CN105910753A - Cinder notch differential pressure measurement device and method - Google Patents
Cinder notch differential pressure measurement device and method Download PDFInfo
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- CN105910753A CN105910753A CN201610302157.9A CN201610302157A CN105910753A CN 105910753 A CN105910753 A CN 105910753A CN 201610302157 A CN201610302157 A CN 201610302157A CN 105910753 A CN105910753 A CN 105910753A
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- pressure
- cinder notch
- measurement device
- differential pressure
- measuring pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
- G01L13/04—Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
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Abstract
The present invention discloses a cinder notch differential pressure measurement device and method. The upper tube wall of the down pipe in the cinder notch differential pressure measurement device is provided with a pressure port, and a through hole is arranged at the gasifier wall at the outside of the chilling chamber of a gasifier; and the cinder notch differential pressure measurement device includes a piezometer tube, the pressure leading port of the piezometer tube is connected with the pressure port, the piezometer tube passes through the through hole, and the piezometer tube and the vaporizing chamber of the gasifier are connected with a differential pressure meter. The cinder notch differential pressure measurement method is access by water and taken as a measurement medium in the piezometer tube so as to avoid the problem that the low-speed and low-temperature nitrogen cannot solve the obstruction of the pressrre leading port caused by the flow of the slag in the prior art. The cinder notch differential pressure measurement device and method are able to accurately measure the cinder notch pressure difference of an entrained-flow bed gasifier and provide operation basis for the normal running of the gasifier; and the cinder notch differential pressure measurement device and method are not easy to cause the obstruction of the air-blowing port, facilitate the daily maintenance of the gasifier and save the manpower and material resource cost.
Description
Technical field
The present invention relates to a kind of cinder notch differential pressure measurement devices and methods therefor.
Background technology
Coal gasification processes is using oxygen (air, oxygen-enriched or industrial pure oxygen), steam as gasifying agent,
By chemical reaction, the combustible constituent in coal or coal tar is converted into imflammable gas at high temperature under high pressure
Technical process, wherein entrained flow bed gasification technology has because of its good technical specification, high disposal load and environment
The feature such as good, becomes the mainstream technology of current Coal Gasification.In airflow bed gasification furnace, furnace wall lining and
Its structure is gasification furnace design and the key point run.
Along with high-quality coal resource is the most rare, high ash, high ash melting point colm (mixed coal inferior) are often
For entrained flow gasification.In existing operation gasification installation, often occur that gasification furnace cinder notch deslagging is smooth, slag
Mouth clogging, has had a strong impact on the safe operation of gasification furnace.It is currently used for judging the measurement that cinder notch blocks
Method is the pressure reduction measuring vaporizer with shock chamber's upper space, and the shortcoming measurement of this measuring method is arrived
Pressure difference data includes the liquid level difference of cinder notch pressure reduction and scrubbing-cooling chamber, and the error in data therefore measured is bigger.
Chinese patent application CN104634504A discloses a kind of accurate measurement gasification furnace cinder notch pressure reduction
Device and measuring method thereof.During measuring, use nitrogen air blast, have yet with in this region
For protecting the liquid film of down-comer, the gas flow rate of blowout is excessive not only can cause measurement error, Er Qiehui
Disturbance liquid film.Specifically, this application uses low discharge nitrogen air blast, the most respectively to combustor and Quench
Room is passed through 1.5Nm3/h (hot wall stove 44Nm3/h) and the high pressure nitrogen of 1.5Nm3/h, during normal operating,
The pressure of gasification furnace and the pressure of high pressure nitrogen are above 4.0MPa, therefore the inflatable mouth of diameter 15mm
Interior nitrogen speed is less than 0.059m/s.But, under complicated slag, synthesis gas and chilled water mingle
Fall tube inlet, it is easy to cause inflatable mouth to block, thus cause the failure of cinder notch differential pressure measurement.Therefore industry
Run gasification furnace and be badly in need of exploitation a kind of certainty of measurement height, the cinder notch differential pressure measurement technology of resistance to blocking.
Summary of the invention
The present invention is to solve prior art easily causes inflatable mouth blocking, thus cinder notch pressure reduction is caused to survey
Measure failed technical problem, it is provided that a kind of cinder notch differential pressure measurement devices and methods therefor.
