CN104828423A - Method for avoiding arene storage tank gaseous-phase burning explosion and held pressure damage - Google Patents

Method for avoiding arene storage tank gaseous-phase burning explosion and held pressure damage Download PDF

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CN104828423A
CN104828423A CN201510288346.0A CN201510288346A CN104828423A CN 104828423 A CN104828423 A CN 104828423A CN 201510288346 A CN201510288346 A CN 201510288346A CN 104828423 A CN104828423 A CN 104828423A
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China
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tank
nitrogen
valve
line
buffer tank
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CN201510288346.0A
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Chinese (zh)
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石宁
董国胜
孙冰
费轶
姜杰
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中国石油化工股份有限公司
中国石油化工股份有限公司青岛安全工程研究院
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Priority to CN201510288346.0A priority Critical patent/CN104828423A/en
Publication of CN104828423A publication Critical patent/CN104828423A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00Component parts, details or accessories for large containers
    • B65D90/22Safety features
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00Component parts, details or accessories for large containers
    • B65D90/48Arrangements of indicating or measuring devices

Abstract

The invention relates to a method for avoiding arene storage tank gaseous-phase burning explosion and held pressure damage. The method mainly solves the problems that in the prior art, the nitrogen consumption is large, and pumping shrinking is easily caused. According to the method for avoiding the arene storage tank gaseous-phase burning explosion and the held pressure damage, tail gas pipes on at least two storage tanks are connected with a total discharge pipe, an outlet of the total discharge pipe is connected with a buffer tank, an oxygen content detector is arranged on a gaseous-phase area of the buffer tank, a pipe for supplementing nitrogen and an adjusting valve are arranged on the gaseous-phase area, and the adjusting valve on the pipe for supplementing the nitrogen is adjusted according to data detected by the oxygen content detector; the buffer tank is connected with a safety water seal through a pipe, a water column pressure scope set for the safety water seal is larger than 20% of a working pressure scope of a breather valve. According to the technical scheme, the above problems are better solved, and the method can be used for avoiding the arene storage tank gaseous-phase burning explosion.

Description

避免芳烃储罐气相燃爆和被憋压破损的方法 Aromatics gas tanks to avoid the explosion and breakage of the methods are pressure -

技术领域 FIELD

[0001] 本发明涉及一种避免芳烃储罐气相燃爆和被憋压破损的方法。 [0001] The present invention relates to an aromatic hydrocarbon reservoir and vapor blasting methods avoid being damaged hold pressure.

背景技术 Background technique

[0002] 芳烃储罐气相经常处于爆炸氛围,为了防止可燃液体储罐气相爆炸,目前最常规最有效的办法就是采用气相氮气保护的方法,从储罐呼吸阀不断补充氮气,随着储罐的运行,氮气不停地补入和呼出,使罐内气相保持无氧状态。 [0002] arene gas tanks often in explosive atmospheres, in order to prevent explosion of combustible liquid gas tank, the most conventional way is to use the most effective method of nitrogen gas from the nitrogen tank breathing valve continuously added, as the tank running, into nitrogen and kept up exhaled, so that the tank remains free of oxygen gas. 采用该种方法对氮气的需求量较大,对氮气不富足的企业来讲运行成本较高,通过调研,炼厂内I立方米氮气的成本约I元。 With this method larger, higher demand for nitrogen in the nitrogen rich enterprises, not operating costs, through research, the refinery cost about I m ​​I-membered nitrogen. 因此目前常规方法将造成大量的氮气浪费,增加企业运行成本。 Therefore, the current conventional method will result in a large amount of nitrogen waste, increase business operating costs. 芳烃储罐气相经常处于爆炸氛围,为了防止芳烃储罐气相爆炸,最有效的办法就是采用气相氮气保护的方法,从储罐呼吸阀补充氮气,随着储罐运行,氮气不停地补入和呼出。 Aromatics gas tank often in explosive atmospheres, in order to prevent explosive gas tank aromatics, the most effective way is to use the method of nitrogen gas, a nitrogen gas added from the tank breathing valve, with the run tank, and nitrogen kept up into exhaled. 这种运行方式对于整个罐区的运行来说,氮气使用量巨大,这将造成大量的氮气浪费。 This mode of operation for the operation of the entire tank farm, a huge amount of nitrogen, which will cause a lot of nitrogen waste. 为了节约氮气,经常采用储罐气相联通、设置缓冲罐、在缓冲罐上加装呼吸阀、统一呼出或吸入空气的运行方式,一旦呼吸阀发生故障,这将造成整个罐区的储罐在超压或负压的状态下运行,极易造成储罐被抽瘪或憋压破损。 To conserve nitrogen gas is often used Unicom tank, a buffer tank installed in the buffer tank breathing valve, exhalation or inhalation of uniform air operation mode, once the breathing valve malfunction, which will cause the entire tank to tank in the super operation, the tank is very vulnerable to hold a deflated or damaged under pressure or a vacuum pressure state.

