KR100638522B1 - Smoke and dust cleaning device of boiler - Google Patents

Abstract

A smoke and dust cleaning device of a boiler is provided to reduce the heat loss and fuel consumption by maintaining good condition of a heat transfer area by injecting water at high pressure. A smoke and dust cleaning device of a boiler includes a burner installed at the front side of a combustion chamber; a boiler body where a hole(22) is formed at the upper part of a heat transfer area(HA) and a flange(24) is projected from the hole; a water supply pipe lifting device(30) combining a casing(31) at the upper surface of the flange to mutually engage a worm(32) installed with a motor and a worm gear(34) at the casing; a water spraying unit(40) screw-combined to lift up and down a water supply pipe(41) in the axial direction of the worm gear, installed with a control valve(45) at a water supply conduit(44) connected at the upper end of the water supply pipe, and connected with a nozzle(48) at the lower end; a temperature sensor installed at the flue; a water supply pipe position detecting switch(60) installed at the upper side of the water supply pipe; and a controller controlling the burner, the worm motor, and the control valve by the output signals of the temperature sensor and the water supply pipe position detecting switch.

Description

Sold out cleaning device of boiler {SMOKE AND DUST CLEANING DEVICE OF BOILER}

1 is a view illustrating an installation state of a first embodiment of the present invention;

2 is a longitudinal sectional view of the first embodiment of the present invention;

3A to 3C are bottom plan views of the nozzle of the first embodiment of the present invention.

4 is a control block diagram of a first embodiment of the present invention;

5 is a functional state diagram of a first embodiment of the present invention

6 is a longitudinal sectional view of a second embodiment of the present invention;

7 is a control block diagram of a second embodiment of the present invention;

8 is an operational state diagram of a second embodiment of the present invention;

                 <Explanation of Signs of Major Parts of Drawings>

21 burner 24 flange 30 water supply pipe lifting mechanism

32,34: Worm and worm gear 32 ': Worm motor 40,140: Watering means

41,160: water supply pipe 44: water supply pipe 45: control valve

48,180: nozzle 50: temperature sensor 60: water supply position detection switch

70: controller 170: water supply rotary motor

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for cleaning dust out of a boiler, and more particularly, to an apparatus for automatically removing the dust attached to a heat transfer surface of a medium and small capacity boiler by automatically spraying high pressure water.

As is well known, fossil fuels, especially liquid fuels, used as fuel in boilers, are burned with sulfur and ash contained in the fuel, and combustion products such as sulphate, vanadium, and sulfur are soot and dust (hereinafter, sold out). Attached to the heat transfer surface in the state of "," as described above, if sold out (attachment) to the heat transfer surface as described above promotes the corrosion of the heat transfer surface and at the same time prevents heat transfer, the thermal efficiency is lowered (cleaning) shall.

In order to remove the sold-out of the heat transfer surface, a chute blower is installed in a large-capacity boiler to spray the steam or compressed air generated from the boiler while sliding the heat transfer surface to clean the dust. A water spray hole is formed in the upper portion of the heat transfer surface, and high pressure water is manually sprayed on the heat transfer surface through the hole to clean up the dust accumulated on the heat transfer surface.

However, the large-capacity boiler has a huge investment cost, easy to obtain steam or compressed air, and there is little economic burden to install additional chute blower, so that the cleaning of the heat transfer surface can be easily and quickly performed automatically. For small and medium-sized boilers, such as indirect heating boilers for bathrooms, hot water boilers cannot obtain steam. In order to obtain compressed air, a separate compressor must be installed as well as a separate blow blower on the heating surface. The need for a redesign and the enormous cost of it make it impractical.

On the other hand, cleaning the dust by manually spraying high pressure water on the heating surface of the medium / small capacity boiler does not increase the cost by laying only the water injection hole on the heating surface, but the high pressure water is manually applied to the heating surface for a certain time. The cleaning operation is inconvenient because it has to be sprayed, and the worker is avoiding the cleaning work by being exposed to the sold out.As mentioned above, if the cleaning of the heat transfer surface is avoided, the fuel consumption rate is increased due to the decrease in the thermal efficiency of the boiler. Problems such as increase occur.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a boiler dust cleaning device, which can be easily installed in a medium and small capacity boiler in a simple configuration so as to automatically clean the heat transfer surface.