The present invention solves above-mentioned technical problem by following technical proposals:
A kind of cinder notch differential pressure measurement device, the top tube wall of down-comer is provided with a pressure port, swashing of gasification furnace
Gasification furnace wall outside cold house is provided with a through hole；Described cinder notch differential pressure measurement device includes a pressure-measuring pipe, institute
The impulse mouth stating pressure-measuring pipe is connected with described pressure port, and described pressure-measuring pipe passes described through hole, and described
Pressure-measuring pipe is all connected with differential manometer with the vaporizer of described gasification furnace.The setting of pressure-measuring pipe can be used for surveying
Amount cinder notch pressure reduction, takes into account resistance to blocking simultaneously and avoids effects such as liquid film disturbings；The upstream of described pressure-measuring pipe
It is provided with flow control valve and effusion meter, for regulating water flow.
It is preferred that the angle a of described pressure-measuring pipe and described down-comer is 20-45 °, to guarantee to eject
The direction of current, it is to avoid the distribution of down-comer opposite side liquid film is had adverse effect on；When angle is less than
When 20 °, pressure-measuring pipe and down-comer cross the ellipse that hole is plagioclase produced, and area is bigger than normal, easily blocks；
When angle is more than 45 °, the fluid ejected directly impacts opposite side down-comer liquid film, causes liquid film to be distributed
Uneven.
It is preferred that a diameter of D of described down-comer, between the top of described pressure port and described down-comer
Distance H be 0.05-0.1D, to reduce water that jet goes out to liquid film distribution influence；And industrial practice card
Bright, when meeting this proportionate relationship, slag blocking is not easily formed.
It is preferred that a diameter of d1 of described impulse mouth, the main diameter of described pressure-measuring pipe is d2, and institute
State d1 and described d2 and meet d2/d1=1-2, to improve effluxvelocity, reduce pressure-measuring pipe current stream simultaneously
The dynamic overall pressure drop self produced.
It is preferred that described impulse mouth and described pressure port connection, described pressure-measuring pipe are through described through hole
Place is equipped with elbow, and the two ends of described elbow are by flange seal, to prevent vibration from causing pressure-measuring pipe to damage
Bad.
Present invention also offers a kind of cinder notch pressure reduction applying cinder notch differential pressure measurement device described above to survey
Metering method, is passed through water as measuring medium in described pressure-measuring pipe.Prior art generally uses low speed nitrogen
As measuring medium, measurement easily occurs inflatable mouth blocking, thus causes the failure of cinder notch differential pressure measurement；If
Increase nitrogen flow and can avoid this problem to a certain extent, but owing to being blown into of high speed nitrogen can make to measure
On the down-comer that mouth bottom pressure-measuring pipe connects, liquid film fluctuates, thus causes down-comer ablation；And this
Bright adopting uses water as measuring medium, efficiently avoid these problems: the density of water is bigger than the density of nitrogen
A lot, therefore under identical purging momentum, the speed of water is less than nitrogen, little to the liquid film disturbing of down-comer；
Liquid in down-comer is also water, therefore liquid film will not be caused to stop；Slag can be played by the water sprayed in addition
Quenching effect.
The cinder notch pressure reduction △ p of described gasification furnace is calculated by following formula:
△ p=△ pMeasure+p2-p1；
Wherein, p1For the pressure of described impulse mouth, unit is MPa；
p2For the junction pressure of described pressure-measuring pipe Yu described differential manometer, unit is MPa；
△pMeasurePressure between the described vaporizer and the described pressure-measuring pipe that obtain for described differential manometer on-line measurement
Difference, unit is MPa.
It is preferred that the water jet velocity of described impulse mouth is 0.5-5m/s.When water jet velocity is too low,
Easily cause the blocking of impulse mouth in down-comer, and the kinetic energy of current cannot be utilized to wash tamper open；Work as water
When jet velocity is too high, the pressure drop that current flow through pipeline is bigger than normal, and therefore measurement error is bigger than normal, simultaneously under
The liquid film disturbing of fall pipe opposite side also can increase.
It is preferred that described water is desalted water or boiler water.
On the basis of meeting common sense in the field, above-mentioned each optimum condition, can combination in any, i.e. get Ben Fa
Bright each preferred embodiments.