[0003] CN201410613961涉及一种保护储罐安全环保的方法,通过采用一种保护储罐安全环保的方法,将储罐中液体自身产生的气体通过气体总管、充气管进入压缩机,气体通过压缩机加压储存在缓冲罐中,作为正压保护气的一部分,当缓冲罐中储存的气体不满足各储罐的正压保护时,使用来自氮气入口管线的氮气进行补充,当缓冲罐内压力超过设计压力时,将多余气体通过去火炬或焚烧炉管线送火炬或焚烧。 [0003] CN201410613961 relates to an environmentally safe method for the protection tank, the tank is protected by use of a safe and environmentally friendly method, liquid gas tank itself produced by a gas manifold, the inflator tube into the compressor, by the gas compressor when stored in a pressurized buffer tank, as part of the protective gas pressure when the gas stored in the buffer tank does not satisfy the respective tank pressure protection, the use of nitrogen from the nitrogen inlet line to supplement the buffer tank when the pressure exceeds when the design pressure, the excess gas to the torch or torch incinerator feed line or by incineration. CN201320356393涉及一种用于化学品储罐的氮气压力控制系统,公开了一种用于化学品储罐的氮气压力控制系统,所述系统包括设置在储罐内的微压型传感器,设置在所述储罐上端与所述储罐相连通的补气阀,排气阀,所述补气阀与单向阀、过滤器、泄压阀、调压阀串联连接,所述调压阀与氮气罐连接,所述微压型传感器根据储罐内的压力将信号传递向PLC控制器,所述PLC控制器根据所接收的信号控制所述补气阀和排气阀的开启或闭合。 CN201320356393 relates to a system for controlling the nitrogen pressure storage tanks for chemicals, discloses a system for controlling the nitrogen pressure storage tank for the chemical, the system comprises a micro pressure sensor disposed within the tank, provided the said reservoir tank communicates with the upper end of the fill valve, an exhaust valve, a fill valve and check valves, filters, pressure relief valves, pressure regulating valve connected in series with the pressure regulating valve nitrogen tank connected to a micro pressure sensor in the tank depending on the pressure signal transmitted to the controller PLC, the PLC controller and the fill valve opening or closing of the exhaust valve in accordance with the control signal received. CN201120095334涉及一种常压储罐氮气保护装置,包括常压储罐,还包括氮气储罐和氮封筒,常压储罐顶部安装有压力传感器,该压力传感器通过控制器与第一电磁阀和第二电磁阀连接,来保证常压储罐内氮气的基本稳定。 CN201120095334 relates to an atmospheric tank means nitrogen, including atmospheric tank, further comprising a nitrogen tank and nitrogen sealing tube, is attached to the tank top of an atmospheric pressure sensor, the pressure sensor by the controller to the first and second solenoid valves two solenoid valves are connected, to ensure substantially stable nitrogen in atmospheric tanks.

