JP5971438B1 - Boiler dust removing device and dust removing method - Google Patents

Abstract

An object of the present invention is to efficiently remove dust inside a boiler without using a soot blower and maintain the amount of heat collected by the boiler. Radiation heat from exhaust gas from upstream side, which is divided by two turning portions 21 and 22 which are connected to a waste incinerator 10 and bend the flow path of exhaust gas for heat recovery from the exhaust gas. In response to the heat exchange between the first radiation chamber 26, the second radiation chamber 28, and the exhaust heat and the convection heat transfer surface of the heat transfer tube, which are provided with a radiation heat transfer surface that generates steam upon receipt of the heat, further heat is generated. In order to remove dust adhering to the radiant heat transfer surface of the second radiant chamber 28 and the convective heat transfer surface of the convection heat transfer chamber 30 in the boiler 20 having the convection heat transfer chamber 30, fuel gas and oxidant gas are used. Pressure wave generators 61 to 64 that mix and burn under high pressure to generate pressure waves and release pressure waves into the boiler 20 are provided, and the pressure wave discharge nozzles of the pressure wave generators 61 to 64 are connected to the second radiation. 1 to 6 are disposed in the chamber 28, and the convection heat transfer chamber 30 is disposed. More than 6 or less disposed. [Selection] Figure 1

Description

  The present invention relates to a boiler dust removal apparatus and a dust removal method, and more particularly to a boiler dust removal apparatus and a dust removal method suitable for use in a garbage incineration facility having a power generation facility.

  In the operation of a waste incineration facility with power generation facilities, maintaining and improving the amount of power generated and sold is one of the most important items after the stable treatment of waste.

  Power generation at a waste incineration facility is performed by recovering heat from a high-temperature exhaust gas obtained from the combustion of waste in an incinerator and generating steam at a predetermined temperature and pressure and introducing it into a turbine generator. ing.

  The boiler has a radiant chamber having a radiant heat transfer surface that generates steam by receiving radiant heat from the exhaust gas, a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convective heat transfer surface of the heat transfer tube, and further superheats. It has.

  In the radiant chamber, a radiant heat transfer tube is provided as a radiant heat transfer surface through which heated water is circulated on the outside of the steel side wall surrounding the exhaust gas flow path to generate steam by radiant heating.

  In the convection heat transfer chamber, a heat transfer tube (also referred to as a superheater) that contacts the exhaust gas in the exhaust gas flow path to generate steam by convective heat transfer and further superheats is disposed as a convection heat transfer surface. The convection heat transfer surface is configured by arranging a plurality of heat transfer tube groups in which a plurality of heat transfer tubes are arranged in the horizontal direction in the height direction.

  The convection heat transfer chamber may be provided with an economizer having a heat transfer tube that heats water in the exhaust gas flow path to produce heated water.

  The exhaust gas generated in refuse incineration contains dust of small particle size including chlorine, sulfur, heavy metals, etc., but if these adhere to the radiant and convective heat transfer surfaces of the boiler, the adhering dust will be Since it acts as a heat insulating material, heat transfer efficiency decreases. Thereby, the heat recovery efficiency also decreases. As a result, the amount of steam generated decreases, and the amount of power generated by the turbine generator decreases. In addition, the gap between the heat transfer tubes may be blocked by adhering dust, which may hinder the flow of exhaust gas.

  For this reason, the equipment which removes adhering dust regularly is needed. As a technique for removing dust adhering to the convection heat transfer surface, a steam soot blower (SB) can be cited as an apparatus that has a proven record in coal boilers and many boilers. A steam soot blower injects water vapor from a plurality of nozzles toward a heat transfer tube to peel off and remove dust adhering to the surface of the heat transfer tube, and is injected at regular timing.

  The steam soot blower is effective in removing dust adhering to the heat transfer tube, but has the following problems.

(1) When water vapor is injected, water droplets that have condensed and remained in the piping of the soot blower device may be injected together. In this case, the heat transfer tube may be damaged as "drain attack". . In addition, in the element pipe that plays the role of the guide of the soot blower body installed in the boiler, the injected steam and water droplets dissolve the chlorine and sulfur in the adhering dust and adhere to the element pipe and corrode it. And cost for replacement. Although a protector for preventing this drain attack may be installed, the installation and replacement of this protector are also costly.

(2) When dust accumulates for a long time, the thickness of the dust accumulation layer increases. If it does so, it will become impossible to perform dust cooling at the heat exchanger tube surface temperature lower than exhaust gas temperature, and the dust accumulation layer surface temperature will rise. When the surface temperature of the dust accumulation layer rises and melts and adheres, it cannot be removed even with a soot blower, leading to boiler blockage.

(3) The induction blower is operated to guide the exhaust gas discharged from the incinerator to the chimney, and the incinerator internal pressure is maintained at a negative pressure. However, when the soot blower is operated, the amount of exhaust gas increases due to the injected steam. As a result, the pressure in the incinerator fluctuates greatly, changing from negative pressure to positive pressure, and there is a risk that gas and dust in the incinerator will be ejected.

(4) When the soot blower is operated, the exhaust gas temperature fluctuates greatly due to the injected steam, and the temperature at the inlet of the temperature reducing tower downstream from the boiler also fluctuates, making it impossible to control the cooling spray water amount and maintaining the exhaust gas temperature within a predetermined range. Can be difficult to do.

(5) Since the superheated steam injected by the soot blower uses a part of the superheated steam generated by the boiler, the amount of superheated steam supplied to the steam turbine decreases during operation of the soot blower, and the power generation amount decreases. Absent.

  In addition, it is difficult to remove dust adhering to the radiant heat transfer surface with a steam-type soot blower, and a scaffold is built in the radiant chamber when the waste incineration facility is out of operation, and removed manually. Therefore, the maintenance cost is high and a lot of time is required.

