JP4004476B2 - Incinerator and cleaning / repair method in incinerator - Google Patents

Description

  The present invention relates to a method for inspecting, cleaning and repairing an incinerator, for example, an incinerator having a plurality of waste incinerators, and an incinerator therefor.

  An incinerator, for example, a waste incinerator, is a so-called combustion chamber composed of a grate, a wall surface, and a ceiling for burning garbage. The combustion chamber is provided in a plurality of stages along the flow of the product gas generated by combustion. The lower part of the wall of the combustion chamber is in contact with the garbage and is built with refractory bricks. The upper part is covered with water pipes. Thus, the incinerator functions as a boiler for exchanging heat generated by the combustion of waste through a water pipe, and uses steam generated by heating water for power generation or the like. The surface of the water pipe where the combustion flame hits is covered with a castable refractory, and the water pipe placed on the rear stage from the part where the combustion flame converges is covered with an amorphous refractory. Not given.

  Thus, during the operation of the incinerator, fly ash generated when dust etc. burns adheres to the surface of the water tube and the furnace wall, and it hardens with the passage of the incinerator operation time and becomes a mass called clinker, It grows in the state of fly ash. This enlarged clinker has problems such as stopping the flow of garbage in the incinerator, peeling off by its own weight and damaging the hearth, and blocking the incineration ash outlet (lower part of the hearth). Cause an accident. Also, fly ash adhering to the incinerator wall and the water pipe inhibits the heat of the combustion gas from moving to the water through the water pipe wall, leading to an increase in the combustion waste temperature. Therefore, it is necessary to remove fly ash in the incinerator before the exhaust temperature from the final stage combustion chamber exceeds the reference temperature, for example, 300 ° C. On the other hand, refractory bricks at the bottom of the wall of the combustion chamber, and irregular refractories covering the water pipes, water pipes, etc., require periodic repair or replacement work. Thus, incinerators, such as waste incinerators, are periodically stopped, for example, after four months of operation, and the incinerator is inspected, cleaned and repaired, and if necessary, refractory bricks, irregular refractories, Water pipe repair or replacement work will be done.

  This furnace inspection, cleaning / repair work and refractory bricks, irregular refractories, water pipe repairs or replacement work are breathable covering the whole body in order to completely protect the worker's body from dioxins and fly ash. Not carried out with wearing protective clothing. Also, since dust protection is not perfect with a normal dust mask, a sealed air line mask is worn and fresh compressed air is supplied from the outside with an air hose, and an operator works while breathing this air. This work is a work to scrape clinker and fly ash adhering to the surface of the water pipe using a metal scraper and a hoe, or to clean by blowing compressed air, and refractory bricks, irregular refractories, Water pipe repair or replacement works include removal of damaged refractory bricks, new construction, removal of irregular-shaped refractories and new spraying, and repair of damaged parts by welding, cutting and removal of damaged parts, and replacement with new ones. With welding work. These operations are carried out based on the working scaffolds installed in each combustion chamber in the incinerator.

  By the way, a large amount of water, for example, 60 tons of water per incinerator is stored in the water pipe disposed in the incinerator, and the water temperature in the water pipe is 200 during operation of the incinerator (boiler). It has reached ℃. Thus, even if the operation of the incinerator is stopped, the water with high specific heat in the water pipe does not cool down rapidly, and inspection, cleaning / repair, refractory bricks, non-standard refractories, repair of water pipes, or replacement work It becomes a factor which makes the atmosphere in an incinerator high temperature. In this atmosphere, inspection, cleaning / repair and refractory bricks, non-standard refractories, water pipe repairs or replacement work, the amount of sweating is large, and there is a big thing that can not express physical load . Also, when removing or removing clinker or fly ash adhering to the water pipe or repairing or replacing refractory bricks or water pipes, fine fly ash that has peeled off drifts. Occasionally, fly ash flows out from the manhole of the incinerator and diffuses throughout the factory, causing secondary contamination.

