阅读说明：本技术 一种大型油罐安全环保一体化防护系统及防护方法 (A kind of large oil tank safety and environmental protection integrative protection system and means of defence ) 是由 吴明军 杨忠平 王占生 郝莹莹 喻涛 李春晓 任强 李民康 伍太 于 2019-09-09 设计创作，主要内容包括：本发明公开了一种大型油罐安全环保一体化防护系统及防护方法,本发明通过对石油储罐油气空间内的混合气体进行远程采样分析,检测其氧气浓度、可燃气体浓度和非甲烷总烃含量,并能过对检测结果与预设阈值进行对比判断,自动对油罐进行安全防护和VOCs排放防护,而且在监测出可燃气体浓度和氧气浓度达到设定安全阈值之后,自动停止防护并进行下一采样终端的气体检测,从而避免了对石油储罐油气空间内油气的连续抽取,尽可能的保证油罐内的气相平衡,减少油气的挥发损耗,降低油罐内VOCs的无组织排放,有利于对环境的保护。(The invention discloses a kind of large oil tank safety and environmental protection integrative protection system and means of defences, the present invention is by carrying out long-range sampling analysis to the mixed gas in petroleum storage tank oil-gas space, detect its oxygen concentration, combustable gas concentration and non-methane total hydrocarbons content, and judgement can be compared to testing result and preset threshold excessively, automatically security protection and VOCs discharge protection are carried out to oil tank, and after detecting combustable gas concentration and oxygen concentration reach setting secure threshold, it is automatically stopped protection and carries out the gas detection of next sampling terminal, so as to avoid the continuous drawing to oil gas in petroleum storage tank oil-gas space, guarantee the gas-liquid equilibrium in oil tank as far as possible, reduce the volatilizing loss of oil gas, reduce the uncontrollable discharge of VOCs in oil tank, be conducive to the protection to environment.)

1. a kind of large oil tank safety and environmental protection integrative protection system, including multiple multi-purpose terminals (15), sub-control module (11), For nitrogen device (2) and oil gas treating device (3), the multiple multi-purpose terminal (15) is arranged at the oil of petroleum storage tank (14) In headroom, it is characterised in that: the corresponding sub-control module (11) of each petroleum storage tank (14), each sub-control module (11) include It samples valve group (117), the first solenoid valve (111), second solenoid valve (112), sampling pump (116), pretreatment (115) and analyzes Instrument (114), the sampling valve group (117) are made of multiple sampling solenoid valves (1171), the multiple multi-purpose terminal (15) point It is not connected one to one by the import of independent multi-purpose pipeline (16) and multiple samplings solenoid valve (1171), the multiple sampling The outlet of solenoid valve (1171) is interconnected and by second solenoid valve (112) and sampling pump (116) inlet communication, the sampling Pump (116) exports preprocessed (115), analyzer (114) is connected to pumping general pipeline (13), the pumping general pipeline (13) and oil gas Processing unit (3) connection, it is the multiple sampling solenoid valve (1171) outlet be interconnected and by the first solenoid valve (111) with Nitrogen general pipeline (12) connection is infused, the note nitrogen general pipeline (12) is connected to for nitrogen device (2).

2. large oil tank safety and environmental protection integrative protection system according to claim 1, it is characterised in that: multiple sub-control moulds Block (11) is arranged in protective device (1), and the multiple sub-control module (11) and the petroleum storage tank (14) one protected are a pair of It answers, the note nitrogen general pipeline (12) and pumping general pipeline (13) setting are in protective device (1).

3. large oil tank safety and environmental protection integrative protection system according to claim 1, it is characterised in that: the multipurpose Terminal (15) is divided into multiple protection terminals (7) and multiple sampling terminals (8), and the multiple protection terminal (7) is arranged in petroleum In the oil-gas space of storage tank (14), and by protecting pipeline (4) to be connected to the first solenoid valve (111), first solenoid valve (111) it is connected to note nitrogen general pipeline (12)；The multiple sampling terminal (8) is arranged in the oil-gas space of petroleum storage tank (14), and Corresponding sampling solenoid valve (1171) import, the multiple sampling electromagnetism are respectively connected to by mutually independent sample lines (6) The outlet of valve (1171) is interconnected, and passes through second solenoid valve (112) and sampling pump (116) inlet communication.

