CN104697290A - Recovery system for extra nitrogen from fractionating tower in oxygen generating equipment and application method - Google Patents
Recovery system for extra nitrogen from fractionating tower in oxygen generating equipment and application method Download PDFInfo
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 228
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 114
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 239000001301 oxygen Substances 0.000 title claims abstract description 108
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000011084 recovery Methods 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 39
- 238000007689 inspection Methods 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 6
- 230000008929 regeneration Effects 0.000 claims description 4
- 238000011069 regeneration method Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000012372 quality testing Methods 0.000 claims 2
- 239000000356 contaminant Substances 0.000 claims 1
- 238000002474 experimental method Methods 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 claims 1
- 238000013022 venting Methods 0.000 abstract description 19
- 238000005194 fractionation Methods 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
本发明涉及空分行业，具体讲是一种制氧设备中分馏塔多余氮气的回收系统及使用方法，即利用制氧设备中，分馏塔多余的氮气放空，作为压力容器定期检验时，强度及严密性试验介质的使用。在现有技术中压力容器定期检验时，检验单位采用外购氮气瓶向压力容器充入氮气，达到其强度及严密性试验压力，数量相当可观。对于制氧设备除生产氧气外，还生产氮气，其品质好，干燥、纯净，在不用氮气的单位，大多全部放空。本发明是根据制氧设备自身的特点，将氮气放空管加以改造，利用原有的氧压机对管路进行局部改造，使之可以压缩氮气，作为压力容器检验时的试验介质即安全又经济，且管路各接口都有阀门控制，可以留存，待下一周期试验继续使用，一劳永逸。
The present invention relates to the air separation industry, specifically a recovery system and usage method for excess nitrogen in fractionation towers in oxygen-generating equipment, that is, using the excess nitrogen in oxygen-generating equipment and fractionating towers to be vented and used as pressure vessels for regular inspections, the strength and The use of tightness test medium. During the regular inspection of pressure vessels in the prior art, the inspection unit uses purchased nitrogen cylinders to fill the pressure vessels with nitrogen to reach the strength and tightness test pressure, and the quantity is quite considerable. In addition to producing oxygen, oxygen production equipment also produces nitrogen, which is of good quality, dry and pure, and most of the units that do not use nitrogen are all vented. According to the characteristics of the oxygen-making equipment itself, the present invention reforms the nitrogen venting pipe, uses the original oxygen compressor to partially reform the pipeline, so that it can compress nitrogen, and it is safe and efficient as a test medium for pressure vessel inspection. It is economical, and each interface of the pipeline is controlled by a valve, which can be kept and used in the next cycle of tests, once and for all.
Description
技术领域：Technical field:
本发明涉及空分行业，具体讲是一种制氧设备中分馏塔多余氮气的回收系统及使用方法，即利用制氧设备中，分馏塔多余的氮气放空，作为压力容器定期检验时，强度及严密性试验介质的使用方法。The present invention relates to the air separation industry, specifically a recovery system and usage method for excess nitrogen in fractionation towers in oxygen-generating equipment, that is, using the excess nitrogen in oxygen-generating equipment and fractionating towers to be vented and used as pressure vessels for regular inspections, the strength and How to use the tightness test medium.
