CN201819860U - Device for on-line measuring density and pH of gypsum slurry through wet FGD (Flue Gas Desulfurization) method - Google Patents
Device for on-line measuring density and pH of gypsum slurry through wet FGD (Flue Gas Desulfurization) method Download PDFInfo
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- CN201819860U CN201819860U CN 201020568419 CN201020568419U CN201819860U CN 201819860 U CN201819860 U CN 201819860U CN 201020568419 CN201020568419 CN 201020568419 CN 201020568419 U CN201020568419 U CN 201020568419U CN 201819860 U CN201819860 U CN 201819860U
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Abstract
The utility model relates to a device for on-line measuring the density and the pH of gypsum slurry through wet FGD (Flue Gas Desulfurization) method. The device comprise a box body, a box cover, a densimeter and a pH meter, wherein the box body is provided with a slurry inlet adapter and a slurry outlet adapter, an overflow pipe is arranged in a box, the inlet at the upper end of the overflow pipe is positioned at certain height of the box body, and the outlet at the lower end is led to the external part of the box; the pH meter is inserted in the box from the box cover, and the height of the electrode at the lower end of the pH meter in the box is at least lower than that of the inlet of the overflow pipe; and the densimeter is mounted on the side wall of the box body, a sensor of the densimeter extends into the box, and the height of the sensor in the box is at least lower than that of the inlet of the overflow pipe. The pH glass electrode and the sensor of the densimeter can not be damaged by the slurry in the box of the device, the sedimentation of solid particles can be reduced, the blockade is prevented, therefore, the service life is prolonged, the operation is reliable, and the on-line slurry density and pH value of the gypsum slurry can be measured continuously.
Description
Technical field
The utility model relates to a kind of smoke-gas wet desulfurization gypsum slurries density and pH on-line measurement device, is used for the gypsum slurries density of wet method flue gas-desulfurizing absorption tower discharge and the on-line continuous of pH and measures.
Background technology
Coal burning flue gas desulfurization mainly adopts the limestone-gypsum wet desulfurizing process at present, and the gypsum slurries in the absorption tower is carried by slurry pump and returned spraying layer continuation absorption SO
2Or deliver to dewatering system and produce gypsum.The density of gypsum slurries and pH value play crucial effects to operation, the control of whole desulphurization system, therefore must carry out the on-line continuous measurement to gypsum slurries density and the pH value that discharge on the absorption tower.
Domestic most of desulfurizer gypsum slurries density measuring methods are at present: a bit of slurries shunt valve is set on the outlet conduit of gypsum slurries extraction pump, slurries are introduced in the shunt valve, carry out density measure by the duct type mass flowmeter.But the inconsistent meeting of the shunt valve and the person in charge's caliber makes the slurry flow rate of measurement point produce bigger fluctuation, is difficult to control stably, therefore causes mass flowmeter long-term stability not move reliably.
And the gypsum slurries pH value measurement method that domestic most of desulfurizer adopted is: arm is installed on the plaster slurry pump outlet conduit, plug-in type pH electrode is installed on arm, introduce wash-down water simultaneously.Because slurry flow rate is higher in the pipeline, the pH electrode is is easily worn and torn by fluid erosion, and gypsum particle is fouling around electrode easily, and glass electrode is broken when serious, can't use; And the wash-down water aligning pH electrode that is used for snaking impacts also easy damaged electrode.
Summary of the invention
The purpose of this utility model provides a kind of smoke-gas wet desulfurization gypsum slurries density and pH on-line continuous measurement mechanism, overcomes the defective of the existence that plug-in type pH electrode is installed on traditional duct type mass flowmeter and the pipeline.
This measurement mechanism comprises casing, case lid, densitometer and plug-in type pH meter, and casing is provided with slurry inlet and takes over and the slurries discharge connection, is provided with run-down pipe in the case, and run-down pipe upper end import is positioned at the casing certain altitude, outside the logical case of lower end outlet; The electrode that pH meter inserts pH meter lower end in the case from case lid is lower than the import of run-down pipe at least at the case inner height; Densitometer is installed in wall box, and densitometric sensor stretches in the case, and its position in case is lower than the import of run-down pipe at least.
