CN1006410B - Method and instrument for continuous measuring of steam decomposition ratio - Google Patents
Method and instrument for continuous measuring of steam decomposition ratioInfo
- Publication number
- CN1006410B CN1006410B CN 85100353 CN85100353A CN1006410B CN 1006410 B CN1006410 B CN 1006410B CN 85100353 CN85100353 CN 85100353 CN 85100353 A CN85100353 A CN 85100353A CN 1006410 B CN1006410 B CN 1006410B
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- gas
- sampling
- tube
- pressure
- chew
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Abstract
The present invention provides a method and an instrument for automatically detecting the furnace steam decomposition rate of a gas making furnace which uses coal as raw materials, which can be used for continuously, stably and accurately detecting the furnace steam decomposition rate from a long time. The time response is rapid. The present invention provides an effective immediate detection means for the economic operation and the furnace condition of the gas making furnace, and an electric signal can be output. The instrument has the basic technical characteristics that a ceramic filter element is used, a fixed liquid level high difference method is used for sampling the constant pressure difference, and a micro differential pressure sensor is used for sensing; a sampling signal and an environment temperature difference signal are used for automatic correction; the heat quantity of a sampling coal gas pipeline and the distribution condition of environmental temperature are utilized so as to effectively solve the problem of sampling blockage prevention. The present invention is suitable for detecting other gas to steam ratios.
Description
The present invention relates to the coal is the Gas-making Furnace steam in the boiler utilization factor continuous detecting method and the instrument of raw material.
The method of known measurement steam decomposition rate is: the steam with in the coal gas, be condensed into water with serpentine condenser, and steam is separated with coal gas.Condensate water is collected in the graduated glass tube, measures its volume, according to the volume of condensate water and residual air, and the cubage steam decomposition rate of hydrogen in the coal gas.
This is a kind of manual analytical approach, operate very cumbersome, interrupted sample analysis, and measure inaccurate.
As for the continuous analysis of steam decomposition rate, still there is not the on-line analysis instrument both at home and abroad.Through international online retrieval and hand inspection, also do not see relevant patent report.Comparatively approaching therewith use ZrO
2New type high temperature Ceramic Humidity Meter with MgO, because of its response time long, still can not be used for the steam decomposition rate test of Gas-making Furnace, Japanese three hawk industrial groups are the high Hygrothermograph of zirconia formula of exploitation recently, because of its principle is based on the oxygen analysis, and be not suitable for water coal gas medium.Other various forms of vapour, gas is than analytical equipment, or because of sampling or because of reasons such as working temperature, response times, still can not effectively use.Russian Patent proposes a kind of gas that has water vapour that makes with pneumatic plant for No. 911284 by the water cut in the method mensuration gas of pressure transducer and by-pass valve control flow cell.Test gas is used flowmeter measurement respectively at the pressure of pneumatic plant inlet and indoor pressure.Also use a unit valve door controller that one predetermined input is provided.Indoor potpourri and moisture absorption piece crystal, the room pressure measurement that saturated solution is housed carried out under constant temperature.The equipment that this patent proposes is quite complicated, and the response time is slower.From 66 predetermined inputs are provided " condition consider that incompatible is the mal-condition of the Gas-making Furnace of raw material with the coal, and difficult in maintenance.
The Gas-making Furnace that the objective of the invention is to establish a kind of automatic continuous analysis and with the coal be raw material is gone into the method and the instrument of stove stove steam utilization, can carry out long-term continuous, stable, measurement accurately to the steam in the boiler utilization factor, be swift in response, accomplish in time to measure indication, and output electric signal, provide a kind of effective detection means for realizing the production automatic control.