背景技术：Background technique:
压力容器作为重要的特种设备，关系到企业生产能否实现安全、稳定、长周期、优质运行，为保证压力容器管理工作的制度化、规范化、有效防止或减少事故发生，氧气站的压力管道及压力容器按照国家《压力容器安全技术监察规程》的规定，定期进行压力容器内、外部检验，之后必须进行强度及严密性试验，采用的介质应为空气或氮气，检验单位大都选用氮气作为试验介质，需要外购氮气瓶向压力容器充入氮气，而氮气瓶的储量有限，一瓶氮气按15MPa计算，容积最多6m3，而氮气瓶常温下的储量只有4.8m3，且低于欲试验的容器压力，气瓶无法再输出氮气，这样氮气瓶中的气体利用率最多只有80％，如检验两个100m3储氧罐至少需要1400瓶氮气，检验两个30m3储氧罐至少需要400瓶氮气，外购氮气瓶的价格加上运输等杂费，每次检验后需氮气瓶的数量、价格相当可观，才能达到其强度及严密性试验压力的要求。对于氧气站设备除生产氧气外，还生产氮气，其品质非常好，干燥、纯净，在不用氮气的单位，大多全部放空，将这部分氮气利用起来，作为压力容器检验后的试验介质即安全又经济。As important special equipment, pressure vessels are related to whether the production of enterprises can achieve safe, stable, long-term and high-quality operation. In order to ensure the institutionalization and standardization of pressure vessel management and effectively prevent or reduce accidents, the pressure pipelines and In accordance with the provisions of the national "Pressure Vessel Safety Technology Supervision Regulations", the pressure vessel is regularly inspected internally and externally, and then the strength and tightness test must be carried out. The medium used should be air or nitrogen, and most inspection units use nitrogen as the test medium. , it is necessary to purchase a nitrogen bottle to fill the pressure vessel with nitrogen, and the storage of the nitrogen bottle is limited. A bottle of nitrogen is calculated at 15MPa, and the volume is at most 6m 3 , while the storage of the nitrogen bottle at room temperature is only 4.8m 3 , which is lower than the volume to be tested. Container pressure, the gas cylinder can no longer output nitrogen, so the gas utilization rate in the nitrogen cylinder is only 80% at most. For example, at least 1400 bottles of nitrogen are needed to inspect two 100m 3 oxygen storage tanks, and at least 400 bottles are required to inspect two 30m 3 oxygen storage tanks Nitrogen, the price of purchased nitrogen cylinders plus transportation and other miscellaneous expenses, the quantity and price of nitrogen cylinders are quite considerable after each inspection, in order to meet the requirements of its strength and tightness test pressure. In addition to producing oxygen, the oxygen station equipment also produces nitrogen, which is of very good quality, dry and pure. In units that do not use nitrogen, most of them are emptied, and this part of nitrogen is used as a test medium after pressure vessel inspection, which is safe and efficient. economy.
发明内容：Invention content:
本发明的目的是利用制氧设备中分馏塔多余氮气的回收系统及使用方法，来替代外购氮气瓶向压力容器充入氮气作为试验介质。The purpose of the present invention is to use the recovery system and use method of excess nitrogen in the fractionation tower in the oxygen production equipment to replace the purchased nitrogen cylinder and fill the pressure vessel with nitrogen as the test medium.
本发明解决其技术问题所采用的技术方案是：The technical solution adopted by the present invention to solve its technical problems is:
一种制氧设备中分馏塔多余氮气的回收系统，其特征为：利用制氧设备中，分馏塔多余的氮气放空，作为压力容器定期检验时，强度及严密性试验介质的结构改造；A recovery system for excess nitrogen in fractionation towers in oxygen-generating equipment, characterized by: using the excess nitrogen in oxygen-generating equipment and fractionating towers to vent, as a structural modification of the strength and tightness test medium for regular inspections of pressure vessels;
所述的氮气放空作为压力容器试验介质的使用方法，其系统结构由四部分组成，第一部分从原有分馏塔1的氮气放空管，旁通连接一支管加球阀6控制氮气流量，氮气管路一直连接至氧压机室，原有的氮气再生补充阀2继续使用，原有氮气放空阀3用时可关闭，原有的分馏塔氧气出气阀4进入氧气主管道，原有的氧气进入氧压机进气阀5关闭；Described method of using nitrogen venting as a pressure vessel test medium, its system structure is composed of four parts, the first part is from the nitrogen venting pipe of the original fractionation tower 1, a bypass connects a pipe and adds a ball valve 6 to control the nitrogen flow, and the nitrogen pipe The original nitrogen regeneration replenishment valve 2 continues to be used, the original nitrogen vent valve 3 can be closed when in use, the original oxygen outlet valve 4 of the fractionating tower enters the oxygen main pipeline, and the original oxygen enters the oxygen Compressor intake valve 5 is closed;
