Flue gas dust removal device for waste incineration waste heat boiler

Abstract

The utility model discloses a waste incineration waste heat boiler flue gas dust removal device which comprises a dust removal pipeline, one end of the dust removal pipeline is communicated with a smoke exhaust pipeline of a waste heat boiler, a dust collecting pipe row is obliquely arranged in the dust removal pipeline, a dust collecting hopper is arranged at the bottom of the dust collecting pipe row, and a cinder valve is arranged at the outlet end of the dust collecting hopper. The dust discharging valve is connected with a dust discharging pipe and is used for discharging dust collected in the dust collecting hopper; a shock wave soot blower is arranged at the top of the dust capturing pipe row and is used for blowing dust on the dust capturing pipe row into the dust collecting hopper. The dust collecting pipe row is obliquely arranged in the dust removal pipeline, so that dust is collected, the content of fly ash in flue gas is reduced, the rear-end flue gas treatment cost is reduced, and the service life of rear-end flue gas equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to garbage incineration equipment technical field, concretely relates to a garbage incineration waste heat boiler flue gas dust removal device. BACKGROUND

[0002] In recent years, with the continuous acceleration of urbanization process in China, the living standards of citizens are continuously improved, and the garbage of city is produced in large quantities, and improper treatment of garbage may cause serious air pollution, water pollution and soil pollution and will occupy a large amount of land, affecting people's life and economic development. At present, the municipal solid waste in China mainly adopts sanitary landfill, incineration and composting and other treatment methods, among which the garbage incineration method can better achieve the treatment reduction, resource and harmlessness of garbage treatment, and has become the mainstream technology of garbage treatment in China. At present, the construction scale of garbage incineration plant is larger and larger, the capacity of garbage incineration waste heat boiler is gradually increased, and the treatment capacity of each garbage incineration waste heat boiler is gradually increased.

[0003] Chinese patent document CN222026954U discloses a high-parameter garbage incineration waste heat boiler, which comprises a radiation flue, the radiation flue is communicated with a horizontal flue, the horizontal flue is communicated with a coal economizer flue, a plurality of superheaters are arranged in the horizontal flue, and a bypass flue communicates the middle part of the radiation flue with the middle part of the horizontal flue. The beneficial effects of the scheme are: the superheater inlet smoke temperature is low, the superheater high-temperature corrosion risk is small; the flue gas is divided by the flue gas bypass, the middle-overhead front arrangement is matched, the superheater does not need additional protection or improved material, and the overall cost is low; the flue gas temperature before the superheater and the steam temperature in the pipe are adjusted by the flue gas bypass shunting and water injection temperature reduction, which can effectively reduce the high-temperature corrosion of the superheater.

[0004] The existing garbage incineration waste heat boiler lacks dust removal equipment, and due to the high proportion of garbage fly ash, it is easy to cause large dust in the furnace, a large amount of particulate matter enters the flue gas purification system, so that the load of the flue gas purification system is increased, and the normal operation of the equipment is affected. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a garbage incineration waste heat boiler flue gas dust removal device, which solves the above problems in the prior art.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a garbage incineration waste heat boiler flue gas dust removal device, including dust removal pipeline, one end of dust removal pipeline is connected with the exhaust pipe of waste heat boiler, and the dust collection pipe row is obliquely arranged in the dust removal pipeline, the bottom of dust collection pipe row is equipped with dust collecting hopper, and the export end of dust collecting hopper is equipped with unloading valve, and the unloading valve is connected with ash pipe, and the unloading valve is used to unload the dust collected in dust collecting hopper.

[0007] As an optional implementation of the above technical scheme, the dust collection pipe row includes a plurality of parallel arranged fiber filter tubes, and the plurality of fiber filter tubes are obliquely arranged in the dust removal pipeline.

[0008] As an optional implementation of the above technical scheme, the inclination angle of the fiber filter tube is 45 degrees.

[0009] As an optional implementation of the above technical scheme, the top of the fiber filter tube is inclined towards the direction of the exhaust pipe.