4. large oil tank safety and environmental protection integrative protection system according to claim 3, it is characterised in that: in the petroleum It is provided in the oil-gas space of storage tank (14) endless tube (5), the multiple protection terminal (7) is connected to endless tube (5) respectively, the ring Pipe (5) is connected to protection pipeline (4).

5. large oil tank safety and environmental protection integrative protection system according to claim 4, it is characterised in that: the sub-control mould Block (11) further includes third solenoid valve (113), the endless tube (5) by protection pipeline (4) respectively with the first solenoid valve (111) and Third solenoid valve (113) connection, the third solenoid valve (113) are connected to pumping general pipeline (13).

6. large oil tank safety and environmental protection integrative protection system according to claim 5, it is characterised in that: the multiple to adopt The outlet of sample solenoid valve (1171) is interconnected and respectively with second solenoid valve (112) and sampling pump (116) inlet communication, described Second solenoid valve (112) is directly connected to pumping general pipeline (13), and the sampling pump (116) exports preprocessed (115), analyzer (114) it is connected to pumping general pipeline (13).

7. the means of defence of large oil tank safety and environmental protection integrative protection system according to claim 1 or 2, feature exist In: starting sampling pump successively opens sampling solenoid valve and second solenoid valve, and the mixed gas in petroleum storage tank is through multipurpose end End, multi-purpose pipeline, sampling valve group enter sampling pump, and analyzer, detection are entered after the preprocessed device of gas of sampling pump output Oxygen concentration and combustable gas concentration in gas out；

After the combustable gas concentration and oxygen concentration that detect a certain multi-purpose terminal reach setting danger early warning threshold value, from It is dynamic to open the first solenoid valve and all sampling solenoid valves, and second solenoid valve and sampling pump is automatically closed, for the nitrogen of nitrogen device Through note nitrogen general pipeline, the first solenoid valve, sampling valve group, multi-purpose pipeline and multi-purpose terminal, infused into the oil-gas space of petroleum storage tank Enter nitrogen, reduces oxygen concentration and combustable gas concentration in oil-gas space；

After lasting injection nitrogen to setting time, sampling pump is restarted, opens sampling solenoid valve and second solenoid valve, monitoring The first solenoid valve is automatically closed if reaching setting secure threshold in combustable gas concentration and oxygen concentration out, stops to petroleum Nitrogen is injected in the oil-gas space of storage tank, and carries out the gas detection of next multi-purpose terminal automatically.

8. the means of defence of large oil tank safety and environmental protection integrative protection system according to claim 3 or 4, feature exist In: starting sampling pump successively opens sampling solenoid valve, the sampled terminal of mixed gas, sample lines, sampling in petroleum storage tank Valve group enters sampling pump, enters analyzer after the preprocessed device of gas of sampling pump output, detects that the oxygen in gas is dense Degree and combustable gas concentration；

After the combustable gas concentration and oxygen concentration that detect a certain sampling terminal reach setting danger early warning threshold value, automatically The first solenoid valve is opened, through note nitrogen general pipeline, the first solenoid valve, protection pipeline, endless tube and protects terminal for the nitrogen of nitrogen device, to Nitrogen is injected in the oil-gas space of petroleum storage tank, reduces oxygen concentration and combustable gas concentration in oil-gas space；

After detecting combustable gas concentration and oxygen concentration reaches setting secure threshold, the first solenoid valve is automatically closed, stops Nitrogen is only injected into the oil-gas space of petroleum storage tank, and carries out the gas detection of next sampling terminal automatically.