[0004] 上述专利是通过压力传感器来监测氮气含量,进而控制氮气的补气与排气,使压力维持在设定的范围内。 [0004] The above patent is monitored by a pressure sensor the nitrogen content, thereby controlling the exhaust qi nitrogen, the pressure is maintained within a set range. 但是其实仅仅依靠压力无法精确保证储罐是否处于气相爆炸氛围,对储罐本身的密封性要求极高,若出现泄漏,或者对于存在呼吸阀的储罐,则存在一定的安全隐患。 But in fact, the pressure alone can not guarantee the accuracy tank is in the vapor explosion atmosphere, high sealing requirements for the tank itself, if the leak, or for the presence of the tank breathing valve occurs, there is a certain security risk. 而且仅在一定程度上控制、减少了氮气用量,仍需消耗大量纯氮气。 But only to a certain extent to control, reduce the amount of nitrogen, still consume large amounts of pure nitrogen.

[0005] 本发明有针对性的解决了该问题。 There [0005] The present invention is targeted to solve this problem.

发明内容 SUMMARY

[0006] 本发明所要解决的技术问题是现有技术中氮气消耗较大、易被抽瘪的问题,提供一种新的避免芳烃储罐气相燃爆和被憋压破损的方法。 [0006] The present invention solves the technical problem in the prior art a large consumption of nitrogen, problems easily deflated, to provide a new gas tank to avoid aromatics pressure - blasting and methods are damaged. 该方法用于防止芳烃储罐气相燃爆中,具有氮气消耗较小、不易被抽瘪的优点。 The method for preventing aromatic vapor blasting tank having a smaller consumption of nitrogen is not easily drawn advantages deflated.

[0007] 为解决上述问题,本发明采用的技术方案如下:一种避免芳烃储罐气相燃爆和被憋压破损的方法,至少两个储罐上的尾气管线与总排放管线相连,总排放管线出口与缓冲罐相连,在缓冲罐顶部设置呼吸阀,在缓冲罐的气相区域上设置氧气含量检测仪,并在所述气相区域上设置补充氮气的管线及调节阀门,根据氧气含量检测仪的检测数据调节补充氮气管线上的调节阀门,当缓冲罐内气相氧气体积含量高于9.0%时,打开所述调节阀门通入氮气;当缓冲罐内气相氧气体积含量低于9.0%时,关闭所述调节阀门停止通入氮气,保证各储罐的气相中的氧气体积含量低于9.0% ;其中,所述储罐上不设置呼吸阀,缓冲罐通过管线与安全水封相连,安全水封设置的水柱压力范围大于呼吸阀工作压力范围的20%以上。 [0007] In order to solve the above problems, the present invention employs the following technical solution: an aromatic hydrocarbon reservoir and vapor blasting methods avoid being damaged hold pressure, the exhaust line is connected to at least two tanks and the total discharge line, total emissions a buffer tank connected to the outlet pipe, disposed at the top of the buffer tank breather valve provided on the oxygen content in the gas phase detector area of ​​the buffer tank, and a line provided on the supplementary nitrogen gas region and regulating valve according to the oxygen content detector modulating valve on detection data supplemental nitrogen line, when the buffer tank vapor content of more than 9.0% oxygen by volume, the adjustment valve opening through nitrogen; gas buffer tank when the oxygen content is less than 9.0% by volume, the closed said regulator valve stopping the flow of nitrogen gas to ensure the oxygen content of the gas phase in each tank volume is less than 9.0%; wherein the breather valve is not provided on the storage tank, the buffer tank is connected via line security seal, the security seal is provided the water pressure is greater than the range of 20% or more breathing valve operating pressure range.

[0008] 上述技术方案中,优选地,所述补充氮气管线上的调节阀门为气动阀。 [0008] In the above aspect, preferably, the supplementary adjustment valve on the nitrogen gas line is a pneumatic valve.

[0009] 上述技术方案中,优选地,所述氧气含量检测仪通过数据线与调节阀门相连。 [0009] In the above aspect, preferably, the oxygen content tester via a data line connected to the regulator valve.