  In addition, due to the effect of dust adhering to the radiant heat transfer surface during operation of the waste incineration facility, the heat transfer efficiency of the radiant heat transfer surface decreases and the heat recovery rate decreases, and the downstream heat transfer tube group inlet gas temperature increases. As a result, the dust adhering to the heat transfer tube is fused and fixed, and even if the soot blower is used, efficient dust removal may be difficult.

  In order to solve these problems, a dust removal method for a boiler that does not use a steam soot blower has been studied, and a dust removal device using shock waves (see Patent Document 1) and a dust removal device using pressure waves (see Patent Document 2) are available. Are known.

  In the apparatus described in Patent Document 1, a shock wave launch tube that injects pressurized air for 0.5 seconds at 10 second intervals is provided in an exhaust gas heat exchanger, and shock waves are intermittently emitted toward the heat transfer tube. The dust adhering to the heat transfer tube surface is blown off and removed by the impact of.

  In the apparatus described in Patent Document 2, exhaust gas flow in a boiler is produced by a pressure wave generator composed of a detonator tube that mixes propane gas and air and ignites with an ignition plug, or a diesel engine that supplies exhaust gas. Gas is intermittently injected from the outside into the passage space at periodic intervals to send pressure waves into the exhaust gas passage space, causing pressure fluctuations, and effectively preventing dust from being damaged without damaging the boiler components. Suppresses adhesion.

JP 2001-141391 A Japanese Patent Application Laid-Open No. 2004-278921

  However, when removing dust adhering in a boiler using a shock wave or a pressure wave, the range of the effect is limited, and it is necessary to install a plurality of shock wave launch tubes and pressure wave generators. If the number of installed units is insufficient, the effect of removing adhering dust decreases. Moreover, if it installs excessively, an installation cost and a running cost will increase, and it is not preferable. As described above, Patent Documents 1 and 2 do not clarify an appropriate installation condition of the shock wave emission tube or the pressure wave generator.

  The present invention has been made in view of the above situation, and pressure waves are generated when dust is removed from the radiant heat transfer surface and the convection heat transfer surface of a boiler such as a waste incineration facility using a pressure wave. It is an object of the present invention to provide a dust removal apparatus and a dust removal method for a boiler that can be appropriately arranged and can be efficiently performed at low equipment costs and operation costs.

  In the present invention, steam is generated by receiving radiant heat from exhaust gas from the upstream side, which is divided by two turning sections that are connected to a waste incinerator and bend the flow path of exhaust gas for heat recovery from the exhaust gas. First and second radiation chambers having radiation heat transfer surfaces for generating heat, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheat, The convection heat transfer chamber removes dust adhering to the convection heat transfer surface of the convection heat transfer chamber with a boiler having a screen tube, secondary superheater, tertiary superheater and primary superheater from the upstream side in the exhaust gas flow direction. And a pressure wave generator for generating a pressure wave by mixing and burning fuel gas and an oxidant gas under high pressure and releasing the pressure wave into the boiler. The pressure wave discharge nozzle of the device, the screen And between said secondary superheater, by arranging between the tertiary superheater and the primary superheater, is obtained by solving the above problems.

  Here, the pressure wave discharge nozzle of the pressure wave generator is disposed between the screen tube and the secondary superheater and between the tertiary superheater and the primary superheater in the convection heat transfer chamber. By disposing the pressure wave discharge nozzle at each position of the convection heat transfer chamber, the convection heat transfer surface of the screen tube and the secondary superheater, and the tertiary superheater by the pressure wave discharged from the pressure wave discharge nozzle, This is because the convection heat transfer surface of the primary superheater can be subjected to vibration and wind pressure to peel and remove the attached dust. By arranging the pressure wave discharge nozzles at these two positions, it is possible to radiate the pressure wave to each of the components of the convection heat transfer chamber without any gap, and to reliably exert the effect of removing and removing the adhered dust by the pressure wave. Because it can.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. The convection heat transfer chamber is a boiler having a screen tube, a tertiary superheater, a secondary superheater and a primary superheater from the upstream side in the exhaust gas flow direction, and dust adhered to the convective heat transfer surface of the convection heat transfer chamber. In the boiler dust removal device for removing the pressure, a pressure wave generator for mixing the fuel gas and the oxidant gas under high pressure and burning them to generate a pressure wave and release the pressure wave into the boiler is provided. The pressure wave discharge nozzle of the wave generator is connected to the screen. And between the the down tube 3 primary superheater, by arranging between the primary superheater and the secondary superheater, it is obtained by solving the above problems as well.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. The convection heat transfer chamber is a boiler having a screen tube, a horizontal evaporation tube, a secondary superheater, a primary superheater and an economizer from the upstream side in the exhaust gas flow direction, and adhered to the convection heat transfer surface of the convection heat transfer chamber. A boiler dust removing apparatus for removing dust is provided with a pressure wave generating device that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and discharge the pressure wave into the boiler, Pressure wave discharge nozzle of pressure wave generator , And between the secondary superheater and the horizontal evaporation tube, by providing between the said primary superheater economizer, it is obtained by solving the above problems as well.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. The convection heat transfer chamber is a boiler having a screen tube, a secondary superheater, a primary superheater, a horizontal evaporator tube and an economizer from the upstream side in the exhaust gas flow direction, and is attached to the convection heat transfer surface of the convection heat transfer chamber. A boiler dust removing apparatus for removing dust is provided with a pressure wave generating device that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and discharge the pressure wave into the boiler, Pressure wave discharge nozzle of pressure wave generator , And between the secondary superheater and the screen tubes, by providing between the said horizontal evaporation tube economizer, it is obtained by solving the above problems as well.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. The convection heat transfer chamber is a boiler having a screen tube, a superheater, a first economizer and a second economizer from the upstream side in the exhaust gas flow direction to remove dust adhering to the convection heat transfer surface of the convection heat transfer chamber. In the boiler dust removal apparatus, a pressure wave generator is provided that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and discharge the pressure wave into the boiler. Pressure wave discharge nozzle in front And between the screen tube and the superheater, by arranging between the first economizer and the second economizer, it is obtained by solving the above problems as well.