In order to solve such problems, an apparatus has been proposed in which the ash in the incinerator is sucked and transported by a suction duct and stored in the ash sump so that the incinerator can be cleaned without human hands. (For example, refer to Patent Document 1).
JP 2001-090927 A

  However, an incinerator such as a waste incinerator is a boiler, and a large number of water pipes are arranged on the ceiling and side walls in multiple stages such as 6 to 7 stages, and the heat of the combustion gas is contained in the water pipe as much as possible. It is configured to be transferred to water. Thus, the means disclosed in the above-mentioned Patent Document 1 cannot perform inspection, cleaning / repair and refractory bricks, repairing or replacing pipes of irregular refractories, water pipes, and manual inspection. Cleaning, repairing and refractory bricks are indispensable for repairing or replacing irregular refractories and water pipes.

  The present invention makes the work harsh, inspection, cleaning / repair and refractory bricks are peeled off from the high temperature atmosphere in the incinerator subject to indefinite refractory, water pipe repair or replacement work, and from the furnace wall, water pipe surface, etc. In addition to improving the working environment where fine fly ash floats, inspection, cleaning / repair and refractory bricks will prevent the outflow of fly ash from incinerators that are subject to repairs or replacement of irregular refractories and water pipes. It is an object of the present invention to provide an in-furnace cleaning / repair method and an incinerator for performing this method.

The invention according to claim 1 for solving the above-mentioned problem is an incinerator in an incineration plant such as garbage having a plurality of incinerators, and the opening having an open / close lid of a combustion chamber at the rear stage of the incinerator Remove the open / close lid and connect the intake end of the ventilation duct for cleaning / repair that is in a vented state when the incinerator is at rest and cleaning / repair, close the open / close lid, and allow it to be separated, or provide ventilation open / close means The exhaust end is connected to one or both of the blower for the combustion primary air and the blower for the combustion secondary air of the other incinerator in operation through the blower intake side ventilation opening / closing means for the combustion air. It is configured so that the air in the incinerator subject to cleaning and repair is sucked and ventilated by one or both of the combustion primary air blower and the combustion secondary air blower of the operating incinerator. With features That is an incinerator.

  The invention according to claim 2 is the incinerator according to claim 1, wherein after the operation of the incinerator to be cleaned / repaired is stopped, the incinerator is cooled for a predetermined time. An opening having a means is opened to enable intake, and an intake end of a ventilation duct for cleaning / repair is attached and fixed to an opening having a closing means or a ventilation opening / closing means of a post combustion chamber, or a ventilation opening / closing means To open the ventilation state and close the intake side normal intake port of one or both of the blower for combustion primary air and the blower for combustion secondary air of the operating incinerator or reduce the intake amount. , Ventilation blocking means or ventilation opening / closing means at the connection between the exhaust end of the ventilation duct for cleaning / repair and the blower for the combustion primary air and / or the blower for the combustion secondary air of the incinerator in operation Open Clean and repair the incinerator to be cleaned and repaired by sucking the air in the incinerator to be cleaned or repaired by one or both of the primary air blower and secondary air blower in the incinerator in operation. The inside of the target incinerator is maintained at a negative pressure, and the incinerator is cleaned and repaired under the flow of fresh air sucked from the opening having the closing means or the vent opening / closing means of the pre-incinerator combustion chamber. This is an incinerator cleaning and repair method.

  According to the present invention, inspection, cleaning / repair and refractory bricks are opened from an opening having a closing means or a ventilation opening / closing means provided in the combustion chamber before the incinerator, while repairing or replacing an irregular refractory, water pipe, Fresh outside air is always sucked and circulated in the furnace, lowering the working environment temperature, and the generated dust is sucked and transported from the intake end of the cleaning / repair ventilation duct connected to the opening of the subsequent combustion chamber As a result, the work environment can be greatly improved. In addition, the air in the incinerator to be cleaned / repaired by the cleaning / repair ventilation duct is sucked into the intake side of either or both of the primary air blower and secondary air blower for the combustion incinerator in operation. During transport, inspection, cleaning / repair and refractory bricks, non-fixed refractories, water pipe repair or replacement work is always maintained at negative pressure, and fly ash flows out of the furnace. There is no.

  The present invention performs inspection, cleaning / repair, refractory bricks, repairing or replacing non-standard refractories and water pipes with a simple device configuration and without providing a new suction fan with initial cost and running cost. An incinerator can be provided.