第二部分将氮气管连接在氧压机原有旁通进气管之前再加一球阀7控制进氧压机氮气的流量、加一管道过滤器8清除氮气管路系统杂质、再通过原有的过滤器9进入氧压机10，关闭氧气至充瓶阀门11，打开原有氧气放空阀12，利用氧气放空管作为氮气出口；In the second part, connect the nitrogen pipe to the original bypass intake pipe of the oxygen compressor, add a ball valve 7 to control the flow of nitrogen into the oxygen compressor, add a pipeline filter 8 to remove impurities in the nitrogen pipeline system, and then pass through the original The filter 9 enters the oxygen compressor 10, closes the oxygen to the bottle filling valve 11, opens the original oxygen vent valve 12, and uses the oxygen vent pipe as the nitrogen outlet;
第三部分在氧气通往大气放空管下部连接三通13，加装控制放空流量球阀14和进入主管控制总氮气流量的球阀15，之后用管路及法兰16a、16b连接各支管，分别加支撑17a、17b、17c、17d使之平稳固定；The third part connects the tee 13 at the bottom of the oxygen vent pipe to the atmosphere, installs a ball valve 14 for controlling the vent flow and a ball valve 15 for entering the main pipe to control the total nitrogen flow, and then connects the branch pipes with pipelines and flanges 16a and 16b, respectively. Add support 17a, 17b, 17c, 17d to make it stable and fixed;
第四部分从各支管中加四个球阀18a、18b、18c、18d，通过罐体本身的排空阀20a、20b、20c、20d，分别进入氧气罐体21a、21b、21c、21d，控制进入各路试验容器氮气流量，再加装四个放空旁通球阀19a、19b、19c、19d，作为试验后的氮气放空及氧气置换阀使用，经实践后完成强度及严密性试验工作，符合规范要求，得到质检部门认可。The fourth part adds four ball valves 18a, 18b, 18c, 18d from each branch pipe, and enters the oxygen tank body 21a, 21b, 21c, 21d respectively through the emptying valve 20a, 20b, 20c, 20d of the tank body itself, and controls the entry Nitrogen flow rate of each test container, and four venting bypass ball valves 19a, 19b, 19c, 19d are added to be used as nitrogen venting and oxygen replacement valves after the test. After practice, the strength and tightness test work is completed, which meets the requirements of the specification , approved by the quality inspection department.
制氧设备中分馏塔多余氮气的回收系统的使用方法是：The method of using the recovery system for excess nitrogen in the fractionation tower in the oxygen plant is:
空分设备可以正常生产，具体步骤：The air separation plant can be produced normally, the specific steps are as follows:
1)、安装后的氮气管路吹扫：1), Nitrogen pipeline purging after installation:
关闭阀14、及各压力容器下部的排空阀20a、20b、20c、20d、关闭氧气通入充瓶阀门11，关闭分馏塔氮气放空阀3，关闭氧气进入氧压机进气阀5，打开以下各阀：氮气放空旁通阀6，进入氧压机的进气阀7，氧气放空阀12，及通往压力容器的阀15、各支管中四个球阀18a、18b、18c、18d，放空旁通球阀19a、19b、19c、19d，之后开氧压机10，通氮气进行吹扫，直至管道气体清洁，无杂质，用靶版测试合格为止。Close valve 14, and the emptying valve 20a, 20b, 20c, 20d of each pressure vessel bottom, close oxygen and feed bottle filling valve 11, close fractionation column nitrogen vent valve 3, close oxygen and enter oxygen compressor inlet valve 5, open The following valves: nitrogen venting bypass valve 6, intake valve 7 entering oxygen compressor, oxygen venting valve 12, valve 15 leading to pressure vessel, four ball valves 18a, 18b, 18c, 18d in each branch pipe, venting Bypass the ball valves 19a, 19b, 19c, 19d, then turn on the oxygen compressor 10, and purge with nitrogen until the gas in the pipeline is clean, free of impurities, and qualified by the target plate test.
2)、压力容器试验2), pressure vessel test
打开欲打压的压力容器排空阀20a、20b、20c、20d，，氧气放空阀12、阀6、7、15、支管中四个球阀18a、18b、18c、18d，关闭氮气放空阀3、氧气通入充瓶阀门11、阀14、放空旁通球阀19a、19b、19c、19d，之后开氧压机10通氮气进行压力容器试验，直至完成规定压力(按试验规程执行)。Open the pressure vessel vent valve 20a, 20b, 20c, 20d to be suppressed, the oxygen vent valve 12, valve 6, 7, 15, four ball valves 18a, 18b, 18c, 18d in the branch pipe, close the nitrogen vent valve 3, the oxygen vent valve Connect the bottle filling valve 11, valve 14, and venting bypass ball valves 19a, 19b, 19c, 19d, then turn on the oxygen compressor 10 and pass nitrogen to carry out the pressure vessel test until the specified pressure is completed (executed according to the test procedure).
