CN221550553U - PH detection device for desulfurization absorption liquid - Google Patents
PH detection device for desulfurization absorption liquid Download PDFInfo
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- CN221550553U CN221550553U CN202323417679.8U CN202323417679U CN221550553U CN 221550553 U CN221550553 U CN 221550553U CN 202323417679 U CN202323417679 U CN 202323417679U CN 221550553 U CN221550553 U CN 221550553U
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- 238000001514 detection method Methods 0.000 title claims abstract description 89
- 239000007788 liquid Substances 0.000 title claims abstract description 80
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 29
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 29
- 230000023556 desulfurization Effects 0.000 title claims abstract description 29
- 238000004140 cleaning Methods 0.000 claims abstract description 81
- 238000005070 sampling Methods 0.000 claims abstract description 79
- 239000011521 glass Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 34
- 238000010992 reflux Methods 0.000 claims description 13
- 239000010865 sewage Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000000737 periodic effect Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 42
- 239000000523 sample Substances 0.000 abstract description 35
- 229910021529 ammonia Inorganic materials 0.000 abstract description 21
- 238000012423 maintenance Methods 0.000 abstract description 11
- 230000008021 deposition Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 10
- 238000007599 discharging Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000005299 abrasion Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 description 8
- 230000003009 desulfurizing effect Effects 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000011152 fibreglass Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of PH detection devices, in particular to a PH detection device for desulfurization absorption liquid. Technical problems: in the using process of the PH detection device, the sampling probe is arranged in the absorption liquid circulating pool, so that the measuring point is single; if the sampling point is arranged on the inlet or outlet pipeline of the circulating pump, the abrasion is serious, and if the sampling point is arranged on the wall of the tower, continuous discharging absorption liquid is adopted for measurement, and the mother liquid is required to be recovered. The technical scheme is as follows: a PH detection device for desulfurization absorption liquid. According to the utility model, the bottom sampling assembly is arranged to enable sampling liquid to enter from the bottom, and the side upper backflow assembly is utilized to backflow from the upper end; the detection sample liquid passes through the pressure difference and is downwards from bottom to top, so that the deposition of mud and ammonia scale can be prevented to the greatest extent; the online cleaning assembly can achieve the effects of online cleaning of the PH glass probe and the inner wall of the cavity, and the PH electrode fixing assembly can be rapidly pulled out to achieve the purposes of efficient maintenance and cleaning of the PH electrode probe.
Description
Technical Field
The utility model relates to the technical field of PH detection devices, in particular to a PH detection device for desulfurization absorption liquid.
Background
The wet flue gas (tail gas) ammonia desulfurization uses dilute ammonia water as a desulfurizing agent, and a byproduct ammonium sulfite semi-finished product or ammonium sulfate finished product is the flue gas (tail gas) desulfurization technology which is most widely applied in the industries of domestic coal chemical industry, combined alkali, sulfuric acid and the like at present. Along with the development of ammonia desulfurization technology, in order to reach the ultra-low emission standard, the ammonia desulfurization of flue gas (tail gas) mainly controls SO2 and ammonia to escape from the source to form aerosol, the pH value control of desulfurization absorption liquid in the production process is important, if the pH value is too high, the outlet clean flue gas is easy to form aerosol, and particulate matter exceeds the standard; if the pH value is too low, the desulfurization effect is not good. Therefore, a pH on-line detection device is adopted in a desulfurization system in an industrial device to monitor the absorption liquid in real time.
The existing general online measurement mode of the pH value of the desulfurization absorption liquid mainly comprises a direct method and a pumping method, wherein the direct method is to insert a glass electrode into the absorption liquid for measurement; the extraction method is to install a reflux device, and the absorption liquid level difference or the pressure difference is utilized to generate self-flow, so that the absorption liquid flows into the reflux device, then a glass electrode is inserted into the reflux device for measurement, and the following problems are mainly existed in the prior art desulfurization absorption liquid pH value measuring device: (1) The sampling probe is arranged in the absorption liquid circulating pool, the measuring point is single and is not representative, and the measuring value error is large; (2) The sampling point is arranged on an inlet or outlet pipeline of the circulating pump, so that the flow speed is too high, the abrasion is serious, and the maintenance is inconvenient; (3) The sampling point is arranged on the wall of the tower, and is used for measuring by adopting continuous discharging absorption liquid, and mother liquid recovery is needed.