  In the case of the invention according to claim 2, incineration is carried out in a construction period shortened by 30% to 40% without causing the dust to flow out of the furnace in an environment where the ventilation is sufficiently performed and the amount of dust floating is small. In-furnace inspection, cleaning / repair and refractory bricks can be used to repair or replace irregular refractories and water pipes.

  Hereinafter, the present invention will be described according to preferred embodiments thereof.

The outline | summary is demonstrated about the waste incineration factory of K city as an incinerator which concerns on one Embodiment of this invention. Fig. 1 shows an overview of a waste incineration plant in K City. This waste incineration plant has three incinerators. As shown in FIG. 1, the garbage collected from the city is thrown into the garbage pit 1, and is loaded into the loading hopper 2 from the garbage pit 1 by a crane (not shown). Garbage charged into the charging hopper 2 burns on the hearth (grate) 6. The temperature at this time is 800 ° C to 1000 ° C. Combustion primary air is blown from the lower part of the hearth (grate) 6 by a forced blower (combustion primary air blower) 3 in this embodiment at 36000 Nm ³ / hr. The intake end of the forced blower (combustion primary air blower) 3 faces the upper space in the waste pit 1 and functions to remove odors in the waste pit 1 together. Combustion secondary air is blown into the combustion flame in the upper part of the hearth (grate) 6 from the combustion secondary air blower 4 in this embodiment at 6000 Nm ³ / hr. From the bottom of the hearth (grate) 6 forming the inclined surface, the bottom ash is discharged from the ash removal device 17.

  In this embodiment, the combustion flame of the dust on the hearth (grate) 6 is the water in the boiler water pipe arranged in multiple stages on the wall surface and ceiling surface through the first combustion chamber to the fifth combustion chamber. And cool down while exchanging heat. In this embodiment, the average temperature in the first combustion chamber is about 900 ° C., and the average temperature in the fifth combustion chamber is about 300 ° C.

  The exhaust gas from the rear combustion chamber of the incinerator (boiler) 5, in this embodiment, the fifth combustion chamber, is further lowered in the temperature-reducing tower 7 to approximately 200 ° C. Water mist is injected into the temperature reducing tower 7, and the heat of the exhaust from the fifth combustion chamber is taken away by the latent heat of vaporization and heat exchange, and the temperature is lowered. This is done for the purpose of protecting the subsequent bag filter 8 from heat damage.

  The bag filter 8 is made of a heat-resistant chemical fiber, and traps floating fly ash in the exhaust gas (exhaust gas) according to the same principle as a household vacuum cleaner. Although the bag filter 8 is composed of a chemical fiber having heat resistance, it is damaged in a temperature range exceeding 250 ° C., so that the exhaust gas (exhaust gas) is lowered to 200 ° C. or less in the temperature reducing tower 7. The exhaust gas (exhaust gas) contains a large amount of hydrogen chloride (HCl), and in order to remove this, slaked lime is sprayed on the exhaust gas (exhaust gas) before the bag filter 8 to react with hydrogen chloride (HCl). The reaction product is also captured by the bag filter 8. At the rear stage of the bag filter 8, an attracting blower 9 is disposed.

  On the other hand, when the operation of the incinerator (boiler) 5 is stopped, the exhaust gas (exhaust) temperature falls, and the bag filter 8 becomes clogged when the temperature falls below 100 ° C. This is because slaked lime that reacts with hydrogen chloride (HCl) adhering to the bag filter becomes cocoon-like and closes the bag filter. Therefore, when the operation of the incinerator (boiler) 5 is stopped, the bag filter 8 is passed in the temperature range where the exhaust gas (exhaust) temperature is 100 ° C. or higher. Close it completely and turn on the electric heater so that the bag filter does not fall below 100 ° C. This makes it impossible to ventilate the incinerator 5 using the induction blower 9 at the rear stage of the bag filter 8 of the incinerator subject to inspection, cleaning / repair, refractory bricks, repair of water pipes, water pipe repair or replacement work. This is the reason.