  Here, when the height of the convection heat transfer chamber is 10 m or more and 20 m or less, the pressure wave discharge nozzles of the pressure wave generator are arranged in the height direction at intervals of 3 m or more and 7 m or less, and 2 or more and 6 or less. It can be arranged.

  This is because the pressure wave discharge nozzle height interval between 3 m and 7 m causes vibration and wind pressure on the convection heat transfer surface of the components of the convection heat transfer chamber due to the pressure wave discharged from the pressure wave discharge nozzle. This is because it is possible to provide a range in which the effect of peeling and removing the attached dust is received without causing a gap between the adjacent ranges. If the distance between the pressure wave discharge nozzles in the height direction is less than 3 m, the pressure waves discharged from the adjacent pressure wave discharge nozzles may interfere with each other and the effect of the pressure wave may be reduced, or the pressure wave discharge nozzle If the distance in the height direction is larger than 7 m, it is not preferable because a range in which the effect of the pressure wave reaches cannot be provided without a gap between the adjacent ranges.

  Further, by disposing at least two pressure wave discharge nozzles of the pressure wave generator in the convection heat transfer chamber, there is no place where the effect of the pressure wave does not occur, and the convection transfer of the components of the convection heat transfer chamber occurs. Adhering dust can be peeled and removed by applying vibration and wind pressure to the hot surface. When the width of the convection heat transfer chamber is large, it is preferable to arrange a plurality of pressure wave discharge nozzles at the same height position. On the other hand, if more than seven pressure wave discharge nozzles are arranged, pressure waves emitted from adjacent pressure wave discharge nozzles may interfere with each other, resulting in a decrease in the effect of pressure waves, or more than seven pressure wave discharge nozzles. However, the effect of peeling and removing the adhering dust does not increase, and on the contrary, there is a problem that the apparatus cost and the operating cost increase, which is not preferable.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. In the boiler dust removal apparatus for removing dust adhering to the convection heat transfer surface of the convection heat transfer chamber in a boiler having a height of the convection heat transfer chamber of 10 m or more and 20 m or less, fuel gas and oxidant A pressure wave generator that mixes and burns gas under high pressure to generate a pressure wave and discharges the pressure wave into the boiler is provided, and a pressure wave discharge nozzle of the pressure wave generator is installed in the convection heat transfer chamber. 2 or more 6 in the vertical direction spacing 3m or more and 7m or less By disposing the following is obtained by solving the above problems as well.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. A boiler in which the height of the second radiation chamber is 10 m or more and 20 m or less and the height of the convection heat transfer chamber is 10 m or more and 20 m or less, and the radiation heat transfer surface of the second radiation chamber and the convection heat transfer chamber In a boiler dust removal device for removing dust adhering to the convection heat transfer surface of a boiler, pressure is generated by mixing a fuel gas and an oxidant gas under high pressure and burning them to generate pressure waves and release pressure waves into the boiler A wave generator and a pressure of the pressure wave generator By disposing 1 to 6 discharge nozzles in the second radiation chamber and disposing 2 to 6 in the convection heat transfer chamber at a height direction disposition of 3 m to 7 m, Similarly, the problem is solved.

  Here, the pressure wave discharge nozzles of the pressure wave generator are disposed in the convection heat transfer chamber in the height direction at intervals of 3 m or more and 7 m or less, and 2 or more and 6 or less, or the second radiation chamber 1 The arrangement of 6 or more and 6 or less, and the arrangement of 2 or more and 6 or less in the convection heat transfer chamber with an arrangement interval in the height direction of 3 m or more and 7 m or less is based on the following grounds.

  That is, by setting the height direction interval of the pressure wave discharge nozzles disposed in the convection heat transfer chamber to 3 m or more and 7 m or less, the convection of the components of the convection heat transfer chamber is caused by the pressure waves discharged from the pressure wave discharge nozzle. This is because it is possible to provide a range in which the heat transfer surface is subjected to vibration and wind pressure to peel and remove the adhering dust without causing a gap between the adjacent ranges. If the distance between the pressure wave discharge nozzles in the height direction is less than 3 m, the pressure waves discharged from the adjacent pressure wave discharge nozzles may interfere with each other and the effect of the pressure wave may be reduced, or the pressure wave discharge nozzle If the distance in the height direction is larger than 7 m, it is not preferable because a range in which the effect of the pressure wave reaches cannot be provided without a gap between the adjacent ranges.

  By disposing more than the minimum number of pressure wave discharge nozzles, the action of peeling and removing adhering dust by receiving vibration and wind pressure on the radiation heat transfer surface or convection heat transfer surface by the pressure wave discharged from the pressure wave discharge nozzle This is because the range can be provided without a gap between adjacent ranges. On the other hand, if the number is more than the upper limit, the pressure waves emitted from the adjacent pressure wave discharge nozzles may interfere with each other and the action effect of the pressure wave may be reduced, or even if the number exceeds the upper limit, the adhesion will occur. This is not preferable because there is a problem that the device cost and the operation cost increase without increasing the effect of peeling and removing dust.

  Furthermore, the pressure wave discharge nozzle can also be disposed in a separate economizer that is provided downstream of the boiler and that heats water supplied to the boiler.

  By discharging a pressure wave with the pressure wave discharge nozzle disposed in the separate economizer, dust adhered to a plurality of economizers in the separate economizer can be peeled and removed.