[0010] 上述技术方案中,优选地,所述芳烃为苯、甲苯、二甲苯、邻二甲苯、间二甲苯、对二甲苯、混苯、乙苯、C9以上重芳径。 [0010] In the above aspect, preferably, the aromatic hydrocarbon is benzene, toluene, xylene, o-xylene, m-xylene, p-xylene, mixed benzene, ethylbenzene, C9 or more heavy aromatic diameter.

[0011] 本专利使用氧气含量检测仪,根据可燃液体的燃爆特点,采用部分氮气与空气混合,通过精确控制气相氧气体积含量低于设定值,就可达到防止气相燃爆的目的,做到本质安全。 [0011] This patent uses oxygen content detector, according to the characteristics of combustible liquid blasting, using some of the nitrogen mixed with air, below the set value by precisely controlling the vapor volume content of oxygen, can achieve the purpose of preventing gas explosion, do to intrinsically safe. 同时将罐区的储罐尾气排放管线连接起来,最终经过一个出口统一排放,由于各储罐呼吸频率不同,各储罐气相之间可以互相平衡。 The tank while the tank exhaust gas discharge line connected, through a final uniform discharge outlet, due to the different storage tanks in each respiratory rate, between the gas tank can be balanced with each other. 这将大大减少氮气的使用量,减少尾气的排放,达到防止罐区燃爆,减少排放的目的。 This will greatly reduce the amount of nitrogen to reduce exhaust emissions, to prevent explosion tank, the purpose of reducing emissions. 同时在缓冲罐上增加安全水封,当呼吸阀出现故障时,罐区可以通过突破安全水封来呼出或吸入空气,取得了较好的技术效果。 Seal while increasing safety in the buffer tank, when the breathing valve malfunction, tank or the intake air can be exhaled through the seal to break security, better technical effect achieved.

附图说明 BRIEF DESCRIPTION

[0012] 图1为本发明所述方法的流程示意图。 [0012] Fig 1 a schematic flow chart of the method of the present invention.

[0013] I为缓冲罐;2为呼吸阀;3为调节阀门;4为氧气含量检测仪;5为补充氮气管线;6为空气入口;7为尾气出口;8为数据线;9为储罐;10为总排放管线;11为储罐尾气排放管线;12为安全水封。 [0013] I buffer tank; breathing valve 2; 3 is a regulator valve; 4 oxygen content detector; nitrogen line was added to 5; 6 to an air inlet; exhaust outlet 7; 8 data lines; tank 9 ; total discharge line 10; line 11 to storage tank emissions; security seal 12.

[0014] 下面通过实施例对本发明作进一步的阐述,但不仅限于本实施例。 [0014] The following examples of the present invention will be further illustrated by, but is not limited to this embodiment.

具体实施方式 Detailed ways

[0015]【实施例1】 [0015] [Example 1]

[0016] 一种避免甲苯储罐气相燃爆和被憋压破损的方法,采用的装置包括两个储罐(9)、缓冲罐(1)、呼吸阀(2)、氧气含量检测仪(4)、补充氮气管线(5)、调节阀门(3),两个储罐 [0016] Toluene tank vapor pressure - blasting and methods are damaged avoid using apparatus comprising two tanks (9), the buffer tank (1), the breathing valve (2), the oxygen content of the detector (4 ) supplemented with a nitrogen line (5), regulating valve (3), two tanks

(9)的气相空间均通过尾气排放管线与总排放管线(10)相连,总排放管线(10)出口与缓冲罐(I)顶部相连,呼吸阀(2) —端与缓冲罐(I)的气相空间相连,呼吸阀(2)上设有空气入口(6)和尾气出口(7),其特征在于氧气含量检测仪(4)设置于缓冲罐(I)的气相空间上,补充氮气管线(5)与缓冲罐(I)的气相空间相连,调节阀门(3)设置于补充氮气管线(5)上,氧气含量检测仪(4)通过数据线与调节阀门(3)相连。 (9) vapor space average (10) is connected through the exhaust vent line with a total discharge line, (10) the outlet of the buffer tank (I) is connected to the top of the overall exhaust line, the breathing valve (2) - the end of the buffer tank (I) is is connected to the vapor space, the breathing valve is provided with an air inlet (6) and the exhaust outlet (7) (2), characterized in that the oxygen content detector (4) disposed on the buffer tank (I) in the vapor space, supplemental nitrogen line ( 5 is connected) and the buffer tank (I) in the vapor space, regulator valve (3) provided on the supplementary nitrogen gas line (5), the oxygen content of the detector (4) connected via a data line with the regulator valve (3). 其中,缓冲罐(I)上部通过管线与安全水封(12)相连。 Wherein the buffer tank (I) is connected to the upper portion (12) through line security seal.