The exhaust gas from which fly ash has been removed by the bag filter 8 is subjected to absorption removal of SO ₂ and HCl by a caustic soda solution (NaOH) injected in a smoke tower (wet exhaust gas cleaning device) 10. At this stage, the exhaust gas has a temperature of around 60 ° C. Thereafter, in order to prevent the gas discharged from the chimney 12 from touching the outside air and causing the water vapor in the exhaust gas to turn into white smoke, the exhaust gas is heated to about 140 ° C. again by the steam gas heater 11. .

  In the waste incineration plant described above, the inventors conducted in-furnace inspections, cleaning / repairs and refractory bricks in incinerators that are subject to repairs or replacement work of irregular refractories, water pipes, (1) in-furnace inspections, Cleaning / repairing and refractory bricks, removing irregularly generated refractories, dust generated in the furnace during water pipe repair or replacement work, (2) Keeping the furnace temperature as good as possible by providing good ventilation (3) In-furnace inspection, cleaning / repair and refractory bricks, dust, such as fly ash, flows out of incinerators that are subject to indefinite refractory, water pipe repair or replacement work. As a result of various examinations and ingenuity for the purpose of effectively suppressing the above, the present invention has been completed.

  FIG. 2 shows an embodiment of the present invention. In FIG. 2, 14 is a combustion secondary air intake port, and 15 is a duct blocking plate, which functions to block a flow path in a duct branched from a common duct 21 described later. Instead of the blocking plate 15, a blocking valve may be attached to open and close the flow path. Reference numeral 16 denotes a large front door (manhole) of the hearth, which is a detachable manhole made of an external iron skin lined with a refractory. Reference numeral 17 denotes an ash removal device, which is provided below the hearth (grate) 6. A combustion gas outlet 18 is the last stage of the incinerator (boiler) 5, and in this embodiment, combustion gas from the fifth combustion chamber passes through this and is sent toward the temperature-decreasing tower 7. Reference numeral 19 denotes a dumping hopper damper, which functions to open and close the garbage inlet in the charging hopper 2.

  Reference numeral 20 denotes a cleaning / repair ventilation duct. In this embodiment, a galvanized steel strip is spirally processed and welded into a pipe, and the intake end is the last of the incinerator (boiler) 5. In this embodiment, it is detachably provided in the manhole at the bottom of the fifth combustion chamber. When cleaning or repairing inside the furnace or repairing refractory bricks, non-standard refractories, water pipes, or replacing work, remove the steel manhole cover lined with refractories and inhale the ventilation duct 20 for cleaning and repair into the manhole. Attach the edges airtight.

  Reference numeral 21 denotes a common duct, to which an exhaust end of a cleaning / repair ventilation duct 20 of each incinerator (boiler) 5 is connected. In FIG. 2, for the sake of simplicity, only the ventilation duct 20 for cleaning / repair of the incinerator 5 subject to the above inspection, cleaning repair, and refractory bricks, repairing an irregular shaped refractory, water pipe, or replacement work is shown. ing. In this embodiment, the common duct 21 is branched into a duct whose exhaust end is connected to the intake pipe of the blower 4 for the combustion secondary air of each incinerator (boiler) 5 via a blocking plate 15. .

  22 is an operator who checks, cleans and cleans bricks, inspects and cleans the inside of the incinerator 5 subject to repair or replacement work for indeterminate refractories, water pipes, and work. Repairs and refractory bricks, repairs or replaces irregular refractories and water pipes. Inspection, cleaning / repair, and refractory bricks in the furnace, repairing or replacing the non-standard refractory and water pipe are performed after the worker 22 is fully equipped as shown in FIG. In FIG. 4, 31 is a helmet, 32 is protective glasses, 33 is an airline mask, 34 is protective clothing, 35 is a flashlight, 36 is a safety belt, 37 is a hand tool, 38 is an air hose, and 39 is safety shoes. Since the worker 22 performs the work with such heavy equipment, it is very important to remove the suspended dust as well as to provide sufficient ventilation in the furnace.

  In FIG. 2, reference numeral 24 denotes a combustion secondary air blower inlet damper, which functions to open and close the intake side flow path of the combustion secondary air blower 4. A combustion gas outlet damper 28 opens and closes the gas flow path at the combustion gas outlet 18.