In order to achieve the above object, the present invention provides a burner body in which a burner is installed in front of the combustion chamber, and a hole is formed in the upper portion of the heat transfer surface to protrude a flange in the hole; A water supply pipe elevating mechanism coupled to the upper surface of the flange to support the casing with a motor-mounted worm and a worm gear; A sprinkling means for screwing so as to lift and lower the water supply pipe in the axial direction of the worm gear, and installing a control valve in the water supply conduit connected to the upper end of the water supply pipe; A temperature sensor installed in the year and a water supply pipe position detection switch provided on an upper side of the water supply pipe; The controller is configured to control the burner, the worm motor and the control valve by the output signal of the temperature sensor and the feed pipe position detection switch.

In addition, the present invention provides a burner body in which a burner is installed in front of the combustion chamber, and a hole is formed in the upper portion of the heat transfer surface to protrude a flange in the hole; A water supply pipe elevating mechanism coupled to an upper surface of the flange to support the casing with a motor-mounted worm and a worm gear; Screw-coupled to raise and lower the water supply pipe support tube in the axial direction of the worm gear, the flange is installed on the upper end of the water supply pipe support tube to couple the support member and the water supply storage chamber formed on the support member to install a control valve The water supply pipe rotation motor is connected to the water supply pipe, and supports the upper part of the water supply pipe through the water supply storage chamber above and below the support member, and supports the water supply pipe to protrude to the lower end of the water supply pipe support tube and communicates with the water supply storage chamber. Watering means provided with a nozzle at the bottom; A water supply pipe position detection switch installed on an upper side of the temperature sensor and the water supply pipe support pipe installed in the year; The controller is configured to control the burner, the worm motor, the control valve and the water supply pipe rotation motor by the output signal of the temperature sensor and the water supply pipe position detection switch.

1 is an exemplary view illustrating an installation state of a first embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view of a first embodiment of the present invention, and FIGS. 3A to 3C are bottom plan views of the nozzle of the first embodiment of the present invention. 4 is a control block diagram of a first embodiment of the present invention, wherein 10 is a boiler, and the boiler 10 has a combustion chamber (furnace) 12 at the front lower portion of the boiler body 11, and a heating water tank 13 around it. ) And a heat exchanger chamber (14) communicating with the heating water tank (13) in the upper portion of the combustion chamber (12) to incorporate the heat exchanger (15), and to the rear of the combustion chamber (12) and the heat exchanger chamber (14). The radiant heating water tank 16 is formed in the upper part of the exhaust passage 17a and the exhaust outlet 17b in the lower part of the combustion chamber 12 at right angles to the combustion chamber 12. The radiant heating water tank 16 is installed in communication with the heating water tank 13. 18 and a flue gas chamber 19, and a plurality of horizontal water pipes 20a and 20b in the flame chamber 18 and the flue gas chamber 19 parallel to the radiant heating water tank 16. ) Is installed in communication with the heating water tank 13 so that the combustion chamber 12, the radiant heating water tank 16, the flame chamber 18, the flue gas chamber 19 and the horizontal water pipe 20a, 20b and the like are transferred to the heating surface. As formed by (HA), the boiler exemplifies the furnace water pipe type indirect heating hot water boiler, but is not limited thereto.

A burner 21 is installed in front of the combustion chamber 12, and a hole 22 is formed in an upper portion of the heat transfer surface HA of the boiler body 11, and a connection pipe 23 is formed outside the hole 22. ) To form a flange 24 at the free end of the connecting pipe (23).

30 is a water supply pipe elevating mechanism, and the water supply pipe elevating mechanism 30 supports the casing 31 on the upper surface of the flange 24 to support the worm 32 of the motor 32 'on one side of the casing 31. The bosses (35a) and (35b) of the worm gear (34), which are supported by (33) and have formed a trapezoidal female screw (36) at the other side of the casing (31), are bearings (37a) (37b). 34) is to support the worm 32 to be able to bite.

