CN102759494A - Source obtaining device and method in slurry density measurement of desulfurization tower - Google Patents
Source obtaining device and method in slurry density measurement of desulfurization tower Download PDFInfo
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- CN102759494A CN102759494A CN2012102592315A CN201210259231A CN102759494A CN 102759494 A CN102759494 A CN 102759494A CN 2012102592315 A CN2012102592315 A CN 2012102592315A CN 201210259231 A CN201210259231 A CN 201210259231A CN 102759494 A CN102759494 A CN 102759494A
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Abstract
The invention discloses a source obtaining device and method in slurry density measurement of a desulfurization tower. The device includes two source obtaining openings formed in the outer wall of a desulfurization tower, wherein one source taking opening is a positive pressure side source taking opening, and the other source taking opening is a negative pressure side source taking opening; the positive pressure side source taking opening is connected with a positive pressure side connecting pipe arranged upwards and obliquely; the upper end of the positive pressure side connecting pipe is connected with a lower interface of a positive pressure side measurement tee joint through a positive pressure side isolation valve; an upper interface of the positive pressure side measurement tee joint is connected with a positive pressure side bleeder tube through a positive pressure side air bleeder; the positive pressure side bleeder tube is fixed with the outer wall of the desulfurization tower through a bleeder tube support; and the top end of the positive pressure side bleeder tube is higher than the upmost liquid level H of the desulfurization tower. Through the adoption of the device and the method, no power equipment is needed, the accuracy of measuring the slurry density of the desulfurization tower is not influenced, the external circulation required by the slurry density measurement is avoided, and the problem that the measuring device is difficult to maintain is solved. The device and the method are suitable for the slurry density measurement of the desulfurization tower in a coal burning boiler flue gas desulfurization system through adopting the limestone gypse method.
Description
Technical field
The present invention relates to lime lime-gypsum method coal burning flue gas desulfurization technical field, particularly a kind of measurement mechanism of desulfurizer serum density and measuring method.
Background technology
The density measure of desulfurizer slurries is desulphurization system keys of control automatically in the lime lime-gypsum method coal burning flue gas desulfurization system.Present density measure source-taking apparatus is to adopt calcium plaster liquid pump forced circulation slurries, and the method for installation quality flowmeter is measured the density value of desulfurizer slurries on the slurries pipeline.This method need be utilized power-equipment outer loop slurries, the not only complex structure of device, maintenance inconvenience, and also the measuring accuracy of serum density is not high yet.In addition, the installation cost of mass flowmeter is higher, serviceable life is shorter, has improved the operation and maintenance cost.
As adopt the flange differential pressure transmitter to measure the desulfurizer serum density, need not the external impetus circulation, but when measuring in the slurries solution gas overflow, will influence the precision of measuring numerical value, this problem is still waiting to solve.
Summary of the invention
The present invention provides a kind of source-taking apparatus and method of measuring the desulfurizer serum density, and solve the desulfurizer serosity density measurement needs the external impetus circulation, and measuring accuracy is low, equipment cost is high, safeguard inconvenient technical matters; And solve employing flange differential pressure transmitter measurement desulfurizer serum density, and solution gas overflows in the slurries, and the technical matters of numerical precision is measured in influence.
The technical solution adopted for the present invention to solve the technical problems is:
The source-taking apparatus of this measurement desulfurizer serum density; Comprise that two are opened the mouth in the source of getting of desulfurizer outer wall; Said two get in the mouth of source one is malleation side-draw source mouth, and another be a negative pressure side-draw source mouth, and malleation side-draw source mouth is connected with the malleation side joint pipe of the setting that is inclined upwardly; The lower interface that threeway is measured through malleation side isolation valve and malleation side in malleation side joint pipe upper end is connected; The last interface that the malleation side is measured threeway is sidelong air valve through malleation and is sidelong tracheae with malleation and is connected, and malleation is sidelong tracheae and is fixed by bleeder pipe support and desulfurizer outer wall, and malleation is sidelong the tracheae top and is higher than the highest liquid level H of desulfurizer;
Said negative pressure side-draw source mouth is higher than malleation side-draw source mouth; Negative pressure side-draw source mouth is connected with the suction side adapter that is provided with that is inclined upwardly; Suction side is taken over and the vertical distance of below malleation side joint pipe is 0.8 ~ 1.6m; Suction side is taken over the lower interface of measuring threeway through suction side isolation valve and suction side in the upper end and is connected; The last interface that suction side is measured threeway is connected with the suction side bleeder pipe through the suction side air release, and the suction side bleeder pipe is supported with the desulfurizer outer wall by bleeder pipe and fixes, and suction side bleeder pipe top is higher than the highest liquid level H of desulfurizer;
The side interface that said malleation side is measured threeway is connected with the malleation side measurement flange of flange differential pressure transmitter one end, and the side interface that suction side is measured threeway is connected with the kapillary flange of the flange differential pressure transmitter other end.
