CN106040447B - A kind of air protection method for centrifuge inner cavity - Google Patents
A kind of air protection method for centrifuge inner cavity Download PDFInfo
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- CN106040447B CN106040447B CN201610628719.9A CN201610628719A CN106040447B CN 106040447 B CN106040447 B CN 106040447B CN 201610628719 A CN201610628719 A CN 201610628719A CN 106040447 B CN106040447 B CN 106040447B
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- centrifuge
- inner cavity
- oxygen content
- gas
- content concentration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
Abstract
The invention discloses a kind of air protection method for centrifuge inner cavity that multiple monitoring can be carried out to the protective gas for being passed through centrifuge inner cavity, step is：Gas displacement is carried out to the inner cavity of centrifuge using protective gas by convection, to ensure that gas is down to anti-explosion safety scope in centrifuge inner cavity；In centrifuge dynamic running process; by convection protective gas is supplemented into the inner cavity of centrifuge; and by the detection of the oxygen content concentration of gas at thief hatch, to the flow of protective gas and the control of time, to the multiple monitorings means such as monitoring of centrifuge inner cavity air pressure; it obtains the real-time working situation of centrifuge exactly, and corresponding mode is taken to be passed through protective gas into centrifuge inner cavity；When centrifuge chamber pressure exception, start workshop forced ventilation, ensure the oxygen content concentration in workshop within safe range.The air protection method of the centrifuge inner cavity is mainly used for safeguard protection of the centrifuge in explosion-proof occasion.
Description
Technical field
The present invention relates to it is a kind of using the protective gas such as nitrogen to require the confined spaces such as explosion-proof centrifuge inner cavity into
The method of row protection.
Background technology
At present, a kind of air protection method for being traditionally used for centrifuge inner cavity, concretely comprises the following steps：Before centrifuge startup
Gas displacement is carried out using nitrogen, and passes through the time to being passed through nitrogen and flow control, to ensure the oxygen in centrifuge inner cavity
Content concn is down within the scope of anti-explosion safety；In the dynamic running process of centrifuge, nitrogen is constantly supplemented, and is passed through pair
The control of nitrogen flow is passed through, ensures the oxygen content concentration (tool of the anti-explosion safety scope of oxygen content concentration in centrifuge inner cavity
Body numerical value is depending on specific medium) maintain anti-explosion safety within the scope of.In actual use, it is each when centrifuge
Parts are under serviceable condition, and above-mentioned traditional air protection method is also reliable, usually not what problem.However,
Many institute's weeks and, the vibrations of itself and running environment are more severe when being run due to centrifuge, centrifuge long-play it
Afterwards, transmission parts, sealing element etc. all can slowly fail, and due to replacing trouble etc., cannot often replace in time, so as to
Result in centrifuge band " disease " work.At this moment, due to centrifuge is there are gas leakage etc., original this air protection method
Reliability is greatly lowered, it is impossible to which centrifuge inner cavity is protected well so that there are serious safety is hidden for centrifuge
Suffer from.In addition, when centrifuge runs into abnormal conditions, the operation of centrifuge is often interrupted by force, causes material because not obtaining
It timely separates and wastes.
The content of the invention
The technical problems to be solved by the invention are：There is provided it is a kind of can be passed through centrifuge inner cavity protective gas carry out
Multiple monitoring, to ensure that oxygen content concentration is in the gas for centrifuge inner cavity in the range of anti-explosion safety in centrifuge inner cavity
Guard method.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of gas for centrifuge inner cavity is protected
Maintaining method, step are：
1) before centrifuge startup, gas displacement is carried out to centrifuge inner cavity using protective gas by convection：
In replacement process, the oxygen content that detection is opened at the thief hatch of centrifuge inner cavity top in gas first is dense
Degree, when the oxygen content concentration at this is down to anti-explosion safety scope, then the oxygen content concentration of centrifuge inner cavity is down to anti-explosion safety
Scope；
When the air pressure in the failure of oxygen content Concentration Testing but centrifuge inner cavity is normal, then by being controlled to flow and time
System, to ensure that gas is down to anti-explosion safety scope in centrifuge inner cavity；
2) in centrifuge dynamic running process, protective gas is supplemented into the inner cavity of centrifuge by convection：
When oxygen content Concentration Testing is normal, then determine to mend by detecting the oxygen content concentration of gas at the thief hatch
Mode is filled, detailed process is：When the oxygen content concentration of gas is under the upper limit value of anti-explosion safety scope at thief hatch,
Then protective gas is passed through into the inner cavity of centrifuge by the way of small flow is continued；The oxygen content concentration of gas at thief hatch
During the upper limit value of >=anti-explosion safety scope, then：Protective gas is supplemented into centrifuge inner cavity in a manner of big flow, until sampling
At mouthful until lower limiting value of the oxygen content concentration of gas less than anti-explosion safety scope, then, continue in a manner of persistently small flow
Protective gas is passed through into centrifuge inner cavity；
When oxygen content Concentration Testing fails and flow detection is normal, then use lasting small flow, be spaced big flow
Mode is passed through protective gas into centrifuge inner cavity；
When oxygen content Concentration Testing and flow detection fail simultaneously, then using lasting big flow mode into centrifuge
Protective gas is supplemented in chamber, until end of run；
When centrifuge chamber pressure exception, start workshop forced ventilation, ensure the oxygen content concentration in workshop in safe model
Within enclosing.
