JP2015068517A - Combustion operation method in combustion furnace and combustion furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion furnace operation method and a combustion furnace capable of controlling the behavior of a pyrolysis gas from fire gates with a simple operation and stably reducing NOx emission without changing a recirculated-exhaust-gas flow distribution.SOLUTION: A combustion operation method in a combustion furnace (1) for supplying an exhaust gas (recirculated exhaust gas) discharged from a secondary combustion chamber (3) of a combustion furnace (1) from a ceiling wall (drying-stage-upper-portion ceiling wall) (7) located above fire gates (4) used for drying and from a rear wall (8) so that the exhaust gas does not directly abut on fire gates (4) on a furnace bottom and a gas generated by combustion is attracted, includes controlling a behavior of a pyrolysis gas in a primary combustion chamber (2) by changing a supply angle (12) of the recirculated exhaust gas supplied from the drying-stage-upper-portion ceiling wall (7) depending on a combustion status of refuse in the primary combustion chamber (2).

Description

  The present invention relates to a combustion operation method and an incinerator in an incinerator used for incinerating waste.

  A plurality of inclined or horizontal grate is installed at the bottom of the primary combustion chamber, the primary air for combustion is fed from the lower side of the grate to burn the waste in the primary combustion chamber, and the combustion of the waste Conventionally, incinerators are known in which the generated gas is further sent to a secondary combustion chamber provided in the upper part of the primary combustion chamber, and secondary air is fed into the secondary combustion chamber where secondary combustion is performed.

  Patent Document 1 discloses that in such an incinerator, the exhaust gas temperature at the furnace outlet can be adjusted within a predetermined temperature range, and has a high nitrogen oxide suppressing effect. It describes how to operate an incinerator that does not corrode.

  In this operation method, the exhaust gas discharged and cooled from the incinerator is circulated and sent above the grate in the primary combustion chamber, and the combustion flame is directly transferred by the exhaust gas sent to the primary combustion chamber. It was something to cool. That is, the exhaust gas is sent in a direction that directly hits the combustion flame. This operation method was intended to directly cool the incineration flame with the exhaust gas fed into the primary combustion chamber, and to gently burn the combustion gas completely, including the mixing and stirring effect of the combustion gas. This operation method was also intended to adjust the exhaust gas temperature at the furnace outlet within a predetermined range and to satisfactorily control the generation of nitrogen oxides.

  Further, Patent Document 2 is provided with an exhaust gas nozzle that is disposed on the front furnace wall of the combustion furnace and sends combustion exhaust gas from the drying zone side to the flame combustion zone side, and is disposed on the rear furnace wall of the combustion furnace. A method is described in which an exhaust gas nozzle for sending combustion exhaust gas from the vertical combustion zone side to the flame combustion zone side is provided, and the combustion exhaust gas is sent from each nozzle toward the center of the flame combustion zone flame.

  According to this method, since the hot gas temperature and oxygen concentration in the flame are lowered, the flame temperature is lowered and the flame space is expanded. As a result, damage to the hearth and clinker attached to the hearth and the furnace wall and the hearth furnace wall at the time of incineration of the high calorific fuel can be prevented, and generation of NOx can be suppressed as the flame temperature decreases.

JP 59-441513 Japanese Patent Publication No. 5-31045

  If the applicant has already supplied the recirculated exhaust gas from a specific position in the furnace, the pressure in the vicinity of the recirculated exhaust gas outlet will be lower than the surrounding pressure, so the combustion exhaust gas from the dust layer will be attracted. As a result, it was found that the entire primary combustion chamber can be effectively used as a combustion space, and various investigations were made on the supply position and supply direction of the recirculated exhaust gas. An application has been filed (PCT / JP2013 / 059277).

  According to the above-mentioned patent application, the temperature distribution of the entire incinerator is made uniform, and the local high-temperature field is eliminated, thereby reducing the NOx emission amount.

However, the combustion position of the waste in the primary combustion chamber can vary depending on the composition of the carried-in garbage, and when the waste combustion position moves to the drying stage side, it is attracted to the ceiling of the drying stage. The amount of pyrolysis gas increases, and the concentration of CO and NH _{3 at} the outlet of the secondary combustion chamber increases. Conversely, when the garbage combustion position moves to the rear combustion stage side, most of the pyrolysis gas is drawn to the rear wall side, so that the NO concentration increases.