The top that said malleation is sidelong tracheae and suction side bleeder pipe all is higher than desulfurizer 1.25 times of the highest liquid level H.
The vertical distance of said malleation side joint pipe and desulfurizer bottom surface is 50～70cm.
The horizontal range that said malleation side joint pipe and suction side are taken over is 40～60cm.
Said malleation side joint pipe and suction side are taken over and the angle of desulfurizer outer wall is 30～45 degree.
The method of this measurement desulfurizer serum density; When normally moving on the absorption tower; Slowly open malleation side isolation valve and suction side isolation valve, the absorption tower slurries are taken over through malleation side joint pipe and suction side and are got into respectively in measurement threeway of malleation side and the suction side measurement threeway; After opening malleation side isolation valve fully and opening the suction side isolation valve; Slowly open malleation more respectively and be sidelong air valve and suction side air release; When the slurries that get into adapter and measurement threeway had dissolved gases to overflow, escaping gas was sidelong tracheae and the discharge of suction side bleeder pipe along malleation respectively; Owing to become stationary state after slurries entering malleation side joint pipe and suction side are taken over, absorption tower slurries gypsum crystal is deposition in malleation side joint pipe and suction side adapter, takes in the inflow tower through malleation side joint pipe and suction side respectively again; According to the principle of linker, obtain pressure differential numerical value through the flange pressure difference transmitter, again through calculating serum density.
Said serum density computing method are following:
The inner slurries of desulfurizer are continuous fluids uniformly, and the pressure of the inner each point of fluid meets fluidstatic Pascal law, that is: this arrives desulfurizer liquid level distance in arbitrfary point pressure=fluid density x fluid in the fluid;
Get A, B 2 points at fluid, establish the A point and be L, establish the B point and be higher than the A point, and the vertical range that A point and B are ordered is D, substitution following formula: A point pressure=fluid density x L to desulfurizer liquid level distance
B point pressure=fluid density x (L-D)
More than two formulas subtract each other: (A point pressure-B point pressure)=fluid density x D
That is: fluid density=(A point pressure-B point pressure)/D
Find out by following formula; The A point does not influence the calculating of fluid density to the variation of the distance L of desulfurizer liquid level; A point pressure and B point pressure measure flange through the malleation side and the kapillary flange is introduced the flange differential pressure transmitter; The numerical value of A point pressure-B point pressure measures through the flange differential pressure transmitter, and D is that said suction side is taken over and the vertical distance of below malleation side joint pipe is 0.8～1.6m, is constant.
Beneficial effect of the present invention is following:
The present invention is installed in the flange differential pressure transmitter on the outer pipeline of this desulfurizer, realizes the measurement of desulfurizer serum density.Gypsum crystal in the desulfurizer slurries is deposition in malleation side joint pipe and suction side adapter; Take in the inflow tower through malleation side joint pipe and suction side again; Need not power-equipment, prevented that effectively to measure numerical value untrue owing to gypsum deposition forms differential pressure transmitter that obstruction that positive suction side measures causes, do not influence the measuring accuracy of desulfurizer serum density; Avoid serosity density measurement to need outer loop simultaneously, solved measurement mechanism problem difficult in maintenance.