Therefore, the PH detection device which can reduce the flow rate of the sampling liquid, avoid the abrasion of the PH meter electrode in the operation, simultaneously prevent the deposition of mud and ammonia scale to the greatest extent, and is convenient for the disassembly and cleaning, the maintenance and the online cleaning of the PH detection electrode is needed to meet the PH detection requirement of the desulfurization absorption liquid.
Disclosure of utility model
In order to overcome the defect that in the using process of the PH detection device, a sampling probe is arranged in an absorption liquid circulating pool, so that the measuring point is single; if the sampling point is arranged on the inlet or outlet pipeline of the circulating pump, the abrasion is serious, and if the sampling point is arranged on the wall of the tower, continuous discharging absorption liquid is adopted for measurement, and the mother liquid is required to be recovered.
The technical scheme of the utility model is as follows: the PH detection device for the desulfurization absorption liquid comprises a detection device body, a bottom sample injection assembly, a side upper part reflux assembly, an electrode fixing assembly, an online cleaning assembly and a rapid pollution discharge assembly; the bottom sampling assembly for sampling and detecting the desulfurization absorption liquid is arranged at the bottom of the detection device body; the upper part of the side end of the detection device body is provided with a side upper reflux component for carrying out reflux treatment on the sampling liquid; an electrode fixing assembly for disassembling and fixing the detection electrode is arranged at the top of the detection device body; the bottom of the side end of the detection device body is provided with an online cleaning component for online cleaning treatment of the electrode and the inner wall of the cavity of the detection device body; the bottom of the other side of the detection device body is provided with a rapid blowdown assembly for controlling periodic blowdown and cleaning and exhausting.
Preferably, the bottom sampling assembly is utilized to enable sampling liquid to enter from the bottom, the side upper backflow assembly is utilized to backflow from the upper end, the pressure difference of the sampling liquid is detected, and mud and ammonia scale deposition can be prevented to the greatest extent from bottom to top; the inlet pipe of the online cleaning assembly is tangentially arranged, and during online cleaning, cleaning liquid is favorable for disturbing the cleaning liquid in the detection device body from bottom to top, so that the effect of cleaning the PH glass probe and the inner wall of the cavity is achieved, and online periodic pollution discharge and cleaning can be realized by utilizing the rapid pollution discharge assembly; in the use process of the electrode, ammonia scale deposits are attached to the glass probe in different degrees, and the glass probe can be rapidly extracted by utilizing the electrode fixing assembly so as to be cleaned by using special chemical cleaning liquid.
Preferably, the detection device body cavity comprises a sealed sampling cavity, an upper sealing cover plate and a lower sealing cover plate; a sealed sampling cavity is formed in the detection device body; an upper sealing cover plate is fixedly connected to the top end inside the sealed sampling cavity; the bottom end inside the sealed sampling cavity is fixedly connected with a lower sealing cover plate, and the sealed sampling cavity, the upper sealing cover plate and the lower sealing cover plate are made of glass fiber reinforced plastic materials, so that the corrosion resistance of the detection device body is met; the diameter of the sealed sampling cavity is preferably 2-6 times, preferably 4 times, of the diameter of the sampling tube, and the flow rate of the sampling liquid in the cavity is ensured to be about 0.2 m/s.
Preferably, the bottom sample injection assembly comprises a first connecting short pipe, a first flange, a first control valve and a sample injection pipe; the upper end part of the lower sealing cover plate is provided with a first connecting short pipe; the lower end part of the lower sealing cover plate is provided with a first flange which is detachably connected with the first connecting short pipe; the end part of the first connecting short pipe is provided with a first control valve; the sampling pipe is installed at the lower end part of the first control valve, the first control valve is opened, and sampling liquid can enter the detection device body through the sampling pipe.