[0017] 在储罐(9)运行过程中,缓冲罐(I)上的呼吸阀(2)根据出料和进料要求,仍然正常吸入、呼出空气。 [0017] In the process (9) runs in the tank, the breathing valve (2) in the buffer tank (I) according to the requirements and the feed material is still normal inhalation, exhalation air. 只是在缓冲罐(I)气相设置氧气含量检测仪(4),检测气相氧含量的变化;在缓冲罐顶部设置补充氮气管线(5),该管线加装气动调节阀门(3),该控制阀门根据罐内氧含量检测数据进行调节。 Only in the buffer tank (I) provided oxygen content gas detector (4), detecting a change in the oxygen content of the gas; nitrogen provided supplementary line (5) at the top of the buffer tank, the installation of pneumatic control line valve (3), the control valve adjusted according to the oxygen content of the tank detection data. 当缓冲罐内气相氧气含量高于9.0%时,自动打开阀门通入氮气,直至缓冲罐内气相氧体积含量低于9.0%;当气相氧气体积含量低于9.0 %时,自动关闭阀门停止通入氮气。 When the buffer tank vapor content of more than 9.0% oxygen, the valve opens automatically purged with nitrogen until the buffer tank volume of oxygen gas content of less than 9.0%; when the gas content of less than 9.0% by volume of oxygen, stopping the flow of self-closing valves nitrogen. 通过以上的控制回路,保证缓冲罐气相的氧体积含量低于9.0%。 By the above control circuit to ensure that the oxygen content of the buffer tank volume of gas is less than 9.0%. 在节省氮气的情况下,防止芳烃储罐气相发生燃爆。 In the case of saving nitrogen, to prevent the occurrence of aromatic vapor blasting tank. 同时,缓冲罐上的安全水封设置的水柱压力范围应高于呼吸阀工作压力范围20%,当呼吸阀正常工作时,安全水封确保封闭有效,当呼吸阀出现故障时,罐区可以通过突破安全水封来呼出或吸入空气,防止储罐在超压或负压状态下运行。 At the same time, the range of water pressure safety seal is provided on the buffer tank should be 20% higher than the operating pressure range breathing valve, when the breathing valve is working properly, the security seal to ensure effective closure when the breathing valve malfunction, can tank security seal to break or exhaled air intake, to prevent the tank operated at negative pressure or overpressure. 在大大节省氮气的情况下,防止芳烃储罐气相发生燃爆,防止储罐被抽瘪或憋压破损。 In the case of saving nitrogen, to prevent the occurrence of aromatic vapor blasting the tank to prevent the tank pressure - being deflated or damaged.

[0018] 采用本发明的装置,与完全使用氮气保护储罐比较,至少可以节省71.5%的氮气,而达到的安全效果完全一致。 [0018] The apparatus of the present invention, compared with the full use of nitrogen tank, can save at least 71.5% of nitrogen, to achieve exactly the same security effect. 同时若与其他使用压力传感器来监测控制氮气的补气与排气的情况相比,不仅可以节省氮气,安全性也大大提高。 When used simultaneously with other sensors to monitor and control pressure nitrogen qi compared with the case of the exhaust gas, not only nitrogen gas can be saved, but also greatly improved safety. 同时,防止了储罐被抽瘪或憋压破损。 At the same time, preventing the tank pressure - being deflated or damaged.