Said slurry inlet pipe and slurries outlet all are located at the bottom of casing.
Said slurry inlet pipe is connected with throttling orifice plate.
Bottom half can be provided with wash-down water in addition and take over, and also can be taken over by slurry inlet pipe double as wash-down water.
The gypsum slurries of this measurement mechanism is from absorption tower bottom or circulating-pump outlet, feeds the liquid level of slurries by slurries in the run-down pipe restriction case in the casing of this measurement mechanism, when liquid level surpasses run-down pipe, promptly flows out from run-down pipe, feeds trench.Fully contact with the electrode of densitometer sensor in the case, record gypsum slurries density and pH value with p H meter.The import and export of slurries all is located at bottom half, away from pH meter and densitometer, make the interior slurry of case mild, electrode and densitometer sensor to pH meter do not impact, and it is also little to wear and tear, and can not damage glass electrode and densitometer sensor, also can reduce the solid particle deposition, prevent to stop up, so the prolongation in serviceable life of this device, reliable.The interior slurries of case are in continuously latent fixed flow state, and slurries upgrade fast, and measurement lags behind little.Therefore this device can record the online liquid density and the pH value of calcium plaster continuously, records data accurately and reliably.
Description of drawings
Fig. 1 is the structural representation of density and pH on-line measurement device.
Fig. 2 is the schematic flow sheet that this measurement mechanism is connected with the slurries system.
Among the figure, 1-case lid, 2-casing, 3-run-down pipe, 4-slurry inlet is taken over, 5-plasma discharge mouth, 6-densitometer installing port, 7-densitometer, 7-1-densitometer sensor, 8-pH meter, 8-1-pH meter electrode, 10-trench, the female pipe of 11-slurries, 12-measurement door, 13-flushing door, 14-throttling orifice plate.
Embodiment
As shown in Figure 1, slurry inlet adapter 4 and slurries discharge connection 5 are located at the bottom of casing 2, are provided with run-down pipe 3 in the case, and the upper end import of run-down pipe 3 is positioned at the case certain altitude, and its lower end outlet extends to outside the case at the bottom of case.PH meter 8 inserts in the case from case lid 1, and pH electrode 8-1 is positioned at below the import of run-down pipe 3, and from about the 200mm height of case bottom, prevents that the gypsum deposition buries electrode in the case, causes the electrode surface severe deposits.Densitometer 7 is installed on the installing port 6 of casing 2 sidewalls, is connected and fixed by flange; The sensor 7-1 of densitometer 7 stretches in the casing 2 from mounting interface 6, and setting height(from bottom) is below the import of the upper end of run-down pipe 3.
The annexation and the course of work of this density and pH on-line measurement device and slurries system are described below by Fig. 2.
Open the measurement door 12 on the female pipe 11 of slurries, take over 4 from the gypsum slurries at the bottom of the absorption Tata through throttling orifice plate 14, slurry inlet, enter in the casing 2 of this measurement mechanism, case entoplasm liquid level rises, and with the complete submergence of sensor of the electrode and the densitometer 7 of pH meter 8; After the slurries face rises to the inlet height of run-down pipe 3, promptly flow out downwards, enter trench 10 by pipeline from the upper end import of run-down pipe 3.
Throttling orifice plate 14 scalable slurry stream are gone into the flow velocity of casing 2, make flow velocity both satisfy densitometric measurement requirement, can prevent that again serous granule from depositing in case.Density value and pH value are by transmitter, and directly outputting standard 4-20mA signal send DCS system, show in the pulpit operator station, for system's operation provides important evidence.When needing flushing, close and measure door 12, open flushing door 13, take over 4 to slurry inlet and introduce water (desulphurization system fresh water (FW)), just can be to washing in the case, the water after the flushing is discharged from run-down pipe 8 and plasma discharge mouth 5, enters trench 10.Be full of clear water in the casing 2, just can demarcate densitometer, very convenient.