Preferably, the side upper return assembly comprises a second junction, a second control valve and a return line; a second short connecting pipe is arranged on the inner wall of the detection device body; the outer side of the second short connecting pipe is provided with a second control valve; and a return pipe is arranged on the outer side of the second control valve, the pressure difference of the sample liquid is detected, the sample liquid overflows from bottom to top, and the upper end of the return pipe is removed by lateral overflow, so that the deposition of mud and ammonia scale can be prevented to the greatest extent.
Preferably, the online cleaning assembly comprises a third short connecting pipe, a third control valve and a cleaning pipe; a third short connecting pipe is arranged at the bottom end of the inner wall of the detection device body; a third control valve is arranged on the outer side of the third connecting short pipe; and a cleaning pipe is arranged outside the third control valve. In order to ensure accurate data of the PH on-line detection device, the PH glass electrode and the inner wall of the cavity of the detection device body are cleaned on line at regular intervals by closing the first control valve and opening the third control valve, and the cleaning pressure of the cleaning liquid is ensured during on-line cleaning, preferably 0.2-0.4 MPa.
Preferably, the rapid sewage draining assembly comprises a fourth short connecting pipe, a fourth control valve and a sewage draining pipe; a fourth short connecting pipe which is arranged corresponding to the third short connecting pipe is arranged at the bottom end of the inner wall of the detection device body; a fourth control valve is arranged on the outer side of the fourth connecting short pipe; and a sewage discharge pipe is arranged on the outer side of the fourth control valve, and when sewage is discharged on line and cleaned, the fourth control valve is opened, so that sewage can be discharged through the sewage discharge pipe rapidly.
Preferably, the electrode fixing assembly comprises a fifth junction pipe, a fifth flange, a detachable flange cover, a threaded connecting sleeve and a PH glass electrode; a fifth short connecting pipe is fixedly arranged at the center of the upper end of the upper sealing cover plate; a fifth flange is arranged at the upper end part of the fifth connecting short pipe; the upper end part of the fifth flange is provided with a detachable flange cover connected through bolts; the outer side of the detachable flange cover is in threaded connection with a threaded connecting sleeve; PH glass electrodes are arranged on the inner sides of the threaded connecting sleeves in a penetrating manner, and the insertion depth of the PH glass electrodes is proper when the glass probe reaches or exceeds the central position of the sealed sampling cavity; the PH online detection data is transmitted to a control device through a conversion transmission device and is used as a signal source for controlling the adding amount of the desulfurizing agent of the desulfurizing absorption liquid; in the PH glass electrode use process, ammonia scale deposits are attached to the glass probe in different degrees, free disassembly and assembly can be realized through the fifth flange, the detachable flange cover and the threaded connecting sleeve, and the special chemical cleaning liquid can be quickly used for cleaning, and meanwhile, the effect of quick maintenance can be achieved.
The utility model has the beneficial effects that:
1. The bottom sampling assembly is utilized to enable sampling liquid to enter from the bottom, the side upper backflow assembly is utilized to backflow from the upper end, the pressure difference of the sampling liquid is detected, and mud and ammonia scale deposition can be prevented to the greatest extent; when in online cleaning, the online cleaning component is utilized to enable the cleaning liquid to be from bottom to top, so that the effect of cleaning the PH glass probe and the inner wall of the cavity is achieved, and the rapid pollution discharge component is utilized to realize online pollution discharge and cleaning; finally, the electrode fixing assembly is utilized to realize the functions of quickly overhauling the detachable PH glass electrode and independently cleaning the glass probe. Compared with the prior PH detection device, the PH detection device can have the advantages that the measuring point is single, if the sampling point is arranged on the inlet or outlet pipeline of the circulating pump, the abrasion is serious, and if the sampling point is arranged on the wall of the tower, the continuous discharging absorption liquid is adopted for measurement, and the mother liquid is required to be recovered;
2. The sealing sampling cavity, the upper sealing cover plate and the lower sealing cover plate are all made of glass fiber reinforced plastic materials, so that the corrosion resistance of the detection device body is met, the diameter of the sealing sampling cavity is preferably 2-6 times, preferably 4 times, of the diameter of the sampling tube, and the flow rate of sampling liquid in the cavity is ensured to be about 0.2 m/s;
3. The sampling liquid can enter the detection device body through the sampling pipe, the detection sample liquid passes through the pressure difference from bottom to top, and the upper end side overflows to remove the return pipe, so that the deposition of mud and ammonia scale can be prevented to the greatest extent;
4. In the PH glass electrode use process, ammonia scale deposits are attached to the glass probe in different degrees, free disassembly and assembly can be realized through the fifth flange, the detachable flange cover and the threaded connecting sleeve, and the special chemical cleaning liquid can be quickly used for cleaning, and meanwhile, the effect of quick maintenance can be achieved.