[0019]【实施例2】 [0019] [Example 2]

[0020] 按照实施例1所述的条件,只是储罐数量为3个,至少可以节省81%的氮气,而达到的安全效果完全一致。 [0020] according to the procedure in Example 1, except that the number of three tanks, can save at least 81% of nitrogen, to achieve exactly the same security effect. 同时,防止了储罐被抽瘪或憋压破损。 At the same time, preventing the tank pressure - being deflated or damaged.

[0021]【实施例3】 [0021] [Example 3]

[0022] 按照实施例1所述的条件,只是储罐数量为4个,至少可以节省85.8%的氮气,而达到的安全效果完全一致。 [0022] according to the procedure in Example 1, except for the number of tanks 4, at least 85.8% of nitrogen can be saved, to achieve exactly the same security effect. 同时,防止了储罐被抽瘪或憋压破损。 At the same time, preventing the tank pressure - being deflated or damaged.

Claims (4)

1.一种避免芳烃储罐气相燃爆和被憋压破损的方法,至少两个储罐上的尾气管线与总排放管线相连,总排放管线出口与缓冲罐相连,在缓冲罐顶部设置呼吸阀,在缓冲罐的气相区域上设置氧气含量检测仪,并在所述气相区域上设置补充氮气的管线及调节阀门,根据氧气含量检测仪的检测数据调节补充氮气管线上的调节阀门,当缓冲罐内气相氧气体积含量高于9.0%时,打开所述调节阀门通入氮气;当缓冲罐内气相氧气体积含量低于9.0%时,关闭所述调节阀门停止通入氮气,保证各储罐的气相中的氧气体积含量低于9.0% ;其中,所述储罐上不设置呼吸阀,缓冲罐通过管线与安全水封相连,安全水封设置的水柱压力范围大于呼吸阀工作压力范围的20%以上。 An aromatic hydrocarbon storage tanks to avoid vapor explosion is broken and the pressure hold method, the exhaust line is connected to at least two tanks and the total discharge line, an outlet line connected to total emissions of the buffer tank, breathing valve is provided at the top of the buffer tank , the buffer area is provided on a gas tank of oxygen content detector, and supplementary nitrogen gas line is provided and the valve in the gas phase region, the modulating valve on the nitrogen line supplemental oxygen content according to the detection data of the detector, when the buffer tank when the oxygen gas content of more than 9.0% by volume, the regulating valve opening into nitrogen gas; the buffer tank when the oxygen gas content of less than 9.0% by volume, closing the regulating valve stopping the flow of nitrogen gas to ensure that each tank the oxygen content of less than 9.0% by volume; wherein the breather valve is not provided on the storage tank, the buffer tank is connected via line security seal, water pressure is greater than the range of the security seal breathing valve provided more than 20% of the working pressure range .
2.根据权利要求1所述避免芳烃储罐气相燃爆和被憋压破损的方法,其特征在于所述补充氮气管线上的调节阀门为气动阀。 According to claim 1 avoids the aromatic hydrocarbon reservoir and a method of vapor pressure - blasting damage, characterized in that the regulating valve on the supplemental nitrogen line to pneumatic valve.
3.根据权利要求1所述避免芳烃储罐气相燃爆和被憋压破损的方法,其特征在于所述氧气含量检测仪通过数据线与调节阀门相连。 Tank according to claim aromatic vapor pressure - blasting and methods are to avoid the breakage of the 1, characterized in that the oxygen content tester via a data line connected to the regulator valve.
4.根据权利要求1所述避免芳烃储罐气相燃爆和被憋压破损的方法,其特征在于所述芳烃为苯、甲苯、二甲苯、邻二甲苯、间二甲苯、对二甲苯、混苯、乙苯、C9以上重芳烃。 1 according to the vapor explosion and avoid aromatics tank pressure - methods are damaged claim, wherein said aromatic hydrocarbon is benzene, toluene, xylene, o-xylene, m-xylene, p-xylene, mixed benzene, ethylbenzene, C9 or more heavy aromatics.
CN201510288346.0A 2015-05-29 2015-05-29 Method for avoiding arene storage tank gaseous-phase burning explosion and held pressure damage CN104828423A (en)

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