CN111928283A - Online flushing method for air preheater - Google Patents
Online flushing method for air preheater Download PDFInfo
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- CN111928283A CN111928283A CN202010551042.XA CN202010551042A CN111928283A CN 111928283 A CN111928283 A CN 111928283A CN 202010551042 A CN202010551042 A CN 202010551042A CN 111928283 A CN111928283 A CN 111928283A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
Abstract
The invention relates to an online washing method of an air preheater, which comprises the following steps: s1, dredging an ash bucket of the air preheater to flush a sewage pipeline; s2, installing a high-pressure water spraying device to the position of a reserved track of the air preheater, and during installation, extending a high-pressure water pipe into the air preheater from a reserved pipeline, and sliding a spray gun into the air preheater from a through groove until the spray gun enters the air preheater; s3, starting the high-pressure water pump; s4, starting high-pressure water on-line purging, performing tentative flushing in a short time during purging, wherein the tentative flushing time is 8-12 min, gradually prolonging the testing time after checking the operation condition of the unit, and observing whether the current of a driving motor of the air preheater, the resistance of the air preheater, the smoke exhaust temperature, the pollution discharge condition of a flue and the operation of a dust remover are normal or not during and after flushing, wherein if the current is normal, the flushing time is respectively prolonged to 20min and 30min until the flushing is completed.
Description
Technical Field
The invention relates to the technical field of air preheaters, in particular to an online washing method of an air preheater.
Background
The air preheater is a heating surface which preheats air before entering the boiler to a certain temperature through internal radiating fins and is used for improving the heat exchange performance of the boiler and reducing energy consumption. Typically, the air preheater of the boiler used in power plant generation is located at the rear of the boiler (where flue gas and metal temperatures are lowest), and the heat transfer elements of the air preheater are often severely ash blocked. This may be due to fouling by acid or the cold end of the air preheater being too close to the water dew point, a condition caused by dew point condensation. Transformation to selective catalytic reduction conversion system, sulfur dioxide increases to sulfur trioxide conversion in the flue gas, simultaneously because SCR device ammonia escapes and generates ammonium bisulfate, because the below 147 ℃ of ammonium bisulfate is liquid after the smoke temperature drops, and the adhesion is extremely strong, and the regional smoke temperature in air heater lower part is less than 147 ℃, and liquid ammonium bisulfate further aggravates air heater's stifled ash. In addition, after stifled ash takes place, air heater's the flue gas side and the too big pressure differential of air side can make the air leak to the flue gas side from the seal gap, influence the heat transfer effect to, sulfur trioxide in the flue gas can combine with vapor to form the calculation, and then easily form acid dew under the lower circumstances of temperature in flue gas side bottom, forms the corruption to heat accumulation component.
The mode of solving this problem in the past is mostly blowing out, washing, blowing out the ash, waits to drop to the room temperature after air heater blowing out, adopts the high-pressure squirt again to wash air heater. And when washing, need artifical manual control barrel to remove, this kind of washing mode efficiency is lower, and is not enough to stifled grey clearance dynamics, and the pressure differential of air preheater access & exit can't reduce to the passing value.
Disclosure of Invention
The invention aims to provide an air preheater online washing method for improving washing efficiency and washing strength.
The technical purpose of the invention is realized by the following technical scheme:
a method for flushing an air preheater comprises the following steps:
s1, dredging an ash bucket of the air preheater to flush a sewage pipeline, wherein the dredging condition is qualified by negative pressure suction at a sewage outlet, and monitoring the dust accumulation and the sewage discharge condition in a flue in time in the flushing process; s2, installing a high-pressure water spraying device to the position of a reserved track of the air preheater, wherein a reserved pipeline communicated with the inside is arranged on one side of the air preheater, a through groove is formed in the inner wall of the reserved pipeline, the high-pressure water spraying device comprises a support positioned outside the air preheater, a guide rail is fixedly arranged on the support, a position adjusting part is arranged on the guide rail in a sliding mode, a high-pressure water pipe is fixedly arranged on the position adjusting part, the high-pressure water pipe is communicated with a water supply assembly, a spray gun is communicated and arranged on the circumferential surface of the high-pressure water pipe, the high-pressure water pipe extends into the air preheater from the reserved pipeline during installation, and the spray gun slides in from the through groove until the spray;
s3, starting the high-pressure water pump;
and S4, starting high-pressure water online purging, performing tentative flushing for a short time during purging, wherein the tentative flushing time is 8-12 min, gradually prolonging the test time after checking the operation condition of the unit, and observing whether the current of a driving motor of the air preheater, the resistance of the air preheater, the smoke exhaust temperature, the pollution discharge condition of a flue and the operation of a dust remover are normal or not during and after flushing, wherein if the current is normal, the flushing time is respectively prolonged to 20min and 30min until the flushing is completed.