Drawings
FIG. 1 is a schematic perspective view showing a PH detecting device according to the present utility model;
FIG. 2 is a schematic view showing the internal perspective structure of the detecting unit body of the PH detecting unit according to the present utility model;
FIG. 3 is a schematic perspective view showing a bottom sampling assembly of the PH detection device according to the present utility model;
FIG. 4 is a schematic view showing a disassembled perspective view of an electrode fixing assembly of the PH detecting device according to the present utility model.
Reference numerals illustrate: 1. a detection device body; 2. a bottom sample injection assembly; 3. a side upper reflow assembly; 4. an electrode fixing assembly; 5. an online cleaning assembly; 6. a rapid blowdown assembly; 101. sealing the sampling cavity; 102. an upper sealing cover plate; 103. a lower sealing cover plate; 201. a first connecting stub; 202. a first flange; 203. a first control valve; 204. a sampling tube; 301. a second junction; 302. a second flange; 303. a second control valve; 304. a return pipe; 401. a fifth junction; 402. a fifth flange; 403. a detachable flange cover; 404. a thread connecting sleeve; 405. a PH glass electrode; 501. a third junction; 502. a third flange; 503. a third control valve; 504. cleaning the tube; 601. a fourth junction; 602. a fourth flange; 603. a fourth control valve; 604. and a blow-down pipe.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
Referring to fig. 1-2, the present utility model provides an embodiment: the utility model provides a desulfurization absorption liquid PH detection device, includes detection device body 1, bottom advance the subassembly 2, side upper portion backward flow subassembly 3, electrode fixing subassembly 4, online cleaning subassembly 5, quick blowdown subassembly 6. The bottom sampling assembly 2 for sampling and detecting the desulfurization absorption liquid is arranged at the bottom of the detection device body 1; a side upper reflux component 3 for carrying out reflux treatment on the sampling liquid is arranged at the upper part of the side end of the detection device body 1; an electrode fixing component 4 for disassembling and fixing the detection electrode is arranged on the top of the detection device body 1; the bottom of the side end of the detection device body 1 is provided with an online cleaning component 5 for online cleaning treatment of the electrode and the inner wall of the cavity of the detection device body 1; the bottom of the other side of the detection device body 1 is provided with a rapid blowdown assembly 6 for controlling periodic blowdown and cleaning and exhausting. The bottom sampling assembly 2 can be used for allowing sampling liquid to enter from the bottom, the side upper backflow assembly 3 is used for backflow from the upper end, the pressure difference of the sampling liquid is detected, and mud and ammonia scale deposition can be prevented to the greatest extent from bottom to top; the inlet pipe of the online cleaning component 5 is tangentially arranged, and when online cleaning is performed, cleaning liquid is favorable for disturbing the cleaning liquid in the detection device body 1 from bottom to top, so that the effect of cleaning the PH glass probe and the inner wall of the cavity is achieved; the quick sewage discharging assembly 6 can realize online sewage discharging and cleaning; in the use process of the electrode, ammonia scale deposits are attached to the PH electrode glass probe in different degrees, and the PH electrode glass probe can be rapidly extracted by utilizing the electrode fixing assembly 4 so as to be cleaned by using special chemical cleaning liquid. The cavity of the detection device body 1 comprises a sealed sampling cavity 101, an upper sealing cover plate 102 and a lower sealing cover plate 103; a sealed sampling cavity 101 is formed in the detection device body 1; an upper sealing cover plate 102 is fixedly connected to the top end inside the sealed sampling cavity 101; the lower sealing cover plate 103 is fixedly connected to the bottom end inside the sealing sampling cavity 101, and the sealing sampling cavity 101, the