Cyclone dust removal device of garbage and sludge collaborative incineration boiler

Abstract

The utility model discloses a cyclone dust removal device of a garbage sludge collaborative incineration boiler, which comprises a cyclone dust remover, an ash storage tank, an electric gate valve, a scraper conveyor and a sludge feed port of the garbage incineration boiler, a lower end outlet of the cyclone dust remover is connected with an inlet of the ash storage tank, an outlet of the ash storage tank is connected with an inlet of the electric gate valve, and an outlet of the electric gate valve is connected with an outlet of the scraper conveyor. An outlet of the electric gate valve is connected with an inlet of the scraper conveyor, an outlet of the scraper conveyor is connected with a sludge feeding port of the waste incineration boiler, a plurality of nozzles are arranged on the wall face of the cyclone dust collector, the nozzles are connected with a compressed air pipeline, and the nozzles purge the inner wall of the cyclone dust collector. By additionally arranging the compressed air pipeline and the nozzle on the inverted conical section of the lower part of the cyclone dust collector, compressed air can be introduced to purge the inner wall of the inverted conical section of the lower part of the cyclone dust collector before the sludge drying system is started, during the operation and after the sludge drying system is stopped, so that the accumulated dust on the inner wall of the cyclone dust collector is reduced, and the dust collection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers, and in particular relates to a cyclone dust removal device for a garbage sludge coordinated incineration boiler. Background Art

[0002] The harmless disposal of municipal sludge in my country is mainly carried out through the coordinated incineration with waste power plants. Since there are requirements for the moisture content of the sludge entering the boiler of the waste coordinated incineration boiler, it needs to be dried and pre-treated. When the sludge is dried, the exhaust gas discharged by the dryer contains a large amount of dust and water vapor. Under the action of the exhaust fan, the exhaust gas passes through the cyclone dust collector and the condenser in turn to achieve the purpose of dust removal and condensation. When the drying system is in long-term continuous and stable operation, the exhaust gas treatment system has high dust removal and condensation efficiency and a very low failure rate. At present, some cities with low urbanization levels have established several sludge drying workshops in response to the call for harmless disposal of sludge in my country. Due to the unstable sludge supply, it is impossible to ensure that the sludge drying system can operate continuously for 24 hours, and then the system is forced to switch to intermittent operation, which increases the number of system start-up and shutdown times. During the shutdown and cooling process of the equipment, the exhaust gas condenses and causes a large amount of dust to adhere to the inner wall of the equipment. At present, the condenser has been generally equipped with a heat exchange tube inner wall flushing device, and the cyclone dust removal device also needs to be improved to adapt to the intermittent operation of the system. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a cyclone dust removal device for a garbage sludge co-incineration boiler. By adding a compressed air pipeline and a nozzle to the lower inverted cone section of the cyclone dust collector, compressed air can be introduced to blow the inner wall of the lower inverted cone section of the cyclone dust collector before starting, during operation, and after stopping the sludge drying system, thereby reducing dust accumulation on the inner wall of the cyclone dust collector and improving the dust removal efficiency.

[0004] The technical solution provided by the utility model is as follows:

[0005] A cyclone dust removal device for a garbage-sludge coordinated incineration boiler comprises a cyclone dust collector, an ash storage tank, an electric gate valve, a scraper conveyor and a sludge feed port of the garbage incineration boiler, wherein the lower end outlet of the cyclone dust collector is connected to the inlet of the ash storage tank, the outlet of the ash storage tank is connected to the inlet of the electric gate valve, the outlet of the electric gate valve is connected to the inlet of the scraper conveyor, and the outlet of the scraper conveyor is connected to the sludge feed port of the garbage incineration boiler;

[0006] The wall of the cyclone dust collector is provided with a plurality of nozzles, which are connected to the compressed air pipeline and blow the inner wall of the cyclone dust collector.

[0007] In some embodiments, the cyclone dust collector comprises an upper straight section and a lower inverted conical section, and a smoke inlet and a smoke outlet are provided at the top of the straight section.

[0008] In some embodiments, four nozzles are provided, and the four nozzles are arranged in the middle of the inverted cone section and are evenly distributed along the circumferential direction of the inverted cone section.

[0009] In some embodiments, the nozzle includes an air inlet pipe and a nozzle, the nozzle is arranged on the inner wall of the inverted cone section, and the air inlet pipe passes through the wall surface of the inverted cone section and is connected to the nozzle.

[0010] In some embodiments, the nozzle has two layers of small holes, the upper layer has eight small holes, and they are evenly arranged along the circumference of the nozzle, and the lower layer has eight small holes, and they are evenly arranged along the circumference of the nozzle.

[0011] In some embodiments, the angle between the small holes in the upper layer and the central axis of the nozzle is α, 70°<α<90°, and the angle between the small holes in the lower layer and the central axis of the nozzle is β, 60°<β<80°.

[0012] In some embodiments, a ball valve is provided on the compressed air pipeline.