According to the technical scheme, before the air preheater is flushed, the ash bucket is firstly dredged to ensure that mortar generated in the flushing process can be smoothly discharged, then the high-pressure water pipe extends into the air preheater from the reserved pipeline, the spray gun can smoothly enter the reserved pipeline due to the arrangement of the through groove, the high-pressure water pipe can be guided in the process of entering the air preheater through the sliding fit of the position adjusting piece and the guide rail, so that the convenience in the installation process is improved, then the high-pressure water pump is started to perform online blowing, the interior of the air preheater is flushed through the high-pressure water source sprayed out of the spray gun, during flushing, experimental flushing is firstly performed in a short time, the high-pressure water online flushing can be ensured not to generate harmful influence on a unit, and the unit can be ensured to normally operate; whether the unit operates normally or not is judged through various indexes such as air preheater resistance, exhaust gas temperature and the like, and the washing time is adaptively prolonged, so that the washing force can be ensured, and the damage to the unit can be reduced.
The present invention in a preferred example may be further configured to: in step S2, the position adjusting member includes a rack fixedly disposed on the lower surface of the guide rail, an adjusting block is slidably disposed on the guide rail, the adjusting block is fixed to the high-pressure water pipe, an adjusting motor is fixedly disposed on the adjusting block, an output shaft of the adjusting motor is fixedly disposed with a gear engaged with the rack to drive the adjusting block to slide along the guide rail, when the high-pressure water spraying device is installed, the high-pressure water pipe is aligned to the reserved pipe, the adjusting motor is started, and the high-pressure water pipe is electrically driven to extend into the air preheater.
Through above-mentioned technical scheme, when needs stretch into the air preheater with high pressure water pipe inside, at first start adjustment motor, adjustment motor drives the gear and rotates, and gear and rack meshing consequently can drive the adjusting block along the rack translation to inside driving and the fixed high pressure water pipe of adjusting block got into the air preheater, make high pressure water pipe get into the inside process of air preheater more reliable and more smooth.
The present invention in a preferred example may be further configured to: the adjusting block is fixedly provided with a placing table, the water supply assembly comprises a water pump and a water tank which are fixedly arranged on the upper surface of the placing table, the water tank, the water pump and the high-pressure water pipe are sequentially communicated, in the step S2, the high-pressure water pipe is stretched into the reserved pipeline, and the water pump and the water tank move together along with the adjusting block.
Through above-mentioned technical scheme, when washing the air preheater, the water pump with the moisture suction high pressure water pipe in the water tank, then spout into the air preheater inside from the spray gun to accomplish and wash, because water tank and water pump are fixed to be set up in placing the bench surface, therefore the pipeline between water pump and the high pressure water pipe needn't the overlength, at the in-process of installation high pressure water pipe, its smooth and easy nature further improves.
The present invention in a preferred example may be further configured to: in step S3, the water pump is started on the local control cabinet, and the pressure of the water pump is slowly increased to 30-50 MPa.
Through above-mentioned technical scheme, slowly step up the water pump, can reduce the high-pressure water spray to the damage of air preheater inner structure, maximum pressure control can ensure the normal work of air preheater inner structure under 30 MPa.
The present invention in a preferred example may be further configured to: before step S1, the unit load is continuously maintained at 300MW for 8 hours or more, and the tightness of the high-pressure water line and the water supply pressure of the water supply unit are checked before flushing.
Through the technical scheme, when the air preheater continuously works for more than 8 hours under the condition of 300MW, the air preheater can work in a better state, at the moment, the air preheater is damaged to the minimum extent during flushing, mortar falling during flushing can be discharged smoothly, the tightness of a high-pressure water pipeline and the water supply pressure of a water supply assembly are all factors which must be considered for ensuring normal flushing work, therefore, the preparation work before flushing is sufficient, and the flushing smoothness can be ensured.