The malleation side and the suction side of this device all are connected with bleeder pipe; After opening malleation and being sidelong air valve and suction side air release; When get into measuring tube with measure the threeway slurries have dissolved gases to overflow the time; Escaping gas is sidelong tracheae and suction side bleeder pipe discharge measuring tube and measurement threeway along malleation respectively, makes that measuring tube is continuous with measuring the threeway slurries, has guaranteed the true and reliable of differential pressure transmitter measurement numerical value.The height of bleeder pipe is higher than 1.25 times of the highest liquid level of desulfurizer, can avoid since the desulfurizer slurries in bleeder pipe because gypsum crystals precipitate flows back in the desulfurizer, the fluid density in the bleeder pipe is lower than serum density in the desulfurizer, causes slurries to overflow.Vertical distance between malleation side joint pipe and suction side are taken over remains on 0.8 ~ 1.6m, has guaranteed the measuring accuracy and the stability of flange differential pressure transmitter.
The flange differential pressure transmitter of this device adopts a side mounting flange, and opposite side is joined the configuration of kapillary flange, has avoided because the measurement numerical value skew that the setting height(from bottom) of transmitter causes.Flange differential pressure transmitter installation site is positioned at the outside, absorption tower, makes things convenient for the maintenance of instrument.
Advantage compared with prior art of the present invention is following:
1, simple in structure, realize density measure through this device, do not need power-equipment, measuring sensor is directly installed on the source-taking apparatus, does not need other auxiliary line.
2, slurries cleaning, the flange differential pressure transmitter does not receive the wearing and tearing of slurries gypsum crystal.
3, easy to maintenance, do not need emptying desulfurizer slurries during the maintenance of flange differential pressure transmitter.
The present invention is applicable to the measurement of desulfurizer serum density in the lime lime-gypsum method coal burning flue gas desulfurization system.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of Figure 1A-A section.
Reference numeral: 1-desulfurizer outer wall, 2-malleation side joint pipe, 3-malleation side isolation valve, 4-malleation side are measured threeway, 5-malleation and are sidelong air valve, adapters of 6-suction side, 7-suction side isolation valve, 8-suction side and measure threeway, 9-suction side air release, the support of 10-bleeder pipe, 11-flange differential pressure transmitter, 12-malleation and be sidelong tracheae, 13-suction side bleeder pipe, 14-malleation side measurement flange, 15-kapillary flange.
Embodiment
Embodiment is referring to Fig. 1, shown in Figure 2; The source-taking apparatus of this measurement desulfurizer serum density; Comprise that two are opened the mouth in the source of getting of desulfurizer outer wall 1, said two get in the mouth of source one is malleation side-draw source mouth, and another is a negative pressure side-draw source mouth; Malleation side-draw source mouth is connected with the malleation side joint pipe 2 that is provided with that is inclined upwardly; Malleation side joint pipe 2 is 60cm with the vertical distance of desulfurizer bottom surface, and the lower interface that threeway 4 is measured through malleation side isolation valve 3 and malleation side in malleation side joint pipe 2 upper ends is connected, and the last interface of malleation side measurement threeway 4 is sidelong air valve 5 through malleation and is sidelong tracheae 12 with malleation and is connected; Malleation is sidelong tracheae 12 and is supported 10 fixingly with desulfurizer outer wall 1 by bleeder pipe, and malleation is sidelong tracheae 12 tops and is higher than 1.25 times of the highest liquid level H of desulfurizer.
Negative pressure side-draw source mouth is higher than malleation side-draw source mouth, and negative pressure side-draw source mouth is connected with the suction side adapter 6 that is provided with that is inclined upwardly, and suction side adapter 6 is 1m with the vertical distance of below malleation side joint pipe 2.Malleation side joint pipe 2 is 50cm with the horizontal range of suction side adapter 6.Suction side is taken over the lower interface of measuring threeway 8 through suction side isolation valve 7 and suction side in 6 upper ends and is connected; The last interface that suction side is measured threeway 8 is connected with suction side bleeder pipe 13 through suction side air release 9; Suction side bleeder pipe 13 is supported 10 fixing with desulfurizer outer wall 1 by bleeder pipe, suction side bleeder pipe 13 tops are higher than 1.25 times of the highest liquid level H of desulfurizer.
The side interface that the malleation side is measured threeway 4 is connected with the malleation side measurement flange 14 of flange differential pressure transmitter 11 1 ends, and the side interface that suction side is measured threeway 8 is connected with the kapillary flange 15 of flange differential pressure transmitter 11 other ends.
