CN212299011U - Wear-resistant and corrosion-resistant wall-attached airflow system for water cooled wall of garbage incinerator - Google Patents
Wear-resistant and corrosion-resistant wall-attached airflow system for water cooled wall of garbage incinerator Download PDFInfo
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- CN212299011U CN212299011U CN202020723698.0U CN202020723698U CN212299011U CN 212299011 U CN212299011 U CN 212299011U CN 202020723698 U CN202020723698 U CN 202020723698U CN 212299011 U CN212299011 U CN 212299011U
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Abstract
The utility model relates to an anti-abrasion and anti-corrosion adherence airflow system of a water-cooled wall of a garbage incinerator, which consists of a flue gas recirculation main pipe, an adherence airflow main pipe, a manual adjusting door, a temperature measuring device, an electric adjusting door, a flue gas measuring device, a check valve, adherence airflow branch pipes, a two-flue rear wall adherence airflow spout pipe, a two-flue rear wall adherence airflow spout, a two-flue ceiling adherence airflow spout and a two-flue ceiling adherence airflow spout pipe; the wall-adherent airflow is taken from a flue gas recirculation main pipe, two wall-adherent airflow branch pipes are respectively formed on a front wall of a flue and a ceiling of two flues, each wall-adherent airflow branch pipe extends to a furnace wall and is provided with three wall-adherent airflow nozzle pipes, each wall-adherent airflow nozzle pipe is connected with one wall-adherent airflow nozzle, the wall-adherent airflow generated by each nozzle is consistent with the flue gas flow direction generated by combustion, and the injection direction forms an included angle with the furnace wall; each wall-attached airflow branch pipe is provided with a check valve, an electric adjusting door, a manual adjusting door and a flow measuring device.
Description
Technical Field
The utility model belongs to the technical field of municipal solid waste incineration and specifically relates to regional deposition of water-cooling wall, wearing and tearing and corrode serious high parameter waste incineration exhaust-heat boiler.
Background
The high-temperature corrosion phenomenon is a common problem of a high-parameter waste incineration waste heat boiler, and the high-temperature corrosion trend of a water cooling wall becomes severe along with the development of main steam parameters from medium-temperature medium pressure to secondary high-temperature ultrahigh pressure (13.4MPa and 450 ℃). When the working medium in the water-cooled wall is in an ultrahigh pressure parameter, the steam-water density difference is reduced, so that the working medium circulation rate is slowed, the wall temperature at the tail end of water circulation is increased, and finally, the corrosion is aggravated. Meanwhile, the turning part of the flue gas has serious flue gas flow scouring, and under the combined action of scouring and corrosion, the ceilings of the first flue and the second flue and the rear wall of the second flue suffer from the problem of more serious wall thickness reduction than other areas, so that the safe and stable long-period operation of the boiler is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at relieving the problems of abrasion and corrosion of the tube bundles of the water-cooled wall in the first and second flue ceilings and the second flue rear wall areas.
The utility model provides a wear-resistant and corrosion-resistant adherence airflow system for water-cooled walls of garbage incinerators, which comprises a flue gas recirculation main pipe, an adherence airflow main pipe, a manual adjusting door, a temperature measuring device, an electric adjusting door, a flue gas measuring device, a check valve, adherence airflow branch pipes, a two-flue rear wall adherence airflow spout pipe, a two-flue rear wall adherence airflow spout, a two-flue ceiling adherence airflow spout and a two-flue ceiling adherence airflow spout pipe; the wall-adherent airflow is taken from a flue gas recirculation main pipe, two wall-adherent airflow branch pipes are respectively formed on a front wall of a flue and a ceiling of two flues, each wall-adherent airflow branch pipe extends to a furnace wall and is provided with three wall-adherent airflow nozzle pipes, each wall-adherent airflow nozzle pipe is connected with one wall-adherent airflow nozzle, the wall-adherent airflow generated by each nozzle is consistent with the flue gas flow direction generated by combustion, and the injection direction forms an included angle with the furnace wall; each wall-attached airflow branch pipe is provided with a check valve, an electric adjusting door, a manual adjusting door and a flow measuring device.
