CN206787968U - A kind of limestone-based process spray column slurry density measurement device - Google Patents
A kind of limestone-based process spray column slurry density measurement device Download PDFInfo
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- CN206787968U CN206787968U CN201720134456.6U CN201720134456U CN206787968U CN 206787968 U CN206787968 U CN 206787968U CN 201720134456 U CN201720134456 U CN 201720134456U CN 206787968 U CN206787968 U CN 206787968U
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Abstract
A kind of limestone-based process spray column slurry density measurement device is the utility model is related to, belongs to field of Environment Protection.Pressure measurement bottom of the tube connection outlet pipe, is provided with therebetween underflow valve；Return duct one end is connected with outlet, and the other end is arranged in pressure-measuring pipe top sidewall；Flow-limiting valve is provided with return duct；Inlet tube is installed in pressure-measuring pipe bottom sidewall；The inlet tube other end is connected with spray column bottom sidewall；Inlet valve is provided with inlet tube pipeline；Two pressure taps, backwash water interface and Ph meter interfaces are provided with the side wall of pressure-measuring pipe；The utility model can effectively prevent the generation of inaccurate, the easy fouling condition of original measurement device, operation that can be steady in a long-term, and measure it is accurate.Show accurately measure slurries area CaSO using the device by engineering practice4Density, and according to online PH numerical value, so as to accurately control the plasma discharge time, improve the stability and reliability of desulfurizing tower system operation.
Description
Technical field
A kind of limestone-based process spray column slurry density measurement device is the utility model is related to, belongs to field of Environment Protection.
Background technology
Wet process of FGD is used mostly with a kind of spray equipment that spray column is that sprayed slurry recycles, loop slurry
Lime stone slurry, by the Ca in slurries2+With the SO in flue gas2Reaction generation CaSO4, by the SO in flue gas2Remove so as to reach
The purpose of purifying smoke.When the continuous circulated sprinkling of lime stone slurry is up to CaSO in circulation fluid4Reach certain proportion, and circulate
After the pH value of liquid reduces desulfuration efficiency decline, circulation fluid is discharged into a part, continues to follow after being supplemented fresh lime stone slurry
Ring spray is drenched.So when outer a part of slurries of row are supplemented new slurries, are very important one in desulfurizing tower running
Parameter.The parameter is controlled, both can guarantee that the stable and can of desulfuration efficiency saves lime stone slurry, reduced operating cost, it is heavier
What is wanted is to control CaSO4Concentration can prevent in crystallization inside tower, so as to block shower nozzle and other tower internals, cause desulfurizing tower
The generation of the phenomenon of stoppage in transit.
The desulfurizing tower of early stage is the mode that online PH meter is set up in bottom of towe slurry layer, by the monitoring of online pH value so as to sentencing
It is disconnected when to discharge slurries.But due to the cushioning liquid that loop slurry is strong acid weak base, the pH value of monitoring can not good reaction slurry
Actual numerical value in liquid, along with CaSO4Meeting crystallization on PH meter probes measures many reasons such as inaccurate so as to cause PH to count
Occur, cause in actual motion can not control plasma discharge time well, reduce desulfuration efficiency, crystallization inside tower can more seriously occur
Phenomenon.
By improvement, using measurement CaSO4The mode of density can prevent above-mentioned phenomenon from occurring, by measuring CaSO in tower4
Density can directly know CaSO4Volumetric concentration so as to being accurately controlled the plasma discharge time.Earliest by the way of density skill, but
Similarly there is instrument check using the direct method of measurement to be forbidden, pop one's head in CaSO4The generation of the phenomenon of crystallization so as to cause measurement not
It is accurate.Later, slurries area diverse location install additional pressure sensor by way of, by two pressure sensors directly measure by
The pressure differential of measurement zone, then according to density formula：ρ=P/gh (P：The pressure differential h in slurries area different height section：Two surveys
Vertical range between pressure point) CaSO is calculated indirectly4Density, pressure sensor do not influenceed by crystallizing, measurement accurately from
And solves above mentioned problem.The mounting means of pressure sensor is shown in accompanying drawing 1.
Also gradually show by the operation of a period of time, the shortcomings that this kind of mounting means, be mainly shown as：
1st, the slurries in pipe nipple 1 and pipe nipple 2 are " dead band ", it is impossible to which flowing well, and the slurries in slurries area have density
Difference.
2nd, need frequently to be backwashed using running water, increase the ratio of slurries reclaimed water, be unfavorable for desulfuration efficiency
Lifting.
3rd, the easy fouling of " dead band " slurries in pipe nipple, block measurement pipe, cause measurement inaccurate.
Utility model content
The utility model be for solve the problems, such as due to " dead band " and fouling cause to measure it is inaccurate, there is provided a kind of limestone-based process
Spray column slurry density measurement device.The device can realize tower external pelivimetry.
The purpose of this utility model is achieved through the following technical solutions.