The method of this measurement desulfurizer serum density: when normally moving on the absorption tower; Slowly open malleation side isolation valve 3 and suction side isolation valve 7, the absorption tower slurries get into malleation side measurement threeway 4 respectively through malleation side joint pipe 2 and suction side adapter 6 and measure in the threeway 8 with suction side; After opening malleation side isolation valve 3 fully and opening suction side isolation valve 7; Slowly open malleation more respectively and be sidelong air valve 5 and suction side air release 9; When the slurries that get into adapter and measurement threeway had dissolved gases to overflow, escaping gas was sidelong tracheae 12 along malleation respectively and is discharged with suction side bleeder pipe 13; Become stationary state because slurries get into after malleation side joint pipe 2 takes over 6 with suction side, absorption tower slurries gypsum crystal is taken over deposition in 6 at malleation side joint pipe 2 and suction side, takes over 6 through malleation side joint pipe 2 and suction side respectively again and flows in the tower; According to the principle of linker, obtain pressure differential numerical value through flange pressure difference transmitter 11, again through calculating serum density.
Said serum density computing method are following:
The inner slurries of desulfurizer are continuous fluids uniformly, and the pressure of the inner each point of fluid meets fluidstatic Pascal law, that is: this arrives desulfurizer liquid level distance in arbitrfary point pressure=fluid density x fluid in the fluid;
Get A, B 2 points at fluid, establish the A point and be L, establish the B point and be higher than the A point, and the vertical range that A point and B are ordered is D, substitution following formula: A point pressure=fluid density x L to desulfurizer liquid level distance
B point pressure=fluid density x (L-D)
More than two formulas subtract each other: (A point pressure-B point pressure)=fluid density x D
That is: fluid density=(A point pressure-B point pressure)/D
Find out by following formula; The A point does not influence the calculating of fluid density to the variation of the distance L of desulfurizer liquid level; A point pressure and B point pressure are measured flange 14 through the malleation side and are introduced flange differential pressure transmitter 11 with kapillary flange 15; The numerical value of A point pressure-B point pressure measures through flange differential pressure transmitter 11, and D is that the vertical distance of said suction side adapter 6 and below malleation side joint pipe 2 is 0.8～1.6m, is constant.
Claims (7)
1. source-taking apparatus of measuring the desulfurizer serum density; Comprise that two are opened the mouth in the source of getting of desulfurizer outer wall (1); It is characterized in that: said two get in the mouth of source one is malleation side-draw source mouth; Another is a negative pressure side-draw source mouth; Malleation side-draw source mouth is connected with the malleation side joint pipe (2) that is provided with that is inclined upwardly, and malleation side joint pipe (2) upper end is connected through the lower interface of malleation side isolation valve (3) with malleation side measurement threeway (4), and the last interface of malleation side measurement threeway (4) is sidelong air valve (5) through malleation and is sidelong tracheae (12) with malleation and is connected; It is fixing by bleeder pipe support (10) and desulfurizer outer wall (1) that malleation is sidelong tracheae (12), and malleation is sidelong tracheae (12) top and is higher than the highest liquid level H of desulfurizer;
Said negative pressure side-draw source mouth is higher than malleation side-draw source mouth; Negative pressure side-draw source mouth is connected with the suction side adapter (6) that is provided with that is inclined upwardly; The vertical distance that suction side is taken over (6) and below malleation side joint pipe (2) is 0.8 ~ 1.6m; Suction side is taken over the lower interface of measuring threeway (8) through suction side isolation valve (7) and suction side in (6) upper end and is connected; The last interface that suction side is measured threeway (8) is connected with suction side bleeder pipe (13) through suction side air release (9), and it is fixing with desulfurizer outer wall (1) that suction side bleeder pipe (13) supports (10) by bleeder pipe, and suction side bleeder pipe (13) top is higher than the highest liquid level H of desulfurizer;
The side interface that said malleation side is measured threeway (4) is connected with the malleation side measurement flange (14) of flange differential pressure transmitter (11) one ends, and the side interface that suction side is measured threeway (8) is connected with the kapillary flange (15) of flange differential pressure transmitter (11) other end.