  Furthermore, the pressure wave discharge nozzle can be disposed at the manhole position. By installing the pressure wave discharge nozzle at the manhole position and attaching the pressure wave discharge nozzle to the manhole cover, the pressure wave generator can be easily installed, reducing the installation cost and maintenance cost. be able to.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. The convection heat transfer chamber is a boiler having a screen tube, a secondary superheater, a tertiary superheater, and a primary superheater from the upstream side in the exhaust gas flow direction, and is attached to the convective heat transfer surface of the convection heat transfer chamber. When the gas is removed, the screen tube and the secondary superheater are mixed using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and discharge the pressure wave into the boiler. And between the tertiary superheater and the primary superheater. From the pressure wave emission nozzle, there is provided a dust removing method of a boiler, characterized in that to release the pressure wave to the convective heat transfer chamber.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. The convection heat transfer chamber is a boiler having a screen tube, a tertiary superheater, a secondary superheater and a primary superheater from the upstream side in the exhaust gas flow direction, and dust adhered to the convective heat transfer surface of the convection heat transfer chamber. When the gas is removed, the screen tube and the tertiary superheater are mixed using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and release the pressure wave into the boiler. Between the secondary heater and between the secondary superheater and the primary superheater. From the pressure wave emission nozzle, there is provided a dust removing method of a boiler, characterized in that to release the pressure wave to the convective heat transfer chamber.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. The convection heat transfer chamber is a boiler having a screen tube, a horizontal evaporation tube, a secondary superheater, a primary superheater and an economizer from the upstream side in the exhaust gas flow direction, and adhered to the convection heat transfer surface of the convection heat transfer chamber. When removing dust, the horizontal evaporating pipe and the 2 are used by using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and discharge the pressure wave into the boiler. Between the secondary superheater, the primary superheater and the economizer From arranged pressure wave discharge nozzle during, there is provided a dust removing method of a boiler, characterized in that to release the pressure wave to the convective heat transfer chamber.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. The convection heat transfer chamber is a boiler having a screen tube, a secondary superheater, a primary superheater, a horizontal evaporator tube and an economizer from the upstream side in the exhaust gas flow direction, and is attached to the convection heat transfer surface of the convection heat transfer chamber. When removing dust, a pressure wave generator that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and discharge the pressure wave into the boiler is used. Between the superheater, the horizontal evaporator tube and the economy There is provided a dust removing method of a boiler, characterized in that the pressure wave discharge nozzle, releasing a pressure wave in the convective heat transfer chamber disposed between.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. When the convection heat transfer chamber is a boiler having a screen tube, a superheater, a first economizer and a second economizer from the upstream side in the exhaust gas flow direction, dust attached to the convection heat transfer surface of the convection heat transfer chamber is removed. In addition, using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and discharge the pressure wave into the boiler, between the screen tube and the superheater, The first economizer and the second economizer There is provided a dust removing method of a boiler, characterized in that the pressure wave discharge nozzle, releasing a pressure wave in the convective heat transfer chamber arranged between the between.

  Here, when the height of the convection heat transfer chamber is 10 m or more and 20 m or less, the pressure wave is arranged in the convection heat transfer chamber with a height direction interval of 3 m or more and 7 m or less and 2 or more and 6 or less. A pressure wave can be discharged from the discharge nozzle into the convection heat transfer chamber.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. When removing dust adhering to the convection heat transfer surface of the convection heat transfer chamber, the fuel gas and the oxidant gas are mixed under high pressure in a boiler having a convection heat transfer chamber height of 10 m to 20 m. Using a pressure wave generator that generates pressure waves by combustion and discharges the pressure waves into the boiler, the convection heat transfer chamber has a height direction interval of 3 m or more and 7 m or less, and 2 or more and 6 or less. A pressure wave discharge nozzle provided to discharge a pressure wave into the convection heat transfer chamber. There is provided a dust removing method of a boiler to symptoms.

  The present invention also receives radiant heat from the exhaust gas from the upstream side, which is divided by two turning portions that are connected to a waste incinerator and bends the flow path of the exhaust gas for heat recovery from the exhaust gas. First and second radiant chambers having radiant heat transfer surfaces for generating steam, and convection heat transfer chambers that generate steam by heat exchange between the exhaust gas and the convective heat transfer surfaces of the heat transfer tubes and further superheat. The convection between the radiation heat transfer surface of the radiation chamber and the convection heat transfer chamber is a boiler having a height of the second radiation chamber of 10 m to 20 m and a height of the convection heat transfer chamber of 10 m to 20 m. When removing dust adhering to the heat transfer surface, using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and release the pressure wave into the boiler, 1 to 6 in the second radiant chamber, the height direction in the convection heat transfer chamber A dust removing method for a boiler, characterized in that pressure waves are discharged into the second radiation chamber and the convection heat transfer chamber from pressure wave discharge nozzles arranged at intervals of 3 m or more and 7 m or less and 2 or more and 6 or less. Is to provide.

  Here, a pressure wave can also be discharged into a separate economizer that is provided downstream of the boiler and that heats water supplied to the boiler.

  Moreover, a pressure wave can be emitted from a pressure wave discharge nozzle disposed at the manhole position.

  According to the present invention, for example, when removing dust on the radiation heat transfer surface and the convection heat transfer surface of a waste incineration facility boiler using a pressure wave, the pressure wave generator can be appropriately disposed, and the dust removal Can be performed efficiently and at low equipment and operating costs.

  Further, according to the present invention, it is possible to efficiently remove dust adhering to the boiler inner wall without operating the soot blower during operation of the boiler, and the amount of heat collected by the boiler can be maintained. Since the operation of the soot blower is eliminated, the above-described corrosion / thinning trouble caused by the drain attack is eliminated, which is economical. In addition, the above-mentioned problems that occur when using a soot blower can be prevented.

  The soot blower is generally operated once or twice per day, whereas the pressure wave generator is operated at least once in 1 to 6 hours. That is, dust is removed in a short time. As a result, the amount of dust adhering can be reduced, so that it is possible to prevent the corrosion of the boiler inner wall surface and heat transfer tube surface due to heavy metals and salts contained in the adhering dust, thereby reducing maintenance costs. This makes it possible to operate a waste incineration facility boiler that is easy to manage. In addition, the installation of the minimum necessary pressure wave generator enables the operation of the apparatus which is economically advantageous.