Basic thought of the present invention is, adopt constant-pressure drop throttling sampling method to stablize sample flow, the pressure reduction that comes constant throttling sampling to chew with the discrepancy in elevation of fixing liquid level, allow the gas after taking a sample directly remove steam by condensate water, the sampling dry gas flow is proofreaied and correct, to satisfy the requirement of constant current sampling, calculate the steam in the boiler resolution ratio again.Method of the present invention is:
(1) obtains the steady gas sampled of flow with constant-pressure drop throttling sampling method, that is: gas to be measured is imported respectively one the sampling gas chew the inlet and have in the liquid of definite liquid level, the gas of again described sampling gas being chewed outlet imports in the described liquid that definite liquid level arranged, and making the two-way gas in the described importing liquid enter liquid at the different depth position place of liquid, the air pressure that makes described sampling gas chew two-port thus is constant and obtain the gas sampled of stability of flow;
(2) allow gas sampled directly remove steam and obtain dry gas stream by condensate water;
(3) utilize probe temperature t
1Chew temperature t with pressure gas
2By formula (1)
I′＝1+0.0021（t
1-t
2） （1）
Obtain the corrected value I ' of dry gas flow;
(4) measure the hydrogen richness of sampling in the dry gas;
(5) formula (2) by special setting calculates steam decomposition rate to be measured:
In above-mentioned (1) (2) formula:
φ-steam decomposition rate (%)
I
0-constant current sampling predetermined amount of flow (litre/minute)
The I-dry gas flow (kg/minute) of taking a sample
I '-sampling dry gas flow corrected value (litre/minute)
H
2Hydrogen richness (%) in-sampling dry gas
t
1-probe temperature (℃)
t
2Pressure gas chew temperature (℃)
Its complete machine structure is as shown in Figure 1: sampling gas is behind ceramic filter tube 1 and throttling valve 4, deliver to the constant-pressure drop sampler, in this device, sampling gas is removed steam by water condensation, remaining dry gas (I), through steam-water separator 29, further remove condensate water, deliver to hydrogen and divide instrument 32, enter sampling dry gas measurement gas again and chew 26, then enter atmosphere.Chew 26 dry gas flow pressure signal by gas, convert electric signal to through little differential pressure sensor 33, and be input to simulation trial and proofread and correct indicating device 34, with chew from sampling gas 20 and pressure gas chew the temperature signal (by the temperature difference decision of the cold and hot end of thermopair 23) at 26 places, and the makings signal that hydrogen divides instrument 32 together, in simulation trial calibration marker 34, I proofreaied and correct, obtain I ', obtain corresponding steam decomposition rate φ according to calculating formula (1) again.
Be to guarantee the accuracy of constant-pressure drop sampling, guarantee that sampling pipe is unblocked for a long time, the whole pipelines that gas was chewed before 20 are incubated, and gas is chewed 20 abut against on the gas piping, utilize the high temperature of coal gas tube wall, make gas chew 20 and remain on the higher temperature.Effectively prevent the steam condensation.Gas is chewed the pipeline under 20, then all adopts the stainless steel straight tube, the alluvial of anti-sealing ash.
In order to guarantee the work of sampling and measuring key position, straight chew facing to gas 20 above, be provided with one and chew 20 and the coaxial cleaning device 21 of stopple coupon 18 with sampling gas, also be provided with one coaxial and be welded on sampling on the stabilivolt 17 and connect and chew 22 with drainage tube, by them, can clear up with Mechanical Method externally directly that troublesome pipeline is gentle to be chewed, it is very simple and reliable that regular job is safeguarded.
To the condensate water part, be the gas disturbed sampling that carries in the anti-sealing, condensate water also must just can enter sampler after additional carbonated drink is separated.
The basic structure of sampling filter is as shown in Figure 2: it is had the ceramic filter tube 1 of a protective metal shell by the outside, place the strainer tube upper port the porous metals pad, place the coke 2 on the porous metals pad, one casting coping 9 that is communicated with the sampler outlet is arranged at iron sand net 3, the top that places on the coke and accompany single-glass cloth, and filter base 8 is formed.
Strainer tube partly stretches into gas piping 7, and external application protective metal shell 5 prevents high velocity air, and lime-ash directly impacts ceramic filter tube.Two sides, sheath bottom respectively have elongate slot, and it is one wide mouthful that rear lateral portion has, and the bottom is equipped with fence 11 and is made carriage, is convenient to ventilate and ash discharge.Between strainer tube upper end and the protective metal shell, asbestos and glass fibre class airtight and watertight padding 6 are arranged, this filler places on the supporting becket, between filter base 8 and the top cover 9, accompanies the sheet asbestos O-ring seal, and tightens together with screw.During use, pedestal 8 is welded on the thief coal feed channel.
Between filtrator top cover and the stabilivolt top, throttling valve 4 is housed also, is used for regulating flow.