  In order to improve such a situation, the present applicant has proposed that the flow rate ratio of the recirculated exhaust gas blown from the ceiling and rear wall of the drying stage is changed according to the change of the combustion position of the garbage (Japanese Patent Application 2013- 38510).

  However, in the method according to the above patent application, the control is severe, and there is a possibility that the ideal distribution cannot be made depending on the fan capacity.

  The present invention has been made in view of the above circumstances, and controls the behavior of pyrolysis gas from the grate with a simple operation without changing the flow distribution of the recirculated exhaust gas, and stably discharges NOx. It aims at providing the operating method and incinerator of an incinerator which can reduce quantity.

  The present inventors have found that the amount of pyrolysis gas attracted to the drying stage can be controlled by changing the blowing angle of the recirculated exhaust gas blown from the upper ceiling wall of the drying stage, and to complete the present invention. It came.

  That is, the present invention is provided with a plurality of grate at the bottom of a primary combustion chamber of an incinerator for incineration of waste, and primary air for combustion is fed from the lower side of the grate to burn waste. In the incinerator where the gas generated by the above is sent to a secondary combustion chamber provided in the upper part of the primary combustion chamber, and secondary air is sent to the secondary combustion chamber where secondary combustion takes place The exhaust gas discharged from the secondary combustion chamber of the furnace (hereinafter also referred to as recirculated exhaust gas) is located above the grate used for drying among the grate provided at the bottom of the primary combustion chamber. Caused by combustion from the ceiling wall (hereinafter also referred to as the upper ceiling wall of the drying stage) and from the rear wall on the downstream side with respect to the dust supply direction in the primary combustion chamber, so as not to hit the furnace floor grate directly An incinerator that supplies gas to attract In this combustion operation method, the behavior of the pyrolysis gas in the primary combustion chamber is changed by changing the supply angle of the recirculated exhaust gas supplied from the upper ceiling wall of the drying stage according to the combustion state of the dust in the primary combustion chamber. The present invention relates to a combustion operation method in an incinerator.

  In the above-described combustion operation method in the incinerator of the present invention, preferably, when the combustion position of the waste in the primary combustion chamber moves to the drying stage side, that is, the front side, recirculation supplied from the upper ceiling wall of the drying stage. The exhaust gas supply angle is adjusted to be more upward, and conversely, when the combustion position of the waste in the primary combustion chamber moves to the rear combustion stage side, that is, rearward, it is supplied from the upper ceiling wall of the drying stage. Adjust the supply angle of the recirculated exhaust gas to be more downward.

In the combustion operation method in the incinerator of the present invention, preferably, the CO concentration at the outlet of the secondary combustion chamber and / or the NH ₃ concentration near the upper ceiling wall of the drying stage of the primary combustion chamber is an average of 1 minute to 4 hours. The value tends to increase when the combustion position of the waste in the primary combustion chamber moves forward, and the CO concentration at the outlet of the secondary combustion chamber and / or near the upper ceiling wall of the drying stage of the primary combustion chamber. The case where the NH ₃ concentration tends to decrease with an average value of 1 minute to 4 hours is a case where the combustion position of the dust in the primary combustion chamber moves backward. In the present specification, “near the wall” means a space in a range of about 0 to 100 cm away from the wall.

In the combustion operation method in the incinerator of the present invention, preferably, when the NO concentration at the outlet of the secondary combustion chamber tends to increase with an average value of 1 minute to 4 hours, the combustion position of the waste in the primary combustion chamber is This is the case where the NO concentration at the outlet of the secondary combustion chamber tends to decrease with an average value of 1 minute to 4 hours, and the combustion position of the dust in the primary combustion chamber has moved forward. . The reason why the concentration of NH ₃ or NO is evaluated by the average value of 1 minute to 4 hours as described above is that, if the concentration is less than 1 minute, the concentration varies so much that the control of the supply angle of the recirculated exhaust gas cannot follow. This is because if the time is exceeded, the change in concentration based on the change in the combustion position cannot be correctly captured.

  In the combustion operation method in the incinerator of the present invention, preferably, the temperature near the upper ceiling wall of the drying stage tends to decrease, and the temperature near the ceiling wall of the rear combustion stage tends to increase, This is a case where the combustion position of the waste has moved rearward.