The present invention in a preferred example may be further configured to: in the process of washing the air preheater in the steps S3 and S4, the bottom surface of the flue and the support hanger are monitored, the damage to the flue and the support hanger caused by the deposition of washed ash scale is prevented, and a maintainer can dredge the pipeline at the bottom of the air preheater at any time in the washing process to prevent blockage.
Through above-mentioned technical scheme, the in-process that washes the air preheater needs to pay attention to the operation condition of air preheater constantly and detects, ensures that the normal operating of air preheater is not influenced, and flue bottom surface, a gallows receive the structure of washing the damage in the structure of air preheater most easily, monitor at any time and can ensure the normal operating of air preheater.
The present invention in a preferred example may be further configured to: in the process of flushing the air preheater in the steps S3 and S4, observing whether the current of a driving motor of the air preheater, the resistance of the air preheater, the smoke exhaust temperature, the pollution discharge condition of a flue and the operation of a dust remover are normal or not, observing and recording parameters such as high-pressure water flushing time, pressure, unit load before and after flushing of the air preheater, pressure difference of smoke and air sides, currents of a blower and an induced draft fan, furnace pressure, hot air temperature and smoke exhaust temperature and the like, and reporting to operators when abnormity is found, wherein if the smoke exhaust temperature is too low, the flow of smoke on the flushing side can be timely adjusted, the smoke temperature is increased, and if the smoke exhaust temperature continuously drops to be lower than 85 ℃.
Through above-mentioned technical scheme, at the washing in-process, carry out multidimension degree observation and record to the air preheater, ensure that the air preheater is when obtaining washing, all aspects parameter can both remain stable unchangeable, appear changing the accident and in time adjust or stop washing work, ensure that the normal operating of air preheater is not influenced.
The present invention in a preferred example may be further configured to: in steps S3 and S4, the pressure difference at the inlet of the water pump is monitored, and when the pressure of the inlet water is less than 3bar, the pump is stopped to clean the filter screen.
Through above-mentioned technical scheme, when water pump import pressure differential was too little, then showed that the filter screen in the water pump blockked up, the water supply capacity can obviously be not enough this moment, need stop the pump and wash the filter screen, ensures that the washing dynamics is not influenced.
In conclusion, the beneficial technical effects of the invention are as follows:
1. by arranging the position adjusting block capable of sliding along the guide rail, when the air preheater is washed, the high-pressure water pipe can smoothly enter the air preheater, so that the washing convenience is improved;
2. during flushing, firstly, experimental flushing is carried out in a short time, then the flushing time is gradually prolonged, the flushing force can be improved, and the damage to the air preheater is reduced;
3. in the washing process, the normal operation of the air preheater can be grasped in real time by monitoring and recording parameters of all aspects of the air preheater, and meanwhile, the operation stability of the air preheater is ensured.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
FIG. 2 is a schematic structural view of a high pressure water spraying apparatus;
fig. 3 is a schematic structural diagram of a reserve pipe.
Reference numerals: 1. reserving a pipeline; 11. passing through the slot; 2. a high pressure water spray device; 21. a support; 211. a guide rail; 22. a high pressure water pipe; 221. a spray gun; 23. a water supply assembly; 231. a water pump; 232. a water tank; 3. a position adjustment member; 31. a rack; 32. a gear; 33. an adjusting block; 331. adjusting the motor; 332. and (6) placing the table.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
The utility model provides an air preheater anti-clogging device, as shown in figure 1, including fixed setting up in the reservation pipeline 1 of air preheater one side, reservation pipeline 1 and the inside cavity of air preheater, air preheater is provided with high-pressure water jet equipment 2 in the one side that is close to reservation pipeline 1, 2 high-pressure water pipe 22 of high-pressure water jet equipment, high-pressure water pipe 22 can let in inside the air preheater along reservation pipeline 1 to carry out the high pressure to the inside washing of carrying out of air preheater, improve inside washing dynamics and the washing efficiency of air preheater.
