlorine is prevented;
b. the liquid chlorine gasifier E01 adopts a feed inlet to insert the bottom feed downwards, so that the bottom feed can prevent the accumulation of nitrogen trichloride;
c. heating the gasifier by adopting water bath, and controlling the temperature at 30 ℃;
d. a PH meter PHIA01 is arranged in the water bath for detection and alarm, the gasifier jacket is closed, and the corrosion and leakage of the gasifier inner cavity and the overflow of liquid chlorine are prevented;
e. the chlorine pressurization pipeline of the gasifier is provided with a second thermometer TIA02, a third pressure gauge PIA03 alarm and a safety valve SV03, so as to prevent the overpressure of the liquid chlorine unloading device.
The high-purity liquid chlorine unloading device is characterized in that a first safety valve SV01 and a second safety valve SV02 are arranged on a crane pipe communicating pipe L02, so that overpressure can be prevented in the unloading process, and the operation safety of a system is ensured.

Claims (8)

1. The unloading device is characterized by comprising a liquid chlorine tank wagon (V01), a loading arm (L01) and at least two liquid chlorine storage tanks, wherein the liquid chlorine storage tanks comprise a first liquid chlorine storage tank (V02) and a second liquid chlorine storage tank (V03), the top of the liquid chlorine tank wagon (V01) is provided with a liquid phase port and a gas phase port, the liquid phase port of the liquid chlorine tank wagon (V01) is communicated with one end of the liquid phase loading arm (L01B), the other end of the liquid phase loading arm (L01B) is communicated with one end of a liquid chlorine unloading pipeline (L04), the other end of the liquid phase unloading pipeline (L04) is communicated with inlets of the first liquid chlorine storage tank (V02) and the second liquid chlorine storage tank (V03), and inlet ports of the first liquid chlorine storage tank (V02) and the second liquid chlorine storage tank (V03) are respectively provided with a thirteenth pneumatic switch valve (AV 13) and a fourteenth pneumatic switch valve (AV 14); the gas phase port of the liquid chlorine tanker (V01) is communicated with one end of a gas phase crane pipe (L01A), the other end of the gas phase crane pipe (L01A) is communicated with one end of a chlorine gas pressurizing pipeline (L03), and is communicated with the outlet of a liquid chlorine gasifier (E01) through the other end of the chlorine gas pressurizing pipeline (L03); the inlet of the liquid chlorine gasifier (E01) is communicated with one end of a liquid chlorine storage tank discharging pipe (L15), the other end of the liquid chlorine storage tank discharging pipe (L15) is respectively communicated with the outlets of a first liquid chlorine storage tank (V02) and a second liquid chlorine storage tank (V03) through a liquid chlorine metering pump (P01), and the outlets of the first liquid chlorine storage tank (V02) and the second liquid chlorine storage tank (V03) are respectively provided with a ninth pneumatic switch valve (AV 09) and a tenth pneumatic switch valve (AV 10).
2. The high-purity liquid chlorine tank truck unloading device according to claim 1, characterized in that: the gas-phase crane pipe (L01A) and the liquid-phase crane pipe (L01B) are connected through a crane pipe communicating pipe (L02), and an eleventh pneumatic switch valve (AV 11) and a twelfth pneumatic switch valve (AV 12) are respectively arranged on the gas-phase crane pipe (L01A) and the liquid-phase crane pipe (L01B) at the rear of the pipeline connection; a seventh pneumatic switch valve (AV 07) is arranged on the crane pipe communicating pipe (L02); a pipeline between a liquid phase crane pipe (L01B) and a seventh pneumatic switch valve (AV 07) on the crane pipe communicating pipe (L02) is connected with a chlorine pressurization pipeline (L03) through a crane pipe liquid return pipeline (L10), is connected with a chlorine analysis system through a liquid phase analysis pipeline (L12), is connected with a tail gas system through a liquid phase crane pipe emptying pipeline (L14), and a sixteenth pneumatic switch valve (AV 16) is arranged on the crane pipe recovery pipeline (L10); the liquid phase analysis line (L12) is provided with an eighth pneumatic on-off valve (AV 08); the liquid phase crane pipe emptying pipeline (L14) is provided with a safety valve (SV 02); and a second pressure gauge (PIA 02) is arranged on a crane pipe communicating pipe (L02) connected between the liquid phase crane pipe (L01B) and the seventh pneumatic switch valve (AV 07), and the second pressure gauge (PIA 02) has an alarm function.