All with the insulation material insulation, condense to prevent water vapour in the outside of whole device.This is the requirement of sampling itself, significantly reduces the fouling of pipeline again, stops up and corrosion.
The constant-pressure drop sampler is as shown in Figure 3: it comprises the liquid level benchmark tube 14 of inner water-filling and open-top, bottom is communicated with liquid level benchmark tube (14) bottom and is with holes, the top is higher than the tube of pressure-stabilizing 13 of liquid level benchmark tube, and bottom contour with tube of pressure-stabilizing is communicated with and there is the condensation tube 12 of a gas outlet 28 and water inlet 27 top side, the top is communicated with filtrator and the bottom places in the tube of pressure-stabilizing (13) and be higher than the stabilivolt 17 of connected entrance, the bottom is higher than the stabilivolt bottom and the stopple coupon 18 that 20 gas outlets are connected is chewed with sampling gas in the top, chew the drainage tube 19 that 20 air intake opening and stabilivolt are communicated with sampling gas, place sampling gas chew the top and with sampling gas is chewed and stopple coupon is coaxial cleaning device 21, coaxial and be welded on sampling on the stabilivolt (17) and connect and chew 22 with drainage tube (19), be fixed on stabilivolt (17) or the stopple coupon and have two connection terminals 25 and a pressure gas is chewed 26 metal heat-conducting plate 24, the hot junction is fixed in the drainage tube and cold junction is connected on the thermopair 23 on the metal heat-conducting plate connection terminal.
The basic design philosophy of this device is to keep sampling gas to chew 20 two ends pressure reduction constant, do not taken a sample pneumatolytic branch, Temperature Influence.Since condensate water by connect chew 27 enter after, overflow by the top of liquid level benchmark tube 14, liquid level position is constant relatively.And gas is chewed the pressure reduction at 20 two ends and is equaled stopple coupon outlet B point and stabilivolt (17) and export the density that potential difference that A orders multiply by water.This all is an invariant, and therefore, it is constant that gas is chewed 20 two ends pressure reduction.
Because the temperature of sampling gas is a variable, and variation range is big, and therefore, chew 20 structure when gas certain, and two ends pressure reduction is when constant, chews 20 sampling airshed by gas, will change with probe temperature.From the purpose of constant current sampling, then must carry out probe temperature and proofread and correct sample flow.In addition, the dry gas of same flow is chewed the pressure reduction of 26 generation by gas, also chew the variation of ambient temperature at place with gas, so also must carry out the environment temperature correction.Because of above-mentioned two kinds of temperature variant directions of situation are opposite, for the purpose of simplified apparatus.Utilize the output voltage of thermopair to be proportional to the effect of its cold and hot end temperature.Output signal with same thermopair is made parameter, replaces two interference parameters to imitate the dry gas flow of just taking a sample.
For improving the condensation effect of condensation tube, on the one hand, offer some sulculuses at stopple coupon outlet B place.To bloat after the air-flow dispersion.On the other hand, suitably increase the height of condensation liquid level, prolong the time that sampling gas is stood for a long while and stayed as far as possible in condensate water.
Because of Gas-making Furnace in the blowing program, gas piping occurs taking out negative phenomenon sometimes, causes condensate water to flow backwards in stopple coupon.For avoiding this refluence to change the operating characteristic that gas is chewed 20 places, gas chews 20 must exceed the liquid level certain distance.
For avoiding entering liquid level benchmark tube from the gas that stabilivolt A point comes out, the A point must exceed sampler bottom connected entrance.
In order to prevent steam, tar and so on material is chewed 26 places storage collection and is influenced measuring accuracy getting gas, sampler outlet 28 gas sampled of coming out are connected to the inlet of a three-way pipe, under connect a water-filling U-shaped pipe, and be close on the condensation barrel, utilize the attached wall characteristics of steam, the gas in the gas of further will taking a sample, moisture from after deliver to hydrogen analyzer again, then be connected to pressure gas and chew on 26 the air intake opening.Owing to before sampling gas enters pressure gas and chews 26, passed through a cryostat,, therefore when it enters being taken at gas and chewing 26 places of higher temperature, the relative temperature disengaging saturated mode of sampling gas.Avoided condensation vapor, like this, under the condition that need not add gas purification and dry equipment, can guarantee that gas chews 26 operate as normal.