As shown in fig. 2, the high pressure water spraying device 2 further includes a bracket 21 and a water supply assembly 23, wherein the bracket 21 is disposed on one side of the air preheater near the reserved pipe 1, a guide rail 211 is fixedly disposed on the bracket 21, the guide rail 211 is parallel to an axis of the reserved pipe 1, a position adjusting member 3 is slidably disposed on the guide rail 211, the position adjusting member 3 includes a rack 31, a gear 32 and an adjusting block 33, wherein the adjusting block 33 is slidably fitted with the guide rail 211, the rack 31 is fixedly connected with a lower surface of the guide rail 211, an adjusting motor 331 is fixedly disposed on the adjusting block 33, an output shaft of the adjusting motor 331 is fixed with the gear 32, the gear 32 is engaged with the rack 31, one side of the adjusting block 33 facing the reserved pipe 1 is fixedly connected with the high pressure water pipe 22, when the high pressure water pipe 22 needs to be fed into the air preheater, the adjusting motor 331 drives the gear 32 to, and then drive adjusting block 33 and slide on guide rail 211, adjusting block 33 drives high pressure water pipe 22 and moves towards reservation pipeline 1 together, until inside high pressure water pipe 22 got into the air preheater through reservation pipeline 1, the sliding fit of track and adjusting block 33, make high pressure water pipe 22 get into the smoothness nature in the air preheater higher, and the setting of adjustment motor 331, make the process that high pressure water pipe 22 got into in the air preheater need not artifical manual the sending in, the installation effectiveness and the stability of high pressure water pipe 22 have indirectly been improved.
With reference to fig. 1 and 3, the high-pressure water pipe 22 is provided with a plurality of spray guns 221 along the length direction, each spray gun 221 is a nozzle with a small opening at the end, the arrangement of the spray guns 221 enables the pressure of water entering the air preheater to be large enough to meet the flushing requirement, and the plurality of spray guns 221 can improve the flushing force and the comprehensiveness and uniformity of the flushing force. The reserve pipe 1 is provided with a through groove 11 through which the spray gun 221 passes, so that the spray gun 221 can enter the air preheater without interference.
As shown in fig. 2, the water supply assembly 23 includes a water pump 231 and a water tank 232, the water pump 231 and the high-pressure water pipe 22 are communicated with each other through a hose, a horizontal placing table 332 is fixedly disposed on the adjusting block 33, and the water pump 231 and the water tank 232 are fixedly disposed on the upper surface of the placing table 332, so that when the adjusting block 33 moves along the guide rail 211, the water pump 231 and the water tank 232 move together, the hose distances between the water pump 231 and the water tank 232 and between the water pump 231 and the high-pressure water pipe 22 do not need to be changed, and an excessively long hose does not need to be disposed, thereby further improving the smoothness of the high-pressure water pipe 22 entering.
The implementation principle of the embodiment is as follows: when the air preheater needs to be washed, firstly, the high-pressure water spraying device 2 is moved to one side close to the reserved pipeline 1, the high-pressure water pipe 22 is aligned to the reserved pipeline 1, then the adjusting motor 331 is started, the adjusting motor 331 drives the gear 32 to rotate, the gear 32 is in meshing transmission with the rack 31, the adjusting block 33 is further driven to slide along the guide rail 211, then the horizontal pipeline is driven to enter the air preheater from the reserved pipeline 1, then the water pump 231 is started, the water pump 231 pumps water in the water tank 232 into the high-pressure water pipe 22, then a high-pressure water source is flushed into the air preheater through the spray gun 221, and the air preheater is cleaned. In conclusion, the installation of the high-pressure water pipe 22 and the washing process of the air preheater can be realized quickly, efficiently and accurately, and the washing efficiency is greatly improved.
