CN215656876U - Oxidation tuber pipe anti-clogging device of coal-fired flue gas wet flue gas desulfurization system - Google Patents
Oxidation tuber pipe anti-clogging device of coal-fired flue gas wet flue gas desulfurization system Download PDFInfo
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- CN215656876U CN215656876U CN202121437119.7U CN202121437119U CN215656876U CN 215656876 U CN215656876 U CN 215656876U CN 202121437119 U CN202121437119 U CN 202121437119U CN 215656876 U CN215656876 U CN 215656876U
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- 230000003647 oxidation Effects 0.000 title claims abstract description 107
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 107
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000003546 flue gas Substances 0.000 title claims abstract description 41
- 238000006477 desulfuration reaction Methods 0.000 title abstract description 34
- 230000023556 desulfurization Effects 0.000 title abstract description 34
- 239000000725 suspension Substances 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000005507 spraying Methods 0.000 claims abstract description 22
- 239000007921 spray Substances 0.000 claims abstract description 18
- 230000005484 gravity Effects 0.000 claims abstract description 15
- 230000001590 oxidative effect Effects 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000013049 sediment Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 18
- 230000008569 process Effects 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000003009 desulfurizing effect Effects 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 241001415288 Coccidae Species 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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Abstract
The invention discloses an anti-clogging device for an oxidation air pipe of a coal-fired flue gas wet desulphurization system, which comprises a gravity suspension descaling system and a high-pressure water spraying descaling system. The gravity suspension descaling system comprises a suspension device, a suspension wire, a pulley and a wire take-up device, and the high-pressure water spray descaling system comprises a nozzle, a spray pipe and an introduction sleeve. According to the invention, by combining the gravity suspension descaling system and the high-pressure water spray descaling system, soft sediments and crystalline hard scale can be simultaneously removed, the blockage phenomenon of an oxidation air pipe of a desulfurization system is effectively avoided, and the consequences of the rise of energy consumption, surging and the like of an oxidation fan are further avoided. The invention realizes the removal of the crystalline hard scale without stopping the machine, has simple operation and maintenance of the device, and provides sufficient guarantee for improving the operation stability of the desulfurization system and reducing the energy consumption of the desulfurization system.
Description
Technical Field
The invention relates to the technical field of control of atmospheric pollutants discharged by coal-fired boilers, in particular to an anti-blocking device for an oxidation air pipe of a coal-fired flue gas wet desulphurization system. The device is a device which is used for removing scale on the inner wall of an oxidation air pipe of a wet desulphurization system and solving the problems of abnormal operation of the desulphurization system and the like caused by blockage of the oxidation air pipe under the condition that a unit normally works without shutdown by adopting a mode of combining high-pressure flushing water and mechanical descaling.
Background
At present, the environmental problem is more and more emphasized, the combustion of fossil fuel is an important source of atmospheric pollutants, and the method is particularly important for implementing strict measures for preventing and treating the atmospheric pollution as a coal-fired power plant occupying half-wall rivers and mountains in China due to the coal consumption. The coal-fired power plant in China has basically completed the transformation work of ultra-low emission at present, and has implemented the most strict atmospheric pollutant emission standard internationally. However, the strictness of emission standards also puts more pressure on the operation and management of pollution abatement facilities in coal-fired power plants.
The limestone-gypsum wet flue gas desulfurization process is the most widely applied and mature desulfurization process technology at present, and the limestone-gypsum wet flue gas desulfurization process has higher desulfurization efficiency, so the limestone-gypsum wet flue gas desulfurization process is mostly adopted in ultralow emission modification of coal-fired power plants. However, the wet flue gas desulfurization technique also has many problems in the practical operation process. During the shutdown maintenance process of some units with low desulfurization efficiency, the phenomenon that a part of the desulfurization tower is seriously blocked by an oxidation air pipe is found, so that the normal chemical reaction in the desulfurization tower is blocked, and the desulfurization efficiency is always maintained at a lower level.
The blockage phenomenon of the oxidation air pipe mainly occurs near the outlet of the oxidation air pipe, and the main reason for the blockage phenomenon is that under the sweeping action of the oxidation air, the contact surface of the oxidation air pipe and the absorption liquid of the desulfurization tower is in a reciprocating fluctuation state, part of the absorption liquid can be adhered to the inner wall of the oxidation air pipe, and water is evaporated in the oxidation air and oxidized into gypsum to form hard scale. Under the long-term accumulation, the thickness of hard scale deposit increases gradually, blocks up the oxidation tuber pipe almost completely, causes the oxidation wind flow not enough, influences the desulfurization efficiency of desulfurizing tower.