[0010] As an optional implementation of the above technical scheme, the bottom of the fiber filter tube extends into the interior of the dust collecting hopper and contacts the inner wall of the dust collecting hopper.

[0011] As an optional implementation of the above technical scheme, the economizer is arranged in the exhaust pipe, and the ash storage hopper is arranged below the economizer.

[0012] As an optional implementation of the above technical scheme, the ash conveying mechanism is arranged below the ash storage hopper, and the output end of the ash pipe extends to the ash conveying mechanism.

[0013] As an optional implementation of the above technical scheme, the flue gas purification system is connected to the end of the dust removal pipeline away from the exhaust pipe.

[0014] The utility model has the advantages that:

[0015] The utility model provides a kind of garbage incineration waste heat boiler flue gas dust removal device, dust collection pipe row is obliquely arranged in dust removal pipeline, and the bottom of dust collection pipe row is equipped with dust collecting hopper, and the top of dust collection pipe row is equipped with shock wave soot blower, and shock wave soot blower is used to blow the dust on dust collection pipe row into dust collecting hopper.The utility model is obliquely arranged dust collection pipe row in dust removal pipeline, to realize collection dust, reduce fly ash content in flue gas, reduce rear-end flue gas processing cost, improve the service life of rear-end flue gas equipment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1is a structural schematic view of the dust collecting pipe row in the garbage incineration waste heat boiler flue gas dust removal device in an embodiment of the utility model.

[0017] Figure 2 is a structural schematic view of the dust collecting pipe row in the garbage incineration waste heat boiler flue gas dust removal device in an embodiment of the utility model.

[0018] In the figure: 1 - dust removal pipeline;2 - flue gas pipeline;3 - dust collecting pipe row;4 - dust collecting hopper;5 - ash unloading valve;6 - ash discharging pipe;7 - shock wave soot blower;8 - fiber filter pipe;9 - coal economizer;10 - ash storage hopper;11 - ash conveying mechanism;12 - flue gas purification system. Specific embodiments

[0019] As Figure 1 and Figure 2 shown, the embodiment provides a kind of garbage incineration waste heat boiler flue gas dust removal device, including dust removal pipeline 1, the dust removal pipeline 1 one end with waste heat boiler's flue gas pipeline 2 intercommunication, dust removal pipeline 1 is connected with flue gas purification system 12 at the end away from flue gas pipeline 2, by flue gas purification system 12 to flue gas is purified and handled, makes flue gas discharge with standard.

[0020] Dust removal pipeline 1 is inclined and is equipped with dust collecting pipe row 3, dust collecting pipe row 3 is arranged at the one end of dust removal pipeline 1 close to flue gas pipeline 2, and dust collecting pipe row 3 is used to capture dust.The bottom of the dust collecting pipe row 3 is equipped with dust collecting hopper 4, the outlet end of the dust collecting hopper 4 is equipped with ash unloading valve 5, and ash unloading valve 5 is connected with ash discharging pipe 6, and ash unloading valve 5 is used to unload the dust collected in dust collecting hopper 4;The top of dust collecting pipe row 3 is equipped with shock wave soot blower 7, and shock wave soot blower 7 is used to blow the dust on dust collecting pipe row 3 into dust collecting hopper 4.

[0021] Flue gas of garbage incineration waste heat boiler enters dust removal pipeline 1 from flue gas pipeline 2, and the dust in flue gas is captured after being captured by dust collecting pipe row 3, and flue gas enters flue gas purification system 12 along dust removal pipeline 1.When dust collecting pipe row 3 captures certain dust, open shock wave soot blower 7, and shock wave soot blower 7 blows the dust on dust collecting pipe row 3 into dust collecting hopper 4;When the dust in dust collecting hopper 4 reaches a certain amount, open ash unloading valve 5, so that the dust in dust collecting hopper 4 is discharged through ash discharging pipe 6.

[0022] The utility model sets up dust collecting pipe row 3 in dust removal pipeline 1 to realize collecting dust, reduce fly ash content in flue gas, reduce the cost of back-end flue gas treatment, improve the service life of back-end flue gas equipment.