40 is a sprinkling means, wherein the sprinkling means 40 forms a trapezoidal male screw 42 on the outer surface of the water supply pipe 41 and screws to the trapezoidal female screw 36 formed in the worm gear 34 in the axial direction thereof. The guide protrusion 43 'into which the guide groove 43 is inserted into the cover 38 covering the upper portion of the casing 31 while forming a guide groove 43 perpendicular to the outer surface of the water supply pipe 41. Install the water supply pipe (44) connected to the upper end of the water supply pipe 41, the control valve 45, the strainer 46 and the water supply pump 47 in turn and the nozzle 48 at the bottom of the water supply pipe 41 The worm gear 34 rotates as the worm 32 is driven by driving the motor 32 'and the water supply pipe 41 ascends as the worm gear 34 rotates. Located in the connection pipe 23 or lowered to project to the heat transfer surface (HA).

In addition, the water supply pump 47 supplies water directly to the water supply conduit 44 while omitting the water supply having a constant pressure (for example, 5 kg / cm 2) as a water supply.

The nozzle 48 can be circular (481a), straight (481b), + type (481c) and the like as shown in Figs. 3A to 3C.

50 is a temperature sensor, the temperature sensor 50 is installed in the flue 25 to detect the temperature of the exhaust gas to output the output signal to the controller 70 to be described later.

In addition, 60 is a water supply pipe position detection switch, and the water supply pipe position detection switch 60 is provided with a strut 61 on an upper side surface of the water supply pipe 41 of the cover 38 to limit the limit switches 62a and 62b at a predetermined interval. And an upper projection 63 provided at an upper end of the water supply pipe 41 so that the upper projection 63 is connected when the upper projection 63 is at the side position of the limit switches 62a and 62b, and the controller 70 to describe the signal later. To be entered.

The water pipe position detection switch 60 is shown, but not limited to the limit switch 62a (62b) and the upper projection 63 can be used as well known proximity switch, photoelectric switch, reed switch and the like.

70 is a controller, and the controller 70 controls the burner 21, the worm motor 32 ′ and the control valve 45 by receiving signals from the temperature sensor 50 and the water supply position detection switch 60. The controller 70 is preferably a program control of the sequence control that is widely used, but not limited to the above, may be used as a feedback control, of course, it is also possible to use a relay control panel prior to the sequence control.

In addition, the present invention is to install a control projection as the lifting safety control means up and down the water supply pipe 41, the lowering control projection is also combined with the upper projection 63, the upper projection 63 is in contact with the cover 38 When the lowering stops, the rising control projection is installed below the water supply pipe 41, the lower projection 49 is installed so that when the nozzle 48 is positioned (stored) in the connection pipe 23 to stop the rise of the water supply pipe 41. This increases safety.

Reference numeral 26 is a refractory brick, 27 is a dropout exhaust hole, 28 is a refractory brick support member, 29 is a waste collection chamber, 29 'is a discharge conduit, 38' is a casing cover, and 39a is a snap ring. And 39b is a metallic thread.

According to the first embodiment of the present invention as described above, since the nozzle 48 is in the position of FIG. 2 during the normal operation of the boiler, ideal combustion can be performed since there is no obstacle in the combustion of fuel and the flow of flame and combustion gas. As the fuel is combusted and the flame and the combustion gas are heat transferred to the heat medium through the heat transfer surface HA, if the dust contained in the combustion gas is deposited on the heat transfer surface HA, the heat transfer becomes poor and according to the heat transfer failure The temperature of the exhaust gas discharged to the flue 25 is to be increased.

As described above, when the temperature of the exhaust gas discharged to the flue 25 becomes higher than the set temperature (for example, 200 to 220 ° C.), the temperature sensor 50 detects this and sells the signal to the controller. The controller 70 which is input to the 70 and the signal of the temperature sensor 50 is input to the motor of the burner 21 stops its driving and stops the combustion of the fuel and at the same time the worm motor 32 '. The water supply pipe 41 is lowered vertically by rotating the worm 32 by rotating the worm gear 34, and the worm gear 34 is an upper protrusion 63 installed at the top of the water supply pipe 41. The water supply pipe 41 is lowered while rotating until it is connected to the limit switch 62b. The water supply pipe 41 is lowered as described above, and the nozzle 48 installed at the lower end is placed on the heat transfer surface HA as shown in FIG. after extrusion, and opening the control valve 45 in rapid water pipe (44) water supply pump 47, a driving also when using the ground water; A feeding water through the nozzle 48, and sprayed onto the transfer surface (HA) for the high-pressure water, the water injection period is to be continued as long as the set time of the timer built into the controller 70 (for 5 minutes).