  In the combustion operation method in the incinerator of the present invention, preferably, the supply angle of the recirculated exhaust gas supplied from the upper ceiling wall of the drying stage is in a range of −30 ° to 0 ° with respect to the horizontal direction (in the horizontal direction). The upward direction is a positive (plus) angle). If it is set below -30 °, it is not recommended because the recirculated exhaust gas supplied from the top ceiling of the drying stage flows into the ignition zone and may cause misfire.

  Further, the present invention is provided in a primary combustion chamber in which primary combustion of waste is performed, and an upper portion of the primary combustion chamber in which secondary combustion is performed on a gas generated by combustion of waste in the primary combustion chamber. A secondary combustion chamber, a plurality of grate is provided at the bottom of the primary combustion chamber, and primary air used for combustion of garbage is sent from the lower side of the grate, The secondary combustion chamber is an incinerator configured to receive secondary air sent to the secondary combustion chamber for secondary combustion of gas generated by combustion of waste, The primary combustion chamber has recirculation exhaust gas supply means for supplying recirculation exhaust gas to the upper ceiling wall and the rear wall of the drying stage so as not to directly hit the grate at the bottom of the furnace and to attract the gas generated by the combustion. Recycled exhaust gas is provided on the upper ceiling wall of the drying stage. The means has gas supply angle adjusting means for changing the supply angle of the recirculated exhaust gas supplied from the upper ceiling wall of the drying stage according to the combustion state of the dust in the primary combustion chamber. .

  In the incinerator of the present invention, preferably, the incinerator has detection means for judging the state of combustion of the dust in the primary combustion chamber.

  In the incinerator of the present invention, preferably, the detection means is a CO concentration detection means provided in the secondary combustion chamber.

In the incinerator of the present invention, preferably, the detection means is NH ₃ concentration detection means provided near the upper ceiling wall of the drying stage.

  In the incinerator of the present invention, preferably, the detection means is NO concentration detection means provided in the secondary combustion chamber.

  In the incinerator of the present invention, preferably, the detecting means is a temperature detecting means for detecting the temperature of the upper part of the drying stage and the temperature of the upper part of the post-combustion drying stage.

  In the incinerator of the present invention, preferably, the gas supply angle adjusting means is a rectifying plate.

  The incinerator of the present invention preferably includes control means for inputting information detected by the detection means and controlling the gas supply angle adjustment means based on this information.

  In the operation method of the incinerator of the present invention, the supply angle of the recirculated exhaust gas supplied from the upper ceiling wall of the drying stage is changed according to the state of combustion of the waste in the primary combustion chamber. Controls the behavior of pyrolysis gas from the grate with a simple operation without changing the flow distribution of the recirculated exhaust gas from the upper ceiling wall and the rear wall of the drying stage even when the garbage combustion position changes can do. Moreover, it is considered that the control range is further widened in combination with a method of changing the flow rate distribution.

It is a schematic block diagram which shows the incinerator for incinerating garbage, such as a municipal waste. It is a figure for demonstrating the case where a baffle plate (10) is provided in the supply port (7a) of the drying stage upper ceiling wall. It is a figure which shows the outline of an expansion. It is a figure which shows the outline of a universal joint. Is a diagram showing an NH ₃ concentration in the case of Example 1 (-16 °). Is a diagram showing an NH ₃ concentration in the case of Example 3 (-8 °). Is a diagram showing an NH ₃ concentration in the case of Example 5 (0 °).

  Hereinafter, the operation method and the incinerator of the incinerator of the present invention will be described in detail based on the drawings.

  FIG. 1 is a schematic configuration diagram showing an incinerator for incineration of garbage such as municipal waste.

  The incinerator (1) has a form in which a lower primary combustion chamber (2) to which primary air is supplied communicates with an upper secondary combustion chamber (3) to which secondary air is supplied.

  A plurality of grate (4) are installed at the bottom of the primary combustion chamber (2). Garbage to be incinerated is carried into the primary combustion chamber (2) via the charging hopper (5). Therefore, the left side of the primary combustion chamber (2) shown in the figure is the side to which waste to be incinerated is supplied, and the grate (4) on the left side in the furnace in the drawing is used as a grate for drying.