Claims (4)
1. smoke-gas wet desulfurization gypsum slurries density and pH on-line measurement device, it is characterized in that comprising casing, case lid, densitometer and pH meter, casing is provided with slurry inlet and takes over and the slurries discharge connection, is provided with run-down pipe in the case, run-down pipe upper end import is positioned at the casing certain altitude, outside the logical case of lower end outlet; PH meter inserts in the case from case lid, and the electrode of pH meter lower end is lower than the import of run-down pipe at least at the case inner height; Densitometer is installed in wall box, and densitometric sensor stretches in the case, and its position in case is lower than the import of run-down pipe at least.
2.
Smoke-gas wet desulfurization gypsum slurries density according to claim 1 and pH on-line measurement device is characterized in that said slurry inlet pipe and slurries outlet all be located at the bottom of casing.
3. smoke-gas wet desulfurization gypsum slurries density according to claim 1 and 2 and pH on-line measurement device is characterized in that said slurry inlet pipe is connected with throttling orifice plate.
4. smoke-gas wet desulfurization gypsum slurries density according to claim 3 and pH on-line measurement device is characterized in that the bottom of casing is provided with the wash-down water adapter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020568419 CN201819860U (en) | 2010-10-20 | 2010-10-20 | Device for on-line measuring density and pH of gypsum slurry through wet FGD (Flue Gas Desulfurization) method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020568419 CN201819860U (en) | 2010-10-20 | 2010-10-20 | Device for on-line measuring density and pH of gypsum slurry through wet FGD (Flue Gas Desulfurization) method |
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| Publication Number | Publication Date |
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| CN201819860U true CN201819860U (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201020568419 Expired - Lifetime CN201819860U (en) | 2010-10-20 | 2010-10-20 | Device for on-line measuring density and pH of gypsum slurry through wet FGD (Flue Gas Desulfurization) method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489144A (en) * | 2011-12-23 | 2012-06-13 | 武汉光谷环保科技股份有限公司 | Measure apparatus of flue gas desulphurization absorbing tower, slurry pH meter and densitometer by using wet method and its method |
| CN102841119A (en) * | 2012-09-29 | 2012-12-26 | 安徽金星钛白（集团）有限公司 | On-line pH (Potential of Hydrogen) value sampling measurement device for slurry material |
| CN105709582A (en) * | 2016-05-03 | 2016-06-29 | 上海汉卓能源科技有限公司 | PH meter installation case |
| CN106975339A (en) * | 2017-05-09 | 2017-07-25 | 大唐环境产业集团股份有限公司 | Flue gas desulfurization pH value measurement apparatus |
| CN108801850A (en) * | 2018-06-21 | 2018-11-13 | 国电环境保护研究院有限公司 | A kind of flue gas wet flue gas desulfurization gypsum slurries are in line density and pH value combined measurement device and measurement method |
| CN114624300A (en) * | 2022-03-10 | 2022-06-14 | 西安热工研究院有限公司 | Solid particle erosion resistant type online chlorine meter/pH meter sensor |
-
2010
- 2010-10-20 CN CN 201020568419 patent/CN201819860U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489144A (en) * | 2011-12-23 | 2012-06-13 | 武汉光谷环保科技股份有限公司 | Measure apparatus of flue gas desulphurization absorbing tower, slurry pH meter and densitometer by using wet method and its method |
| CN102841119A (en) * | 2012-09-29 | 2012-12-26 | 安徽金星钛白（集团）有限公司 | On-line pH (Potential of Hydrogen) value sampling measurement device for slurry material |
| CN105709582A (en) * | 2016-05-03 | 2016-06-29 | 上海汉卓能源科技有限公司 | PH meter installation case |
| CN106975339A (en) * | 2017-05-09 | 2017-07-25 | 大唐环境产业集团股份有限公司 | Flue gas desulfurization pH value measurement apparatus |
| CN108801850A (en) * | 2018-06-21 | 2018-11-13 | 国电环境保护研究院有限公司 | A kind of flue gas wet flue gas desulfurization gypsum slurries are in line density and pH value combined measurement device and measurement method |
| CN114624300A (en) * | 2022-03-10 | 2022-06-14 | 西安热工研究院有限公司 | Solid particle erosion resistant type online chlorine meter/pH meter sensor |
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Granted publication date: 20110504 |
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| CX01 | Expiry of patent term |