When water is injected into the heat transfer surface HA at a high pressure as described above, the sold out deposited on the heat transfer surface HA is quickly removed due to the heating state, and the sold out including the water dropped from the heat transfer surface HA is dropped out. 27 through the discharge conduit (29 ') while gathered in the collection room 29 via the exhaust is to be discharged to a certain place.

As described above, the nozzle 48 of the sprinkling means 40 is stored in the connecting pipe 23 when the boiler is in normal operation, and the water supply pipe 41 is lowered when the heating surface HA is cleaned to transfer the nozzle 48. By protruding onto the hot surface HA and spraying high pressure water onto the heat transfer surface, cleaning of the heat transfer surface can be performed quickly, easily and satisfactorily.

When the cleaning signal is set as the timer by the output signal of the controller 70 and the output signal is stopped, the control valve 45 is closed and the worm motor 32 'is reversed upward. By rotating until 63 connects the limit switch 62a, the water supply pipe 41 and the nozzle 48 are reduced to the state as shown in FIG. 2, and the dust collected on the bottom surface of the combustion chamber 12 and the heating water tank 13 The burner 21 is restarted by the output signal of the controller 70 after a predetermined set time (eg, 5 minutes) to be discharged.

In the present invention, the nozzle 48 is stored in the connection pipe 23 not related to the heat transfer surface HA, so that the nozzle 48 can be left attached to the boiler, and the exhaust gas is deposited on the heat transfer surface HA and the temperature of the exhaust gas is accumulated. When it is high, it is possible to automatically clean the heating surface (HA) to prevent degradation of the thermal efficiency of the boiler and to reduce the fuel consumption rate.

FIG. 6 is a longitudinal sectional view of the second embodiment of the present invention, FIG. 7 is a control block diagram of the second embodiment of the present invention, and FIG. 8 is an operational state diagram of the second embodiment of the present invention, which is the same as the first embodiment. The components are designated by the same reference numerals, and the detailed description is omitted. In the first embodiment, the water is sprayed onto the heat transfer surface HA without the water supply pipe 41 being elevated and the nozzle 48 being not rotated. An example is spraying water onto the heat transfer surface HA while the water supply pipe 247 moves up and down and rotates.

140 is a watering means, the watering means 140 is formed in the trapezoidal male screw 36 formed in the worm gear 34 in the axial direction by forming a trapezoidal male screw 142 on the outer surface of the water supply pipe support tube 141. The guide protrusion is coupled to the guide groove 143 is inserted into the cover 38 to cover the upper portion of the casing 31 at the same time to form a vertical guide groove 143 on the outer surface of the water supply pipe support tube 141. 144 is installed, and the flange 145 is installed on the top of the water supply pipe support tube 141.

In addition, the support member 150 is coupled to the flange 145 installed on the upper end of the water supply pipe support tube 141, and a water supply storage chamber 151 is formed in the support member 150 to connect the water supply conduit 152. At the same time, the control valve 153, the strainer 154 and the water supply pump 155 are sequentially installed in the water supply conduit 152, and the water supply pump 155 is a water supply having a constant pressure (for example, 5 kg / cm 2) as water supply. Is omitted in the area where it is possible to supply water directly to the water supply conduit 152.

In addition, the water supply pipe 160 is installed above and below the support member 150, and the upper portion thereof is supported by the bushes 161a and 161b through the water supply storage chamber 151 and at the same time, a through hole 162 is installed to supply the water supply storage chamber. In communication with the 151 and inserting the water supply pipe 160 to protrude to the lower end of the water supply pipe support tube 141 and supported by the bush (161c), the water supply pipe rotation motor 170 on the upper portion of the water supply pipe 160, At the bottom, the nozzle 180 is installed.