  In this embodiment, as described above, the exhaust end of the cleaning / repair ventilation duct 20 is connected to the intake side of the combustion secondary air blower 4 via the common duct 21. Of course, it is possible to connect to the intake side of the forced blower (combustion primary air blower) 3 shown in FIG. As described above, in the present invention, the exhaust end of the ventilation duct 20 for cleaning / repair is connected to one or both of the forced blower (combustion primary air blower) 3 and the combustion secondary air blower 4. be able to.

Next, the in-furnace cleaning / repair method of the present invention will be described.
First, a state when all three incinerators (boilers) 5 are in steady operation will be described. FIG. 3 shows a state where three incinerators (boilers) 5 are operating. In FIG. 3, for the sake of simplicity, the cleaning / repair ventilation duct 20 provided in all three incinerators (boilers) 5 is omitted. As shown in FIG. 3, when all three incinerators (boilers) 5 are operating, a duct branched from a common duct 21 connected to the intake side of the blower 4 for combustion secondary air. The common duct 21 and the intake side of the combustion secondary air blower 4 are completely blocked by the duct blocking plate 15. Thus, the combustion secondary air is supplied only from the combustion secondary air inlet 14. At that time, the combustion secondary air blower inlet damper 24 is in an “open” state, and a flow path is formed through which intake air from the combustion secondary air intake opening 14 is taken into the combustion secondary air blower 4. .

  On the other hand, the manhole to be connected to the intake end of the cleaning / repair ventilation duct 20 in the rear stage of the incinerator (boiler) 5 in this embodiment, the title combustion chamber, is completely closed with a manhole cover. Further, the charging hopper damper 19 in the charging hopper 2 is in an “open” state, and is capable of charging garbage into the charging hopper 2. In this state, as shown in FIG. 3, all three waste incinerators (boilers) 5 are operating in a steady operation state.

  Next, the state of any incinerator (boiler) 5 when in-furnace inspection, cleaning repair or refractory brick repairs or replaces an irregular refractory or water pipe will be described. FIG. 2 shows a state in which any one incinerator (boiler) 5 is subjected to in-furnace inspection, cleaning repair or refractory brick repairing an irregular refractory, water pipe or replacement work. After the operation is stopped, the incinerator (boiler) 5 is cooled for about 48 hours. In this embodiment, after cooling in the furnace, the manhole cover at the bottom of the fifth combustion chamber is removed, and then the intake end of the cleaning / repair ventilation duct 20 is connected to the manhole in an airtight manner. On the other hand, as shown in FIG. 2, in-furnace inspection, cleaning repair and refractory bricks, irregular refractories, water pipe repair or replacement incinerators for combustion secondary air inlet damper 24, input hopper damper 19, In addition, the combustion exhaust gas outlet damper 28 is closed, and the duct flow path branched from the common duct 21 is blocked by the duct blocking plate 15. Further, a large front door (manhole) under the hearth (grate) 6 is opened so that outside air can be sucked.

Subsequently, the duct blocking plate 15 branched off from the common duct 21 on the intake side of the combustion secondary air blower 4 in the other two incinerators (boilers) 5 in operation is removed, and the flow path is changed to “ At the same time, the combustion secondary air suction port 14 is closed and all the intake air from the combustion secondary air blower 4 is switched via the branch duct from the common duct 21. Thus, in this embodiment, the intake air of the blower 4 for the combustion secondary air in the two incinerators (boilers) 5 in operation causes the air volume of 12000 Nm ³ / hr to be in-furnace inspection, cleaning repair and fire resistance. Brick is sucked from the furnace for repairing or replacing the irregular refractories and water pipes. As a result, in-furnace inspection, cleaning repairs and refractory bricks, irregular-shaped refractories, water pipe repairs or replacement work are ventilated in the furnace, and the inside of the furnace is in a negative pressure state of minus several millimeters to several tens of millimeters It is maintained and the outflow of dust such as fly ash from the furnace is completely suppressed.