Outdoor for condensate water is in time drained into, also liquid level benchmark tube is not placed in one and opened upper end in the sampler, the Water collecting tube 16 of a freeing port 15 is arranged at the bottom.
For ease of operation, cleaning device 21 and sampling connect the overcoat of chewing 22 all useful heatproof nonmetal material, have put lid outward, cover to be useful on cleaning gas and to chew draw point with pipeline.
This device can liken analysis continuously and automatically to the steam decomposition rate of Gas-making Furnace and gas, the vapour of outlet water gas: and propose instant indication and export electric signal.Its steam decomposition rate is gentle, the measurement range of vapour ratio is 0～100%.Measure fundamental error and be better than 5 grades.Response time was less than 8 seconds.Complete unit can be worked under-10～+ 45 ℃ environmental baseline, and the operating temperature range of its capacitance-type differential pressure sensor is-25～55 ℃, working power: 50HZ, and 220 ± 20 volts, power consumption is less than 3 watts, no peripheral hardware purifying material, behaviour safeguards very easy.
Fig. 1, complete machine structure theory diagram;
Fig. 2, filtration unit synoptic diagram;
Fig. 3, sampler synoptic diagram;
Among the figure: 1-ceramic filter tube, 2-coke; 3-accompanies the iron sand net of single-glass cloth; The 4-throttling valve; The 5-protective metal shell; 6-asbestos or glass fibre class filler; The 7-gas piping; The 8-filter base; 9-filtrator top cover; 10-porous metals pad; The 11-wire netting; The 12-condensation tube; The 13-tube of pressure-stabilizing; 14-liquid level benchmark tube; The 15-freeing port; The 16-Water collecting tube; The 17-stabilivolt; The 18-stopple coupon; The 19-drainage tube; 20-sampling gas is chewed; The 21-cleaning device; The 22-sampling connects chews; The 23-thermopair; The 24-heat-conducting plate; The 25-connection terminal; 26-pressure gas is chewed; The import of 27-condensate water connects chews; 28-sampler gas outlet; The 29-steam-water separator; The 30-rubber is taken over; 31-pressure interface; 32-hydrogen divides instrument; The 33-little differential pressure sensor; 34-simulation trial calibration indicating device.
Embodiment:
Can finish an optimum implementation of the present invention with reference to accompanying drawing and by following parameter;
1, constant current sample flow: I
O=3.1 liters/minute;
2, sampling gas is chewed 20 diameter of bore d=1.3 millimeter, long L=20 millimeter;
3, sampling gas is chewed potential difference=70 millimeters of water at 20 two ends;
4, sampling gas is chewed inlet pressure=200 millimeters of water of 20;
5, sampling gas is chewed 20 place's temperature: 100～200 ℃;
6, liquid level is chewed 400 millimeters of the distances at 20 places apart from gas;
7, condensation water quantity＞0.15 liter/minute;
8, adopt capacitance-type differential pressure sensor;
Range is 20 millimeters of water.
Claims (10)
1, a kind of measurement is the method for testing of the Gas-making Furnace steam in the boiler resolution ratio of raw material with the coal, and it comprises:
A, usefulness constant-pressure drop throttling sampling mode obtain the gas sampled of stability of flow;
B, gas sampled is directly removed steam by condensate water obtain dry gas stream;
C, utilize probe temperature t
1Chew temperature t with pressure
2, by formula (1)
I
1=1+0.0021(t
1-t
2)
Obtain corrected value,
D, measure the hydrogen richness of sampling in the dry gas;
E, calculate steam decomposition rate to be measured by special formula; Feature of the present invention is, described constant-pressure drop throttling sampling mode is, with gas to be measured import respectively one the sampling gas chew the inlet and have in the liquid of definite liquid level, the gas of again described sampling gas being chewed outlet imports in the described liquid that definite liquid level arranged, and make the two-way gas in the described importing liquid enter liquid at the different depth position place of liquid, the air pressure that makes described sampling gas chew two-port thus is constant and obtain the gas sampled of stability of flow, and described special formula is:
In described formula (1) (2),
φ-steam decomposition rate (%)
I
0-constant current sampling predetermined amount of flow (litre/minute)
The I-dry gas flow of taking a sample
I
1-sampling dry gas flow corrected value (litre/minute)
H
2Hydrogen richness (%) in-sampling dry gas
t
1-probe temperature (O
c)
t
2Temperature (O is chewed in-pressure
c)