Further, the wall-attached airflow of the ceiling water wall comes from a flue gas recirculation main pipe and passes through a wall-attached airflow main pipe; a manual adjusting door and a temperature measuring device are arranged on the wall-attached air flow main pipe; the flue gas volume of the adherence air current accounts for 2% -10% of the total flue gas volume of the boiler operation, the adherence air current main pipe divides the flow into adherence air current branch pipes, the air current on the adherence air current branch pipes can be changed through the electric regulating valve, and the adherence air current branch pipes are provided with check valves, so that the enough high air current rigidity is ensured. The specific flue gas flow of the adherence airflow branch pipe can be monitored by a flue gas flow measuring device, the front wall of one flue is divided into three paths to enter a ceiling adherence airflow spout pipe of a second flue, and each ceiling adherence airflow spout pipe is connected with an adherence airflow spout.
Furthermore, the wall-attached airflow of the water-cooled wall of the rear wall of the two flues comes from the flue gas recirculation main pipe and passes through the wall-attached airflow main pipe; a manual adjusting door and a temperature measuring device are arranged on the wall-attached air flow main pipe; the flue gas volume of the adherence air current accounts for 2% -10% of the total flue gas volume of the boiler operation, the adherence air current main pipe divides the flow into adherence air current branch pipes, the air current on the adherence air current branch pipes can be changed through the electric regulating valve, and the adherence air current branch pipes are provided with check valves, so that the enough high air current rigidity is ensured. The specific flue gas flow of the wall-attached gas flow branch pipes can be monitored by a flue gas flow measuring device, the ceiling of the two flues is divided into three paths to enter the wall-attached gas flow nozzle pipes of the rear wall of the two flues, and each wall-attached gas flow nozzle pipe of the rear wall of the two flues is connected with one wall-attached gas flow nozzle.
Furthermore, the adherent gas flow is from a flue gas recirculation system, and the flue gas amount of the adherent gas flow accounts for 5% -20% of the total flue gas amount of the boiler in operation.
Furthermore, the distance between the wall-attached airflow nozzles arranged on the front wall of the first flue and the ceiling is 250-1500 mm, and the distance between the wall-attached airflow nozzles arranged on the ceiling of the second flue and the rear wall of the second flue is 250-1250 mm.
Furthermore, the number of the wall-attached airflow nozzles arranged on the front wall of the first flue ranges from 2 to 5, and the number of the wall-attached airflow nozzles arranged on the ceiling of the second flue ranges from 2 to 5.
Furthermore, the adherent airflow generated by each nozzle is consistent with the flue gas flow direction generated by combustion, and the included angle between the injection direction and the furnace wall is 2-22 degrees.
Furthermore, the adherent airflow nozzles are rectangular, and the adherent airflow speed from each nozzle is controlled to be 50-80 m/s.
Furthermore, the wall-attached airflow main pipe is provided with a temperature measuring device, so that the temperature of the flue gas recirculation incoming flow is effectively monitored, low-temperature corrosion is prevented, and the wall-attached airflow system pipeline is protected.
The utility model discloses rationally arrange the adherence air current between flue gas stream and the first and second flue ceiling and two flue back wall water-cooling wall tube panels that the burning produced respectively, can effectively alleviate waste incineration exhaust-heat boiler water-cooling wall wearing and tearing and corrosion problems. The utility model discloses an adopt the rectangle, take inclination's spout to arrange the form, can improve the rigidity of adherence air current and to the coverage area of ceiling, two flues back wall water-cooling wall tube panels, guarantee to utilize less flue gas flow of gas again can obstruct flying dust granule in the burning flue gas flow to contact the water-cooling wall to the degree of wear of tube bank has been reduced. Meanwhile, the wall temperature of the pipe bundle at the tail end of the water circulation of the ceiling and the rear wall of the two flues can be relieved by the lower wall-attached airflow temperature, so that the corrosion rate is reduced. The utility model relates to a rationally, through adherence airflow system, reduced the flue gas stream that the burning produced to the erodeing and corroding of two flue ceilings and two flue back walls, the long-time safe operation of msw incineration exhaust-heat boiler can be ensured to the deposition phenomenon of reducible this region simultaneously.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic view of the anti-abrasion and anti-corrosion wall-attached airflow system of the water-cooled wall of the garbage incinerator.