At present, most of the oxidation air pipes of the desulfurization system adopt a method of spraying temperature-reducing water, the temperature of the oxidation air is reduced, and meanwhile, the blockage of the oxidation air pipes is relieved, however, the problem that the oxidation air pipes are blocked cannot be solved by the method. In addition, the oxidation air pipes of individual desulfurization systems are descaled by adopting a high-pressure water washing method, and although the method has a good descaling effect on loose scale, the descaling effect is still poor on hard scale, and accumulation and thickening of the hard scale cannot be prevented. Therefore, a device capable of effectively preventing the oxidation air pipe of the desulfurization system from being blocked is developed, and the device has important significance for the normal and stable operation of the desulfurization system.
The patent with the application number of CN202011290956.1 discloses a washing and purging system for an oxidation air pipe of an absorption tower and a working method. When the invention finds that the oxidation air pipe is blocked by scale and needs to be washed, the valve of the washing water pipe is opened to finish the washing of the oxidation air pipe, and the washing water can be pressurized, thereby being more beneficial to removing the blocking object. In addition, the system can be used for washing when the unit is shut down, and can also be used for washing when the unit runs, so that the unit is prevented from being shut down and overhauled due to blockage of the oxidation air pipe. However, this system does not provide effective removal of the hard scale produced inside the oxidation ductwork.
The application number is CN 201721747072.8's patent discloses a wet flue gas desulfurization absorption tower oxidation tuber pipe anti-clogging device, including oxidation fan, the female pipe of oxidation wind, oxidation wind branch pipe, the absorption tower, reduce temperature water pipe and technology water pipe, oxidation fan passes through the female pipe of oxidation wind and oxidation wind branch pipe intercommunication absorption tower, the technology water pipe is through reducing the temperature water pipe intercommunication oxidation wind female pipe, be provided with the scale removal water branch pipe in the oxidation wind branch pipe of the female pipe below of oxidation wind, the end of scale removal water branch pipe is provided with the spout, the scale removal water branch pipe passes through scale removal water female pipe intercommunication technology water pipe. However, this system does not provide good removal of the hard scale generated inside the oxidation hood.
The application number is CN20166551. X discloses a stifled device is blown to oxidation tuber pipe, including the compression tuber pipe, blow stifled tuber pipe, oxidation air mother's pipe, oxidation tuber pipe, butterfly valve I and butterfly valve II, the online clearance has been realized to the oxidation tuber pipe, has thoroughly solved and has blockked up the back and need shut down whole desulfurization system to the oxidation tuber pipe, carries out the problem of manual mediation to the oxidation tuber pipe again. But the invention adopts an air purging mode, and has poor purging effect on scale.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the anti-clogging device for the oxidation air pipe of the coal-fired flue gas wet desulphurization system is provided for solving the defect that the anti-clogging device for the oxidation air pipe of the wet desulphurization absorption tower in the prior art is removing formed hard scale.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an anti-clogging device for an oxidation air pipe of a coal-fired flue gas wet desulphurization system comprises a gravity suspension descaling system; the gravity suspension descaling system comprises a suspension line, a suspension line and a wire take-up device, wherein the suspension line is connected with the suspension line so that the suspension line is suspended above the vertical section of the oxidation air pipe, the suspension line is connected with the wire take-up device, the suspension line can be controlled by the wire pay-off or take-up action of the wire take-up device to lift, the suspension line is used for scraping hard scale on the inner wall of the oxidation air pipe, and the suspension width is matched with the inner diameter of the inner wall of the oxidation air pipe.
Preferably, the anti-clogging device for the oxidation air pipe of the coal-fired flue gas wet desulphurization system further comprises a high-pressure water-spraying descaling system, wherein the high-pressure water-spraying descaling system is used for spraying water to the inner wall of the oxidation air pipe for descaling, and comprises a nozzle and a spray pipe, and the spray pipe is connected with the nozzle and used for supplying water to the nozzle.
Preferably, the anti-clogging device for the oxidation air pipe of the coal-fired flue gas wet desulphurization system is further provided with an introduction sleeve, the lower end of the introduction sleeve is connected to the upper end of the vertical section of the oxidation air pipe, and the suspension wire, the spray pipe and the nozzle are arranged inside the introduction sleeve.