As a preferred embodiment, in a kind of air protection method for centrifuge inner cavity, described is big
Flow refers to per hour>5 cubic metres, the small flow refers to per hour≤5 cubic metre.
As a preferred embodiment, in a kind of air protection method for centrifuge inner cavity, it is described from
Scheming chamber pressure refers to that the air pressure of centrifuge inner cavity is subtracted after the ambient pressure in workshop residing for centrifuge less than 5 millis extremely
Bar.
As a preferred embodiment, in a kind of air protection method for centrifuge inner cavity, to centrifugation
When machine inner cavity carries out gas displacement, protective gas is passed through into centrifuge inner cavity by the way of lasting big flow.
As a preferred embodiment, in a kind of air protection method for centrifuge inner cavity, when what is be passed through
When protective gas is more than 3 times of centrifuge cavity volume, the gas displacement process of centrifuge inner cavity terminates.
As a preferred embodiment, in a kind of air protection method for centrifuge inner cavity, the guarantor
It is nitrogen or other inert gases to protect gas.
The beneficial effects of the invention are as follows：The present invention passes through to the detecting of the oxygen content concentration of gas at the thief hatch, right
The multiple monitorings means such as the flow and time control of protective gas and the monitoring to the air pressure of centrifuge inner cavity, to obtain exactly
The real-time working situation of centrifuge is taken, and corresponding mode is taken to be passed through protective gas into centrifuge inner cavity so that centrifuge
Reliability be significantly enhanced, and can in the state of centrifuge safe operation emergency processing abnormal conditions, make centrifuge
Operation terminates to feed separation, efficiently avoids the waste of material.
Description of the drawings
Fig. 1 is the workflow schematic diagram of air protection method of the present invention.
Fig. 2 be and the corresponding centrifuge of each work step shown in FIG. 1 inside oxygen concentration content schematic diagram.
Specific embodiment
1 and Fig. 2 below in conjunction with the accompanying drawings is used for nitrogen as one kind of the present invention is described in detail exemplified by protective gas
The specific embodiment of the air protection method of centrifuge inner cavity.