[0023] In one embodiment, the dust collection pipe row 3 comprises a plurality of parallel arranged fiber filter pipes 8, which are arranged obliquely in the dust removal pipe 1. Preferably, the oblique angle of the fiber filter pipe 8 is 45 degrees. The top of the fiber filter pipe 8 is inclined towards the direction of the flue gas duct 2, and the bottom of the fiber filter pipe 8 extends into the dust collection hopper 4 and is in contact with the inner wall of the dust collection hopper 4. After the fiber filter pipe 8 traps the dust, the shock wave soot blower 7 blows the dust into the dust collection hopper 4. Due to the obstruction of the fiber filter pipe 8, most of the dust is trapped, and a small amount of dust is carried by the airflow through the fiber filter pipe 8 into the downstream flue.

[0024] In one embodiment, the shock wave soot blower 7 is an air shock wave soot blower 7. The principle of the air shock wave soot blower 7 is that compressed air is used as a power source, and the compressed air in the shock wave tank is released instantaneously through a release device. High-energy shock waves are sprayed through a 360-degree rotating nozzle, which cleans the dust on the surface of the fiber filter pipe 8, peels off the accumulated dust and hanging materials from the fiber filter pipe 8, and achieves the purpose of cleaning the dust. The energy carrier output by the air shock wave soot blower 7 is a shock wave, which drives the vibration of the airflow in the range of action. The vibration of the airflow forces the accumulated dust to change from static to dynamic, and through the energy exchange between the sound field energy and the accumulated dust energy, the effect of cleaning the dust is achieved. It has the advantages of excellent effect, good economic performance, reliable operation, simple operation and maintenance, etc., and has good popularization and application value.

[0025] Preferably, the flue gas duct 2 is provided with an economizer 9, and the lower part of the economizer 9 is provided with a dust storage hopper 10. The lower part of the dust storage hopper 10 is provided with a dust conveying mechanism 11, and the output end of the dust removal pipe 6 extends to the dust conveying mechanism 11. The dust conveying mechanism 11 can convey the dust in the dust storage hopper 10 or the dust in the dust removal pipe 6, which is convenient for centralized treatment of the dust.

[0026] The economizer 9 is a kind of waste heat recovery equipment, which uses the heat of flue gas to heat water to improve the efficiency of the boiler and reduce fuel consumption. The economizer 9 mainly comprises upper and lower water pipes and a plurality of serpentine pipes. The upper water pipe is connected with the boiler feed water tank, and the lower water pipe is connected with the boiler hot water tank. When the boiler is running, water enters the economizer 9 from the upper water pipe, absorbs heat in the serpentine pipes, and then enters the boiler hot water tank. At the same time, flue gas enters the flue gas duct 2 and is cooled by the water in the serpentine pipes, thereby improving the thermal efficiency.

[0027] Specifically, the working process of the economizer 9 can be divided into the following steps: after the water enters the economizer 9, it first passes through a group of serpentine pipes, absorbs heat, enters the next group of serpentine pipes, and absorbs heat again, and then enters the boiler hot water tank. In the serpentine pipe, the water continuously absorbs heat, thereby increasing its own temperature. The flue gas is discharged from the tail of the boiler and enters the exhaust pipe 2, first passes through a group of serpentine pipes, is cooled by water, enters the next group of serpentine pipes, and is cooled again before being discharged from the exhaust pipe 2. In the serpentine pipe, the flue gas continuously releases heat, thereby reducing its own temperature. In this way, the economizer 9 can heat the water from a lower temperature to a higher temperature, and also can cool the flue gas from a higher temperature to a lower temperature. This heating and cooling process can improve the thermal efficiency of the boiler, reduce energy waste, and reduce fuel consumption.

[0028] The utility model sets up the economizer 9 in the exhaust pipe 2, mainly has the following several aspects's function:

[0029] 1. improve the water temperature: the economizer 9 converts the heat of boiler flue gas into the heat energy of water, improves the water temperature, thereby reducing the fuel consumption of the boiler.