  Next, in each combustion chamber in the incinerator (boiler) 5, in this embodiment, in the first combustion chamber to the fifth combustion chamber, in-furnace inspection, cleaning repair and refractory bricks, irregular refractories, water pipes A scaffold for repair or replacement work will be installed.

  The worker 22 wears the equipment shown in FIG. 4, scrapes off fly ash adhering to the surface of the water pipe in the incinerator (boiler) 5 using a metal scraper and firewood, and sprays compressed air. Clean. In addition, repair or replace the refractory bricks and water pipes covering the refractory bricks and water pipes at the bottom of the combustion chamber wall. In this case, although a large amount of dust is generated, a large amount of air is sucked from the intake end of the ventilation duct 20 for cleaning and repair. It is sucked and transported by the blower 4 and is quickly removed from the furnace to be cleaned and repaired.

  In the furnace inspection, cleaning repair and refractory bricks by the cleaning / repair ventilation duct 20 described above, ventilation, dust removal, and negative pressure state in the furnace subject to repair or replacement work of irregular refractories and water pipes. The maintenance is achieved without providing a new suction fan. As a result, in-furnace inspection, cleaning repairs and refractory bricks, non-standard refractories, water pipe repairs or replacement work, a sufficient flow of fresh air from the outside is generated in the furnace, and the generated dust is also cleaned and cleaned. The suction ventilation duct 20 for repair was quickly sucked and removed from the intake end, and the field of view was sufficiently improved. Also, due to wearing air respirators and highly airtight dust proof clothing, the temperature felt by the workers was extremely high and forced to perform replacement work at intervals of about 30 minutes. Was greatly eased by the occurrence of the problem, and the load on the workers was reduced.

  FIG. 5 shows changes in the temperature at the outlet of the furnace subject to inspection, cleaning / repair and refractory bricks, repair of an irregular shaped refractory, water pipe, or replacement work in this embodiment (indicated by a dotted line). ) And when the present invention is not applied (indicated by a dotted line). As is apparent from FIG. 5, according to the present invention, the time to reach the temperature level of 36 ° C. at which the in-furnace operation can be started is shortened by about 20 hours compared with the case of not implementing the present invention.

According to the present invention, inspecting, cleaning and repairing the inside of the furnace, and repairing or replacing the refractory and water pipes for irregular shaped refractories and water pipes can be shortened by about 20 hours. In the example, the effect of lowering the sensible temperature due to a large amount of ventilation of 12000 Nm ³ / hr is extremely large.

  Dust from the furnace subject to inspection, cleaning / repair, refractory brick, irregular refractory, water pipe repair or replacement work is sucked into the operating incinerator, but the amount of dust scattered in the furnace Therefore, there is no influence on the blower 4 for combustion secondary air and the incinerator in operation.

  On the other hand, dust generated in furnaces subject to inspection, cleaning / repair, refractory bricks, irregular refractories, water pipe repairs, or replacement works has been inconvenient so far, and some of them have been incinerator manholes. Erupted from and contaminated the incineration plant. The dust that flowed to the outside accumulated in the upper part of each facility in the factory, and it flew up by workers' walking and winds, deteriorating the environment. By the present invention, inspection, cleaning / repair and refractory bricks can be maintained at a negative pressure in the furnace subject to indefinite refractories, water pipe repair or replacement work, inspection, cleaning / repair and refractory bricks, indeterminate refractories, water pipes As a result, it was possible to completely prevent the outflow of dust to the outside of the furnace subject to repair or replacement work, and the visibility inside the furnace was improved, and the above problems were solved.

  In addition, inspection, cleaning / repair and refractory bricks, irregular refractories, water pipe repair or replacement, and the ventilation in the furnace subject to replacement work have been greatly improved. The water pipe repair or replacement work was shortened from 15 days to 11 days by 4 days. The incinerator is inspected, cleaned and repaired three times a year, and refractory bricks are repaired or repaired or replaced with irregular refractories and water pipes. The three incinerators shortened the process by 36 days per year.