Sectional drawing which shows the structure of embodiment of this invention The figure which shows the arrangement | positioning position of the pressure wave discharge nozzle of the convection heat transfer chamber which is embodiment of this invention. The figure which shows the driving | running state of the (A) Example and (B) comparative example of this invention

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by the content described in the following embodiment and an Example. In addition, the constituent elements in the embodiments and examples described below include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in the so-called equivalent range. Furthermore, the constituent elements disclosed in the embodiments and examples described below may be appropriately combined or may be appropriately selected and used.

  As shown in FIG. 1 to which the present invention is applied, a boiler 20 connected to an incinerator 10 for recovering heat from exhaust gas is divided by two turning portions 21 and 22 that bend the flow path of the exhaust gas. The first radiation chamber 26, the second radiation chamber 28, and the convection heat transfer chamber 30 are provided from the upstream side in the exhaust gas flow direction. A gas mixing chamber 24 is provided in the vicinity of the inlet of the first radiation chamber 26 that receives exhaust gas from the incinerator 10. The exhaust gas introduced from the incinerator 10 flows from the lower side of the first radiation chamber 26 to the upper side, from the upper side to the lower side of the second radiation chamber 28, and from the lower side to the upper side of the convection heat transfer chamber 30.

  The first radiation chamber 26 and the second radiation chamber 28 are each provided with a radiation heat transfer surface that generates radiant heat from the exhaust gas and generates steam.

  The convection heat transfer chamber 30 includes a screen tube 32, a secondary superheater 34, a tertiary superheater 36, a primary superheater 38, and a second economizer 42 from the upstream side in the exhaust gas flow direction. Each of the secondary superheater 34, the tertiary superheater 36, and the primary superheater 38 includes a heat transfer tube group in which a plurality of heat transfer tubes arranged in the horizontal direction are provided in multiple stages in the height direction. A convection heat transfer surface is formed, and steam is generated by heat exchange with the exhaust gas to further overheat. The screen tube 32 is provided with a heat transfer tube in a flag shape and cools the exhaust gas introduced into the convection heat transfer chamber 30.

  A separate economizer 50 is connected to the downstream side of the boiler 20. A first economizer 51 is disposed in the separate economizer 50, and a heat transfer pipe is disposed in the first economizer 51 of the separate economizer 50 and the second economizer 42 of the convection heat transfer chamber 30 to exchange heat with the exhaust gas. As a result, the water is heated and heated water is generated and supplied to the boiler 20.

  In the present embodiment, the fuel gas for removing dust adhering to the radiant heat transfer surface of the second radiant chamber 28, the convective heat transfer surface of the convective heat transfer chamber 30, and the heat transfer surface of the first economizer 51. (For example, methane gas) and oxidant gas (for example, oxygen gas) are mixed in a mixed gas holder under high pressure, and are ignited by, for example, a spark plug, explode and burned to generate a pressure wave, and from the pressure wave discharge nozzle (not shown) inside the boiler There are provided four pressure wave generators 61 to 64 for releasing pressure waves.

  In the figure, 70 is a control panel.

  Here, the pressure wave discharge nozzle of the pressure wave generator 61 is disposed in the vicinity of the radiation heat transfer surface of the second radiation chamber 28, and the pressure wave discharge nozzles of the pressure wave generators 62 and 63 are the convection heat transfer. The pressure wave discharge nozzle of the pressure wave generator 64 is disposed in the vicinity of the convection heat transfer surface of the chamber 30, and is disposed on the uppermost portion of the first economizer 51.

  The pressure wave discharge nozzles of the pressure wave generators 62 and 63 provided in the convection heat transfer chamber 30 are respectively between the screen tube 32 and the secondary superheater 34, and the tertiary superheater 36 and the primary superheater 38. Between the two. Further, pressure wave discharge nozzles can be attached to manholes (not shown) provided at these positions.

  Here, when the height of the convection heat transfer chamber 30 is not less than 10 m and not more than 20 m, the arrangement interval in the height direction of the pressure wave discharge nozzles of the pressure wave generators 62 and 63 provided in the convection heat transfer chamber 30 is 3 m. It can be set to 7 m or less.

  In response to an instruction given from the control panel 70, the pressure wave generators 61 to 64 ignite the mixed gas with a spark plug to generate a pressure wave.

  Specifically, methane gas and oxygen gas are filled and mixed in a mixed gas holder of a pressure wave generator, ignited with a spark plug, and explosively burned. The pressure in the mixed gas holder during the explosion combustion reaches, for example, a maximum of 53.2 bar. Thereby, a pressure wave is discharged into the boiler 20 from the tip of the pressure wave discharge nozzle in the boiler 20. At that time, vibration and wind pressure are applied to the radiation heat transfer surface and the convection heat transfer surface, and the attached dust is peeled off and removed. The range in which the pressure wave emitted from the pressure wave discharge nozzle gives vibration and wind pressure to the extent that the attached dust is separated from the radiation heat transfer surface and the convection heat transfer surface is 3.5 m upward and downward from the pressure wave discharge nozzle, respectively. The range of the degree. Therefore, it is preferable that the height direction interval of the pressure wave discharge nozzles in the radiant heat transfer chamber and the convection heat transfer chamber is 7 m or less, and the range in which the adhered dust is separated is between the adjacent ranges. It can be provided without a gap. Furthermore, it is preferable that the height wave interval between the pressure wave discharge nozzles is 3 m or more, and the pressure waves discharged from the adjacent pressure wave discharge nozzles interfere with each other, and the adhesion of the pressure wave discharge nozzles is not reduced. Dust can be reliably peeled off. Thus, in order to give sufficient vibration and wind pressure to the heat transfer tube group of the convection heat transfer chamber, it is preferable to set the distance between the pressure wave discharge nozzles in the height direction to 3 m or more and 7 m or less.