3)、泄压置换3), pressure relief replacement
按要求达到试验压力并保压，得到质检部门认可后，完成试验工作，停止氧压机10、关闭阀6、7、15、18a、18b、18c、18d，打开氮气放空阀3、及阀14、19a、19b、19c、19d、20a、20b、20c、20d，排空罐体21a、21b、201、21d氮气，按正常程序进行即可。The test pressure is reached and maintained according to the requirements. After obtaining the approval of the quality inspection department, the test work is completed, the oxygen compressor 10 is stopped, the valves 6, 7, 15, 18a, 18b, 18c, and 18d are closed, and the nitrogen vent valve 3 and valves are opened. 14, 19a, 19b, 19c, 19d, 20a, 20b, 20c, 20d, empty the tank body 21a, 21b, 201, 21d nitrogen, and proceed according to the normal procedure.
本发明具有以下有益效果：The present invention has the following beneficial effects:
1、利用制氧设备中分馏塔多余氮气的回收系统及使用方法，来替代传统外购氮气瓶向压力容器充入氮气的试验方法，减少大量的资金浪费，经济效益和社会效益显著。1. Use the recovery system and use method of excess nitrogen in the fractionation tower in the oxygen production equipment to replace the traditional test method of filling nitrogen into the pressure vessel from the purchased nitrogen cylinder, reducing a lot of waste of funds, and the economic and social benefits are remarkable.
2、本项设计合理，投资少，可以循环使用，一劳永逸。2. The design of this item is reasonable, the investment is small, and it can be recycled once and for all.
附图说明Description of drawings
图1：本发明的制氧设备中分馏塔多余氮气的回收系统及使用方法的设计示意图。Fig. 1: the schematic diagram of the design of the recovery system and method of use of excess nitrogen in the fractionation tower in the oxygen plant of the present invention.
图中：1、空分设备分馏塔，2、设备原有氮气再生补充阀，3、原有氮气放空阀，4、原有分馏塔氧气出气阀，5、原有氧气进入氧压机进气阀，6、DN8016WCB管路氮气球阀，7、DN80 16CF8氧压机进氮气球阀，8、进氧压机管道过滤器DN80 16WCB，9、管道原有的过滤器，10、空分设备氧压机，11、原有氧气至充瓶阀门，12、原有氧气放空阀，13、连接三通，14、DN25 40WCB控制管路气体放空球阀，15、DN25 40WCB主管控制总氮气流量的球阀，16a、16b管路连接法兰，17a、17b、17c、17d管路支撑，18a、18b、18c、18d DN1540WCB控制进入氧气罐体氮气流量球阀，19a、19b、19c、19d DN15 40WCB试验后的氮气放空及氧气置换球阀，20a、20b、20c、20d罐体本身的排空阀，21a、21b、21c、21d氧气罐体。In the figure: 1. The fractionation tower of the air separation equipment, 2. The original nitrogen regeneration supplement valve of the equipment, 3. The original nitrogen vent valve, 4. The oxygen outlet valve of the original fractionation tower, 5. The original oxygen enters the intake air of the oxygen compressor Valve, 6. DN8016WCB pipeline nitrogen balloon valve, 7. DN80 16CF8 oxygen compressor inlet nitrogen balloon valve, 8. Oxygen inlet compressor pipeline filter DN80 16WCB, 9. Original pipeline filter, 10. Air separation equipment oxygen compressor , 11. The original oxygen to bottle filling valve, 12. The original oxygen vent valve, 13. The connection tee, 14. DN25 40WCB control pipeline gas venting ball valve, 15. The ball valve in charge of DN25 40WCB controlling the total nitrogen flow, 16a, 16b pipeline connection flange, 17a, 17b, 17c, 17d pipeline support, 18a, 18b, 18c, 18d DN1540WCB ball valve to control the nitrogen flow into the oxygen tank, 19a, 19b, 19c, 19d DN15 40WCB after the test nitrogen venting and Oxygen displacement ball valves, 20a, 20b, 20c, 20d emptying valves of the tank itself, 21a, 21b, 21c, 21d oxygen tanks.
具体实施方式Detailed ways
本发明是根据制氧设备自身的特点，将氮气放空管加以改造，利用原有的氧压机对管路进行局部改造，使之可以压缩氮气，作为压力容器检验时的试验介质的使用方法，即安全又经济。According to the characteristics of the oxygen-making equipment itself, the present invention reforms the nitrogen venting pipe, uses the original oxygen compressor to partially reform the pipeline so that it can compress nitrogen, and uses it as a test medium for pressure vessel inspection. , which is safe and economical.