Preferably, according to the anti-blocking device for the oxidation air pipe of the coal-fired flue gas wet desulphurization system, the introduction sleeve is L-shaped; the corner of the leading-in sleeve is provided with a pulley, the lower end of the suspension wire is connected with the suspension wire, and the upper end of the suspension wire bypasses the pulley and extends to the horizontal direction to be connected with the take-up device.
Preferably, according to the anti-clogging device for the oxidation air pipe of the coal-fired flue gas wet desulphurization system, the introducing sleeve and the oxidation air pipe are integrally connected, and a T-shaped tee pipe structure is arranged at the joint of the introducing sleeve and the oxidation air pipe.
Preferably, the anti-clogging device for the oxidation air pipe of the coal-fired flue gas wet desulphurization system is formed by machining and molding the suspension high-chromium cast iron material and has a multi-arm cross structure with supporting legs.
Preferably, the number of the support legs is 4.
A use method of an oxidation air pipe anti-clogging device of a coal-fired flue gas wet desulphurization system comprises the following steps:
the anti-clogging device of the oxidation air pipe of the coal-fired flue gas wet desulphurization system is arranged above the vertical section of the oxidation air pipe, and the upper end of the vertical section of the oxidation air pipe is provided with an opening for the suspension and the water flow of the high-pressure water-spraying descaling system to pass;
and starting the high-pressure water spraying descaling system and the gravity suspension descaling system at a specific period to remove soft scale and hard scale accumulated on the inner wall surface of the oxidation air duct.
Preferably, in the application method of the oxidation air pipe anti-clogging device of the coal-fired flue gas wet desulphurization system, the high-pressure water spraying descaling system sprays water once every 1-4 hours, and the water spraying pressure is 5-8 MPa, so that soft scale accumulated on the inner wall surface of the oxidation air pipe is removed.
Preferably, in the application method of the oxidation air pipe anti-blocking device of the coal-fired flue gas wet desulphurization system, the gravity suspension descaling system works 1-3 times every day, and the suspension free falling body reciprocates 5-15 times in each working period so as to remove hard scale accumulated on the inner wall surface of the oxidation air pipe.
The invention has the beneficial effects that:
1. the invention can simultaneously remove soft sediments and crystalline hard scale by combining the gravity suspension descaling system and the high-pressure water-spraying descaling system, effectively avoids the blockage phenomenon of the oxidation air pipe of the desulfurization system, and has better descaling effect compared with the existing descaling device.
2. The invention fundamentally prevents the blockage of the oxidation air pipe of the desulfurization system, thereby avoiding the consequences of the rise of the energy consumption of the oxidation fan, the surge and the like, and providing sufficient guarantee for improving the operation stability of the desulfurization system and reducing the energy consumption of the desulfurization system.
3. The invention avoids the defect that the crystallization hard scale of the oxidation air duct of the desulfurization system can be effectively removed only by means of shutdown maintenance after the crystallization hard scale is generated, realizes the removal of the crystallization hard scale without shutdown, and has simple operation and maintenance of the device.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
FIG. 1 is a schematic structural diagram of an oxidation air pipe anti-clogging device of a coal-fired flue gas wet desulphurization system according to an embodiment of the present application;
fig. 2 is a schematic view of an overhang structure according to an embodiment of the present application.
The reference numbers in the figures are:
1 lead-in sleeve
2 suspension wire
3 spray pipe
4 desulfurizing tower
5 oxidizing air pipe inlet
6 pulley
7 overhang
8 spray nozzle
And 9, oxidizing the air pipe.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in FIG. 1, the anti-clogging device for the oxidation air pipe of the coal-fired flue gas wet desulphurization system comprises a gravity suspension descaling system and a high-pressure water spray descaling system; the gravity suspension descaling system comprises a suspension 7, a suspension wire 2 and a wire take-up device. Specifically, as shown in fig. 1, the oxidizing air duct 9 is L-shaped, and includes a horizontal section and a vertical section, one end of an oxidizing air duct inlet 5 of the horizontal section is connected to one side of the desulfurizing tower 4, and an opening is provided at the upper end of the vertical section of the oxidizing air duct 9, and the opening is used for allowing the suspension 7 to pass through and for allowing the water flow of the high-pressure water-spraying descaling system to pass through. The overhangs 7 are connected by means of suspension wires 2 such that the overhangs 7 are suspended above the vertical section of the oxidizing ductwork 9. The suspension wire 2 is connected with the wire take-up device, the lifting of the suspension 7 is controlled through the wire paying-off or wire taking-up action of the wire take-up device, the suspension 7 can scrape off hard scale on the inner wall after entering the oxidation air pipe 9, and the width of the suspension 7 is matched with the inner diameter of the inner wall of the oxidation air pipe 9.
