CN205748775U - A kind of cinder notch differential pressure measurement device - Google Patents

Abstract

The utility model discloses a kind of cinder notch differential pressure measurement device, in described cinder notch differential pressure measurement device, the top tube wall of down-comer is provided with a pressure port, and the gasification furnace wall outside the shock chamber of gasification furnace is provided with a through hole；Described cinder notch differential pressure measurement device includes a pressure-measuring pipe, and 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.This utility model can use water as measurement medium, accurately measures the cinder notch pressure reduction of airflow bed gasification furnace, provides operation foundation for gasification furnace is properly functioning；And cannot be easily caused inflatable mouth blocking, facilitate the regular maintenance of gasification furnace, save manpower and material resources cost.

Description

A kind of cinder notch differential pressure measurement device

Technical field

This utility model relates to a kind of cinder notch differential pressure measurement device.

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.

Utility model content

To be solved in the utility model is that prior art easily causes inflatable mouth blocking, thus causes cinder notch pressure The technical problem that difference measurements is failed, it is provided that a kind of cinder notch differential pressure measurement device.

This utility model 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 the flow as the water measuring medium.

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.

On the basis of meeting common sense in the field, above-mentioned each optimum condition, can combination in any, obtain this reality By novel each preferred embodiments.

Positive progressive effect of the present utility model is: cinder notch differential pressure measurement device of the present utility model can Use water as measurement medium, accurately measure the cinder notch pressure reduction of airflow bed gasification furnace, normally transport for gasification furnace Row provides operation foundation；And cannot be easily caused 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 this utility model cinder notch differential pressure measurement device preferred embodiment.

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

This utility model is further illustrated below by the mode of preferred embodiment, but the most therefore by this reality It is limited among described scope of embodiments with novel.

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 4_Measure；

In order to eliminate the measurement error caused because of the dynamic head of water purging generation during this utility model application, draw Enter correction formula cinder notch differential pressure measurement result is modified.

To p₁, p₂Bernoulli equation is done in cross section to be had:

$p_1+\frac{1}{2}{\mathrm{\ρu}}_1^2=p_2+\frac{1}{2}{\mathrm{\ρu}}_2^2-\frac{\mathrm{\λ}L}{d_2}\frac{1}{2}{\mathrm{\ρu}}_2^2---\left(1\right)$

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:

$p_2-p_1=\frac{1}{2}{\mathrm{\ρu}}_2^2\[\frac{u_1^2}{u_2^2}-(1-\frac{\mathrm{\λ}L}{d_2})\]=\frac{1}{2}\mathrm{\ρ}\frac{F_V}{0.25{\mathrm{\πd}}_2^2}\[{\left(\frac{d_2}{d_1}\right)}^4-(1-\frac{\mathrm{\λ}L}{d_2})\]---\left(2\right)$

Described cinder notch pressure reduction is

Δ p=Δ p_Measure+p₂-p₁ (3)

In description of the present utility model, 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 description this utility model With simplify describe rather than instruction or the hint device of indication or element must have specific orientation, with Specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.

Although the foregoing describing detailed description of the invention of the present utility model, but those skilled in the art should Working as understanding, these are merely illustrative of, and protection domain of the present utility model is to be limited by appended claims Fixed.Those skilled in the art is on the premise of without departing substantially from principle of the present utility model and essence, permissible These embodiments are made various changes or modifications, but these changes and amendment each fall within this utility model Protection domain.

Claims (5)

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.