A kind of limestone-based process spray column slurry density measurement device, including pressure-measuring pipe, return duct, inlet tube, outlet, limit
Flow valve, underflow valve, inlet valve, pressure tap, backwash water interface and Ph meter interfaces；
Pressure measurement bottom of the tube connection outlet pipe, is provided with therebetween underflow valve；Return duct one end is connected with outlet, another
End is arranged in pressure-measuring pipe top sidewall；Flow-limiting valve is provided with return duct；Inlet tube is installed in pressure-measuring pipe bottom sidewall；Enter
The mouth pipe other end is connected with spray column bottom sidewall；Inlet valve is provided with inlet tube pipeline；It is provided with the side wall of pressure-measuring pipe
Two pressure taps, backwash water interface and Ph meter interfaces；
The distance between described two pressure taps are 500mm；The pressure tap is formed with pressure-measuring pipe side wall and pressed from both sides
Angle；The angle is 60 °；
The common course of work：After device is fixedly connected with spray column, the slurries in spray column are entered by inlet tube 3 to be surveyed
Then pressure pipe is flowed back in spray column by return duct and outlet；
Backwash --- when having fouling in device：
1st, Shao Liangshi：Underflow valve is opened, closes flow-limiting valve, is realized by spray column and the pressure difference of the present apparatus from backwash；
When the 2nd, measuring more：Underflow valve and flow-limiting valve are opened, by the external water under high pressure pipeline of backwash water interface, is backwashed；
The pressure-measuring pipe of the device be a diameter DN250 stainless steel straight tube, length 2m.
Beneficial effect
The utility model provides a kind of Desulfurization tower slurry density measuring equipment, and the device can effectively prevent original measurement device
The generation of inaccurate, easy fouling condition, operation that can be steady in a long-term, and measure it is accurate.Show to use by engineering practice and be somebody's turn to do
Device can accurately measure slurries area CaSO4Density, and according to online PH numerical value, during so as to accurately control plasma discharge
Between, improve the stability and reliability of desulfurizing tower system operation.Because the device belongs to independent measurement apparatus, installation site
Free variation can be needed according to field condition；The serum density under fluidised form can be measured, in the absence of slurries dead band, measurement accuracy
It is high；There is on-line rinsing simultaneously and rinse two kinds of pre-washing functions offline, can effectively avoid the fouling scene hair on meter probe surface
It is raw；Stainless steel, carbon steel line with rubber or other various materials can be used to make, selection is extensive.
Brief description of the drawings
Fig. 1 spray column traditional density meter instrumentation plans；
Fig. 2 is schematic device of the present utility model.
Wherein：1- pressure-measuring pipes, 2- return ducts, 3- inlet tubes, 4- outlets, 5- flow-limiting valves, 6- underflows valve, 7- inlet valves,
8- pressure taps, 9- backwash waters interface, 10-Ph meter interfaces
Embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of limestone-based process spray column slurry density measurement device, including pressure-measuring pipe 1, return duct 2, inlet tube 3, outlet
Pipe 4, flow-limiting valve 5, underflow valve 6, inlet valve 7, pressure tap 8, backwash water interface 9 and Ph meter interfaces 10；
The bottom connection outlet pipe 4 of pressure-measuring pipe 1, is provided with therebetween underflow valve 6；The one end of return duct 2 connects with outlet 4
Connect, the other end is arranged in the top sidewall of pressure-measuring pipe 1；Flow-limiting valve 5 is provided with return duct 2；Installed in the bottom sidewall of pressure-measuring pipe 1
There is inlet tube 3；The other end of inlet tube 3 is connected with spray column bottom sidewall；Inlet valve 7 is provided with the pipeline of inlet tube 3；Pressure-measuring pipe
Two pressure taps 8, backwash water interface 9 and Ph meter interfaces 10 are provided with 1 side wall；
The distance between described two pressure taps 8 are 500mm；The pressure tap 8 and the side wall shape of pressure-measuring pipe 1
Into angle；The angle is 60 °；
The common course of work：After device is fixedly connected with spray column, the slurries in spray column are entered by inlet tube 3 to be surveyed
Then pressure pipe 1 is flowed back in spray column by return duct 2 and outlet 4；
Backwash --- when having fouling in device
When a small amount of：Underflow valve 6 is opened, closes flow-limiting valve 5, is realized by spray column and the pressure difference of the present apparatus from backwash；
When measuring more：Underflow valve 6 and flow-limiting valve 5 are opened, by the external water under high pressure pipeline of backwash water interface 9, is backwashed；
The pressure-measuring pipe 1 of the device be a diameter DN250 stainless steel straight tube, length 2m.
