• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. A method of withdrawing gases that occur during the decomposition of ethylene in high-pressure apparatus, which consists in removing gases from the apparatus when the safety device in the wall of the apparatus breaks down to the external environment through a chimney, in order to increase the fire and anti-hazardous process, in part of the chimney directly behind the safety device, the nitrogen atmosphere is maintained at a pressure of 1.2 bar by the nitrogen shutter in the middle part of the chimney at a pressure of 1.4 bar. 2. A device for the removal of gases, through the decomposition of ethylene in high-pressure apparatus, which is a pipe-like chimney, directly connected to the apparatus under high pressure and separated from it by a safety device in the apparatus wall, characterized by In order to increase the fire and explosion-safety of the process, the chimney contains a shutter in the form of a rubber balloon located in the middle part of the chimney throughout its cross section, and two nitrogen distribution systems, the first of which connect ene with a chimney in a portion between the safety device and the gate, and the second - By direct On a governmental seal. Oh
    公开号:SU1122231A3
    申请号:SU802909903
    申请日:1980-04-21
    公开日:1984-10-30
    发明作者:Дюран Пьер；Жуффруа Ги
    申请人:Сосьете Шимик Де Шарбоннаж (Фирма)；
    IPC主号:
    专利说明:

     one
    The invention relates to a process for polymerizing ethylene using a high pressure method, in particular, to a method for evacuating gases generated during the decomposition of ethylene in high pressure apparatus, and to a device for its implementation, and can be used in the chemical industry.
    During the polymerization reaction of ethylene under high pressure (approximately from 300 to 3000 bar) and at a high temperature (approximately 150,350 ° C) some undesirable effects during the operation of the installation, such as mechanical damage or insufficient purity of ethylene gas, despite careful control of parameters pressures and temperatures can cause heating up to a temperature of 450 ° C, an ethylene fraction, even the most insignificant, contained in the polymerization reactor or in the separator (usually operating under pressure from tOO to 500 bar) This heating is sufficient to cause decomposition of this fraction of ethylene to a mixture of carbon, hydrogen and methane. In addition to Toroj, the specified operating conditions of the reactor and the separator allow for the rapid expansion of all the commenced decomposition, which leads to a rapid increase in pressure and / or temperature. All THAT can cause ignition of decomposition gases, causing violent explosions that can cause material damage and damage people.
    There is a known method for removal of gases released during the decomposition of ethylene in high-pressure apparatus, which consists in removing gases from the apparatus when the safety device in the apparatus wall is destroyed in the external environment through a chimney, as well as a device for its implementation, which is a tubular chimney directly connected with a high-pressure apparatus and separated from it by a safety device in the wall of the apparatus l).
    The disadvantage of this method and. the device is the increased fire and explosion hazard of the process, as in the case of overheating of the gases inside the apparatus and the safety device is released, the gases in the chimney end 222312
    they are clocked with air and due to the reaction of the components of the gases of decomposition with the oxygen of the ascending oxygen, gases can self-ignite and explode. 5 The purpose of the invention is to increase the fire and explosion safety of the process.
    The goal is achieved by the fact that, according to the method of removal of gases involved in the decomposition
    10 ethylene in the apparatus under high pressure. involving the introduction of gases from the apparatus when the safety device is destroyed in the wall of the apparatus into the external environment through
    15 chimney 5 in part of the chimney directly behind the safety device maintains a nitrogen atmosphere at a pressure of 1.2 bar due to the nitrogen gate in the middle part of the chimney
    20 at a pressure of 1.4 bar.
    In addition, in the device for the removal of gases, the release of ethylene in the high-pressure apparatus, which is a pipe-like chimney directly connected to the apparatus under high pressure and separated from it by a safety device in the wall of the apparatus, has a rubber-shaped shutter a cylinder located in the middle part of the chimney throughout its cross section, and two nitrogen distribution systems, the first of which is connected to the chimney by a pipe in the part between the safety device and
    shutter, and the second - directly
    with shutter.
    The drawing shows the proposed device for the removal of gases resulting from the decomposition of ethylene in apparatus under high pressure.