9. the means of defence of large oil tank safety and environmental protection integrative protection system according to claim 5 or 6, feature exist In: starting sampling pump successively opens sampling solenoid valve, the sampled terminal of mixed gas, sample lines, sampling in petroleum storage tank Valve group enters sampling pump, enters analyzer after the preprocessed device of gas of sampling pump output, detects that the oxygen in gas is dense Degree and combustable gas concentration；

After the combustable gas concentration and oxygen concentration that detect a certain sampling terminal reach setting danger early warning threshold value, automatically Open the first solenoid valve, second solenoid valve and all sampling solenoid valves, for nitrogen device nitrogen through infuse nitrogen general pipeline, the first electromagnetism Valve, protection pipeline, endless tube and protection terminal, nitrogen are injected into the oil-gas space of petroleum storage tank, while petroleum storage tank oil gas is empty Between gas through multiple sampling terminals, sample lines, sampling valve group and second solenoid valve enter pumping general pipeline, flow to oil vapor treatment Device, the gas after oil gas treating device is recycled return to petroleum storage tank oil-gas space through pressurization again, form closed cycle；

After detecting combustable gas concentration and oxygen concentration reaches setting secure threshold, the first solenoid valve, the is automatically closed Two solenoid valves and all sampling solenoid valves stop injecting nitrogen into the oil-gas space of petroleum storage tank and extract oil gas, and from The dynamic gas detection for carrying out next sampling terminal.

10. the means of defence of large oil tank safety and environmental protection integrative protection system according to claim 5 or 6, feature Be: starting sampling pump successively opens each sampling solenoid valve, detects the gas concentration data of each sampling terminal；

After the non-methane total hydrocarbons content for detecting a certain sampling terminal reaches setting threshold value of warning, third electromagnetism is automatically opened Valve, mixed gas in petroleum storage tank by all protection terminals, endless tube, pipeline, third solenoid valve is protected to enter pumping general pipeline, Oil gas treating device is flowed to be recycled；

When detect non-methane total hydrocarbons content reach allow emission early-warning threshold value after, be automatically closed third solenoid valve, stop taking out Oil gas is taken, and carries out the gas detection of next sampling terminal automatically.

Technical field

The invention belongs to technical field of petrochemical industry, in particular to a kind of large oil tank safety and environmental protection integrative protection system And means of defence.

Background technique

Since petroleum storage tank can not be completely filled up oil product, there is certain gas compartment, the gaseous mixture in the space Body mainly by oil product generate oil vapour and air, after mixed gas reaches explosible limit concentration, oil tank once occur electrostatic, Phenomena such as potential difference, excessively high open fire or temperature, fire explosion accident.In recent years, all kinds of petroleum storage tank fire incidents go out Existing high-incidence trend, causes great casualties and property loss, while also creating the environmental pollution of large area.

Currently, using active inerting skill on oil tank to realize early monitoring and the prevention to tank fire accident sign Art carries out protection and has become research emphasis.

Summary of the invention

It is an object of the invention to: in view of the above problems, petroleum storage tank can be carried out effectively to lead by providing one kind On the basis of dynamic protection, the large oil tank safety and environmental protection integrative protection that oil gas volatilization is lost and pipeline is simpler can reduce System and means of defence.

The technical solution of the technology of the present invention is achieved in that a kind of large oil tank safety and environmental protection integrative protection system, Including multiple multi-purpose terminals, sub-control module, for nitrogen device and oil gas treating device, the multiple multi-purpose terminal is respectively provided with In the oil-gas space of petroleum storage tank, it is characterised in that: the corresponding sub-control module of each petroleum storage tank, each sub-control module packet Sampling valve group, the first solenoid valve, second solenoid valve, sampling pump, pretreatment and analyzer, the sampling valve group is included to be adopted by multiple Sample solenoid valve block is at the multiple multi-purpose terminal passes through the import one of independent multi-purpose pipeline and multiple sampling solenoid valves respectively One is correspondingly connected with, and the outlet of the multiple sampling solenoid valve is interconnected and passes through second solenoid valve and sampling pump inlet communication, The sampling pump discharge is preprocessed, analyzer is connected to pumping general pipeline, and the pumping general pipeline is connected to oil gas treating device, institute It states multiple outlets for sampling solenoid valves to be interconnected and be connected to by the first solenoid valve with note nitrogen general pipeline, the note nitrogen general pipeline and confession The connection of nitrogen device.