Example 2
An on-line flushing method of an air preheater adopts the anti-blocking device of the air preheater described in the embodiment 1, and specifically comprises the following steps:
s1, preparing before flushing, including the following:
a. keeping the load of the unit continuously at 300MW for more than 8 hours;
b. the tightness of valves, flanges and joints on the high-pressure water pipe 22 and other pipelines is checked to ensure that the water pressure is not influenced during flushing;
c. the filter element of the water pump 231 inlet filter is detached for cleaning, and the inlet valve of the water pump 231 is opened to perform sewage disposal and flushing on the water inlet pipeline such as the high-pressure water pipe 22;
d. checking whether the motor of the water pump 231 and the local control cabinet are insulated and qualified and transmitting power;
e. ensuring that the water source pressure of the water pump 231 reaches 0.3-0.4 MPa;
s2, dredging a sewage discharge pipeline at the bottom of an ash hopper of the air preheater before flushing to ensure that mortar generated in the flushing process is smoothly discharged, wherein the dredging condition is qualified by suction of negative pressure at a sewage discharge outlet, and monitoring the dust accumulation and sewage discharge conditions in a flue in time in the flushing process;
s3, installing the high-pressure water pipe 22 into the air preheater, specifically, moving the high-pressure water spraying device 2 to one side of the reserved pipeline 1 to enable the high-pressure water pipe 22 to be aligned with the reserved pipeline 1, then starting the adjusting motor 331, enabling the adjusting motor 331 to feed the high-pressure water pipe 22 into the air preheater through the reserved pipeline 1 by means of meshing of the gear 32 and the rack 31 and sliding fit of the adjusting block 33 and the guide rail 211;
s4, starting the high-pressure water pump 231 on the local control cabinet, and slowly boosting the pressure of the water pump 231 to 30MPa, wherein the highest pressure is not more than 50MPa, so that the damage to the internal structure of the air preheater caused by instantaneous overhigh water pressure is prevented;
s5, starting high-pressure water online purging, wherein in order to ensure that high-pressure water online purging does not have harmful effects on the unit, experimental purging can be performed in a short time, after the unit operation condition is checked to be normal, the test time is gradually prolonged, specifically, purging is performed for 8-12 minutes first, then the water pump 231 is stopped, during and after purging, whether the air preheater driving motor current, the air preheater resistance, the smoke exhaust temperature, the flue pollution discharge condition and the dust remover are normal or not is observed, if the operation is normal, then the purging time is respectively prolonged to 20 minutes and 30 minutes, the purging time is adaptively prolonged, the purging force can be ensured, and the damage to the unit can be reduced;
in the process of flushing the air preheater, observing whether the current of a driving motor of the air preheater, the resistance of the air preheater, the smoke exhaust temperature, the pollution discharge condition of a flue and the operation of a dust remover (the inlet temperature is not lower than 95 ℃ and the differential pressure of a filter bag is not more than 1300 KPa) are normal, observing and recording parameters such as high-pressure water flushing time, pressure, unit load before and after flushing of the air preheater, differential pressure of smoke and air sides, current of a blower and an induced draft fan, furnace pressure, hot air and smoke exhaust temperature (the smoke exhaust temperature is not lower than 90 ℃) and the like, finding out abnormality and timely reporting to operators, if the smoke exhaust temperature is too low, timely adjusting the smoke flow at the flushing side, improving the smoke temperature, and if the smoke temperature is continuously.
During flushing, the pressure difference of the filter at the inlet of the water pump 231 (the pressure gauge at the inlet and the outlet) is monitored, and when the water inlet pressure is less than 3bar, the pump is stopped to clean the filter screen so as to avoid abnormal vibration of the pump caused by unsmooth water absorption.
The diameter of the nozzle for flushing is 1.5mm, the flushing pressure is not more than 50MPa, and the flow rate is controlled at 60L/min.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The method for flushing the air preheater is characterized by comprising the following steps of:
s1, dredging an ash bucket of the air preheater to flush a sewage pipeline, wherein the dredging condition is qualified by negative pressure suction at a sewage outlet, and monitoring the dust accumulation and the sewage discharge condition in a flue in time in the flushing process;
s2, installing a high-pressure water spraying device (2) to a reserved track position of an air preheater, wherein a reserved pipeline (1) communicated with the inside is arranged on one side of the air preheater, a through groove (11) is formed in the inner wall of the reserved pipeline (1), the high-pressure water spraying device (2) comprises a support (21) positioned outside the air preheater, a guide rail (211) is fixedly arranged on the support (21), a position adjusting piece (3) is arranged on the guide rail (211) in a sliding mode, a high-pressure water pipe (22) is fixedly arranged on the position adjusting piece (3), the high-pressure water pipe (22) is communicated with a water supply assembly (23), a spray gun (221) is communicated with the circumferential surface of the high-pressure water pipe (22), and during installation, the high-pressure water pipe (22) extends into the air preheater from the reserved pipeline (1), and the spray gun (221) slides in from the through groove (11) until the spray gun (221);
s3, starting the high-pressure water pump (231);
and S4, starting high-pressure water online purging, performing tentative flushing for a short time during purging, wherein the tentative flushing time is 8-12 min, gradually prolonging the test time after checking the operation condition of the unit, and observing whether the current of a driving motor of the air preheater, the resistance of the air preheater, the smoke exhaust temperature, the pollution discharge condition of a flue and the operation of a dust remover are normal or not during and after flushing, wherein if the current is normal, the flushing time is respectively prolonged to 20min and 30min until the flushing is completed.