  Each grate (4) is supplied with primary combustion air from below through a blower (6). The secondary combustion chamber (3) is supplied with secondary air for performing secondary combustion in the secondary combustion chamber (not shown).

  Above the primary combustion chamber (2), located above the drying stage upper ceiling wall (7) above the left grate (4) for drying and above the right grate (4) for post combustion. An opening formed between the rear combustion stage upper ceiling wall (9) serves as an inlet to the secondary combustion chamber (3), and the drying stage upper ceiling wall (7) and the primary combustion chamber (2) The exhaust gas discharged from the furnace outlet (13) provided at the rear of the secondary combustion chamber (2) is placed on the rear wall (8) on the wake side with respect to the direction of dust supply. ), A supply port is provided for supplying as recirculated exhaust gas. These supply ports may be provided at a single location or at a plurality of locations in each of the drying stage upper ceiling wall (7) and the rear wall (8).

  The recirculated exhaust gas is supplied at an arbitrary angle from each supply port toward the primary combustion chamber. In the present invention, the recirculated exhaust gas supplied into the primary combustion chamber (2) is supplied so as not to directly hit the furnace grate (4) and attract the gas generated by the combustion.

  In the present invention, the recirculated exhaust gas from the supply port provided in the drying stage upper ceiling wall (7) may be supplied with its supply angle changed according to the combustion state of the dust in the primary combustion chamber. Gas supply angle adjusting means for this purpose is provided.

  The gas supply angle adjusting means may be any device that can adjust the gas supply angle, and examples thereof include a rectifying plate, a universal joint, and an expansion. These are advantageous in that the angle can be automatically changed by remote control.

  FIG. 2 shows a case where a current plate (10) is provided at the supply port (7a) of the drying stage upper ceiling wall (7).

  As shown in FIG. 2, the supply angle (12) of the recirculated exhaust gas supplied from the supply port (7a) can be changed by appropriately adjusting the angle of the rectifying plate (10) (11).

  As another gas supply angle adjusting means, FIG. 3 shows an outline of expansion, and FIG. 4 shows an outline of a universal joint. The universal joint is a universal joint having a spherical joining surface. For example, a flexible pipe joint disclosed in Japanese Patent Publication No. 60-500728 is referred to.

  The supply angle of the recirculated exhaust gas supplied from the above-mentioned drying stage side supply port is controlled in the range of −16 ° to 0 ° with respect to the horizontal direction with the upward direction from the horizontal direction as a positive angle.

  Moreover, the supply angle of the recirculated exhaust gas supplied from the supply port on the rear wall side is fixed within a range of 10 ° to 30 °.

  More specifically, when the combustion position of the waste in the primary combustion chamber (2) moves to the drying stage side, that is, forward, the supply angle of the recirculated exhaust gas supplied from the drying stage supply port If the rectifying plate (10) is adjusted so as to face upward, conversely, if the combustion position of the dust in the primary combustion chamber (2) moves to the rear combustion stage side, that is, rearward, the drying stage The rectifying plate (10) is adjusted so that the supply angle of the recirculated exhaust gas supplied from the supply port on the side becomes more downward.

  Here, in order to adjust the supply angle of the recirculated exhaust gas supplied from the supply port on the drying stage side, the combustion state in the primary combustion chamber (2) is grasped. As means for that purpose, detection means for judging the state of combustion of the dust in the primary combustion chamber (2) is provided.

Examples of the detecting means include various kinds of means such as a CO concentration detecting means, a NO concentration detecting means, and an upper drying stage in the primary combustion chamber (2) provided in the secondary combustion chamber (3). Examples include NH ₃ concentration detection means provided, temperature detection means for detecting temperatures of the upper stage of the drying stage and the upper stage of the post combustion stage of the primary combustion chamber (2). More specifically, the NH ₃ concentration can be measured by a laser-type NH ₃ meter installed near the outlet of the primary combustion chamber (2).

  Table 1-1 and Table 1-2 show control methods for desirable detection positions, other effective detection positions, and detection results for each detection means.

  In the table, BF means a bug filter.

  Each of the detection means listed in the above table may be used alone, or two or more of these may be used in combination.

  The above description assumes that an operator who observes the combustion state of the primary combustion chamber (2) indicated by the detection means directly operates the gas supply angle adjustment means manually. A numerical value representing the combustion state in the primary combustion chamber (2) shown in FIG. 5 is input, and control means for controlling the gas supply angle adjusting means based on the input numerical value is provided to automatically control the angle. . In this way, it is possible to always keep the optimum angle.