The most progressive effect of the present invention is: the cinder notch differential pressure measurement device and method of the present invention can essence
Really measure the cinder notch pressure reduction of airflow bed gasification furnace, provide operation foundation for gasification furnace is properly functioning；And do not allow
Easily cause inflatable mouth blocking, facilitate the regular maintenance of gasification furnace, save manpower and material resources cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of cinder notch differential pressure measurement device preferred embodiment of the present invention.
Fig. 2 is the structure for amplifying schematic diagram of cinder notch in Fig. 1.
Fig. 3 is the structure for amplifying schematic diagram of pressure-measuring pipe in Fig. 1.
Detailed description of the invention
Further illustrate the present invention below by the mode of preferred embodiment, but the most therefore the present invention is limited
System is among described scope of embodiments.
As it is shown in figure 1, a kind of cinder notch differential pressure measurement device, the top tube wall of down-comer 3 is provided with a pressure
Hole, the gasification furnace wall outside the shock chamber of gasification furnace 1 is provided with a through hole 2；Described cinder notch differential pressure measurement fills
Put and include that a pressure-measuring pipe 4, the impulse mouth 5 of described pressure-measuring pipe 4 are connected with described pressure port, described survey
Pressure pipe 4 is through described through hole 2, and the vaporizer of described pressure-measuring pipe 4 and described gasification furnace 1 is all and pressure reduction
Meter 6 is connected；The upstream of described pressure-measuring pipe 4 is provided with flow control valve and effusion meter.
As in figure 2 it is shown, the angle a of described pressure-measuring pipe 4 and described down-comer 3 is 20-45 °；Described
A diameter of D of down-comer 3, distance H between the top of described pressure port and described down-comer 3 is
0.05-0.1D。
As it is shown on figure 3, be passed through in described pressure-measuring pipe 4 water as measure medium, can be selected for desalted water or
Boiler water；The water jet velocity of described impulse mouth 5 is 0.5-5m/s；A diameter of d1 of described impulse mouth 5,
The main diameter of described pressure-measuring pipe 4 is d2, and described d1 and described d2 meets d2/d1=1-2；Described
Pressure-measuring pipe 4 is p with the junction pressure of described differential manometer2, the pressure of described impulse mouth 5 is p1, described
The internal pressure loss of pressure-measuring pipe 4 is (p2-p1)；Vaporizer described in the on-line measurement of described differential manometer 6 with
Pressure reduction △ p between described pressure-measuring pipe 4Measure；
The cinder notch pressure difference measurement method of the present invention is in order to eliminate the survey caused because of the dynamic head of water purging generation
Amount error, introduces correction formula and is modified cinder notch differential pressure measurement result.
To p1, p2Bernoulli equation is done in cross section to be had:
Wherein λ is pipe resistance coefficient, and the impulse mouth jet velocity being connected with down-comer is more than 0.5m/s,
Tube fluid Reynolds number is more than 105, fluid is in turbulence state, and λ is the most relevant with pipe roughness, it may be assumed that
λ={ 1.74+2lg [d/ (2 ε)] }-2, so:
Described cinder notch pressure reduction is
Δ p=Δ pMeasure+p2-p1 (3)
In describing the invention, it is to be understood that term " on ", D score, "front", "rear",
"left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " etc. instruction orientation or
Position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of the description present invention and Jian
Change and describe rather than indicate or imply that the device of indication or element must have specific orientation, with specific
Azimuth configuration and operation, be therefore not considered as limiting the invention.
Although the foregoing describing the detailed description of the invention of the present invention, but those skilled in the art should managing
Solving, these are merely illustrative of, and protection scope of the present invention is defined by the appended claims.This
The technical staff in field, can be to these embodiment party on the premise of without departing substantially from the principle of the present invention and essence
Formula makes various changes or modifications, but these changes and amendment each fall within protection scope of the present invention.
Claims (8)
1. a cinder notch differential pressure measurement device, it is characterised in that the top tube wall of down-comer is provided with and takes
Pressure hole, the gasification furnace wall outside the shock chamber of gasification furnace is provided with a through hole；Described cinder notch differential pressure measurement device
Including a pressure-measuring pipe, the impulse mouth of described pressure-measuring pipe is connected with described pressure port, and described pressure-measuring pipe passes
Described through hole, and described pressure-measuring pipe is all connected with differential manometer with the vaporizer of described gasification furnace, described survey
The upstream of pressure pipe is provided with flow control valve and effusion meter.