  In FIG. 2, the arrangement | positioning position of the pressure wave discharge nozzle in the convection heat transfer chamber 30 which is embodiment of this invention is shown. The embodiment A is a boiler in which the convection heat transfer chamber 30 has a screen tube 32, a secondary superheater 34, a tertiary superheater 36, and a primary superheater 38 from the upstream side in the exhaust gas flow direction. In a boiler dust removal device for removing dust adhering to the convection heat transfer surface of a boiler, pressure is generated by mixing a fuel gas and an oxidant gas under high pressure and burning them to generate pressure waves and release pressure waves into the boiler A wave generator is provided, and a pressure wave discharge nozzle of the pressure wave generator is provided between the screen tube 32 and the secondary superheater 34, and between the tertiary superheater 36 and the primary superheater 38. It is arranged in between.

  A second economizer 42 is provided on the downstream side (that is, the most downstream side) of the primary superheater 38 as in the embodiment A ′, or the primary superheater is also the same as in the embodiment A ″. A horizontal evaporation pipe 44 may be provided on the downstream side of 38 (that is, the most downstream side).

  Here, the horizontal evaporation pipe 44 is a heat transfer pipe that heats water heated by an economizer and generates steam.

  The embodiment A ′ ″ is a boiler 20 in which the convection heat transfer chamber 30 has a screen tube 32, a tertiary superheater 36, a secondary superheater 34, and a primary superheater 38 from the upstream side in the exhaust gas flow direction. Pressure wave discharge nozzles of the generator are arranged between the screen tube 32 and the tertiary superheater 36 and between the secondary superheater 34 and the primary superheater 38. Further, a second economizer 42 is provided on the downstream side (that is, the most downstream side) of the primary superheater 38, and a horizontal evaporation pipe 44 is also provided on the downstream side (that is, the most downstream side) of the primary superheater 38. It may be provided.

  The embodiment B is a boiler in which the convection heat transfer chamber 30 includes a screen tube 32, a horizontal evaporation tube 44, a secondary superheater 34, a primary superheater 38, and a second economizer 42 from the upstream side in the exhaust gas flow direction. In the dust removal device of the boiler 20 for removing dust adhering to the convection heat transfer surface of the convection heat transfer chamber 30, fuel gas and oxidant gas are mixed under high pressure and burned to generate pressure waves into the boiler. A pressure wave generating device that discharges a pressure wave is provided, and a pressure wave discharging nozzle of the pressure wave generating device is provided between the horizontal evaporation pipe 44 and the secondary superheater 34, the primary superheater 38, and the It is arranged between the second economizer 42.

  In Embodiments A, A ′, A ″, A ′ ″, and B, the separate economizer 50 shown in FIG. 1 is provided, and the first economizer 51 is provided therein.

  Next, Embodiments B ′, C, and D in which the first economizer 51 and the second economizer 42 are provided in the convection heat transfer chamber 30 without providing the separate economizer 50 will be described.

  In the embodiment B ′, the first economizer 51 is provided on the downstream side (that is, the most downstream side) of the second economizer 42 in the convection heat transfer chamber 30 in the same configuration as the embodiment B. Similarly, pressure wave discharge nozzles of the pressure wave generator are arranged between the horizontal evaporator tube 44 and the secondary superheater 34, and between the primary superheater 38 and the second economizer 42. ing.

  In the embodiment C, the convection heat transfer chamber 30 is arranged from the upstream side in the exhaust gas flow direction to the screen tube 32, the secondary superheater 34, the primary superheater 38, the horizontal evaporation tube 44 and the first and second economizers 51, In the boiler dust removing apparatus for removing dust adhering to the convection heat transfer surface of the convection heat transfer chamber 30 in a boiler having 42, fuel gas and oxidant gas are mixed and burned under high pressure to generate pressure waves And a pressure wave generating device for emitting pressure waves into the boiler is provided, and the pressure wave discharging nozzle of the pressure wave generating device is disposed between the screen tube 32 and the secondary superheater 34 and the horizontal evaporation. It is disposed between the pipe 44 and the first economizer 51.

  Embodiment D is a boiler in which the convection heat transfer chamber 30 includes a screen tube 32, a superheater 46, a first economizer 51, and a second economizer 42 from the upstream side in the exhaust gas flow direction. In a boiler dust removal device for removing dust adhering to a convection heat transfer surface, a pressure wave is generated by mixing fuel gas and oxidant gas under high pressure and burning them to generate pressure waves and release pressure waves into the boiler A generator is provided, and a pressure wave discharge nozzle of the pressure wave generator is disposed between the screen tube 32 and the superheater 46, and between the first economizer 51 and the second economizer. ing.

  In Embodiments A, A ′, A ″, A ′ ″ and D, the steam generated by heating on the radiant heat transfer surface of the radiant chamber is supplied to the superheater of the convection heat transfer chamber 30 to heat the steam. However, when the horizontal evaporation pipe 44 is provided as in Embodiments B, B ′, and C, steam is also generated in the convection heat transfer chamber 30.

  In addition, the height of the convection heat transfer chamber 30 may be 10 m or more and 20 m or less, and the distance between the pressure wave discharge nozzles in the height direction may be 3 m or more and 7 m or less.

  Here, the embodiments A, A ′, A ″ correspond to claim 1, the embodiment A ′ ″ corresponds to claim 2, the embodiments B, B ′ correspond to claim 3, and the embodiments C corresponds to claim 4, and the embodiment D corresponds to claim 5.

  As shown in FIG. 1, four pressure wave generators 61 to 64 are disposed in the boiler 20 corresponding to the embodiment A ′ connected to the municipal waste incinerator 10. The incinerator is a continuous operation.

  The pressure wave was released by the pressure wave generators 61 to 64 at a frequency of once every 2 hours for 70 days, and the time-dependent change in the exhaust gas temperature at the outlet of the first economizer 51 was measured. The result shown in FIG. was gotten. The horizontal axis is the operating time.

  On the other hand, as a comparative example, the time-dependent change in the exhaust gas temperature at the outlet of the first economizer 51 when dust was removed by a soot blower was measured, and the result shown in FIG. 3B was obtained. In the comparative example, the soot blower was operated when the exhaust gas temperature measurement value at the outlet of the first economizer 51 rose above the set value.