Ginseng is seen figure 1 and figure 2, the air protection method of the present invention for centrifuge inner cavity, specific steps
For：
1) before centrifuge startup, gas displacement is carried out using nitrogen and by convection to centrifuge inner cavity, specifically
Process is：Using 20 cubic metres or more per hour of flows nitrogen is opened inwards into from the bottom of centrifuge inner cavity, and from centrifuge
The top of inner cavity is outwards vented, and detects gas at thief hatch (being generally connected at the outside exhaust of centrifuge inner cavity top) in real time
Oxygen content concentration in body, the oxygen content concentration at this be down to anti-explosion safety scope (for 3~5% in the present embodiment, oxygen content
The concrete numerical value of the anti-explosion safety scope of concentration is depending on specific medium) when, the oxygen content concentration of centrifuge inner cavity is down to anti-
In quick-fried safe range；(workshop condition gas is typically larger than when the air pressure in the failure of oxygen content Concentration Testing but centrifuge inner cavity is normal
5 millibars of pressure is i.e. more than hundred pas) when, then by flow and time control, to ensure that gas is down to explosion-proof peace in centrifuge inner cavity
Gamut, when the nitrogen being passed through is more than 3 times of centrifuge cavity volume, the gas of centrifuge inner cavity is down to anti-explosion safety model
It encloses, replacement process terminates；
2) in centrifuge dynamic running process, mended by convection from bowl bottom into centrifuge inner cavity
Inflated with nitrogen concretely comprises the following steps：
When oxygen content Concentration Testing is normal, then determine to mend by detecting the oxygen content concentration of gas at the thief hatch
Mode is filled, detailed process is：At thief hatch the oxygen content concentration of gas be in anti-explosion safety scope upper limit value (5%) it
When lower, then nitrogen is passed through into centrifuge inner cavity with 5 cubic metres per hour of flow；The oxygen content concentration of gas at thief hatch
During upper limit value (5%) of >=anti-explosion safety scope, then nitrogen is supplemented into centrifuge inner cavity with 20 cubic metres per hour of flow,
At the thief hatch until lower limiting value (3%) of the oxygen content concentration of gas less than anti-explosion safety scope, then, continue with every small
When 5 cubic metres of flow be passed through nitrogen into centrifuge inner cavity；
When oxygen content Concentration Testing failure and flow detection it is normal when, then with 5 cubic metres of flow per hour, interval with
The flow of 20 cubic metres or more per hour (concrete numerical value and depending on actual conditions) is passed through nitrogen into centrifuge inner cavity；
When oxygen content Concentration Testing and flow detection fail simultaneously, then with 20 cubic metres or more (concrete numerical values per hour
And depending on actual conditions) flow nitrogen is supplemented into centrifuge inner cavity, until centrifuge end of run；
When centrifuge chamber pressure extremely be centrifuge inner cavity air pressure subtract workshop residing for centrifuge ambient pressure it
Afterwards less than 5 millibars, start workshop forced ventilation, ensure the oxygen content concentration in workshop safe range (be usually 19.5% to
21%) within.
Certainly, in practical application, also periodically carrying out the detection of oxygen content concentration to the working environment residing for centrifuge, one
When denier finds that the oxygen content concentration in ambient enviroment is less than 20%, so that it may start forced ventilation, effectively ensure that operating personnel's
Personal safety.
In conclusion only presently preferred embodiments of the present invention, be not used for limiting the scope that the present invention is implemented, it is all according to
The equivalent changes and modifications that shape, construction, feature and spirit described in scope of the invention as claimed are made should all be included in this
In the right of invention.
Claims (6)
1. a kind of air protection method for centrifuge inner cavity, step are：
1) before centrifuge startup, gas displacement is carried out to the inner cavity of centrifuge using protective gas by convection：
In replacement process, detection first is opened at the thief hatch of centrifuge inner cavity top the oxygen content concentration in gas, when
When oxygen content concentration at this is down to anti-explosion safety scope, then the oxygen content concentration of centrifuge inner cavity is down to anti-explosion safety scope；
When the air pressure in the failure of oxygen content Concentration Testing but centrifuge inner cavity is normal, then by the control to flow and time,
To ensure that gas is down to anti-explosion safety scope in centrifuge inner cavity；
2) in centrifuge dynamic running process, protective gas is supplemented into the inner cavity of centrifuge by convection：
When oxygen content Concentration Testing is normal, then supplement side is determined by detecting the oxygen content concentration of gas at the thief hatch
Formula, detailed process are：When the oxygen content concentration of gas is under the upper limit value of anti-explosion safety scope at thief hatch, then adopt
With the mode of persistently small flow protective gas is passed through into the inner cavity of centrifuge；The oxygen content concentration of gas >=anti-at thief hatch
During the upper limit value of quick-fried safe range, then：Protective gas is supplemented into centrifuge inner cavity in a manner of big flow, until at thief hatch
The oxygen content concentration of gas less than anti-explosion safety scope lower limiting value until, then, continue in a manner of persistently small flow to from
Scheming is passed through protective gas in inner cavity；
When oxygen content Concentration Testing fails and flow detection is normal, then by the way of lasting small flow, interval big flow
Protective gas is passed through into centrifuge inner cavity；
When oxygen content Concentration Testing and flow detection fail simultaneously, then using lasting big flow mode into centrifuge inner cavity
Protective gas is supplemented, until end of run；
When centrifuge chamber pressure exception, start workshop forced ventilation, ensure the oxygen content concentration in workshop safe range it
It is interior.