Fig. 2 is a schematic view of the arrangement of the adherent air flow of the water wall of the ceiling of the first and second flues for wear prevention and corrosion prevention.
Fig. 3 is a schematic view of the arrangement of adherent gas flow of the water wall of the back wall of the two flues for wear prevention and corrosion prevention.
FIG. 1 shows a flue gas recirculation main pipe; 2. an adherent gas flow main; 3. a manual adjustment gate; 4. a temperature measuring device; 5. an electrically operated adjustment gate; 6. a flue gas amount measuring device; 7. a check valve; 8. wall-attached airflow branch pipes; 9. the rear wall of the two flues is attached to the wall of the airflow nozzle pipe; 10. the rear wall of the two flues is attached to the wall airflow nozzle; 11. a second flue; 12. a first flue ceiling wall-attached airflow nozzle; 13. a first flue ceiling wall-attached airflow nozzle pipe; 14. a flue.
Detailed Description
The utility model provides a water-cooled wall abrasionproof anticorrosive adherence air current system of waste incinerator, the following combines the figure to do further detailed description to the utility model.
As shown in fig. 1 and 2, the utility model provides a pair of anticorrosive adherence airflow system of waste incinerator water-cooling wall abrasionproof, the structure that has in the anticorrosive aspect of a second flue ceiling water-cooling wall abrasionproof is as follows:
the adherent airflow of the ceiling water wall comes from the flue gas recirculation main pipe 1 and passes through the adherent airflow main pipe 2; a manual adjusting door 3 and a temperature measuring device 4 are arranged on the wall-attached air flow main pipe 2; the flue gas volume of here adherence air current accounts for 2% ~ 10% of boiler operation total flue gas volume, and the reposition of redundant personnel of adherence air current house steward 2 is adherence air current branch pipe 8, can change the air current on the adherence air current branch pipe 8 through electric control door 5, is equipped with check valve 7 on the adherence air current branch pipe 8, ensures the air current rigidity of high enough. The specific flue gas flow of the adherent gas flow branch pipe 8 can be monitored by the flue gas flow measuring device 6, the front wall of a flue 14 is divided into three paths to enter a ceiling adherent gas flow nozzle pipe 13 of a second flue, and each ceiling adherent gas flow nozzle pipe 13 is connected with an adherent gas flow nozzle 12.
The adherent airflow adopts rectangular adherent airflow nozzles which are arranged at the position 250-1500 mm away from the ceiling, and the speed of the adherent airflow from each nozzle is controlled at 50-80 m/s. And the adherent airflow generated by each nozzle is consistent with the flue gas flow direction generated by combustion, and the included angle A between the injection direction and the ceiling is 2-22 degrees. Aiming at the condition that the water cooling walls of the ceiling with the first flue and the second flue are positioned at the tail end of water circulation, the temperature of the tube walls is high and the water cooling walls are easily damaged by corrosive gas, and the temperature of the tube walls of the water cooling walls of the ceiling can be reduced by lower adherent airflow temperature. Aiming at the condition that the water-cooled walls of the ceilings of the first and second flues are in a flue gas turning area generated by combustion, hard particles in flue gas flow can scour the water-cooled wall tubes of the ceilings. High velocity of the adherent gas flow can alter the particle trajectory. The wall-attached airflow nozzle is integrally cast by adopting high-temperature-resistant alloy steel, so that the wear-resistant and corrosion-resistant service life performance of the wall-attached airflow nozzle is ensured.