所述的制氧设备中分馏塔多余氮气的回收系统及使用方法，其系统结构由四部分组成，第一部分从原有分馏塔1的氮气放空管，旁通连接一支管加球阀6控制氮气流量，氮气管路一直连接至氧压机室，原有的氮气再生补充阀2继续使用，原有氮气放空阀3用时可关闭，原有的分馏塔氧气出气阀4进入氧气主管道，原有的氧气进入氧压机进气阀5关闭，(空分行业一般都有多台氧压机，使用其中一台就可以了)。第二部分将氮气管连接在氧压机原有旁通进气管之前再加一球阀7控制进氧压机氮气的流量、加一管道过滤器8清除氮气管路系统杂质、再通过原有的过滤器9进入氧压机10，关闭氧气至充瓶阀门11，打开原有氧气放空阀12，利用氧气放空管作为氮气出口，第三部分在氧气通往大气放空管下部连接三通13，加装控制放空流量球阀14和进入主管控制总氮气流量的球阀15，之后用管路及法兰16a、16b连接各支管，分别加支撑17a、17b、17c、17d使之平稳固定，第四部分从各支管中加四个球阀18a、18b、18c、18d，通过罐体本身的排空阀20a、20b、20c、20d，分别进入氧气罐体21a、21b、21c、21d，控制进入各路试验容器氮气流量，再加装四个放空旁通球阀19a、19b、19c、19d，作为试验后的氮气放空及氧气置换阀使用，经实践后完成强度及严密性试验工作，符合规范要求，得到质检部门认可。The recovery system and method of using excess nitrogen in the fractionation tower in the oxygen production equipment, its system structure is composed of four parts, the first part is from the nitrogen vent pipe of the original fractionation tower 1, a bypass connects a pipe and adds a ball valve 6 to control nitrogen Flow rate, the nitrogen pipeline is always connected to the oxygen compressor room, the original nitrogen regeneration replenishment valve 2 continues to be used, the original nitrogen vent valve 3 can be closed when in use, and the original oxygen outlet valve 4 of the fractionation tower enters the main oxygen pipeline. The oxygen entering the oxygen compressor intake valve 5 is closed, (the air separation industry generally has multiple oxygen compressors, and one of them can be used). In the second part, connect the nitrogen pipe to the original bypass intake pipe of the oxygen compressor, add a ball valve 7 to control the flow of nitrogen into the oxygen compressor, add a pipeline filter 8 to remove impurities in the nitrogen pipeline system, and then pass through the original The filter 9 enters the oxygen compressor 10, closes the oxygen to the bottle filling valve 11, opens the original oxygen vent valve 12, uses the oxygen vent pipe as the nitrogen outlet, and the third part connects the tee 13 at the lower part of the oxygen vent pipe to the atmosphere , add a ball valve 14 to control the venting flow and a ball valve 15 that enters the main pipe to control the total nitrogen flow, then connect the branch pipes with pipelines and flanges 16a, 16b, add supports 17a, 17b, 17c, 17d respectively to make them stable and fixed, the fourth Partly add four ball valves 18a, 18b, 18c, 18d from each branch pipe, and enter the oxygen tank body 21a, 21b, 21c, 21d respectively through the emptying valve 20a, 20b, 20c, 20d of the tank body itself, and control the flow into each channel. Test the nitrogen flow rate of the container, and install four venting bypass ball valves 19a, 19b, 19c, 19d, which are used as nitrogen venting and oxygen replacement valves after the test. Approved by the quality inspection department.
具体设计：如附图利用分馏塔的氮气放空管，在其管路中开孔焊接旁通一镀锌管直径Φ89×4，作用防止管路中有锈等杂质，进入氧压机，造成不安全因素，使其管路高空架设，至氧压机室侧墙，下沿走地下埋地，至氧压机原有旁通进气管连接直径Φ89×4镀锌管，加球阀、管道过滤器组成第一部分，氮气进入氧压机后，经氧压机室外放空管下部用Φ25×3的无缝钢管组成第二部分，第三部分已经进入氧气罐区，严禁明火，故此所有管道连接全部采用厂外预制，现场法兰连接的方式，保证安全。第四部分利用压力容器自身的排空管路及阀门，连接Φ25×3的无缝钢管，加装两道球阀控制，所有的管道连接全部采用球阀控制，目的气体的密封性好，减少泄漏，保证试验质量。Specific design: As shown in the attached figure, use the nitrogen vent pipe of the fractionation tower to open a hole in the pipeline and weld a galvanized pipe with a diameter of Φ89×4 to bypass it, so as to prevent impurities such as rust in the pipeline from entering the oxygen compressor and causing damage Due to unsafe factors, the pipeline is erected at high altitude, to the side wall of the oxygen compressor room, and the lower edge is buried underground, and the original bypass intake pipe of the oxygen compressor is connected to a galvanized pipe with a diameter of Φ89×4, and a ball valve and a pipeline filter are added. The first part is made up of the oxygen compressor. After nitrogen enters the oxygen compressor, the second part is composed of Φ25×3 seamless steel pipe through the lower part of the outdoor vent pipe of the oxygen compressor. The third part has entered the oxygen tank area. Open flames are strictly prohibited, so all pipes are connected All are prefabricated outside the factory and flanged on site to ensure safety. The fourth part uses the emptying pipeline and valve of the pressure vessel itself to connect the Φ25×3 seamless steel pipe, and installs two ball valves for control. All pipeline connections are controlled by ball valves. Guarantee the quality of the test.