2. the air protection method of centrifuge inner cavity is used for as described in claim 1, it is characterised in that：The big flow is
Refer to per hour>5 cubic metres, the small flow refers to per hour≤5 cubic metre.
3. the air protection method of centrifuge inner cavity is used for as described in claim 1, it is characterised in that：In the centrifuge
Cavity pressure refers to that the air pressure of centrifuge inner cavity is subtracted after the ambient pressure in workshop residing for centrifuge less than 5 millibars extremely.
4. the air protection method of centrifuge inner cavity is used for as described in claim 1, it is characterised in that：To centrifuge inner cavity
When carrying out gas displacement, protective gas is passed through into centrifuge inner cavity by the way of lasting big flow.
5. the air protection method of centrifuge inner cavity is used for as claimed in claim 4, it is characterised in that：When oxygen content concentration is examined
When air pressure in dendrometry effect but centrifuge inner cavity is normal, when the protective gas being passed through is more than 3 times of centrifuge cavity volume,
The gas displacement process of centrifuge inner cavity terminates.
6. the air protection method for centrifuge inner cavity as described in one of claim 1 to 5, it is characterised in that：Described
Protective gas is nitrogen or other inert gases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610628719.9A CN106040447B (en) | 2016-08-04 | 2016-08-04 | A kind of air protection method for centrifuge inner cavity |
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| CN201610628719.9A CN106040447B (en) | 2016-08-04 | 2016-08-04 | A kind of air protection method for centrifuge inner cavity |
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| CN106040447A CN106040447A (en) | 2016-10-26 |
| CN106040447B true CN106040447B (en) | 2018-06-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107252741A (en) * | 2017-06-22 | 2017-10-17 | 常州合全药业有限公司 | The whole nitrogen protection operating procedure of plate centrifuge |
| CN108889458B (en) * | 2018-08-08 | 2024-01-02 | 江苏同泽过滤科技有限公司 | Explosion-proof centrifuge system |
| CN113472144B (en) * | 2021-08-09 | 2023-04-07 | 盾石磁能科技有限责任公司 | Generator positive pressure protection system and power generation device |
| CN113578538A (en) * | 2021-08-09 | 2021-11-02 | 安徽泓泽新材料科技有限公司 | Gas protection method for inner cavity of centrifugal machine |
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| US3763572A (en) * | 1970-06-09 | 1973-10-09 | H Titus | Method and apparatus for pneumatically discharging a drum centrifuge |
| CN2748179Y (en) * | 2004-10-29 | 2005-12-28 | 张家港华大离心机制造有限公司 | Nitrogen protection explosion-proof arrangement of centrifugal machine |
| CN202146827U (en) * | 2011-06-22 | 2012-02-22 | 郑州新力德粮油科技有限公司 | Nitrogen protection explosion-proof device for centrifuge |
| CN102580863A (en) * | 2012-02-27 | 2012-07-18 | 蚌埠精工制药机械有限公司 | Nitrogen protection device of centrifugal machine |
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|---|---|---|---|---|
| JP5547331B1 (en) * | 2013-11-04 | 2014-07-09 | 巴工業株式会社 | Centrifuge |
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|---|---|---|---|---|
| US3763572A (en) * | 1970-06-09 | 1973-10-09 | H Titus | Method and apparatus for pneumatically discharging a drum centrifuge |
| CN2748179Y (en) * | 2004-10-29 | 2005-12-28 | 张家港华大离心机制造有限公司 | Nitrogen protection explosion-proof arrangement of centrifugal machine |
| CN202146827U (en) * | 2011-06-22 | 2012-02-22 | 郑州新力德粮油科技有限公司 | Nitrogen protection explosion-proof device for centrifuge |
| CN202387588U (en) * | 2011-12-02 | 2012-08-22 | 重庆江北机械有限责任公司 | Sealed explosion-proof nitrogen charging protector for horizontal scraper centrifuge |
| CN102580863A (en) * | 2012-02-27 | 2012-07-18 | 蚌埠精工制药机械有限公司 | Nitrogen protection device of centrifugal machine |
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| CN106040447A (en) | 2016-10-26 |
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