[0013] In summary, the beneficial effects of the utility model are as follows:

[0014] (1) The utility model adds a compressed air pipeline and a nozzle to the lower inverted cone section of the cyclone dust collector, and can introduce compressed air to blow the inner wall of the lower inverted cone section of the cyclone dust collector before the sludge drying system is started, during operation, and after shutdown, thereby reducing dust accumulation on the inner wall of the cyclone dust collector, improving dust removal efficiency, reducing the failure rate of the exhaust gas treatment system, being able to adapt to intermittent operating conditions, and improving system adaptability.

[0015] (2) The utility model arranges the nozzles and designs the specific structure of the nozzles so that compressed air can be sprayed out from the small holes to purge the area near the nozzles. The small holes in the upper layer have a larger angle with the central axis and are located higher to cover a larger range. The small holes in the lower layer have a smaller angle with the central axis and are located lower to purge areas that cannot be swept by the small holes in the upper layer, thereby ensuring the comprehensiveness of the purging area. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a distribution diagram of the nozzles of the utility model;

[0018] Figure 3 This is the front view of the nozzle structure of the utility model;

[0019] Figure 4 This is a top view of the nozzle structure of the utility model.

[0020] The reference numerals are as follows:

[0021] 1. Cyclone dust collector; 2. Ash storage tank; 3. Electric gate valve; 4. Scraper conveyor; 5. Compressed air pipeline; 6. Ball valve; 7. Nozzle; 8. Sludge feed port of garbage incineration boiler; 11. Straight cylinder section; 12. Inverted cone section; 13. Flue gas inlet; 14. Flue gas outlet; 71. Air inlet pipe; 72. Nozzle; 73. Small hole. DETAILED DESCRIPTION

[0022] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0023] Example 1

[0024] like Figure 1-4 As shown, the present embodiment provides a cyclone dust removal device for a garbage-sludge co-incineration boiler, which mainly includes a cyclone dust collector 1, an ash storage tank 2, an electric gate valve 3, a scraper conveyor 4 and a sludge feeding port 8 of the garbage incineration boiler, wherein the cyclone dust collector 1 is generally installed at the discharge of sludge drying tail gas, and is used to remove dust from the discharged tail gas, the ash storage tank 2 is arranged at the outlet of the cyclone dust collector 1, that is, the bottom of the cyclone dust collector 1, and is used to store dust, the scraper conveyor 4 is arranged at the bottom of the ash storage tank 2, and is used to transport the dust in the ash storage tank 2 to a specific dust concentration area, and an electric gate valve 3 is also arranged between the ash storage tank 2 and the scraper conveyor 4, which is used to control the flow of dust in the ash storage tank 2. Generally, when the dust in the ash storage tank 2 is about to be full, the electric gate valve 3 is opened, and the dust in the ash storage tank 2 enters the scraper conveyor 4, and the scraper conveyor 4 transports the dust and the dried sludge to the sludge feeding port 8 of the garbage incineration boiler, and then enters the furnace for incineration with the garbage.

[0025] The cyclone dust collector 1 includes an upper straight section 11 and a lower inverted cone section 12. The top of the straight section 11 is provided with a flue gas inlet 13 and a flue gas outlet 14. During the dust removal process of the cyclone dust collector 1, due to the shutdown and cooling of the equipment, the tail gas condenses, causing a large amount of dust to adhere to the inner wall of the cyclone dust collector 1. Therefore, a plurality of nozzles 7 are provided on the wall of the cyclone dust collector 1. The nozzles 7 are connected to the compressed air pipeline 5. The compressed air pipeline 5 transports high-pressure gas, which is blown out from the nozzles 7 to purge the inner wall of the cyclone dust collector 1 and blow the attached dust into the ash storage tank 2, thereby reducing the dust accumulation on the inner wall of the cyclone dust collector, improving the dust removal efficiency, reducing the failure rate of the tail gas treatment system, being able to adapt to intermittent operating conditions, and improving the system adaptability. In order to control the purge of the nozzle 7, a ball valve 6 is also provided on the compressed air pipeline 5. After the equipment is shut down, the purge can be carried out by simply opening the ball valve 6.

[0026] Example 2

[0027] This embodiment is formed on the basis of the embodiment 1. By arranging the nozzle 7 and designing the specific structure of the nozzle 7, the compressed air can be sprayed out from the small hole to purge the area near the nozzle 7 and cover most of the area of ​​the inner wall of the cyclone dust collector 1. Specifically:

[0028] Please refer to Figure 2 There are four nozzles 7, which are arranged in the middle of the inverted cone section 12 and evenly distributed along the circumferential direction of the inverted cone section 12. Each nozzle 7 is connected to the compressed air pipeline 5 to ensure that the blowing force of each nozzle 7 is the same.

[0029] The nozzle 7 includes an air inlet pipe 71 and a nozzle 72. The nozzle 72 is arranged on the inner wall of the inverted conical section 12. The nozzle 72 can be installed on the inner wall of the inverted conical section 12 by welding, screwing or riveting. The center of the nozzle is perpendicular to the inner wall of the inverted conical section 12, so that each nozzle 7 can blow the same area. The air inlet pipe 71 passes through the wall of the inverted conical section 12 and is connected to the nozzle 72. The air inlet pipe 71 is welded to the outer wall of the inverted conical section 12 to ensure that the inverted conical section 12 will not leak.