upper sealing cover plate 102 and the lower sealing cover plate 103 are made of glass fiber reinforced plastics, so that the corrosion resistance of the detection device body 1 is met. The diameter of the sealed sampling cavity 101 is preferably 2-6 times, preferably 4 times, of the diameter of the sampling tube, so that the flow rate of the sampling liquid in the cavity is ensured to be about 0.2 m/s; the side upper return assembly 3 comprises a second junction pipe 301, a second control valve 303 and a return pipe 304; a second short connecting pipe 301 is arranged on the inner wall of the detection device body 1; a second control valve 303 is arranged outside the second connecting short pipe 301; the outer side of the second control valve 303 is provided with a return pipe 304, the detection sample liquid passes through the pressure difference from bottom to top, and the upper end side overflows to remove the return pipe 304, so that the deposition of mud and ammonia scale can be prevented to the greatest extent; the side upper reflow assembly 3 can be directly welded on the detection device body 1 in a welding mode, so that the detection device is more stable and safer; in addition, the side upper reflux assembly 3 also comprises a second flange 302, and can be detachably arranged on the outer wall of the detection device body 1 through the second flange 302, so that the design is convenient for maintenance and overhaul;
The online cleaning component 5 comprises a third short connecting pipe 501, a third control valve 503 and a cleaning pipe 504; a third short connecting pipe 501 is arranged at the bottom end of the inner wall of the detection device body 1; a third control valve 503 is arranged outside the third connecting short pipe 501; a cleaning pipe 504 is installed outside the third control valve 503. In order to ensure accurate data of the PH online detection device, the PH glass electrode 405 and the inner wall of the cavity of the detection device body 1 can be cleaned online regularly by closing the first control valve 203 and opening the third control valve 503, and the cleaning pressure of the cleaning liquid is ensured during online cleaning, preferably 0.2-0.4 MPa; the online cleaning component 5 can be fixedly arranged on the detection device body 1 in a welding mode, and in addition, a third flange 502 can also be arranged, and the online cleaning component 5 is detachably arranged at the bottom end of the side part of the outer wall of the detection device body 1 through the third flange 502, so that later maintenance and overhaul are facilitated.
The rapid sewage draining assembly 6 comprises a fourth short connecting pipe 601, a fourth control valve 603 and a sewage draining pipe 604; a fourth short connecting pipe 601 which is arranged corresponding to the third short connecting pipe 501 is arranged at the bottom end of the inner wall of the detection device body 1; a fourth control valve 603 is arranged outside the fourth connecting short pipe 601; a drain pipe 604 is installed outside the fourth control valve 603, and after the cleaning is completed, the fourth control valve 603 is opened, so that sewage can be rapidly discharged through the drain pipe 604. The quick blowdown subassembly 6 can be through welded mode fixed mounting on detection device body 1, also can set up fourth flange 602 in addition, and quick blowdown subassembly 6 is installed in detection device body 1 outer wall lateral part bottom through fourth flange 602 with detachable mode, and later maintenance, the maintenance of being convenient for.
Referring to fig. 3, in the present embodiment, the bottom sampling assembly 2 includes a first connecting pipe 201, a first flange 202, a first control valve 203, and a sampling pipe 204; the upper end part of the lower sealing cover plate 103 is provided with a first connecting short pipe 201; the lower end part of the lower sealing cover plate 103 is provided with a first flange 202 which is detachably connected with the first connecting short pipe 201; the end of the first connecting short pipe 201 is provided with a first control valve 203; a sampling tube 204 is mounted at the lower end of the first control valve 203.
