Self-dedusting flue system and boiler with same

Abstract

The utility model provides a self-dedusting flue system and a boiler with the same, and belongs to the field of boiler manufacturing. The problems that dust accumulation is serious, and a conventional treatment means is complex in structure and high in cost are solved. The device comprises a main flue which is connected with a horizontal flue through an extraction opening; one end of the ash hopper is communicated with the horizontal flue; the circulating flues are connected to the outlet ends of the ash hoppers in a one-to-one correspondence manner, and the other end of each circulating flue is communicated with the main flue at a certain included angle, so that dust flows back into the main flue along the circulating flues under the action of gravity; and the switch assemblies are arranged in the circulating flues and used for controlling opening and closing of the corresponding circulating flues. The device is mainly used for maintaining stable operation of the boiler.

Description

Technical Field

[0001] The utility model belongs to the field of boiler manufacturing, in particular to a self-ash removal flue system and a boiler with the same. Background Art

[0002] Some boilers need to extract flue gas from the furnace or tail flue for other uses, so it is necessary to add a connecting flue.

[0003] The flue used for connection usually has a horizontal section, and the horizontal section of the flue will inevitably accumulate dust. There are many hazards caused by dust accumulation, mainly the following: dust accumulation will change the airflow distribution in the flue, which may cause uneven flue gas flow, increase flue resistance, reduce smoke extraction and affect heat exchange efficiency; severe dust accumulation may cause overload of the flue support structure, and even cause structural deformation or damage, thus affecting the safe operation of the entire power station; dust accumulation needs to be cleaned regularly, which not only increases the workload of operation and maintenance, but also may cause additional downtime and increase maintenance costs;

[0004] The conventional approach is to make an ash hopper, add an ash removal pump system or other devices to remove ash. The system is complex and costly, as follows Figure 5 As shown. To this end, it is necessary to develop a simple and low-cost ash removal system. Summary of the invention

[0005] In view of this, the utility model aims to provide a self-ash removal flue system and a boiler having the same, so as to solve the problem of severe ash accumulation and the complex structure and high cost of conventional treatment means.

[0006] To achieve the above objectives, the utility model adopts the following technical solutions. According to one aspect of the utility model, a self-ash removal flue system is provided, comprising:

[0007] The main flue is connected to the horizontal flue through the air extraction port;

[0008] An ash hopper is provided, at least one of which is connected to the horizontal flue at one end;

[0009] A circulating flue is connected to the outlet end of each ash hopper one by one, and the other end of each circulating flue is connected to the main flue at a certain angle so that the dust flows back to the main flue along the circulating flue under the action of gravity;

[0010] A switch component is arranged in each of the circulating flue to control the opening and closing of the corresponding circulating flue.

[0011] Furthermore, the switch component is an electrically controlled valve.

[0012] Furthermore, the switch component is a baffle and its upper position is pivotally connected to the circulating flue.

[0013] Furthermore, the baffle shape is adapted to the cross section of the circulating flue.

[0014] Furthermore, a cooling component is provided at the connection point between the circulating flue and the main flue.

[0015] Furthermore, the cooling component is a cold water pipe and is coupled to a circulating flue.

[0016] Furthermore, the cooling component is an air duct and cold air is blown in the air duct, and the circulating flue is at least partially arranged in the air duct.

[0017] Furthermore, a vibration device is provided on the circulating flue.

[0018] Furthermore, the vibrating end of the jarring device is coupled to the wall of the circulating flue.

[0019] According to another aspect of the utility model, a boiler is provided, comprising a self-ash removal flue system as described above.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The structure of this system is simple and reliable. It can automatically process the dust accumulation in the horizontal flue by means of reflux. It only needs to use the height difference to complete the dust processing. No additional power components are required, which reduces the operating cost. At the same time, it reduces the use of electronic components, which can reduce the production cost and the failure rate, ensure the stable operation of the system, and avoid the dust accumulation problems mentioned in the background technology caused by excessive dust.