    The numeral 1 denotes a high-pressure vessel located vertically, in which either the polymerization reaction of this foam (reactor) or the resultant is carried out; polymerization of polyethylene and unreacted ethylene (separator). The high pressure vessel 1 is usually cylindrical or tubular in shape. In addition, at one of its side walls, designated 2D, if necessary, when its contents are to be removed, vessel t communicates with a chimney-type gas outlet network consisting of the first rounded section 3 immediately adjacent to the pressure vessel, medium section 4 and top section 5, with the last two ceKij iH arranged vertically. Section 3 is necessary only when the vessel is arranged vertically, and there is no need for this section when the vessel is located horizontally as in the case of a tubular reactor. The vessel 1 and section 3 (or section 4 in the case when section 3 is not necessary) are separated by a safety device 6, shown schematically in this figure and prone to rupture due to burst pressure exceeding the maximum pressure of the normal operation of the vessel 1. The inert gas distribution system 7 nitrogen) communicates with the section of the chimney through the pipe 8, which is equipped with a valve 9, regulating the volume of inert gas supplied to the gas exhaust network and, therefore, regulating the pressure inside this network from ode gases, which must be maintained equal to 1.2 bar. The closure 10, for example, in the form of a rubber ball, occupying the entire cross section of the gas removal system, separates sections 4 and 5 of this outlet network. The inert gas (nitrogen) distribution system 11 communicates with the ball 10 through a pipe 12, on which an inlet device 13 is installed, regulating the volume of inert gas supplied to the ball 10 and, therefore, regulating the pressure inside this valve, which must be maintained equal to 1 , 4 bars. Example 1 (comparative). According to the drawing, ethylene is injected into a vessel 1 connected to a chimney by means of a bursting membrane designed for a pressure of 2000 bar at 200 ° C at a pressure of 1500 bar. Continuing the slow introduction of ethylene under pressure, it is ascertained that when the pressure of ethylene reaches a value of 2000 bar, there is a rupture of the membrane, accompanied by an explosion felt within a radius of 1500 m, and a burst of burning gas at the exit of the chimney. Example 2. The device used in Example 1 is complemented by a nitrogen distribution installation (7.8, 9), a rubber balloon 10 connected to a nitrogen-containing reservoir 11, by means of a nozzle 12, and an inlet 13. From vessel 3 is pumped out air that is replaced by nitrogen supplied from a nitrogen distribution plant. At this time, the balloon 10 will be blown away. Then in a cylinder 10 yakachivat nitrogen to a pressure of 1.4 bar and regulate the pressure of nitrogen in the middle section of the chimney to a value of 1.2 bar. After that, as in Example 1, the pressure of ethylene is increased and the vessel 1 is heated. The pressure and temperature values, as well as the pressure at which membrane 6 is ruptured, are identical to those of Example 1. When the pressure inside chamber 1 reaches 2000 bar and the temperature is 200 C, there is observed a rupture of the membrane 6, which is not accompanied by the ignition of the gas escaping from the upper section 5 of the chimney, or an explosion.
    权利要求:
    Claims (2)
    [1]
    1. The method of removal of gases generated during the decomposition of ethylene in high-pressure apparatuses, which consists in removing gases from the apparatus when the safety device in the apparatus wall is destroyed into the external environment through a chimney, which is designed to increase fire and In addition to the explosion safety of the process, in the chimney part, directly behind the safety device, a nitrogen atmosphere is maintained at a pressure of 1.2 bar due to a nitrogen shutter in the middle part of the chimney at a pressure of 1.4 bar.
    [2]
    2. A device for the removal of gases vyschelivayuschiysya in the decomposition of ethylene
    类似技术:
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    同族专利:
    公开号 | 公开日
    CA1142184A|1983-03-01|
    MX155606A|1988-04-06|
    JPS6019926B2|1985-05-18|
    DE3061863D1|1983-03-17|
    JPS568414A|1981-01-28|
    ES490851A0|1980-12-01|
    PT71118A|1980-05-01|
    AT2396T|1983-03-15|
    EP0018882A1|1980-11-12|
    CS221548B2|1983-04-29|
    EP0018882B1|1983-02-09|
    GR68046B|1981-10-29|
    MA18813A1|1980-12-31|
    BR8002519A|1980-12-09|
    US4339412A|1982-07-13|
    US4424319A|1984-01-03|
    FR2455238B1|1982-10-29|
    ES8100718A1|1980-12-01|
    FR2455238A1|1980-11-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2317838A|1940-09-14|1943-04-27|Wests Gas Improvement Co Ltd|Retort discharge mechanism|
    US2871106A|1956-09-26|1959-01-27|Gulf Research Development Co|Safety device|
    GB1313458A|1970-11-27|1973-04-11|Stamicarbon|Process and installation for the preparation of homo- or copolymers of ethylene|
    FR2165018A5|1971-12-14|1973-08-03|Ethylene Plastique Sa|
    DE2631834C3|1976-07-15|1980-05-14|Basf Ag, 6700 Ludwigshafen|Process for the expansion of ethylene high pressure polymerization systems|
    US4255387A|1978-12-29|1981-03-10|El Paso Polyolefins Company|High pressure tubular reactor apparatus|FR2455239B1|1979-04-25|1982-10-29|Charbonnages Ste Chimique|
    JPH0632906B2|1985-10-18|1994-05-02|富士写真フイルム株式会社|Polishing tape for magnetic head polishing|
    JPS62180514A|1986-02-03|1987-08-07|Jikou Denshi Kk|Cleaning disk|
    DE3633819A1|1986-10-04|1988-04-14|Basf Ag|SEPARATION SYSTEM FOR REDUCING SOLID EMISSIONS IN RELAXATION PRIORITIES AT HIGH PRESSURE POLYMERIZATION REACTORS|
    DE3641513A1|1986-12-04|1988-06-09|Basf Ag|METHOD FOR REDUCING THE EMISSION OF HYDROCARBONS IN RELAXATION PROCEDURES ON HIGH PRESSURE POLYMERIZATION REACTORS|
    US5077018A|1987-06-12|1991-12-31|Westinghouse Electric Corp.|Vented safety vessel with acoustic trap for rarefaction waves|
    GB2242517B|1990-02-01|1993-12-08|Conoco Inc|Reactor vessel discharge|
    FR2730791B1|1995-02-17|1997-04-30|Mulhouse Dornach Ind Chimique|SAFETY DEVICE OF A GAS OR VAPOR PRESSURE APPARATUS|
    DE102010035517A1|2010-08-25|2012-03-01|Rembe Gmbh Safety + Control|Device against the propagation of explosions|
    US8755947B2|2011-07-19|2014-06-17|Nova ChemicalsS.A.|Roller detection|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7910443A|FR2455238B1|1979-04-25|1979-04-25|
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