  Hereinafter, various gas concentrations and temperatures at the outlets of the primary combustion chamber (2) and the secondary combustion chamber (3) were calculated by thermal fluid analysis using general-purpose software Fluent Ver.6.3. explain.

(Example)
-Calculation conditions In the present Example, it calculated about the conditions which changed the supply angle of the recirculation waste gas from a drying stage upper ceiling wall (7) targeting the inclination type stoker furnace (incineration scale: 150 t / d). Table 2 below shows common calculation conditions.

  Moreover, the supply angle of the recirculated exhaust gas supplied from the supply port provided in the rear wall (8) was fixed at 23 ° with respect to the horizontal direction.

When the supply angle of the recirculated exhaust gas from the upper ceiling wall (7) of the drying stage is −16 °, −12 °, −8 °, −4 ° and 0 ° (horizontal) with respect to the horizontal direction, The results obtained are shown in Table 3 below, and the NH ₃ concentration in the case of Example 1 (−16 °) is shown in FIG. ) Shows the NH ₃ concentration in FIG. 6, and FIG. 7 shows the NH ₃ in Example 5 (0 °).

  In Table 3, η represents the combustion efficiency.

As shown in Table 3, the supply angle of the recirculated exhaust gas supplied from the supply port (7a) of the drying stage upper ceiling wall (7) and the temperature, NH ₃ concentration, NO, secondary at the outlet of the primary combustion chamber There is a correlation between the CO concentration and NH ₃ concentration at the outlet of the combustion chamber. 5 to 7 also show that the NH ₃ concentration drawn toward the drying stage varies greatly depending on the supply angle of the recirculation gas.

In Example 1, the recirculated exhaust gas is supplied downward (−16 °). As a result, the amount of grate combustion gas flowing from the front side increases, and NH ₃ contained in the grate combustion gas is contained in the primary combustion chamber. High concentrations remain at the outlet of (2) and at the outlet of the secondary combustion chamber (3) (169 ppm and 67 ppm, respectively). However, the NO concentration at the furnace outlet (13) is low (2 ppm).

In Example 5, the recirculated exhaust gas is supplied in the horizontal direction (0 °). As a result, most of the grate combustion gas is attracted toward the rear wall (8), and NH contained in the grate combustion gas. ₃ burns. Therefore, the NH ₃ concentration at the outlet of the primary combustion chamber (2) was low (4 ppm) and the NO concentration was high (40 ppm). This also increased the NO concentration at the furnace outlet (13) (36 ppm).

In Examples 2 to 4, intermediate results between Example 1 and Example 5 were obtained for each value such as NH ₃ concentration.

Based on the above result, using this, for example, an NH ₃ concentration laser is provided on the upper ceiling wall (7) of the drying stage in the primary combustion chamber (2) so that the NH ₃ concentration at this position can be measured. Even if the combustion position in the primary combustion chamber (2) varies, the primary combustion is performed by changing the supply angle of the recirculated exhaust gas from the drying stage according to the NH ₃ concentration measured by this laser. The flow of gas in the chamber (2) can be controlled.

That is, when the combustion position in the primary combustion chamber (2) is on the front side (dry stage side), a lot of unburned gas passes through from the front (close to the dry stage). Since NH ₃ is contained in a high concentration, NH ₃ concentration laser measures such a high concentration of NH ₃ , and receives the measurement result to determine the gas flow in the primary combustion chamber (2). The supply angle of the recirculated exhaust gas is adjusted in the horizontal direction so as to be drawn toward the rear wall side. Conversely, when the combustion position in the primary combustion chamber (2) is on the rear side (rear wall side), the amount of combustion gas in the front grate (4) is reduced, and the NH ₃ on the drying stage side is reduced. In this case, the NO concentration on the rear side tends to increase, and therefore, in the primary combustion chamber (2) in response to the measurement result of the NH ₃ laser that measures the low concentration of NH ₃ , The recirculated exhaust gas supply angle is adjusted to be downward so that the gas flow is drawn forward.

  As described above, it is possible to control the behavior of the pyrolysis gas in the primary combustion chamber according to the combustion state in the primary combustion chamber by the incinerator of the present invention.