3. The high-purity liquid chlorine tank truck unloading device according to claim 1, characterized in that: a vacuum system is connected to a pipeline between a gas-phase crane pipe (L01A) and a seventh pneumatic switch valve (AV 07) on the crane pipe communicating pipe (L02) through a vacuum tail gas inlet pipeline (L05), a chlorine recovery system is connected to the pipeline through a pressure relief pipeline (L09), a chlorine analysis system is connected to the pipeline through a gas-phase analysis pipeline (L11), a tail gas system is connected to the pipeline through a gas-phase crane pipe emptying pipeline (L13), a high-purity nitrogen system is connected to the pipeline through a nitrogen pipeline (L07), and a fifth pneumatic switch valve (AV 05) is arranged on the vacuum tail gas inlet pipeline (L05); a fifteenth pneumatic switching valve (AV 15) is arranged on the pressure relief pipeline (L09); the gas phase analysis line (L11) is provided with a sixth pneumatic on-off valve (AV 06); the liquid phase crane pipe emptying pipeline (L13) is provided with a safety valve (SV 01); a third pneumatic switch valve (AV 03) is arranged on the nitrogen pipeline (L07); a first pressure gauge (PIA 01) is arranged on a crane pipe communicating pipe (L02) connected between the gas-phase crane pipe (L01A) and the seventh pneumatic switch valve (AV 07), and the first pressure gauge (PIA 01) has a remote transmission alarm function.
4. The high-purity liquid chlorine tank truck unloading device according to claim 3, characterized in that: the vacuum system adopts a Venturi vacuum pump (VG 01) with a nitrogen power source, a nitrogen inlet of the Venturi vacuum pump is connected to a nitrogen pipeline (L07), and the nitrogen inlet is provided with a fourth pneumatic switch valve (AV 04); the outlet of the Venturi vacuum pump (VG 01) is connected to the tail gas treatment system through a vacuum emptying pipeline (L06); and a tail gas inlet of the Venturi vacuum pump (VG 01) is connected with a vacuum tail gas inlet pipeline (L05).
5. The high-purity liquid chlorine tank truck unloading device according to claim 1, characterized in that: the liquid chlorine gasifier (E01) is a closed jacket water bath type gasifier, an inner cavity of the closed jacket water bath type gasifier is provided with a liquid level meter port, a liquid chlorine inlet and a chlorine outlet, the liquid level meter port is provided with a liquid level meter (LICA 01), the liquid level meter (LICA 01) is in linkage control with a liquid chlorine metering pump (P01), the liquid chlorine inlet is inserted into the bottom of the inner cavity of the gasifier, the liquid chlorine inlet is connected with a liquid chlorine storage tank discharge pipe (L15), the chlorine outlet is connected with a chlorine pressurization pipeline (L03), the chlorine pressurization pipeline (L03) is provided with a second thermometer (TIA 02) and a third pressure gauge (PIA 03), the second thermometer (TIA 02) and the third pressure gauge (PIA 03) are provided with a remote transmission alarm function, the chlorine pressurization pipeline (L03) is connected to a tail gas treatment system through a liquid chlorine gasifier emptying pipeline (L16), and the liquid chlorine gasifier emptying pipeline (L16) is provided with a safety valve (SV 03); the gasifier jacket is provided with a PH meter (PHIA 01), and the PH meter (PHIA 01) is provided with a remote alarm function; the gasifier jacket is provided with a thermometer (TIA 01) and electric heating, and the first thermometer (TIA 01) is interlocked with the electric heating for control.
6. The high-purity liquid chlorine tank truck unloading device according to claim 1, characterized in that: one end that liquid phase oil filling riser (L01B) and liquid chlorine tank wagon (V01) liquid phase mouth link to each other sets up second pneumatic switch valve (AV 02), the one end that gaseous phase oil filling riser (L01A) and liquid chlorine tank wagon (V01) gaseous phase mouth link to each other sets up first pneumatic switch valve (AV 01).
7. The unloading method using the unloading device of the high-purity liquid chlorine tank truck as claimed in any one of claims 1 to 6, characterized in that: the method comprises the following steps:
1) the crane tube is connected: a gas phase filling arm (L01A) and a liquid phase filling arm (L01B) of the liquid chlorine filling arm (L01) are respectively connected with a gas phase port and a liquid phase port of the liquid chlorine tanker (V01); opening a second pneumatic switch valve (AV 02) of a liquid phase filling pipe (L01B) and a first pneumatic switch valve (AV 01) of a gas phase filling pipe (L01A), wherein a first valve (MV 01) and a second valve (MV 02) of a gas phase port and a liquid phase port of the tank car are in a closed state, a seventh pneumatic switch valve (AV 07) of a filling pipe communicating pipe (L02) is in an open state, and other pneumatic switch valves are in a closed state;