[0022] 2. This system can disperse the ash accumulation by setting up multiple ash hoppers, which will not cause the problem of excessive weight concentration and load concentration caused by concentrated ash accumulation. At the same time, this setting method also has the effect of improving the stability of the system, because through the setting of multiple ash hoppers and multiple corresponding circulating flues, when one or several circulating flues are blocked, the other circulating flues can still discharge dust normally, which can prevent the phenomenon of collective blockage causing dust to be unable to be discharged and causing system paralysis, and can also reduce the occupied space height;

[0023] 3. This system can prevent the phenomenon of flue gas backflow in the circulating flue by setting the switch component. At the same time, the switch component of this system must be in the state of dust discharge when it is turned on. The dust can prevent the gas from the main flue from flowing back into the circulating flue. At the same time, the dust here will play a role in assisting the dust to enter the main flue due to the Bernoulli principle, helping the dust backflow process to be smoother;

[0024] 4. This system uses a simple and reliable structure to return dust to the main flue, which reduces costs while directing the dust back to the main flue. The dust is discharged from the main flue and directed to other places for treatment, which can avoid the impact of dust accumulation on the flue when extracting flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 It is a structural schematic diagram of a specific implementation mode 1 of a self-ash removal flue system according to the utility model;

[0027] Figure 2 This is a structural schematic diagram of a second specific implementation mode of a self-ash removal flue system according to the utility model;

[0028] Figure 3 This is a state diagram of the switch assembly of the utility model when it is closed;

[0029] Figure 4 This is a state diagram of the switch assembly of the utility model when it is turned on;

[0030] Figure 5 It is a schematic diagram of a traditional dust removal system described in the utility model.

[0031] Main flue 1; horizontal flue 2; ash hopper 3; circulating flue 4; switch assembly 5. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely explain the technical solutions in the embodiments of the utility model. It should be noted that the embodiments and features in the embodiments of the utility model can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0033] It should be noted that the descriptions of the present invention regarding directions such as "left", "right", "left side", "right side", "upper", "lower", "top", "bottom", etc. are all defined based on the relationship between the orientations or positions shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure described must be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Specific implementation method one:

[0036] See attached Figure 1 , 2 5 illustrate this embodiment, according to one aspect of the utility model, a self-ash removal flue system is provided, comprising:

[0037] The main flue 1 is connected to the horizontal flue 2 through the exhaust port; the main flue 1 is the furnace or tail flue of the boiler, which is the existing technology and will not be introduced in detail;

[0038] At least one ash hopper 3 is provided and one end of the ash hopper 3 is connected to the horizontal flue 2. The horizontal flue 2 is provided, and at least one ash hopper 3 is provided below the horizontal flue 2 to be connected to the horizontal flue 2. As the smoke moves with the gas, it will gradually move downward under the action of gravity and finally settle in the ash hopper 3. The ash hopper 3 can play the role of settling and storing the smoke.

[0039] The circulating flue 4 is connected to the outlet end of each of the ash hoppers 3 one by one, and the other end of each of the circulating flues 4 is connected to the main flue 1 at a certain angle so that the dust can flow back into the main flue 1 along the circulating flue 4 under the action of gravity; the setting of the circulating flue 4 can reconnect the ash hopper 3 with the main flue 1, and in order to simplify components and reduce maintenance and use costs, the circulating flue 4 is arranged to be connected to the main flue 1 in an inclined manner, so that the dust can naturally flow back under the action of gravity after accumulation, without relying on other power components, thereby reducing the use cost and the production cost of the system.

[0040] The switch assembly 5 is arranged in each of the circulating flues 4 to control the opening and closing of the corresponding circulating flues 4. The switch assembly 5 is arranged to accumulate dust and close the circulating flues 4. When the circulating flues 4 are closed under normal conditions, it is to prevent the gas in the main flue 1 from flowing into the circulating flue 4 to cause secondary dust and unnecessary escape of gas. When a certain amount of dust accumulates, it will flow under the action of gravity, so that the dust in the circulating flue 4 will not be affected by the gas backflow when it is poured. At the same time, in this discharge mode, the gas flow in the main flue 1 will form a drainage effect here, helping the dust to move from the circulating flue 4 to the main flue 1, playing a role in drainage flow.

[0041] In this embodiment, the switch assembly 5 is an electrically controlled valve, which can be opened and closed by electronic control.

[0042] When in use, air is extracted in the main flue 1 through the exhaust port, and the dust is gradually deposited in the ash hopper 3 during movement. The deposited dust can flow back to the main flue 1 through the circulating flue 4 and flow away from other locations without affecting the horizontal flue of the exhaust section. Specific implementation method 2:

[0044] See attached Figure 1 , 2 , 3, 4 and 5 illustrate this embodiment. The difference between this embodiment and the specific implementation mode 1 is that the switch component 5 is a baffle and its upper position is pivotally connected to the circulating flue 4.

[0045] In this embodiment, the baffle shape is adapted to the cross section of the circulating flue 4 .