本发明设计的核心是：在保证安全使用的前提下，废物利用，节约资金。The core of the design of the present invention is: under the premise of ensuring safe use, waste is utilized and funds are saved.
工作步骤：空分设备可以正常生产Working steps: the air separation plant can be produced normally
1、安装后的氮气管路吹扫：1. Nitrogen pipeline purging after installation:
关闭阀14、及各压力容器下部的排空阀20a、20b、20c、20d、关闭氧气通入充瓶阀门11，关闭分馏塔氮气放空阀3，关闭氧气进入氧压机进气阀5，打开以下各阀：氮气放空旁通阀6，进入氧压机的进气阀7，氧气放空阀12，及通往压力容器的阀15、各支管中四个球阀18a、18b、18c、18d，放空旁通球阀19a、19b、19c、19d，之后开氧压机10，通氮气进行吹扫，直至管道气体清洁，无杂质，用靶版测试合格为止。Close valve 14, and the emptying valve 20a, 20b, 20c, 20d of each pressure vessel bottom, close oxygen and feed bottle filling valve 11, close fractionation column nitrogen vent valve 3, close oxygen and enter oxygen compressor inlet valve 5, open The following valves: nitrogen venting bypass valve 6, intake valve 7 entering oxygen compressor, oxygen venting valve 12, valve 15 leading to pressure vessel, four ball valves 18a, 18b, 18c, 18d in each branch pipe, venting Bypass the ball valves 19a, 19b, 19c, 19d, then turn on the oxygen compressor 10, and purge with nitrogen until the gas in the pipeline is clean, free of impurities, and qualified by the target plate test.
2、压力容器试验2. Pressure vessel test
打开欲打压的压力容器排空阀20a、20b、20c、20d，，氧气放空阀12、阀6、7、15、支管中四个球阀18a、18b、18c、18d，关闭氮气放空阀3、氧气通入充瓶阀门11、阀14、放空旁通球阀19a、19b、19c、19d，之后开氧压机10通氮气进行压力容器试验，直至完成规定压力(按试验规程执行)。Open the pressure vessel vent valve 20a, 20b, 20c, 20d to be suppressed, the oxygen vent valve 12, valve 6, 7, 15, four ball valves 18a, 18b, 18c, 18d in the branch pipe, close the nitrogen vent valve 3, the oxygen vent valve Connect the bottle filling valve 11, valve 14, and venting bypass ball valves 19a, 19b, 19c, 19d, then turn on the oxygen compressor 10 and pass nitrogen to carry out the pressure vessel test until the specified pressure is completed (executed according to the test procedure).
3、泄压置换3. Pressure relief replacement
按要求达到试验压力并保压，得到质检部门认可后，完成试验工作，停止氧压机10、关闭阀6、7、15、18a、18b、18c、18d、，打开氮气放空阀3、及阀14、19a、19b、19c、19d、20a、20b、20c、20d，排空罐体21a、21b、201、21d氮气，按正常程序进行即可。Reach the test pressure and maintain the pressure as required, and after obtaining the approval of the quality inspection department, complete the test work, stop the oxygen compressor 10, close the valves 6, 7, 15, 18a, 18b, 18c, 18d, open the nitrogen vent valve 3, and Valves 14, 19a, 19b, 19c, 19d, 20a, 20b, 20c, 20d, emptying tanks 21a, 21b, 201, 21d nitrogen, can be carried out according to normal procedures.
上述的实施方式并非是唯一的，本发明的管道连接还可以有另外的实施方式，但均应落入本发明的保护范围内。The above-mentioned implementation is not the only one, and the pipeline connection of the present invention can also have other implementations, but all of them should fall within the protection scope of the present invention.
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