Referring to fig. 4, in the present embodiment, the electrode fixing assembly 4 includes a fifth connecting pipe 401, a fifth flange 402, a detachable flange cover 403, a screw connection sleeve 404 and a PH glass electrode 405; a fifth short connecting pipe 401 is fixedly arranged at the center of the upper end of the upper sealing cover plate 102; the upper end of the fifth junction 401 is provided with a fifth flange 402; the upper end of the fifth flange 402 is provided with a detachable flange cover 403 connected by bolts; the outer side of the detachable flange cover 403 is connected with a thread connecting sleeve 404 through threads; the PH glass electrode 405 is installed in the inner side of the screw connection sleeve 404 in a penetrating way, the insertion depth of the PH glass electrode 405 is suitable for the glass probe to reach or exceed the central position of the sealed sampling cavity 101, PH online detection data are transmitted to the control device through the conversion transmission device and used as a signal source for controlling the addition amount of the desulfurization absorbing liquid desulfurizing agent, ammonia scale deposits are attached to the glass probe in different degrees in the using process of the PH glass electrode 405, free disassembly and assembly can be realized through the fifth flange 402, the detachable flange cover 403 and the screw connection sleeve 404, special chemical cleaning liquid can be rapidly used for cleaning, and meanwhile, the effect of rapid maintenance can be achieved.
When the device works, the first control valve 203 is opened, sampling liquid can enter the detection device body 1 through the sampling pipe 204, the detection sample liquid passes through the pressure difference and overflows from bottom to top and the upper end side direction to remove the return pipe 304, so that the deposition of mud and ammonia scale can be prevented to the greatest extent;
The insertion depth of the PH glass electrode 405 is preferably that the glass probe reaches or exceeds the central position of the sealed sampling cavity 101, PH online detection data is transmitted to the control device through the conversion transmission device and used as a signal source for controlling the addition amount of the desulfurization absorbing liquid desulfurizing agent, ammonia scale deposits are attached to the glass probe in different degrees in the using process of the PH glass electrode 405, free disassembly and assembly can be realized through the fifth flange 402, the detachable flange cover 403 and the threaded connecting sleeve 404, the special chemical cleaning liquid can be rapidly used for cleaning, and meanwhile, the effect of rapid maintenance can be achieved;
In order to ensure accurate data of the PH online detection device, the first control valve 203 is closed, namely the sampling inlet is closed, the third control valve 503 is opened, the cleaning inlet is opened, cleaning liquid is introduced to regularly clean the PH glass electrode 405 and the inner wall of the cavity of the detection device body 1 online, the cleaning pressure of the cleaning liquid is ensured to be preferably 0.2-0.4MPa during online cleaning, and then the cleaning liquid flows back through the return pipe 304;
The fourth control valve 603 is opened, so that online pollution discharge, cleaning and cleaning can be realized through the pollution discharge pipe 604.
Through the steps, the bottom sample injection assembly 2 can be used for allowing sampling liquid to enter from the bottom, the side upper backflow assembly 3 is used for backflow from the upper end, the pressure difference of the sampling liquid is detected, and mud and ammonia scale deposition can be prevented to the greatest extent from bottom to top; the inlet pipe of the online cleaning component 5 is tangentially arranged, and cleaning liquid is favorable for cleaning the cleaning liquid in the disturbance detection device body 1 from bottom to top during online cleaning, so that the effects of cleaning the PH glass probe and the inner wall of the cavity are achieved, and online pollution discharge and cleaning can be realized by utilizing the rapid pollution discharge component 6. In the use process of the electrode, ammonia scale deposits are attached to the glass probe in different degrees, and the glass probe can be rapidly extracted by utilizing the electrode fixing assembly 4 so as to be cleaned by using special chemical cleaning liquid.
The above embodiment can solve the problem that the measuring point is single because the sampling probe is arranged in the absorption liquid circulating pool in the using process of the PH detection device; if the sampling point is arranged on the inlet or outlet pipeline of the circulating pump, the abrasion is serious, and if the sampling point is arranged on the wall of the tower, continuous discharging absorption liquid is adopted for measurement, and the mother liquid is required to be recovered.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.