DESCRIPTION OF SYMBOLS 1 Incinerator 2 Primary combustion chamber 3 Secondary combustion chamber 4 Grate 5 Charge hopper 6 Blower 7 Drying stage upper ceiling wall 8 Rear wall 9 Rear combustion stage upper ceiling wall 10 Current plate 13 Furnace outlet

Claims (11)

A plurality of grate is provided at the bottom of the primary combustion chamber of the incinerator for incineration of garbage, and primary air for combustion is fed from the lower side of the grate, and the gas generated by the combustion of the garbage is primary. In an incinerator in which secondary air is sent to a secondary combustion chamber provided in the upper part of the combustion chamber and secondary air is sent to the secondary combustion chamber and secondary combustion is performed here, the secondary combustion chamber of the incinerator Exhaust gas discharged from the exhaust (hereinafter referred to as recirculated exhaust gas) is a ceiling wall (hereinafter referred to as a drying stage) located above the grate used for drying out of a plurality of grate provided at the bottom of the primary combustion chamber. It is supplied from the upper ceiling wall) and from the rear wall on the downstream side with respect to the dust supply direction in the primary combustion chamber so that it does not directly hit the furnace bottom grate and attracts the gas generated by combustion. Is a combustion operation method in an incinerator. Te,
Combustion in an incinerator that controls the behavior of pyrolysis gas in the primary combustion chamber by changing the supply angle of the recirculated exhaust gas supplied from the upper ceiling wall of the drying stage according to the state of dust in the primary combustion chamber how to drive.   When the combustion position of the waste in the primary combustion chamber moves to the drying stage side, that is, toward the front, the supply angle of the recirculated exhaust gas supplied from the upper ceiling wall of the drying stage is adjusted to be more upward and vice versa. In addition, when the combustion position of the waste in the primary combustion chamber moves to the rear combustion stage side, that is, rearward, the supply angle of the recirculated exhaust gas supplied from the upper ceiling wall of the drying stage is adjusted to be more downward. A combustion operation method in an incinerator according to claim 1.   The supply angle of the recirculated exhaust gas supplied from the drying stage upper ceiling wall is controlled in a range of -30 ° to 0 ° with respect to the horizontal direction, with the upward direction being a positive angle with respect to the horizontal direction. Or the combustion operation method in the incinerator of 2. A primary combustion chamber in which primary combustion of waste is performed, and a secondary combustion chamber provided in an upper portion of the primary combustion chamber in which secondary combustion is performed on gas generated by combustion of waste in the primary combustion chamber. A plurality of grate is provided at the bottom of the primary combustion chamber, and primary air used for the combustion of garbage is sent from the lower side of the grate to the secondary combustion chamber. An incinerator in which secondary air is sent to the secondary combustion chamber for secondary combustion of the gas generated by the combustion of waste,
The primary combustion chamber has recirculation exhaust gas supply means for supplying recirculation exhaust gas to the upper ceiling wall and the rear wall of the drying stage so as not to directly hit the grate at the bottom of the furnace and to attract the gas generated by the combustion. Each of the recirculation exhaust gas supply means provided on the upper ceiling wall of the drying stage changes the supply angle of the recirculation exhaust gas supplied from the upper ceiling wall of the drying stage according to the combustion state of the dust in the primary combustion chamber. An incinerator having gas supply angle adjustment means for   The incinerator of Claim 4 which has a detection means for judging the incineration state of the garbage in the said primary combustion chamber.   The incinerator according to claim 5, wherein the detection means is a CO concentration detection means provided in the secondary combustion chamber. The incinerator according to claim 5, wherein the detection means is NH ₃ concentration detection means provided near the upper ceiling wall of the drying stage.   The incinerator according to claim 5, wherein the detection means is a NO concentration detection means provided in the secondary combustion chamber.   6. The incinerator according to claim 5, wherein the detecting means is a temperature measuring means for detecting the temperature of the upper part of the drying stage and the temperature of the upper part of the post-combustion stage.   The incinerator according to any one of claims 4 to 9, wherein the gas supply angle adjusting means is a rectifying plate.   11. The incinerator according to claim 5, further comprising a control unit that inputs information detected by the detection unit and controls the gas supply angle adjustment unit based on the information.

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