As shown in FIG. 1 and FIG. 3, the utility model provides a pair of wear-proof anticorrosive adherence airflow system of waste incinerator water-cooling wall, the structure that has in the aspect of two flues back wall water-cooling wall wear-proof is as follows:
the wall-attached airflow of the water wall of the rear wall of the second flue comes from the flue gas recirculation main pipe 1 and passes through the wall-attached airflow main pipe 2; a manual adjusting door 3 and a temperature measuring device 4 are arranged on the wall-attached air flow main pipe 2; the flue gas volume of here adherence air current accounts for 2% ~ 10% of boiler operation total flue gas volume, and the reposition of redundant personnel of adherence air current house steward 2 is adherence air current branch pipe 8, can change the air current on the adherence air current branch pipe 8 through electric control door 5, is equipped with check valve 7 on the adherence air current branch pipe 8, ensures the air current rigidity of high enough. The specific flue gas flow of the wall-attached gas flow branch pipes 8 can be monitored by a flue gas flow measuring device 6, the flue gas flow is divided into three paths at the ceiling of the two flues 11 and enters the wall-attached gas flow nozzle pipes 9 of the rear wall of the two flues, and each wall-attached gas flow nozzle pipe 9 of the rear wall of the two flues is connected with one wall-attached gas flow nozzle 10.
The adherent airflow adopts rectangular adherent airflow nozzles which are arranged at the position 250-1500 mm away from the rear wall of the two flues, and the velocity of the adherent airflow from each nozzle is controlled at 50-80 m/s. And the adherent airflow generated by each nozzle is consistent with the flue gas flow generated by combustion, and the included angle A between the injection direction and the rear wall of the two flues is 2-22 degrees. Aiming at the condition that the water wall on the upper wall of the back wall of the two flues is at the tail end of water circulation, the temperature of the tube wall is high and the tube wall is easily damaged by corrosive gas, the lower temperature of the wall-attached airflow can reduce the temperature of the tube wall of the water wall on the upper wall of the back wall of the two flues. Aiming at the situation that the water-cooled wall pipes of the back walls of the two flues are scoured by hard particles in flue gas flow when the water-cooled walls of the back walls of the two flues are positioned in a flue gas turning area generated by combustion. High velocity of the adherent gas flow can alter the particle trajectory. The wall-attached airflow nozzle is integrally cast by adopting high-temperature-resistant alloy steel, so that the wear-resistant and corrosion-resistant service life performance of the wall-attached airflow nozzle is ensured.
To sum up, the utility model discloses the anticorrosive adherence airflow system characteristics of waste incinerator water-cooled wall abrasionproof include following several at least:
1. the adherence air current comes from flue gas recirculation main pipe, installs electric control door, flue gas flow measuring device, manual regulation door and check valve on every adherence air current branch pipe, ensures to realize accurate control and adjustment to adherence air current.
2. The problem of high-temperature corrosion at the tail end of the working medium circulation in the water-cooled wall pipe can be effectively solved.
3. The problem of erosion and abrasion of the water wall pipe in the flue gas flow turning area generated by combustion can be effectively solved.
4. The dust on the surface of the water-cooled wall tube panel in the adherence airflow coverage area can be effectively removed, and the contamination condition on the surface of the water-cooled wall tube panel is reduced.
The utility model discloses a city domestic waste incinerator water-cooling wall abrasionproof anticorrosive adherence air current system through the flue gas stream that produces burning and rational arrangement adherence air current respectively between a second flue ceiling and the two flue back wall water-cooling wall tube panels respectively, can effectively alleviate waste incineration exhaust-heat boiler water-cooling wall wearing and tearing and corrosion problems. Furthermore, the utility model relates to a rationally, arrange simply convenient operation. Can fundamentally prevent and control the high-temperature corrosion and abrasion of the water-cooled wall area of the garbage incinerator.
Claims (6)
1. An anti-abrasion and anti-corrosion wall-adhering airflow system for a water-cooled wall of a garbage incinerator is characterized by comprising a flue gas recirculation main pipe, a wall-adhering airflow main pipe, a manual adjusting door, a temperature measuring device, an electric adjusting door, a flue gas measuring device, a check valve, wall-adhering airflow branch pipes, a two-flue rear wall-adhering airflow nozzle pipe, a two-flue rear wall-adhering airflow nozzle, a two-flue ceiling wall-adhering airflow nozzle and a two-flue ceiling wall-adhering airflow nozzle pipe; the wall-adherent airflow is taken from a flue gas recirculation main pipe, two wall-adherent airflow branch pipes are respectively formed on a front wall of a flue and a ceiling of two flues, each wall-adherent airflow branch pipe extends to a furnace wall and is provided with three wall-adherent airflow nozzle pipes, each wall-adherent airflow nozzle pipe is connected with one wall-adherent airflow nozzle, the wall-adherent airflow generated by each nozzle is consistent with the flue gas flow direction generated by combustion, and the injection direction forms an included angle with the furnace wall; each wall-attached airflow branch pipe is provided with a check valve, an electric adjusting door, a manual adjusting door and a flow measuring device.