2. cinder notch differential pressure measurement device as claimed in claim 1, it is characterised in that described pressure-measuring pipe
It is 20-45 ° with the angle a of described down-comer.
3. cinder notch differential pressure measurement device as claimed in claim 1, it is characterised in that described down-comer
A diameter of D, distance H between the top of described pressure port and described down-comer is 0.05-0.1D.
4. cinder notch differential pressure measurement device as claimed in claim 1, it is characterised in that described impulse mouth
A diameter of d1, the main diameter of described pressure-measuring pipe is d2, and described d1 and described d2 meet
D2/d1=1-2.
5. cinder notch differential pressure measurement device as claimed in claim 1, it is characterised in that described impulse mouth
It is equipped with elbow through described through hole with described pressure port connection, described pressure-measuring pipe, and described curved
Flange seal is passed through at the two ends of head.
6. one kind applies the cinder notch of cinder notch differential pressure measurement device as according to any one of claim 1-5
Pressure difference measurement method, it is characterised in that be passed through water in described pressure-measuring pipe as measuring medium；Described gas
The cinder notch pressure reduction △ p changing stove is calculated by following formula:
△ p=△ pMeasure+p2-p1；
Wherein, p1For the pressure of described impulse mouth, unit is MPa；
p2For the junction pressure of described pressure-measuring pipe Yu described differential manometer, unit is MPa；
△pMeasurePressure between the described vaporizer and the described pressure-measuring pipe that obtain for described differential manometer on-line measurement
Difference, unit is MPa.
7. a cinder notch pressure difference measurement method as claimed in claim 6, it is characterised in that described in draw
The water jet velocity of pressure mouth is 0.5-5m/s.
8. a cinder notch pressure difference measurement method as claimed in claim 6, it is characterised in that described water
For desalted water or boiler water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610302157.9A CN105910753B (en) | 2016-05-09 | 2016-05-09 | A kind of cinder notch pressure difference measuring device and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610302157.9A CN105910753B (en) | 2016-05-09 | 2016-05-09 | A kind of cinder notch pressure difference measuring device and its method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105910753A true CN105910753A (en) | 2016-08-31 |
| CN105910753B CN105910753B (en) | 2019-02-22 |
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| CN201610302157.9A Active CN105910753B (en) | 2016-05-09 | 2016-05-09 | A kind of cinder notch pressure difference measuring device and its method |
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| CN104634504A (en) * | 2015-02-27 | 2015-05-20 | 水煤浆气化及煤化工国家工程研究中心 | Device for accurately measuring pressure difference of slag hole of gasification furnace and measurement method thereof |
| CN204855079U (en) * | 2015-05-27 | 2015-12-09 | 广东大唐国际潮州发电有限责任公司 | Pressure, automatic device that sweeps of differential pressure measurement |
| CN205748775U (en) * | 2016-05-09 | 2016-11-30 | 华东理工大学 | A kind of cinder notch differential pressure measurement device |
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2016
- 2016-05-09 CN CN201610302157.9A patent/CN105910753B/en active Active
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| CN2539159Y (en) * | 2002-02-01 | 2003-03-05 | 北京市合百意生态能源科技开发有限公司 | Rural domestic low liquid column pressure-meter for testing methane |
| CN201281641Y (en) * | 2008-10-06 | 2009-07-29 | 巨石集团有限公司 | Device for measuring pressure of glass kiln |
| CN201307046Y (en) * | 2008-11-14 | 2009-09-09 | 艾默生网络能源有限公司 | Pipeline differential pressure detecting device of water cooling system |
| CN201331407Y (en) * | 2009-01-06 | 2009-10-21 | 河南理工大学 | Device for detecting and monitoring pressure in carbon material roasting oven |
| CN102052834A (en) * | 2011-01-21 | 2011-05-11 | 宋生权 | Improvement structure of regenerative fuel gas aluminum melting furnace |
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| CN104232171A (en) * | 2014-09-23 | 2014-12-24 | 安徽六国化工股份有限公司 | Liquid level anti-blocking device for chilling chamber of gasification furnace |
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| CN205748775U (en) * | 2016-05-09 | 2016-11-30 | 华东理工大学 | A kind of cinder notch differential pressure measurement device |
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| CN105910753B (en) | 2019-02-22 |
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