[0046] By configuring the switch assembly 5 as a baffle and pivotally connecting it to the circulating flue 4 at an upper position, the system operates entirely on the deadweight of the dust. When the dust accumulates to a certain amount, it will overcome the weight of the baffle, causing the baffle to rotate along its pivot axis, thereby discharging the dust. At the same time, in conjunction with the gas drainage effect in the main flue 1, the balance is further broken to help the dust quickly flow back into the main flue 1 and then be discharged with the airflow. Specific implementation method three:

[0048] See attached Figure 1 , 2 , 3, 4 and 5 illustrate this embodiment. The difference between this embodiment and specific implementation modes one and two is that a cooling component is arranged at the connection between the circulating flue 4 and the main flue 1. By setting the cooling component, the connection between the circulating flue 4 and the main flue 1 can be cooled to prevent the flue from burning. Specific implementation method four:

[0050] See attached Figure 1 , 2 , 3, 4 and 5 illustrate this embodiment. The difference between this embodiment and specific implementation method three is that the cooling component is a cold water pipe and is coupled to the circulating flue 4; the cold water pipe can be connected to the outer wall of the circulating flue 4 in a winding manner, and the circulating flue 4 is cooled by passing circulating coolant into the cold water pipe, thereby ensuring that the circulating flue 4 is not burned. Specific implementation method five:

[0052] See attached Figure 1 , 2, 3, 4 and 5 illustrate this embodiment. The difference between this embodiment and the specific embodiment 4 is that the cooling component is an air duct and cold air is blown in the air duct, and the circulating flue 4 is at least partially arranged in the air duct. The circulating flue 4 is cooled in the form of cold air. The source of the cold air can be achieved by blowing air from a fan. Specific implementation method six:

[0054] See attached Figure 1 , 2 , 3, 4 and 5 illustrate this embodiment. The difference between this embodiment and specific implementation modes one, two, three, four and five is that a vibrating device is provided on the circulating flue 4, and the vibrating end of the vibrating device is coupled to the pipe wall of the circulating flue 4. By providing the vibrating device, an exciting force can be applied to the circulating flue 4 through the vibrating end, and the dust can be helped to move by means of vibration, so as to prevent dust from being stuck and causing the dust to not flow downward, thereby ensuring the smooth progress of the ash discharge process. The vibrating device can adopt the existing technology, and any device that can generate an exciting force can be coupled with the circulating flue 4 in this system through a certain structural form to achieve the purpose of vibration discharge, and no specific limitation is made here.

[0055] According to another aspect of the utility model, a boiler is provided, comprising the above-mentioned self-ash removal flue system.

[0056] The embodiments of the utility model disclosed above are only used to help explain the utility model. The embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model.

Claims

1. A self-ash removal flue system, characterized in that: include: The main flue (1) is connected to the horizontal flue (2) through an air extraction port; An ash hopper (3) is provided with at least one ash hopper (3) and one end of the ash hopper is connected to the horizontal flue (2); A circulating flue (4) is connected to the outlet end of each ash hopper (3) in a one-to-one correspondence, and the other end of each circulating flue (4) is connected to the main flue (1) at a certain angle so that dust flows back into the main flue (1) along the circulating flue (4) under the action of gravity; A switch component (5) is arranged in each of the circulating flues (4) and is used to control the opening and closing of the corresponding circulating flue (4).

2. A self-ash removal flue system according to claim 1, characterized in that: The switch component (5) is an electrically controlled valve.

3. The self-ash removal flue system according to claim 1, characterized in that: The switch component (5) is a baffle and its upper position is pivotally connected to the circulating flue (4).

4. A self-ash removal flue system according to claim 3, characterized in that: The shape of the baffle plate is adapted to the section of the circulating flue (4).

5. The self-ash removal flue system according to claim 1, characterized in that: A cooling component is provided at the connection point between the circulating flue (4) and the main flue (1).

6. The self-ash removal flue system according to claim 5, characterized in that: The cooling component is a cold water pipe and is coupled to the circulating flue (4).

7. The self-ash removal flue system according to claim 5, characterized in that: The cooling component is an air duct and cold air is blown in the air duct, and the circulating flue (4) is at least partially arranged in the air duct.

8. The self-ash removal flue system according to claim 1, characterized in that: A beating device is provided on the circulating flue (4).

9. The self-ash removal flue system according to claim 8, characterized in that: The vibrating end of the jarring device is coupled to the pipe wall of the circulating flue (4).

10. A boiler, characterized in that: It comprises a self-ash removal flue system as claimed in any one of claims 1 to 9.

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