2. The wear and corrosion resistant adherent air flow system of a water cooled wall of a garbage incinerator of claim 1, wherein the adherent air flow of the water cooled wall of the ceiling comes from a flue gas recirculation main pipe and passes through an adherent air flow main pipe; a manual adjusting door and a temperature measuring device are arranged on the wall-attached air flow main pipe; the main adherent air flow branch pipe is divided into the adherent air flow branch pipes, the air flow on the adherent air flow branch pipe is changed through the electric regulating valve, the check valves are arranged on the adherent air flow branch pipes, the specific flue gas flow of the adherent air flow branch pipe is monitored through the flue gas volume measuring device, the front wall of a flue is divided into three paths to enter a first flue ceiling adherent air flow nozzle pipe and a second flue ceiling adherent air flow nozzle pipe, and each ceiling adherent air flow nozzle pipe is connected with one adherent air flow nozzle.
3. The adherent gas flow system of claim 1, wherein adherent gas flow from the rear wall of the two flues through the adherent gas flow header comes from the flue gas recirculation header; a manual adjusting door and a temperature measuring device are arranged on the wall-attached air flow main pipe; the main adherent air flow pipe is divided into adherent air flow branch pipes, air flow on the adherent air flow branch pipes is changed through the electric regulating door, check valves are arranged on the adherent air flow branch pipes, specific flue gas flow of the adherent air flow branch pipes is monitored through a flue gas volume measuring device, the ceiling of the two flues is divided into three paths to enter the two-flue rear wall adherent air flow nozzle pipe, and each two-flue rear wall adherent air flow nozzle pipe is connected with one adherent air flow nozzle.
4. The system of claim 1, wherein the distance between the adherent airflow nozzles arranged on the front wall of the first flue and the ceiling is 250-1500 mm, and the distance between the adherent airflow nozzles arranged on the ceiling of the second flue and the rear wall of the second flue is 250-1250 mm.
5. The anti-abrasion and anti-corrosion adherence airflow system of the water-cooled wall of the garbage incinerator according to claim 1, characterized in that the number of adherence airflow nozzles arranged on the front wall of one flue is 2-5, and the number of adherence airflow nozzles arranged on the ceiling of the two flues is 2-5.
6. The anti-abrasion and anti-corrosion adherence airflow system of the garbage incinerator water wall according to claim 1, characterized in that the included angle between the injection direction and the incinerator wall is 2-22 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020723698.0U CN212299011U (en) | 2020-05-06 | 2020-05-06 | Wear-resistant and corrosion-resistant wall-attached airflow system for water cooled wall of garbage incinerator |
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| CN202020723698.0U CN212299011U (en) | 2020-05-06 | 2020-05-06 | Wear-resistant and corrosion-resistant wall-attached airflow system for water cooled wall of garbage incinerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154402A (en) * | 2021-05-11 | 2021-07-23 | 广东烁鼎环境科技有限公司 | High-temperature corrosion resistant waste incineration waste heat boiler |
| CN115301676A (en) * | 2022-08-11 | 2022-11-08 | 同济大学 | Device and process for deeply removing organic matters by pyrolysis of waste salt |
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2020
- 2020-05-06 CN CN202020723698.0U patent/CN212299011U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154402A (en) * | 2021-05-11 | 2021-07-23 | 广东烁鼎环境科技有限公司 | High-temperature corrosion resistant waste incineration waste heat boiler |
| CN115301676A (en) * | 2022-08-11 | 2022-11-08 | 同济大学 | Device and process for deeply removing organic matters by pyrolysis of waste salt |
| CN115301676B (en) * | 2022-08-11 | 2024-07-12 | 同济大学 | Device and process for deeply removing organic matters through pyrolysis of waste salt |
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