2. The air preheater on-line flushing method according to claim 1, wherein: in step S2, the position adjusting member (3) includes a rack (31) fixedly disposed on the lower surface of the guide rail (211), an adjusting block (33) is slidably disposed on the guide rail (211), the adjusting block (33) is fixed to the high-pressure water pipe (22), an adjusting motor (331) is fixedly disposed on the adjusting block (33), an output shaft of the adjusting motor (331) is fixedly provided with a gear (32) engaged with the rack (31) to drive the adjusting block (33) to slide along the guide rail (211), when the high-pressure water spraying device (2) is installed, the high-pressure water pipe (22) is aligned to the reserved pipe (1), the adjusting motor (331) is started, and the high-pressure water pipe (22) is electrically driven to extend into the air preheater.
3. The air preheater on-line flushing method according to claim 2, wherein: the water supply device is characterized in that a placing table (332) is fixedly arranged on the adjusting block (33), the water supply assembly (23) comprises a water pump (231) and a water tank (232) which are fixedly arranged on the upper surface of the placing table (332), the water tank (232), the water pump (231) and the high-pressure water pipe (22) are sequentially communicated, and in the step S2, in the process that the high-pressure water pipe (22) extends into the reserved pipeline (1), the water pump (231) and the water tank (232) move together along with the adjusting block (33).
4. The air preheater on-line flushing method according to claim 3, wherein: in step S3, the water pump 231 is started on the local control cabinet, and the pressure of the water pump 231 is slowly increased to 30 to 50 MPa.
5. The air preheater on-line flushing method according to claim 1, wherein: before step S1, the load of the unit is continuously maintained at 300MW for more than 8 hours, and the tightness of the high-pressure water pipe (22) and the water supply pressure of the water supply assembly (23) are checked before flushing.
6. The air preheater on-line flushing method according to claim 1, wherein: in the process of washing the air preheater in the steps S3 and S4, the bottom surface of the flue and the support hanger are monitored, the damage to the flue and the support hanger caused by the deposition of washed ash scale is prevented, and a maintainer can dredge the pipeline at the bottom of the air preheater at any time in the washing process to prevent blockage.
7. The air preheater on-line flushing method according to claim 1, wherein: in the process of flushing the air preheater in the steps S3 and S4, observing whether the current of a driving motor of the air preheater, the resistance of the air preheater, the smoke exhaust temperature, the pollution discharge condition of a flue and the operation of a dust remover are normal or not, observing and recording parameters such as high-pressure water flushing time, pressure, unit load before and after flushing of the air preheater, pressure difference of smoke and air sides, currents of a blower and an induced draft fan, furnace pressure, hot air temperature and smoke exhaust temperature and the like, and reporting to operators when abnormity is found, wherein if the smoke exhaust temperature is too low, the flow of smoke on the flushing side can be timely adjusted, the smoke temperature is increased, and if the smoke exhaust temperature continuously drops to be lower than 85 ℃.
8. The air preheater on-line flushing method according to claim 1, wherein: in steps S3 and S4, the pressure difference at the inlet of the water pump (231) is monitored, and when the water inlet pressure is less than 3bar, the pump is stopped to clean the filter screen.
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| CN202010551042.XA CN111928283A (en) | 2020-06-17 | 2020-06-17 | Online flushing method for air preheater |
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|---|---|---|---|---|
| CN116428607A (en) * | 2023-06-14 | 2023-07-14 | 浙江程润云环境科技有限公司 | Denitration anti-blocking air preheater method and system |
| CN116428607B (en) * | 2023-06-14 | 2023-10-20 | 浙江程润云环境科技有限公司 | Denitration anti-blocking air preheater method and system |
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Address after: 300000 No. 398, west side of Tanghan Road, Beitang street, Binhai New Area, Tianjin Applicant after: Tianjin Guoneng Binhai Thermal Power Co.,Ltd. Address before: No.1-18, Taishan Road, Xinyu home community, Beitang, Tanggu, Binhai New Area, Tianjin, 300450 Applicant before: Tianjin Guodian Tianjin Binhai Thermal Power Co.,Ltd. |
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