[0030] 2. reduce the exhaust temperature: due to the economizer 9 absorbs the heat of boiler flue gas, the exhaust temperature is reduced significantly, reduces the environmental influence.

[0031] 3. reduce the heat loss: the economizer 9 can reduce the heat loss in the boiler exhaust, improve the thermal efficiency of the boiler, reduce energy waste.

[0032] 4. improve the boiler efficiency: through improving the water temperature and reducing the exhaust temperature, the economizer 9 can significantly improve the efficiency of the boiler, reduce fuel consumption, and reduce operating costs.

[0033] Compared with the prior art, the utility model has the following advantages:

[0034] 1. the dust collection pipe 3 is used to collect the dust in the flue gas, so that the fly ash content in the flue gas entering the rear-end flue gas purification system 12 is greatly reduced, thereby prolonging the service life of the flue gas purification system 12;

[0035] 2. reduce the fly ash content, reduce the fly ash disposal cost, and reduce the cost expenditure;

[0036] 3. the amount of fly ash is reduced, the treatment pressure of the flue gas purification system 12 is reduced, and the pollution to the environment is reduced.

[0037] In the description of the utility model, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, can be fixed connection, detachable connection, or integrated; can be mechanical connection or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the communication between two elements or the interaction relationship of two elements, for those skilled in the art, the specific meaning of the above terms in the utility model can be understood. In addition, the specific features, structures and the like described in the embodiments are included in at least one embodiment, and the features of different embodiments can be combined by those skilled in the art without mutual contradiction. The protection scope of the utility model is not limited to the above specific embodiments, according to the basic technical concept of the utility model, the embodiments that can be thought of by those skilled in the art without creative labor all belong to the protection scope of the utility model.

Claims

1. A waste incineration waste heat boiler flue gas dust removal device, comprising a dust removal pipeline (1), characterized in that, One end of the dust removal pipeline (1) is communicated with the exhaust pipeline (2) of the waste heat boiler, and the dust removal pipeline (1) is provided with a dust collection pipe row (3) in an inclined manner. The bottom of the dust collection pipe row (3) is provided with a dust collecting hopper (4), and the outlet end of the dust collecting hopper (4) is provided with a dust discharging valve (5). The dust discharging valve (5) is connected with a dust discharging pipe (6), and the dust discharging valve (5) is used for discharging the dust collected in the dust collecting hopper (4). The top of the dust collection pipe row (3) is provided with a shock wave soot blower (7), and the shock wave soot blower (7) is used for blowing the dust on the dust collection pipe row (3) into the dust collecting hopper (4).

2. The waste incineration heat recovery boiler flue gas dust removal device according to claim 1, characterized in that, The dust collection pipe row (3) comprises a plurality of parallel arranged fiber filter pipes (8), and the plurality of fiber filter pipes (8) are arranged in an inclined manner in the dust removal pipeline (1).

3. The waste incineration heat recovery boiler flue gas dust removal device according to claim 2, characterized in that, The inclination angle of the fiber filter pipe (8) is 45 degrees.

4. The waste incineration heat recovery boiler flue gas dust removal device according to claim 2, characterized in that, The top of the fiber filter pipe (8) is inclined towards the direction of the exhaust pipeline (2).

5. The waste incineration heat recovery boiler flue gas dust removal device according to claim 2, characterized by, The bottom of the fiber filter pipe (8) extends into the dust collecting hopper (4) and is in contact with the inner wall of the dust collecting hopper (4).

6. The waste incineration heat recovery boiler flue gas dust removal device according to claim 1, characterized in that, The exhaust pipeline (2) is provided with an economizer (9), and the economizer (9) is provided with a dust storage hopper (10) below.

7. The waste incineration heat recovery boiler flue gas dust removal device according to claim 6, characterized by, The dust storage hopper (10) is provided with a dust conveying mechanism (11) below, and the output end of the dust discharging pipe (6) extends to the dust conveying mechanism (11).

8. The waste incineration heat recovery boiler flue gas dust removal device according to claim 1, characterized in that, The end of the dust removal pipeline (1) away from the exhaust pipeline (2) is connected with a flue gas purification system (12).

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