Large oil tank safety and environmental protection integrative protection system of the present invention, multiple sub-control modules are arranged at protection In device, the multiple sub-control module is corresponded with the petroleum storage tank protected, the note nitrogen general pipeline and pumping general pipeline setting In protective device.

Further, base of the large oil tank safety and environmental protection integrative protection system of the present invention in said structure design On plinth, the multi-purpose terminal is extended to multiple protection terminals and multiple sampling terminals, and the multiple protection terminal is set It sets in the oil-gas space of petroleum storage tank, and by protecting pipeline to be connected to the first solenoid valve, first solenoid valve and note nitrogen General pipeline connection；The multiple sampling terminal is arranged in the oil-gas space of petroleum storage tank, and passes through mutually independent sample lines It is respectively connected to corresponding sampling solenoid valve import, the outlet of the multiple sampling solenoid valve is interconnected, and passes through the second electromagnetism Valve and sampling pump inlet communication.

Large oil tank safety and environmental protection integrative protection system of the present invention, in the oil-gas space of the petroleum storage tank It is inside provided with endless tube, the multiple protection terminal is connected to endless tube respectively, the endless tube and protection pipeline connection.

Further, the sub-control module further includes third solenoid valve, and the endless tube is by protection pipeline respectively with the One solenoid valve is connected to third solenoid valve, and the third solenoid valve is connected to pumping general pipeline.

Large oil tank safety and environmental protection integrative protection system of the present invention, the outlet of the multiple sampling solenoid valve Be interconnected and respectively with second solenoid valve and sampling pump inlet communication, the second solenoid valve directly with pumping general pipeline be connected to, The sampling pump discharge is preprocessed, analyzer is connected to pumping general pipeline.

The means of defence of large oil tank safety and environmental protection integrative protection system of the present invention starts sampling pump, according to Secondary unlatching samples solenoid valve and second solenoid valve, and the mixed gas in petroleum storage tank is through multi-purpose terminal, multi-purpose pipeline, sampling valve Group enters sampling pump, enters analyzer after the preprocessed device of gas of sampling pump output, detects the oxygen concentration in gas And combustable gas concentration；

When the combustable gas concentration and oxygen concentration that detect a certain multi-purpose terminal reach setting danger early warning threshold value it Afterwards, the first solenoid valve and all sampling solenoid valves are automatically opened, and second solenoid valve and sampling pump is automatically closed, for nitrogen device Nitrogen is through note nitrogen general pipeline, the first solenoid valve, sampling valve group, multi-purpose pipeline and multi-purpose terminal, to the oil-gas space of petroleum storage tank Interior injection nitrogen reduces oxygen concentration and combustable gas concentration in oil-gas space；

After lasting injection nitrogen to setting time, sampling pump is restarted, opens sampling solenoid valve and second solenoid valve, Detect combustable gas concentration and oxygen concentration, if reaching setting secure threshold, the first solenoid valve be automatically closed, stop to Nitrogen is injected in the oil-gas space of petroleum storage tank, and carries out the gas detection of next multi-purpose terminal automatically.

The means of defence of large oil tank safety and environmental protection integrative protection system of the present invention starts sampling pump, according to Secondary unlatching samples solenoid valve, and the sampled terminal of mixed gas, sample lines, sampling valve group in petroleum storage tank enter sampling pump, Enter analyzer after the preprocessed device of gas of sampling pump output, detects that oxygen concentration in gas and fuel gas are dense Degree；

After the combustable gas concentration and oxygen concentration that detect a certain sampling terminal reach setting danger early warning threshold value, The first solenoid valve is automatically opened, it is whole through note nitrogen general pipeline, the first solenoid valve, protection pipeline, endless tube and protection for the nitrogen of nitrogen device Nitrogen is injected at end into the oil-gas space of petroleum storage tank, reduces oxygen concentration and combustable gas concentration in oil-gas space；

After detecting combustable gas concentration and oxygen concentration reaches setting secure threshold, the first electromagnetism is automatically closed Valve stops injecting nitrogen into the oil-gas space of petroleum storage tank, and carries out the gas detection of next sampling terminal automatically.