The water supply pipe rotary motor 170 is added to the output element of the controller 70 in the first embodiment, and the descending control protrusion is provided as the safety control means of the water supply pipe support pipe installed above and below the water supply pipe support pipe 141. Combined with (145), the rising control projection is to install the lower projection 156 below the water supply pipe support pipe (141).

Reference numerals 163a and 163b are rubber threads.

The nozzle 180 of the watering means 140 of the second embodiment of the present invention as described above is located at the same position as that of FIG. 6 during the normal operation of the boiler. The motor of the burner 21 is stopped and the worm motor 32 'is driven by the output signal of the power supply, and the water supply pipe support tube 141 is lowered so that the nozzle 180 protrudes on the heat transfer surface HA and the control valve ( As the water supply pipe 160 rotates while the water supply pipe rotation motor 170 is driven at the same time as the water supply pipe 160 rotates to spray the high pressure water onto the heat transfer surface HA from the nozzle 180 to eliminate the sold out and the first cleaning is completed. Burner 21 is restarted as in the embodiment.

Rotating the water supply pipe 160 as described above will further increase the cleaning efficiency of the sold out than the first embodiment.

As described above, the present invention is a state in which the cleaning device of a simple configuration is installed on the top of the heating surface of the boiler, and the nozzle of the watering means is placed in the connection pipe which is not related to the heating surface, and automatically sold out on the heating surface. The spraying means is lowered to protrude the nozzle onto the heating surface, spraying water at high pressure on the heating surface with the nozzle stopped or rotating on the heating surface to automatically clean the sold out, so that the cleaning of the sold out can be done quickly and easily. In addition, if the cleaning of the heat transfer surface is simple and quick, it is possible to reduce heat loss and reduce fuel consumption by maintaining the heat transfer surface at all times to ensure good heat transfer.

Claims (6)

 A boiler body in which a burner is installed in front of the combustion chamber, and a hole is formed in an upper portion of the heat transfer surface to protrude a flange in the hole; A water supply pipe elevating mechanism coupled to the upper surface of the flange to support the casing with a motor-mounted worm and a worm gear; A sprinkling means for screwing so as to lift and lower the water supply pipe in the axial direction of the worm gear, and installing a control valve in the water supply conduit connected to the upper end of the water supply pipe; A temperature sensor installed in the year and a water supply pipe position detection switch provided on an upper side of the water supply pipe; And a controller for controlling the burner, the worm motor, and the control valve according to an output signal of the temperature sensor and the feed pipe position detection switch. A boiler body in which a burner is installed in front of the combustion chamber, and a hole is formed in an upper portion of the heat transfer surface to protrude a flange in the hole; A water supply pipe elevating mechanism coupled to an upper surface of the flange to support the casing with a motor-mounted worm and a worm gear; Screw-coupled to raise and lower the water supply pipe support tube in the axial direction of the worm gear, the flange is installed on the upper end of the water supply pipe support tube to couple the support member and the water supply storage chamber formed on the support member to install a control valve A water pipe rotation motor is connected to the water supply pipe, and supports the upper portion of the water supply pipe through the water supply storage chamber above and below the support member, and supports the water supply pipe to protrude to the lower end of the water supply pipe support tube and communicates with the water supply storage chamber. Watering means having a nozzle installed at the bottom; A water supply pipe position detection switch installed on an upper side of the temperature sensor and the water supply pipe support pipe installed in the year; And a controller for controlling the burner, the worm motor, the control valve and the water supply pipe rotating motor by the output signal of the temperature sensor and the water supply pipe position detection switch. The apparatus of claim 1 or 2, wherein the nozzle is selected from a straight type, a positive type, and a circular type. The apparatus of claim 1, wherein an upper projection is provided at an upper end of the water supply pipe, the upper projection is used as a lowering control projection, and a rising control projection is provided below the water supply pipe. The apparatus of claim 2, wherein the flange formed at the upper end of the water supply pipe support pipe is used as a lowering control projection, and the rising control projection is provided at the lower end of the water supply pipe support tube. The apparatus of claim 2, wherein a through hole is formed in the upper portion of the water supply pipe to communicate with the water supply storage chamber.

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