The course of work：A kind of limestone-based process spray column slurry density measurement device, including the dress such as pressure-measuring pipe 1, return duct 2
Put composition.This device has abandoned the conventional mounting mode that densitometer is directly installed on spray column bottom, belongs to outside tower and installs, can mould
Block metaplasia is produced.Inlet tube 3 is connected with the mouth of pipe that bottom of towe bottom is reserved, outlet 4 can be directly discharged into absorption tower melt pit, then
Desulfurizing tower is returned by sump pump.It need to only open the inlet valve 7 of pressure-measuring pipe 1 during measurement, and by adjusting flow-limiting valve 5 to control pressure measurement
Slurry flow rate in pipe 1.By pressure-measuring pipe 1 and the liquid level difference in Desulfurization tower slurry area, slurries constantly flow into pressure-measuring pipe 1, pass through survey
Two differential manometers in pressure pipe 1, pressure differential is measured, but according to density formula and the height value of two pressure taps, passed through on DCS
Internal arithmetic, you can draw the density value for flowing through pressure-measuring pipe slurries.It is can control simultaneously by adjusting the aperture of flow-limiting valve 5 in pressure-measuring pipe
Slurry flow rate, ensure that the slurries in pressure-measuring pipe are in flow regime all the time, avoid the dead band at differential manometer pipe nipple.Increase current limliting
The aperture of valve 5 can instantaneously increase slurry flow rate in pressure-measuring pipe, play souring, can avoid CaSO in pressure-measuring pipe4Fouling, ensure to survey
Accuracy of measurement.High-pressure washing water can also be squeezed into by the backwash water interface 9 on pressure-measuring pipe 1 simultaneously, can thoroughly remove pressure-measuring pipe
Interior scale forming matter, and play a part of rinsing differential manometer probe and PH meter probes simultaneously.
Actual operating data is as follows：
。
Claims (5)
- A kind of 1. limestone-based process spray column slurry density measurement device, it is characterised in that：Including pressure-measuring pipe (1), return duct (2), Inlet tube (3), outlet (4), flow-limiting valve (5), underflow valve (6), inlet valve (7), pressure tap (8), backwash water interface (9) With Ph meter interfaces (10)；Pressure-measuring pipe (1) bottom connection outlet pipe (4), is provided with therebetween underflow valve (6)；Return duct (2) one end and outlet (4) connect, the other end is arranged in pressure-measuring pipe (1) top sidewall；Flow-limiting valve (5) is provided with return duct (2)；Pressure-measuring pipe (1) Inlet tube (3) is installed in bottom sidewall；Inlet tube (3) other end is connected with spray column bottom sidewall；On inlet tube (3) pipeline It is provided with inlet valve (7)；Two pressure taps (8), backwash water interface (9) and Ph meters are provided with the side wall of pressure-measuring pipe (1) Interface (10).
- A kind of 2. limestone-based process spray column slurry density measurement device as claimed in claim 1, it is characterised in that：It is described two The distance between pressure tap (8) is 500mm.
- A kind of 3. limestone-based process spray column slurry density measurement device as claimed in claim 1, it is characterised in that：The pressure Count interface (8) and form angle with pressure-measuring pipe (1) side wall.
- A kind of 4. limestone-based process spray column slurry density measurement device as claimed in claim 3, it is characterised in that：The angle For 60 °.
- 5. a kind of limestone-based process spray column slurry density measurement device as described in any one of Claims 1-4, its feature exist In：The pressure-measuring pipe (1) is a diameter of DN250 stainless steel straight tube, and its length is 2m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720134456.6U CN206787968U (en) | 2017-02-15 | 2017-02-15 | A kind of limestone-based process spray column slurry density measurement device |
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| CN201720134456.6U CN206787968U (en) | 2017-02-15 | 2017-02-15 | A kind of limestone-based process spray column slurry density measurement device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596332A (en) * | 2017-02-15 | 2017-04-26 | 北京北方节能环保有限公司 | Spray tower seriflux density measuring device by limestone method |
| CN108187477A (en) * | 2017-12-22 | 2018-06-22 | 重庆大学 | A kind of control method for improving string tower desulphurization system water balance dynamic characteristic |
| CN109142646A (en) * | 2018-10-23 | 2019-01-04 | 大唐滨州发电有限公司 | A kind of thermal power plant desulfuration absorbing tower pH meter automatic sampling detection device |
-
2017
- 2017-02-15 CN CN201720134456.6U patent/CN206787968U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596332A (en) * | 2017-02-15 | 2017-04-26 | 北京北方节能环保有限公司 | Spray tower seriflux density measuring device by limestone method |
| CN108187477A (en) * | 2017-12-22 | 2018-06-22 | 重庆大学 | A kind of control method for improving string tower desulphurization system water balance dynamic characteristic |
| CN108187477B (en) * | 2017-12-22 | 2020-12-11 | 重庆大学 | Control method for improving dynamic water balance characteristic of serial-tower desulfurization system |
| CN109142646A (en) * | 2018-10-23 | 2019-01-04 | 大唐滨州发电有限公司 | A kind of thermal power plant desulfuration absorbing tower pH meter automatic sampling detection device |
| CN109142646B (en) * | 2018-10-23 | 2021-04-23 | 大唐滨州发电有限公司 | Automatic sampling detection device of desulfurization absorption tower pH meter of thermal power factory |
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