2, a kind of measurement is the proving installation of the Gas-making Furnace steam in the boiler resolution ratio of raw material with the coal, it is by filtrator, the constant-pressure drop sampler, hydrogen divides instrument, the emblem differential pressure pick-up, the simulation calibration marker of calculating far away is formed, it is characterized in that filtrator is had the ceramic filter tube of a protective metal shell by the outside, place the porous metals pad of strainer tube upper port, place the coke on the porous metals pad, place on the coke and accompany the iron sand net of single-glass cloth, the casting coping of one connection sampler outlet is arranged at the top, and filter base is formed, the constant-pressure drop sampler comprises the liquid level benchmark tube of inner water-filling and open-top, and bottom is communicated with liquid level benchmark tube bottom and top with holes is higher than the tube of pressure-stabilizing of liquid level benchmark tube, and bottom contour with tube of pressure-stabilizing is communicated with and there is the condensation tube of a gas outlet and water inlet the top side, the top is communicated with filtrator and the bottom places in the tube of pressure-stabilizing and be higher than the stabilivolt of connected entrance, the bottom is higher than the stabilivolt bottom and the stopple coupon that the gas outlet is connected is chewed with sampling gas in the top, chew the drainage tube that air intake opening and stabilivolt are communicated with sampling gas, place sampling gas chew the top and with sampling gas is chewed and stopple coupon is coaxial cleaning device, connect with the sampling of drainage tube coaxial welding on stabilivolt and to chew, be fixed on stabilivolt or the stopple coupon and have two connection terminals and the metal heat-conducting plate that pressure gas is chewed.The hot junction is fixed on cold junction in the drainage tube and is connected on thermopair on the metal heat-conducting plate connection terminal.
3, according to the described device of claim 2, its feature also is: the rear side of described protective metal shell bottom has a wide mouth, both sides to have elongate slot, bottom that fence is housed.
4, according to the described device of claim 2, its feature also is: asbestos or fiberglass sealed filler are arranged between described strainer tube upper end and the protective metal shell; This filler places on the supporting becket.
5, according to the described device of claim 2, its feature also is: accompany the sheet asbestos O-ring seal between filter base and the top cover, and tighten together with screw.
6, according to the described device of claim 2, its feature also is: between filter outlet and the stabilivolt top throttling valve is housed.
7, according to the described device of claim 2, its feature also is: cleaning device and sampling connect chews the overcoat that all useful heatproof nonmetal material is made, and has put lid outward, covers the draw point that is useful on cleaning.
8, according to the described device of claim 2, its feature also is: condensation tube outlet is connected to a three-way pipe, and the three-way pipe below connects a ц shape pipe that abuts against the inside water-filling on the condensation tube wall, and the three-way pipe outlet divides instrument to be connected to pressure gas through hydrogen to chew.
9, according to the described device of claim 2, its feature also is: the liquid level benchmark tube of constant-pressure drop sampler places opened upper end and bottom to have in the Water collecting tube of a freeing port.
10, according to the described device of claim 2, its feature also is: the stopple coupon bottom has many strias symmetrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85100353 CN1006410B (en) | 1985-04-01 | 1985-04-01 | Method and instrument for continuous measuring of steam decomposition ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85100353 CN1006410B (en) | 1985-04-01 | 1985-04-01 | Method and instrument for continuous measuring of steam decomposition ratio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85100353A CN85100353A (en) | 1986-02-10 |
| CN1006410B true CN1006410B (en) | 1990-01-10 |
Family
ID=4791089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85100353 Expired CN1006410B (en) | 1985-04-01 | 1985-04-01 | Method and instrument for continuous measuring of steam decomposition ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1006410B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9678050B2 (en) * | 2014-07-30 | 2017-06-13 | Li-Cor, Inc. | Multi-functional piezo actuated flow controller |
| CN108956369B (en) * | 2018-08-24 | 2024-09-17 | 上海暖友实业有限公司 | Measuring instrument for measuring steam quantity generated by heating appliance and steam quantity detection method |
-
1985
- 1985-04-01 CN CN 85100353 patent/CN1006410B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85100353A (en) | 1986-02-10 |
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