Claims (7)
1. The PH detection device of the desulfurization absorption liquid comprises a detection device body (1); the method is characterized in that: the device also comprises a bottom sample injection assembly (2), a side upper part backflow assembly (3), an electrode fixing assembly (4), an online cleaning assembly (5) and a rapid pollution discharge assembly (6); the bottom sampling assembly (2) for sampling and detecting the desulfurization absorption liquid is arranged at the bottom of the detection device body (1); a side upper reflux component (3) for refluxing the sampling liquid is arranged at the upper part of the side end of the detection device body (1); an electrode fixing assembly (4) for fixing and dismounting the detection electrode is arranged at the top of the detection device body (1); an online cleaning component (5) for online cleaning the inner wall of the cavity of the detection device body (1) is arranged at the bottom of the side end of the detection device body (1); the bottom of the other side of the detection device body (1) is provided with a rapid blowdown assembly (6) for controlling periodic blowdown and cleaning and exhausting.
2. The desulfurization absorbing solution PH detecting apparatus according to claim 1, wherein: the cavity of the detection device body (1) comprises a sealed sampling cavity (101), an upper sealing cover plate (102) and a lower sealing cover plate (103); a sealed sampling cavity (101) is formed in the detection device body (1); an upper sealing cover plate (102) is fixedly connected to the top end inside the sealed sampling cavity (101); the bottom end inside the sealed sampling cavity (101) is fixedly connected with a lower sealing cover plate (103).
3. The desulfurization absorbing solution PH detecting apparatus according to claim 1, wherein: the bottom sample injection assembly (2) comprises a first connecting short pipe (201), a first flange (202), a first control valve (203) and a sample injection pipe (204); the upper end part of the lower sealing cover plate (103) is provided with a first connecting short pipe (201); a first flange (202) which can be assembled and disassembled with the first connecting short pipe (201) is arranged at the lower end part of the lower sealing cover plate (103); the end part of the first connecting short pipe (201) is provided with a first control valve (203);
A sampling tube (204) is arranged at the lower end part of the first control valve (203).
4. The desulfurization absorbing solution PH detecting apparatus according to claim 1, wherein: the side upper reflux assembly (3) comprises a second short connecting pipe (301), a second control valve (303) and a reflux pipe (304); a second short connecting pipe (301) is arranged on the inner wall of the detection device body (1); a second control valve (303) is arranged outside the second connecting short pipe (301); and a return pipe (304) is arranged outside the second control valve (303).
5. The desulfurization absorbing solution PH detecting apparatus according to claim 1, wherein: the online cleaning component (5) comprises a third short connecting pipe (501), a third control valve (503) and a cleaning pipe (504); a third short connecting pipe (501) is arranged at the bottom end of the inner wall of the detection device body (1); a third control valve (503) is arranged outside the third connecting short pipe (501); a cleaning pipe (504) is arranged outside the third control valve (503).
6. The desulfurization absorbing solution PH detecting apparatus according to claim 5, wherein: the rapid sewage disposal assembly (6) comprises a fourth short connecting pipe (601), a fourth control valve (603) and a sewage disposal pipe (604); a fourth short connecting pipe (601) which is arranged corresponding to the third short connecting pipe (501) is arranged at the bottom end of the inner wall of the detection device body (1); a fourth control valve (603) is arranged outside the fourth connecting short pipe (601); a drain pipe (604) is arranged outside the fourth control valve (603).
7. The desulfurization absorbing solution PH detecting apparatus according to claim 2, wherein: the electrode fixing assembly (4) comprises a fifth short connecting pipe (401), a fifth flange (402), a detachable flange cover (403), a threaded connecting sleeve (404) and a PH glass electrode (405); a fifth short connecting pipe (401) is fixedly arranged at the center of the upper end of the upper sealing cover plate (102); a fifth flange (402) is arranged at the upper end part of the fifth connecting short pipe (401); the upper end part of the fifth flange (402) is provided with a detachable flange cover (403) connected by bolts; the outer side of the detachable flange cover (403) is connected with a thread connecting sleeve (404) through threads;
the PH glass electrode (405) is installed inside the thread connecting sleeve (404) in a penetrating way.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202323417679.8U CN221550553U (en) | 2023-12-14 | 2023-12-14 | PH detection device for desulfurization absorption liquid |
Applications Claiming Priority (1)
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