[0030] The nozzle 72 has two layers of small holes 73, the upper layer has eight small holes 73, and they are evenly arranged along the circumference of the nozzle 72; the lower layer has eight small holes 73, and they are evenly arranged along the circumference of the nozzle 72; the upper layer of small holes 73 is used to blow the inner wall away from the nozzle 7, and the lower layer of small holes 73 is used to blow the inner wall close to the nozzle 7.

[0031] Furthermore, in order to ensure that the blowing can more comprehensively cover the inner wall of the cyclone dust collector 1, the angle between the small holes 73 in the upper layer and the central axis of the nozzle 72 is α, 70°<α<90°, and the angle between the small holes 73 in the lower layer and the central axis of the nozzle 72 is β, 60°<β<80°. Specifically, the angle between the small holes 73 in the upper layer and the central axis is larger, and the position is high to cover a larger range, and the angle between the small holes 73 in the lower layer and the central axis is smaller, and the position is low, so that the areas that cannot be swept by the small holes 73 in the upper layer can be swept, thereby ensuring the comprehensiveness of the blowing area.

[0032] In this embodiment, the ball valve 6 can be opened in various working conditions, such as before the sludge drying system is started, during operation, and after shutdown, to introduce compressed air into the four nozzles 7 through the compressed air pipeline 5. The compressed air pressure range is 0.6MPa-1.0MPa. The small hole 73 on the nozzle 72 of the nozzle 7 sprays high-speed compressed air outward to sweep the wall of the lower inverted cone section of the cyclone dust collector 1, thereby reducing dust accumulation on the inner wall of the cyclone dust collector, improving the dust removal efficiency, reducing the failure rate of the exhaust gas treatment system, being able to adapt to intermittent operation conditions, and improving the adaptability of the system.

[0033] It should be noted that the implementation methods not shown or described in the drawings or the text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each element and method are not limited to the various specific structures, shapes or methods mentioned in the embodiments.

[0034] It should also be noted that this document may provide demonstrations of parameters containing specific values, but these parameters do not need to be exactly equal to the corresponding values, but can be approximated to the corresponding values ​​within an acceptable error tolerance or design constraint. Directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", etc., are only referenced to the directions of the drawings and are not intended to limit the scope of protection of this application.

[0035] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A cyclone dust removal device for a garbage sludge co-incineration boiler, characterized in that: The invention comprises a cyclone dust collector (1), an ash storage tank (2), an electric gate valve (3), a scraper conveyor (4), and a sludge feed port (8) of a waste incineration boiler, wherein the lower end outlet of the cyclone dust collector (1) is connected to the inlet of the ash storage tank (2), the outlet of the ash storage tank (2) is connected to the inlet of the electric gate valve (3), the outlet of the electric gate valve (3) is connected to the inlet of the scraper conveyor (4), and the outlet of the scraper conveyor (4) is connected to the sludge feed port (8) of the waste incineration boiler; The wall surface of the cyclone dust collector (1) is provided with a plurality of nozzles (7), the nozzles (7) are connected to a compressed air pipeline (5), and the nozzles (7) are used to blow the inner wall of the cyclone dust collector (1).

2. The cyclone dust removal device for the garbage-sludge co-incineration boiler according to claim 1 is characterized in that: The cyclone dust collector (1) comprises an upper straight tube section (11) and a lower inverted cone section (12); a smoke inlet (13) and a smoke outlet (14) are provided at the top of the straight tube section (11).

3. The cyclone dust removal device for the garbage-sludge co-incineration boiler according to claim 2 is characterized in that: Four nozzles (7) are provided, and the four nozzles (7) are arranged in the middle of the inverted cone section (12) and are evenly distributed along the circumferential direction of the inverted cone section (12).

4. The cyclone dust removal device for the garbage-sludge co-incineration boiler according to claim 3 is characterized in that: The nozzle (7) comprises an air inlet pipe (71) and a nozzle (72); the nozzle (72) is arranged on the inner wall of the inverted conical section (12); the air inlet pipe (71) passes through the wall surface of the inverted conical section (12) and is connected to the nozzle (72).

5. The cyclone dust removal device for the garbage-sludge co-incineration boiler according to claim 4 is characterized in that: The nozzle (72) is provided with two layers of small holes (73), the upper layer of small holes (73) being provided with eight and being evenly arranged along the circumferential direction of the nozzle (72); the lower layer of small holes (73) being provided with eight and being evenly arranged along the circumferential direction of the nozzle (72).

6. The cyclone dust removal device for the garbage-sludge co-incineration boiler according to claim 5 is characterized in that: The angle between the small holes (73) of the upper layer and the central axis of the nozzle (72) is α, 70°<α<90°, and the angle between the small holes (73) of the lower layer and the central axis of the nozzle (72) is β, 60°<β<80°.

7. The cyclone dust removal device for the garbage-sludge coordinated incineration boiler according to claim 1 is characterized in that: The compressed air pipeline (5) is provided with a ball valve (6).

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