2. the source-taking apparatus of measurement desulfurizer serum density according to claim 1 is characterized in that: the top that said malleation is sidelong tracheae (12) and suction side bleeder pipe (13) all is higher than desulfurizer 1.25 times of the highest liquid level H.
3. the source-taking apparatus of measurement desulfurizer serum density according to claim 1 is characterized in that: said malleation side joint pipe (2) is 50～70cm with the vertical distance of desulfurizer bottom surface.
4. the source-taking apparatus of measurement desulfurizer serum density according to claim 1 is characterized in that: the horizontal range that said malleation side joint pipe (2) and suction side are taken over (6) is 40～60cm.
5. the source-taking apparatus of measurement desulfurizer serum density according to claim 1 is characterized in that: the angle that said malleation side joint pipe (2) and suction side are taken over (6) and desulfurizer outer wall (1) is 30～45 degree.
6. an application rights requires the method for the measurement desulfurizer serum density of 1～5 any said device, it is characterized in that:
When normally moving on the absorption tower; Slowly open malleation side isolation valve (3) and suction side isolation valve (7), the absorption tower slurries are taken over (6) through malleation side joint pipe (2) and suction side and are got into respectively in measurement threeway (4) of malleation side and the suction side measurement threeway (8); After opening malleation side isolation valve (3) fully and opening suction side isolation valve (7); Slowly open malleation more respectively and be sidelong air valve (5) and suction side air release (9); When the slurries that get into adapter and measurement threeway had dissolved gases to overflow, escaping gas was sidelong tracheae (12) and suction side bleeder pipe (13) discharge along malleation respectively; Because slurries become stationary state after getting into malleation side joint pipe (2) and suction side adapter (6); Absorption tower slurries gypsum crystal is taken over deposition in (6) at malleation side joint pipe (2) and suction side, takes in (6) inflow tower through malleation side joint pipe (2) and suction side respectively again; According to the principle of linker, obtain pressure differential numerical value through flange pressure difference transmitter (11), again through calculating serum density.
7. according to the method for the said measurement desulfurizer of claim 6 serum density, it is characterized in that: said serum density computing method are following:
The inner slurries of desulfurizer are continuous fluids uniformly, and the pressure of the inner each point of fluid meets fluidstatic Pascal law, that is: this arrives desulfurizer liquid level distance in arbitrfary point pressure=fluid density x fluid in the fluid;
Get A, B 2 points at fluid, establish the A point and be L, establish the B point and be higher than the A point, and the vertical range that A point and B are ordered is D, substitution following formula: A point pressure=fluid density x L to desulfurizer liquid level distance
B point pressure=fluid density x (L-D)
More than two formulas subtract each other: (A point pressure-B point pressure)=fluid density x D
That is: fluid density=(A point pressure-B point pressure)/D
Find out by following formula; The A point does not influence the calculating of fluid density to the variation of the distance L of desulfurizer liquid level; A point pressure and B point pressure measure flange (14) through the malleation side and kapillary flange (15) is introduced flange differential pressure transmitter (11); The numerical value of A point pressure-B point pressure measures through flange differential pressure transmitter (11), and D is that the vertical distance of said suction side adapter (6) and below malleation side joint pipe (2) is 0.8～1.6m, is constant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102592315A CN102759494A (en) | 2012-07-25 | 2012-07-25 | Source obtaining device and method in slurry density measurement of desulfurization tower |
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| CN2012102592315A CN102759494A (en) | 2012-07-25 | 2012-07-25 | Source obtaining device and method in slurry density measurement of desulfurization tower |
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Cited By (3)
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| CN103868822A (en) * | 2013-07-29 | 2014-06-18 | 北京朗新明环保科技有限公司 | Density determination device for slurry in wet desulfurization absorption tower |
| CN104007042A (en) * | 2014-05-29 | 2014-08-27 | 中国神华能源股份有限公司 | Absorption tower system and slurry density measuring device for same |
| CN104236621A (en) * | 2013-06-20 | 2014-12-24 | 五冶集团上海有限公司 | Benzene hydrogenation engineering instrument pipeline and tap component manufacturing and mounting method |
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Application publication date: 20121031 |