2) pressure maintaining and leakage testing: opening a third pneumatic switch valve (AV 03) on a nitrogen pipeline (L08), closing the third pneumatic switch valve (AV 03) when the pressure of a crane connecting pipe (L02) reaches a set value, and keeping the set pressure for a set time; if the pressure is not changed, the liquid chlorine filling riser (L01) is well connected with the liquid chlorine tanker (V01);
3) vacuumizing and purging: opening a fourth pneumatic switch valve (AV 04) and a fifth pneumatic switch valve (AV 05) of the Venturi vacuum pump, vacuumizing and purging the crane pipe communicating pipe (L02) and the crane pipe (L01), continuously purging for a set time, and closing the fourth pneumatic switch valve (AV 04) and the fifth pneumatic switch valve (AV 05) after the purging is finished;
4) secondary pressure maintaining and leakage testing: opening a third pneumatic switch valve (AV 03), closing the third pneumatic switch valve (AV 03) when the pressure of the loading arm connecting pipe reaches a set value, and keeping the set pressure for a set time; if the pressure is not changed, the liquid chlorine filling riser (L01) is connected with the liquid chlorine tanker (V01) completely;
5) secondary vacuumizing and purging: opening a fourth pneumatic switch valve (AV 04) and a fifth pneumatic switch valve (AV 05) of the Venturi vacuum pump, vacuumizing and purging the crane pipe communicating pipe (L02) and the crane pipe (L01), continuously purging for a set time, and closing the fourth pneumatic switch valve (AV 04) and the fifth pneumatic switch valve (AV 05) after the purging is finished;
6) sampling and analyzing: closing a seventh pneumatic switch valve (AV 07) of a loading arm communicating pipe (L02), opening a first valve (MV 01) and a second valve (MV 02) of a liquid chlorine tanker (V01), then opening a sixth pneumatic switch valve (AV 06) of a gas phase analysis pipeline (L11) and an eighth pneumatic switch valve (AV 08) of a liquid phase analysis pipeline (L12) in sequence for sampling analysis, and closing a sixth pneumatic switch valve (AV 06) and an eighth pneumatic switch valve (AV 08) after sampling;
7) gasification, pressurization and discharge: after sampling and analysis are qualified, opening a tenth pneumatic switch valve (AV 10) at the bottom outlet of a second liquid chlorine storage tank (V03), a liquid chlorine metering pump (P01), an eleventh pneumatic switch valve (AV 11) of a chlorine pressurization pipeline (L03), a twelfth pneumatic switch valve (AV 12) of a liquid chlorine discharge pipeline (L04) and a thirteenth pneumatic switch valve (AV 13) at the inlet of a first liquid chlorine storage tank (V02), simultaneously heating a liquid chlorine gasifier (E01), and closing the valves after unloading;
8) pressure relief and backflow: a fifteenth pneumatic switch valve (AV 15) of a pressure relief pipeline (L09) is opened, the liquid chlorine tank car (V01) and a loading arm (L01) are depressurized, when the pressure of the loading arm communication pipe (L02) is reduced to a set value, the fifteenth pneumatic switch valve (AV 15) of the pressure relief pipeline (L09) is closed, a sixteenth pneumatic switch valve (AV 16) of a loading arm liquid return pipeline is opened, the residual liquid chlorine of the loading arm (L01) is pressurized into the liquid chlorine tank car (V01), and a sixteenth pneumatic switch valve (AV 16) of the loading arm liquid return pipeline (L10), a first valve (MV 01) and a second valve (MV 02) of the liquid chlorine tank car (V01) are closed;
9) vacuumizing and blowing and maintaining the pressure at negative pressure: and (3) opening a fourth pneumatic switch valve (AV 04) and a fifth pneumatic switch valve (AV 05) of the Venturi vacuum pump, vacuumizing and purging the crane pipe communicating pipe (L02) and the crane pipe (L01) for a set duration, closing the fourth pneumatic switch valve (AV 04) and the fifth pneumatic switch valve (AV 05), maintaining the pressure for the set duration, and if the pressure is not changed, confirming that the first valve (MV 01) and the second valve (MV 02) of the liquid chlorine tank truck (V01) are closed well.
8. The unloading method of the unloading device of the high-purity liquid chlorine tank truck according to claim 7, characterized in that: the liquid chlorine vaporizer (E01) was heated in a water bath and the temperature was controlled at 30 ℃.
CN201910812078.6A 2019-08-30 2019-08-30 High-purity liquid chlorine tank truck unloading device and unloading method thereof Pending CN110762387A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910812078.6A CN110762387A (en) 2019-08-30 2019-08-30 High-purity liquid chlorine tank truck unloading device and unloading method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910812078.6A CN110762387A (en) 2019-08-30 2019-08-30 High-purity liquid chlorine tank truck unloading device and unloading method thereof