Preferably, the high-pressure water-spraying descaling system in the embodiment comprises a nozzle 8 and a spray pipe 3, wherein the nozzle 8 is arranged above the opening, and the spray pipe 3 is connected with the nozzle 8 and is used for supplying water to the nozzle 8.
Preferably, the anti-clogging device for the oxidation air duct of the coal-fired flue gas wet desulphurization system of the embodiment is further provided with an introduction sleeve 1, the lower end of the introduction sleeve 1 is connected with the upper end of the vertical section of the oxidation air duct 9, and the suspension 7, the suspension wire 2, the spray pipe 3 and the nozzle 8 are arranged inside the introduction sleeve 1. The lead-in sleeve 1 protects the various components and has a guiding effect on the overhang 7.
Preferably, the introducing casing 1 in the embodiment is arranged in an L shape, and the upper end of the introducing casing is connected with one side of the desulfurizing tower 4; the pulley 6 is arranged at the corner of the leading-in sleeve 1, the lower end of the suspension wire 2 is connected with the suspension 7, and the upper end of the suspension wire is wound around the pulley 6, extends to the horizontal direction and is connected with the take-up device.
Preferably, in this embodiment, the introducing casing 1 and the oxidizing air duct 9 are integrally connected, and as shown in fig. 1, a T-shaped three-way pipe structure is arranged at the connection position of the introducing casing 1 and the oxidizing air duct 9.
The oxidation air pipe anti-clogging device of the coal-fired flue gas wet desulphurization system of the embodiment has the following specific working process: the high-pressure water spraying descaling system sprays water once every 1-4 hours, the water spraying pressure is 5-8 MPa, and the high-pressure water spraying descaling system is used for removing soft scale accumulated on the inner wall surface of the oxidation air duct 9. The gravity suspension descaling system works 1-3 times every day, and the suspension 7 free falling bodies reciprocate 5-15 times in each working period so as to remove hard scale accumulated on the inner wall surface of the oxidation air duct 9. The take-up device has a quick pay-off function and can enable the suspension 7 to complete free falling. The vertical movement range of the suspension 7 is from the lowest point of the suspension 7 to the lowest point of the nozzle 8, to the lowest point of the suspension 7 to the highest point of the outlet section of the oxidation air duct 9.
Example 1
A600 MW unit desulfurization system of a certain coal-fired power plant is upgraded, an introduction sleeve is additionally arranged above an oxidation air pipe in an original desulfurization tower, and a gravity suspension descaling system and a high-pressure water spraying descaling system are installed. Setting a high-pressure water spraying descaling system to spray water once every 2 hours, wherein the water spraying pressure is 5 MPa. The gravity suspension descaling system is set to work 2 times a day, and the suspension free-fall body reciprocates 10 times during each work. The suspension is made of high-chromium cast iron material and is shaped into a multi-arm cross-belt supporting leg structure as shown in figure 2, and the number of the supporting legs is 4.
In order to verify the actual working performance of the oxidation air pipe anti-blocking device of the coal-fired flue gas wet desulphurization system after modification, the running states of the oxidation air pipe devices of the desulphurization system before and after modification are compared under the maximum 100% rated load of flue gas volume, the test data adopts the monitoring data of the unit when being started and normally running for one month, and the specific results are shown in table 1.
Table 1 example 1 operating parameters of an oxidizing air device of a desulfurization system
| Item | Before transformation | After transformation |
| load/MW of unit | 600 | 600 |
| Flue gas flow rate/. times.104m3 | 196.4 | 198.3 |
| Concentration of sulfur dioxide in raw flue gas/mg m-3 | 860.2 | 902.5 |
| Clean flue gas sulfur dioxide concentration/mg m-3 | 17.6 | 18.4 |
| Desulfurization efficiency/%) | 98.0 | 98.0 |
| Height/m of slurry of desulfurizing tower | 12.7 | 12.8 |
| Oxidation blower Current/A | 57.4 | 53.6 |
| Flow/m of oxidation fan3·h-1 | 17343.6 | 16932.4 |
| Oxidation fan outlet pressure/kPa | 110.3 | 91.5 |
As can be seen from Table 1, after the oxidation air pipe anti-blocking device of the coal-fired flue gas wet desulphurization system is adopted, under the same operation working condition, the outlet pressure of the oxidation fan is obviously reduced, the reduction range is up to 17.0%, the current of the oxidation fan is reduced by 6.6%, and the energy-saving effect is obvious.