The means of defence of large oil tank safety and environmental protection integrative protection system of the present invention starts sampling pump, according to Secondary unlatching samples solenoid valve, and the sampled terminal of mixed gas, sample lines, sampling valve group in petroleum storage tank enter sampling pump, Enter analyzer after the preprocessed device of gas of sampling pump output, detects that oxygen concentration in gas and fuel gas are dense Degree；

After the combustable gas concentration and oxygen concentration that detect a certain sampling terminal reach setting danger early warning threshold value, The first solenoid valve, second solenoid valve and all sampling solenoid valves are automatically opened, is infused nitrogen general pipeline, the first electricity for the nitrogen of nitrogen device Magnet valve, protection pipeline, endless tube and protection terminal, nitrogen, while petroleum storage tank oil gas are injected into the oil-gas space of petroleum storage tank The gas in space enters pumping general pipeline through multiple sampling terminals, sample lines, sampling valve group and second solenoid valve, flows at oil gas Device is managed, the gas after oil gas treating device is recycled returns to petroleum storage tank oil-gas space through pressurization again, forms enclosed and follows Ring；

After detecting combustable gas concentration and oxygen concentration reaches setting secure threshold, the first electromagnetism is automatically closed Valve, second solenoid valve and all sampling solenoid valves stop injecting nitrogen into the oil-gas space of petroleum storage tank and extract oil gas, And the gas detection of next sampling terminal is carried out automatically.

The means of defence of large oil tank safety and environmental protection integrative protection system of the present invention starts sampling pump, according to It is secondary to open each sampling solenoid valve, detect the gas concentration data of each sampling terminal；

After the non-methane total hydrocarbons content for detecting a certain sampling terminal reaches setting threshold value of warning, third is automatically opened Solenoid valve, mixed gas in petroleum storage tank by all protection terminals, endless tube, pipeline, third solenoid valve is protected to enter pumping General pipeline flows to oil gas treating device and is recycled；

When detect non-methane total hydrocarbons content reach allow emission early-warning threshold value after, third solenoid valve is automatically closed, stops Oil gas is only extracted, and carries out the gas detection of next sampling terminal automatically.

It is dense to detect its oxygen by carrying out long-range sampling analysis to the mixed gas in petroleum storage tank oil-gas space by the present invention Degree, combustable gas concentration and non-methane total hydrocarbons content, and by comparing judgement to testing result and preset threshold, it is automatic right Oil tank carries out security protection and VOCs discharge protection, provides a kind of reliable large oil tank safety and environmental protection integrative protection system And method.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1.

Fig. 2 is the structural schematic diagram of the embodiment of the present invention 2.

Fig. 3 is the structural schematic diagram of the embodiment of the present invention 3.

Fig. 4 is intelligent protection action flow chart of the invention.

Fig. 5 is intelligence recycling action flow chart of the invention.

Marked in the figure: 1 is protective device, 2 is, for nitrogen device, 3 are oil gas treating device, and 4 be protection pipeline, and 5 be endless tube, 6 be sample lines, and 7 be protection terminal, and 8 be to sample terminal, and 11 be sub-control module, and 12 be note nitrogen general pipeline, and 13 be to be evacuated general pipeline, 14 It is multi-purpose terminal for petroleum storage tank, 15,16 is are mostly used pipeline, and 111 be the first solenoid valve, and 112 be second solenoid valve, and 113 are Third solenoid valve, 114 be analyzer, and 115 be pretreatment, and 116 be sampling pump, and 117 be sampling valve group, and 1171 be sampling electromagnetism Valve.

Specific embodiment

With reference to the accompanying drawing, the present invention is described in detail.

In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The technology of the present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain this hair It is bright, it is not intended to limit the present invention.