  In this embodiment, any one incinerator is inspected, cleaned / repaired or refractory, but when repairing or replacing an irregular refractory or water pipe, the combustion of two incinerators in operation Although the normal air inlet 14 of the secondary air blower 4 is completely closed to exhaust the exhaust from the ventilation duct 20 for cleaning / repair, inspection, cleaning / repair and refractory bricks are irregular refractories. Air intake from the normal inlet 14 and the ventilation duct for cleaning / repair under the condition that the inside of the furnace subject to water pipe repair or replacement work is maintained at a negative pressure and sufficient ventilation can be obtained for the work. Of course, the ratio may be controlled. Of course, this can be carried out for either one or both of the forced air blower (combustion primary air blower) 3 and the combustion secondary air blower 4.

Block diagram showing the processing flow in a waste incinerator Schematic diagram showing patterns of ventilation airflow in an incinerator subject to inspection, cleaning / repair and refractory bricks, irregular refractories, water pipe repair or replacement work, and an incinerator in operation according to an embodiment of the present invention Schematic diagram showing the flow of secondary combustion air when all incinerators are operating and the state of operation of the incinerator Front view showing the equipment of the operator when carrying out inspection, cleaning / repair and fireproof bricks, repairing or replacing irregular refractories and water pipes The graph which shows the temperature transition in the incinerator for inspection, cleaning / repair and refractory brick, irregular refractory, water pipe repair or replacement work according to one embodiment of the present invention

Explanation of symbols

1 Garbage pit 2 Input hopper 3 Pushing blower (Blower for primary combustion air)
4 Blower for combustion secondary air 5 Waste incinerator (boiler)
6 hearth (grate)
7 Cooling Tower 8 Bag Filter 9 Induction Fan 10 Smoke Washing Tower 11 Steam Gas Heater 12 Chimney 14 Combustion Secondary Air Suction Port 15 Duct Shield Plate 16 Large Door Front Door 17 Ashing Device 18 Combustion Gas Outlet 19 Input Damper for hopper 20 Duct for cleaning and repair 21 Common duct 22 Worker 24 Blower inlet damper for combustion secondary air 28 Combustion gas outlet damper 31 Helmet 32 Protective glasses 33 Airline mask 34 Protective clothing 35 Flashlight 36 Safety belt 37 Hand Tool, nozzle for air blow 38 Air hose 39 Safety shoes

Claims (2)

An incinerator in an incineration plant such as garbage having a plurality of incinerators , wherein the opening having an open / close lid of the combustion chamber at the rear stage of the incinerator is in a state of ventilation while the incinerator is suspended and during cleaning / repair・ The intake end of the ventilation duct for repairing is connected with the opening / closing lid removed, the opening / closing lid is closed and separated, or connected via a ventilation opening / closing means, and the exhaust end is connected to the intake side ventilation opening / closing of the blower for the combustion air The air in the incinerator that is idle and subject to cleaning / repair is configured to be connected to one or both of the blower for the combustion primary air and the blower for the combustion secondary air of another incinerator in operation Is inhaled and ventilated by either or both of a primary air blower and a secondary air blower for the incinerator in operation . 2. The incinerator according to claim 1, wherein the incinerator to be cleaned and repaired is cooled for a predetermined time after being stopped, and then an opening having a closing means or a ventilation opening / closing means of the pre-combustion combustion chamber is opened to allow intake In addition, the intake end of the ventilation duct for cleaning / repair is attached and fixed to the opening having the closing means or the ventilation opening / closing means of the combustion chamber at the rear stage of the incinerator, or the ventilation opening / closing means is opened to allow ventilation, and the operation is performed. Close the intake side normal intake port or reduce the intake amount of either or both of the primary air blower and secondary air blower of the incinerator, while the exhaust end of the ventilation duct for cleaning and repair Open the ventilation blocking means or ventilation opening / closing means at the connection with either or both of the combustion primary air blower and combustion secondary air blower of the incinerator in operation to make it in a state where ventilation is possible. repair The air in the elephant incinerator is sucked by one or both of the primary air blower and / or secondary air blower in the incinerator in operation, and the incinerator to be cleaned and repaired has a negative pressure. An incinerator characterized in that the incinerator is cleaned and repaired under a flow of fresh air sucked from an opening having a closing means or a ventilation opening / closing means of the pre-combustion chamber of the incinerator. In-furnace cleaning and repair methods.

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