  As can be seen from FIG. 3, the average value of the exhaust gas temperature at the outlet of the first economizer 51 is 224 ° C. in the example and 219 ° C. in the comparative example. This means that the heat transfer efficiency is reduced and the reduction of dust attached to the heat transfer surface according to the present invention can be confirmed to be equivalent to the dust removal by the soot blower. It was.

  In the embodiment, when the pressure wave discharge dust removal operation is performed once every two hours, the dust removal interval is short and the decrease in heat transfer efficiency is small, so the fluctuation of the outlet temperature of the first economizer 51 is reduced. This shows that the fluctuation in the amount of heat collected in the boiler 20 is small, and it has been confirmed that this leads to stabilization of the amount of steam generated.

  On the other hand, in the comparative example, when the exhaust gas temperature measurement value at the outlet of the first economizer 51 rises to the set value or more, the soot blower operates, so that dust is removed at a frequency of about once every 12 to 24 hours. Since the amount of dust is large and the decrease in heat transfer efficiency is large, the variation in the temperature at the outlet of the first economizer 51 is large, indicating that the variation in the amount of heat collected in the boiler 20 is large.

  It is preferable to perform the pressure wave discharge dust removal operation once every 1 to 6 hours because dust can be removed while the adhesion to the heat transfer surface is slight, and once every 2 to 3 hours. It is more preferable to be able to remove the dust in a shorter time and reliably suppress the occurrence of problems due to dust adhesion.

  In this way, according to the present invention, dust inside the boiler 20 can be effectively removed without using a soot blower, and the amount of heat collected by the boiler 20 can be maintained to prevent problems that occur when using a soot blower. be able to.

  In the above embodiment, one pressure wave discharge nozzle is disposed in the second radiation chamber 28, two in the convection heat transfer chamber 30, and one in the first economizer 51. The installation position and the number are not limited to this, and the pressure wave discharge nozzles of the second radiation chamber 28 and the first economizer 51 may be omitted, or one pressure wave discharge nozzle may be disposed in the convection heat transfer chamber 30. .

  Moreover, in the said Example, although this invention was applied to the boiler connected with the municipal waste incinerator, the application object of this invention is not limited to this.

DESCRIPTION OF SYMBOLS 10 ... Incinerator 20 ... Boiler 21, 22 ... Turning part 26 ... 1st radiation chamber 28 ... 2nd radiation chamber 30 ... Convection heat transfer chamber 32 ... Screen tube 34 ... Secondary superheater 36 ... Tertiary superheater 38 ... Primary superheater 42 ... second economizer 44 ... horizontal evaporation pipe 46 ... superheater 50 ... separate economizer 51 ... first economizer 61-64 ... pressure wave generator 70 ... control panel

Claims (20)

Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats Is a boiler having a screen tube, a secondary superheater, a tertiary superheater and a primary superheater from the upstream side in the exhaust gas flow direction, and a boiler for removing dust adhering to the convective heat transfer surface of the convection heat transfer chamber In the dust removal device of
While providing a pressure wave generator that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and release the pressure wave into the boiler,
A boiler characterized in that pressure wave discharge nozzles of the pressure wave generator are disposed between the screen tube and the secondary superheater, and between the tertiary superheater and the primary superheater. Dust removal equipment. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats Is a boiler having a screen tube, a tertiary superheater, a secondary superheater and a primary superheater from the upstream side in the exhaust gas flow direction, and a boiler for removing dust adhering to the convective heat transfer surface of the convection heat transfer chamber In the dust removal device of
While providing a pressure wave generator that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and release the pressure wave into the boiler,
A boiler in which the pressure wave discharge nozzle of the pressure wave generator is disposed between the screen tube and the tertiary superheater, and between the secondary superheater and the primary superheater. Dust removal equipment. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats Is a boiler having a screen tube, a horizontal evaporator tube, a secondary superheater, a primary superheater and an economizer from the upstream side in the exhaust gas flow direction for removing dust adhering to the convective heat transfer surface of the convection heat transfer chamber In boiler dust removal equipment,
While providing a pressure wave generator that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and release the pressure wave into the boiler,
The dust of a boiler, wherein the pressure wave discharge nozzle of the pressure wave generator is disposed between the horizontal evaporator tube and the secondary superheater, and between the primary superheater and the economizer. Removal device. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats Is a boiler having a screen tube, a secondary superheater, a primary superheater, a horizontal evaporator tube and an economizer from the upstream side in the exhaust gas flow direction, for removing dust adhering to the convection heat transfer surface of the convection heat transfer chamber In boiler dust removal equipment,
While providing a pressure wave generator that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and release the pressure wave into the boiler,
A dust removing device for a boiler, characterized in that pressure wave discharge nozzles of the pressure wave generating device are disposed between the screen tube and the secondary superheater, and between the horizontal evaporation tube and the economizer. . Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats Is a boiler having a screen tube, a superheater, a first economizer, and a second economizer from the upstream side in the exhaust gas flow direction, and removes the dust adhering to the convective heat transfer surface of the convection heat transfer chamber. In
While providing a pressure wave generator that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and release the pressure wave into the boiler,
A dust removing device for a boiler, characterized in that a pressure wave discharge nozzle of the pressure wave generating device is disposed between the screen tube and the superheater, and between the first economizer and the second economizer. .   The height of the convection heat transfer chamber is not less than 10 m and not more than 20 m, and the pressure wave discharge nozzles of the pressure wave generating device are disposed in the height direction at intervals of not less than 3 m and not more than 7 m, and not less than 2 and not more than 6. The boiler dust removing apparatus according to any one of claims 1 to 5, wherein Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats In the boiler dust removal apparatus for removing dust adhering to the convection heat transfer surface of the convection heat transfer chamber in a boiler having a height of 10 m or more and 20 m or less,
While providing a pressure wave generator that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and release the pressure wave into the boiler,
2. A dust removing apparatus for a boiler, wherein two or more pressure wave discharge nozzles of the pressure wave generator are disposed in the convection heat transfer chamber at a height direction interval of 3 m or more and 7 m or less. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A first and second radiation chamber having a heat transfer surface; and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surface of the heat transfer tube and further superheats, the second radiation chamber. In which the height of the convection heat transfer chamber is 10 m or more and 20 m or less, and is attached to the radiant heat transfer surface of the radiant chamber and the convective heat transfer surface of the convection heat transfer chamber. In a boiler dust removal device for removing dust,
While providing a pressure wave generator that mixes fuel gas and oxidant gas under high pressure and burns to generate a pressure wave and release the pressure wave into the boiler,
One or more pressure wave discharge nozzles of the pressure wave generating device are disposed in the second radiation chamber, and two or more pressure waves are disposed in the convection heat transfer chamber in a height direction interval of 3 m to 7 m. A dust removing device for a boiler, wherein the dust removing device is arranged in the number of pieces.   9. The pressure wave discharge nozzle is also disposed in a separate economizer that is provided downstream of the boiler and that heats water supplied to the boiler. The boiler dust removal apparatus as described.   The boiler dust removing device according to any one of claims 1 to 9, wherein the pressure wave discharge nozzle is disposed at a manhole position. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats Is a boiler having a screen tube, a secondary superheater, a tertiary superheater and a primary superheater from the upstream side in the exhaust gas flow direction, when removing dust adhering to the convective heat transfer surface of the convection heat transfer chamber,
Using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and release the pressure wave into the boiler,
A pressure wave is discharged into the convection heat transfer chamber from a pressure wave discharge nozzle disposed between the screen tube and the secondary superheater and between the tertiary superheater and the primary superheater. A method for removing dust from a boiler. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats Is a boiler having a screen tube, a tertiary superheater, a secondary superheater and a primary superheater from the upstream side in the exhaust gas flow direction, when removing dust adhering to the convective heat transfer surface of the convection heat transfer chamber,
Using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and release the pressure wave into the boiler,
A pressure wave is discharged into the convection heat transfer chamber from a pressure wave discharge nozzle disposed between the screen tube and the tertiary superheater and between the secondary superheater and the primary superheater. A method for removing dust from a boiler. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats When removing dust adhering to the convection heat transfer surface of the convection heat transfer chamber with a boiler having a screen tube, horizontal evaporator tube, secondary superheater, primary superheater and economizer from the upstream side in the exhaust gas flow direction ,
Using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and release the pressure wave into the boiler,
Discharging pressure waves into the convection heat transfer chamber from pressure wave discharge nozzles disposed between the horizontal evaporator pipe and the secondary superheater and between the primary superheater and the economizer. A method for removing dust from a boiler. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats When removing dust adhering to the convection heat transfer surface of the convection heat transfer chamber with a boiler having a screen tube, secondary superheater, primary superheater, horizontal evaporator tube and economizer from the upstream side in the exhaust gas flow direction ,
Using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and release the pressure wave into the boiler,
A pressure wave is discharged into the convection heat transfer chamber from a pressure wave discharge nozzle disposed between the screen tube and the secondary superheater, and between the horizontal evaporator tube and the economizer. To remove dust from boiler. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats Is a boiler having a screen tube, a superheater, a first economizer and a second economizer from the upstream side in the exhaust gas flow direction, when removing dust adhering to the convection heat transfer surface of the convection heat transfer chamber,
Using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and release the pressure wave into the boiler,
A pressure wave is discharged into the convection heat transfer chamber from a pressure wave discharge nozzle disposed between the screen tube and the superheater and between the first economizer and the second economizer. A method for removing dust from a boiler.   A pressure wave discharge nozzle in which the height of the convection heat transfer chamber is 10 m or more and 20 m or less, and the arrangement distance in the height direction is 3 m or more and 7 m or less and 2 or more and 6 or less in the convection heat transfer chamber; The method for removing dust from a boiler according to any one of claims 11 to 15, wherein pressure waves are discharged into the convection heat transfer chamber. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A convection heat transfer chamber provided with first and second radiation chambers having heat transfer surfaces, and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surfaces of the heat transfer tubes and further superheats When removing dust adhering to the convection heat transfer surface of the convection heat transfer chamber with a boiler having a height of 10 m to 20 m,
Using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and release the pressure wave into the boiler,
A pressure wave is discharged into the convection heat transfer chamber from a pressure wave discharge nozzle disposed in the convection heat transfer chamber with a height arrangement interval of 3 m or more and 7 m or less and 2 or more and 6 or less. Boiler dust removal method. Radiation that generates steam by receiving radiant heat from the exhaust gas from the upstream side, separated by two turning sections that bend the flow path of the exhaust gas, connected to the waste incinerator to recover heat from the exhaust gas A first and second radiation chamber having a heat transfer surface; and a convection heat transfer chamber that generates steam by heat exchange between the exhaust gas and the convection heat transfer surface of the heat transfer tube and further superheats, the second radiation chamber. In which the height of the convection heat transfer chamber is 10 m or more and 20 m or less, and is attached to the radiant heat transfer surface of the radiant chamber and the convective heat transfer surface of the convection heat transfer chamber. When removing dust,
Using a pressure wave generator that mixes and burns fuel gas and oxidant gas under high pressure to generate a pressure wave and release the pressure wave into the boiler,
From the pressure wave discharge nozzle disposed in the second radiation chamber from 1 to 6 and disposed in the convection heat transfer chamber in the height direction interval of 3 m to 7 m and from 2 to 6 A method for removing dust from a boiler, wherein pressure waves are discharged into a second radiation chamber and a convection heat transfer chamber.   The boiler according to any one of claims 11 to 18, wherein a pressure wave is also emitted into a separate economizer that is provided downstream of the boiler and that heats water supplied to the boiler. Dust removal method.   The boiler dust removal method according to any one of claims 11 to 19, wherein a pressure wave is discharged from a pressure wave discharge nozzle disposed at a manhole position.

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