And in the shutdown maintenance process of the desulfurization system for a period of time, the oxidation air device of the desulfurization system is checked. Before the oxidation air pipe anti-blocking device of the coal-fired flue gas wet desulphurization system is adopted, the inner wall of the outlet of the oxidation air pipe is provided with annular hard scale with the width of about 5cm and the thickness of about 3cm, and the effective flow area of the oxidation air pipe is only 10cm of the residual central part2Left and right unplugged orifices. After the oxidation air pipe anti-clogging device of the coal-fired flue gas wet desulphurization system is adopted, a large amount of hard scale blocking objects do not exist at the inner wall of the outlet of the oxidation air pipe, the hard scale with the thickness of about 3mm is only remained on the inner wall, the influence on the flow area of the oxidation air pipe is extremely small, and the oxidation air device of the desulphurization system is ensured to always run in an economic and stable state.
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. An anti-clogging device for an oxidation air pipe of a coal-fired flue gas wet desulphurization system is characterized by comprising a gravity suspension descaling system; the gravity suspension descaling system comprises a suspension line (7), a suspension line (2) and a take-up device, wherein the suspension line (2) is connected with the suspension line (7) so that the suspension line (7) is suspended above the vertical section of the oxidation air pipe (9), the suspension line (2) is connected with the take-up device, the paying-off or taking-up action of the take-up device can control the lifting of the suspension line (7), the suspension line (7) is used for scraping off hard scale on the inner wall of the oxidation air pipe (9), and the width of the suspension line (7) is matched with the inner diameter of the inner wall of the oxidation air pipe (9).
2. The anti-clogging device for the oxidation air pipe of the coal-fired flue gas wet desulphurization system according to claim 1, further comprising a high-pressure water-spraying descaling system, wherein the high-pressure water-spraying descaling system is used for spraying water to descale the inner wall of the oxidation air pipe, the high-pressure water-spraying descaling system comprises a nozzle (8) and a spray pipe (3), and the spray pipe (3) is connected with the nozzle (8) and is used for supplying water to the nozzle (8).
3. The anti-blocking device for the oxidizing air pipe of the coal-fired flue gas wet desulphurization system according to claim 2, characterized in that an introducing sleeve (1) is further provided, the lower end of the introducing sleeve (1) is connected to the upper end of the vertical section of the oxidizing air pipe (9), and the suspension (7), the suspension wire (2), the spray pipe (3) and the nozzle (8) are arranged inside the introducing sleeve (1).
4. The anti-clogging device for the oxidizing air pipe of the coal-fired flue gas wet desulphurization system according to claim 3, wherein the introducing sleeve (1) is L-shaped; the corner of leading in sleeve pipe (1) is provided with pulley (6), hang line (2) lower extreme and connect hang (7), the upper end is walked around pulley (6) and to the horizontal direction extend again with take-up is connected.
5. The device for preventing the blockage of the oxidizing air pipe of the coal-fired flue gas wet desulphurization system according to claim 4, wherein the introducing sleeve (1) and the oxidizing air pipe (9) are integrally connected, and a T-shaped tee pipe structure is arranged at the joint of the introducing sleeve (1) and the oxidizing air pipe (9).
6. The anti-clogging device for the oxidation air pipe of the coal-fired flue gas wet desulphurization system according to any one of claims 1 to 5, characterized in that the suspension (7) is made of high chromium cast iron and is shaped into a multi-arm cross-legged structure.
7. The anti-clogging device for the oxidizing air pipe of the coal-fired flue gas wet desulphurization system according to claim 6, wherein the number of the support legs is 4.
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| CN202121437119.7U CN215656876U (en) | 2021-06-25 | 2021-06-25 | Oxidation tuber pipe anti-clogging device of coal-fired flue gas wet flue gas desulfurization system |
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| CN202121437119.7U CN215656876U (en) | 2021-06-25 | 2021-06-25 | Oxidation tuber pipe anti-clogging device of coal-fired flue gas wet flue gas desulfurization system |
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