Publications (1)

Publication Number Publication Date
CN110762387A true CN110762387A (en) 2020-02-07

Family

ID=69329283

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910812078.6A Pending CN110762387A (en) 2019-08-30 2019-08-30 High-purity liquid chlorine tank truck unloading device and unloading method thereof

Country Status (1)

Country Link
CN (1) CN110762387A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111649239A (en) * 2020-05-29 2020-09-11 新疆中泰纺织集团有限公司 Sodium hypochlorite conveying device for viscose fiber production refining process and use method thereof
CN114506810A (en) * 2022-02-24 2022-05-17 湖北兴福电子材料有限公司 Safe unloading device and method for liquid sulfur trioxide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111649239A (en) * 2020-05-29 2020-09-11 新疆中泰纺织集团有限公司 Sodium hypochlorite conveying device for viscose fiber production refining process and use method thereof
CN114506810A (en) * 2022-02-24 2022-05-17 湖北兴福电子材料有限公司 Safe unloading device and method for liquid sulfur trioxide

Similar Documents

Publication Publication Date Title
CN203363663U (en) Nitrogen pressure control system for chemical storage tank
CN110762387A (en) High-purity liquid chlorine tank truck unloading device and unloading method thereof
CN102588740B (en) High-pressure and high-purity nitrogen distribution device for plume test platform and application method for device
CN106335866A (en) Device used for transferring liquid from inside of sealed container
CN104110574B (en) A kind of cryogenic gas condensate recovery system and method thereof
CN112503393B (en) System for automatically storing and transporting dangerous liquid
CN210950783U (en) High-purity liquid chlorine tank car device of unloading
CN204387677U (en) A kind of skid-mounted gas filling station
CN111120857A (en) Inflating device applied to gas transmission system
EP2311755B1 (en) Rescue device for treating leakage of dangerous chemicals and corresponding method
CN206469069U (en) A kind of trichlorosilane or silicon tetrachloride tank car discharging to storage tank discharging joint
CN212644225U (en) Inflating device applied to gas transmission system
CN204005219U (en) A kind of cryogenic gas condensate recovery system
CN212029159U (en) Fire-fighting water injection explosion-proof device for oil gas storage tank
CN213900732U (en) Device for recovering residual gas in gas cylinder
CN108044567A (en) Low-temperature storage tank perlite supplement fills out nozzle blind plate ball valve device for interchanging
CN110159925B (en) Concentrated sulfuric acid pneumatic conveying system
CN112516650A (en) Safety airbag for waste oil recovery pretreatment tank and explosion-proof system thereof
CN218237067U (en) Gas phase pressurizing device for unloading liquid chlorine tank truck
CN218409526U (en) Carbon dioxide fills dress device
CN111089228A (en) Ultra-pure SF6 pipeline gas transmission system
CN110159924A (en) Concentrated sulfuric acid pneumatic conveying process
CN111219594A (en) LNG storage tank gas transmission and replacement process
CN215479690U (en) Sealed oil discharge device of crude oil tank truck
CN209856762U (en) LNG gas station

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination