Circulating fluidized bed hot water boiler

Abstract

The utility model relates to the technical field of boilers, in particular to a circulating fluidized bed hot water boiler which comprises a boiler body, a smoke outlet is formed in one side of the top of the boiler body and connected with a smoke buffering bin, the top of the smoke buffering bin is connected with a smoke collecting pipe, the outer end of the smoke collecting pipe is connected with a smoke descending pipe, and an economizer is installed at the bottom end of the smoke descending pipe. A smoke exhaust port is formed in one side of the bottom end of the economizer, the bottom of the smoke buffering bin is connected with a solid downcomer, the bottom end of the solid downcomer is connected with a discharging pipe, the bottom end of the discharging pipe is connected with a bottom combustion chamber of the boiler body, a distribution header is installed on the upper portion of one side of the boiler body, and a membrane type wall is arranged on the inner wall of the boiler body. According to the circulating fluidized bed hot water boiler, the flue gas buffering bin, the flue gas collecting pipe, the flue gas descending pipe, the coal economizer and other components are arranged, so that effective treatment of flue gas and efficient recovery of heat energy are achieved. And meanwhile, due to the design of the solid descending pipe and the anti-blocking U-shaped channel, the residues are ensured to be discharged smoothly, and the blocking phenomenon is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a circulating fluidized bed hot water boiler. Background Art

[0002] In the field of energy and industrial production, hot water boilers are an important thermal energy equipment and are widely used in various occasions that require thermal energy. Although traditional hot water boilers can meet basic thermal energy needs, they still need to be improved in terms of energy efficiency, environmental protection, and operational stability. In particular, when dealing with flue gas and solid residues generated by combustion, the design of traditional boilers is often not efficient and environmentally friendly.

[0003] In recent years, with the increasingly stringent environmental regulations and the improvement of energy efficiency requirements, circulating fluidized bed hot water boilers have gradually become a research hotspot in the industry. Circulating fluidized bed technology can improve the combustion efficiency of fuels and effectively reduce the emission of harmful substances. However, existing circulating fluidized bed boilers still have many problems in structural design, flue gas treatment and residue recovery, such as incomplete dust treatment in flue gas, low residue treatment efficiency and the need to improve heat recovery efficiency. These problems not only affect the operating efficiency and stability of the boiler, but may also have a negative impact on the environment. Utility Model Content

[0004] The purpose of the utility model is to provide a circulating fluidized bed hot water boiler to solve the problems of the existing circulating fluidized bed boiler in the above background technology in terms of structural design, flue gas treatment and residue recovery, such as incomplete treatment of dust in the flue gas, low residue treatment efficiency and the need to improve the heat recovery efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides a circulating fluidized bed hot water boiler, including a furnace body, a top side of the furnace body is provided with a smoke exhaust port connected to a smoke buffer bin, the top of the smoke buffer bin is connected to a smoke collecting pipe, the outer end of the smoke collecting pipe is connected to a smoke downcomer, the bottom end of the smoke downcomer is installed with an economizer, a bottom side of the economizer is provided with a smoke exhaust port, the bottom of the smoke buffer bin is connected to a solid downcomer, the bottom end of the solid downcomer is connected to a downcomer, the bottom end of the downcomer is connected to a bottom combustion chamber of the furnace body, a distribution header is installed on an upper part of one side of the furnace body, the inner wall of the furnace body is provided with a membrane wall, and the membrane wall is connected to the distribution header through a pipeline.

[0006] Preferably, a combustion grate is installed at the bottom of the furnace body.

[0007] Preferably, the outer wall of the distribution header is provided with a water inlet and a water outlet.

[0008] Preferably, an upper header is installed at an upper portion of one side of the furnace body, and a lower header is installed at a lower portion of one side of the furnace body. The lower header and the upper header are communicated with each other through a connecting pipe and connected to the distribution header.

[0009] Preferably, the bottom end of the solid downcomer is connected to an anti-clogging U-shaped channel, and the other end of the anti-clogging U-shaped channel is connected to the top end of the downcomer pipe.

[0010] Preferably, a cleaning port is provided at the bottom of the anti-clogging U-shaped channel, and a sealing plug is installed at the cleaning port.

[0011] Preferably, a plurality of dust-proof nets are installed inside the smoke downcomer.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In this circulating fluidized bed hot water boiler, by setting up components such as a flue gas buffer bin, a flue gas collection pipe, a flue gas downcomer, and an economizer, effective flue gas treatment and efficient recovery of heat energy are achieved. At the same time, the design of the solid downcomer and the anti-clogging U-shaped channel ensures the smooth discharge of residues, prevents the occurrence of blockage, and further improves the operating stability of the boiler. In addition, the dust-proof net installed inside the flue gas downcomer effectively removes dust from the flue gas and reduces pollution to the environment. Overall, this circulating fluidized bed hot water boiler not only improves the combustion efficiency and heat recovery rate of the fuel, but also significantly reduces the emission of harmful substances, achieving efficient and environmentally friendly operation results. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view structural schematic diagram of the utility model;

[0015] Figure 2 It is a side view structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the top structure of the utility model.

[0017] The meaning of each number in the figure is:

[0018] 1. Furnace body; 11. Smoke exhaust port; 12. Combustion grate; 2. Smoke buffer bin; 3. Smoke collecting pipe; 4. Solid downcomer; 5. Anti-blocking U-shaped channel; 6. Downcomer; 7. Smoke downcomer; 8. Economizer; 81. Smoke exhaust port; 9. Distribution header; 91. Connecting pipe; 92. Upper header; 93. Lower header; 94. Membrane wall. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model provides a circulating fluidized bed hot water boiler, such as Figure 1-Figure 3 As shown, it includes a furnace body 1, a smoke exhaust port 11 connected to a smoke buffer bin 2 is arranged on one side of the top of the furnace body 1, a smoke collecting pipe 3 is connected to the top of the smoke buffer bin 2, the outer end of the smoke collecting pipe 3 is connected to a smoke downcomer 7, an economizer 8 is installed at the bottom end of the smoke downcomer 7, a smoke exhaust port 81 is arranged on one side of the bottom end of the economizer 8, a solid downcomer 4 is connected to the bottom of the smoke buffer bin 2, a feed pipe 6 is connected to the bottom end of the solid downcomer 4, and a bottom end of the feed pipe 6 is connected to the bottom combustion chamber of the furnace body 1, a distribution header 9 is installed on the upper part of one side of the furnace body 1, a membrane wall 94 is arranged on the inner wall of the furnace body 1, and the membrane wall 94 is connected to the distribution header 9 through a pipeline, so as to be convenient for heat transfer with the high-temperature smoke in the furnace body 1, and output the water after heating.

[0021] In this embodiment, a combustion grate 12 is installed at the bottom of the furnace body 1 to facilitate the combustion of the fuel inside the furnace body 1.

[0022] Specifically, the outer wall of the distribution header 9 is provided with a water inlet and a water outlet, so as to facilitate the water inlet and water outlet operations of the distribution header 9 .

[0023] Furthermore, an upper header 92 is installed on the upper part of one side of the furnace body 1, and a lower header 93 is installed on the lower part of one side of the furnace body 1. The lower header 93 and the upper header 92 are connected through a connecting pipe 91 and connected to the distribution header 9 to facilitate the connection between the lower header 93 and the upper header 92.

[0024] Furthermore, the bottom end of the solid downcomer 4 is connected to an anti-clogging U-shaped channel 5, and the other end of the anti-clogging U-shaped channel 5 is connected to the top of the downcomer 6, so as to facilitate the collection of some large particles of solids to avoid clogging the pipeline.

[0025] Furthermore, a cleaning port is provided at the bottom of the anti-clogging U-shaped channel 5 , and a sealing plug is installed at the cleaning port to facilitate cleaning of the anti-clogging U-shaped channel 5 .

[0026] Furthermore, a plurality of dust-proof nets are installed inside the smoke downcomer 7 to improve the dust-proof effect of the smoke downcomer 7 .

[0027] When the circulating fluidized bed hot water boiler of the utility model is in use, the fuel is first ignited in the combustion chamber at the bottom of the furnace body 1 through the combustion grate 12. As the fuel burns, a large amount of heat and smoke are generated. The smoke generated by the combustion enters the smoke buffer bin 2 through the smoke exhaust port 11 at the top of the furnace body 1. Here, the smoke is initially buffered and cooled. Subsequently, the smoke is guided to the smoke downcomer 7 through the smoke collection pipe 3. In the smoke downcomer 7, a number of dust-proof nets are arranged to effectively remove dust and particulate matter in the smoke and improve the cleanliness of the smoke.

[0028] The dust-proof flue gas enters the economizer 8, where the flue gas transfers the heat it carries to the working medium (such as water), thereby realizing the recovery of heat energy. The heated working medium can be circulated through the water inlet and outlet of the distribution header 9 to provide heat energy for the external system. At the same time, the economizer 8 further reduces the temperature of the flue gas and reduces the waste of heat energy.

[0029] During the combustion process, the solid residues and large solid particles generated will enter the anti-clogging U-shaped channel 5 through the solid downcomer 4. This specially designed channel can effectively collect these residues and prevent them from clogging the pipeline. When a certain amount of residues accumulate in the anti-clogging U-shaped channel 5, it can be cleaned through the cleaning port at the bottom thereof. A sealing plug is installed at the cleaning port to ensure that no residues will leak during the cleaning process.

[0030] The distribution header 9 is connected to the membrane wall 94 on the inner wall of the furnace body 1 through a pipeline, and the membrane wall 94 exchanges heat with the high-temperature flue gas to heat the water. The heated water circulates through the upper header 92 and the lower header 93, and is finally output to the external system through the water outlet of the distribution header 9, providing hot water for various occasions requiring thermal energy.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A circulating fluidized bed hot water boiler, comprising a furnace body (1), characterized in that: A smoke exhaust port (11) is provided on one side of the top of the furnace body (1) and is connected to a smoke buffer bin (2); a smoke collecting pipe (3) is connected to the top of the smoke buffer bin (2); a smoke downpipe (7) is connected to the outer end of the smoke collecting pipe (3); an economizer (8) is installed at the bottom end of the smoke downpipe (7); a smoke exhaust port (81) is provided on one side of the bottom end of the economizer (8); a solid downpipe (4) is connected to the bottom end of the smoke buffer bin (2); a feed pipe (6) is connected to the bottom combustion chamber of the furnace body (1); a distribution header (9) is installed on the upper part of one side of the furnace body (1); a membrane wall (94) is provided on the inner wall of the furnace body (1); and the membrane wall (94) is connected to the distribution header (9) through a pipeline.

2. The circulating fluidized bed hot water boiler according to claim 1, characterized in that: A combustion grate (12) is installed at the bottom of the furnace body (1).

3. The circulating fluidized bed hot water boiler according to claim 1, characterized in that: The outer wall of the distribution header (9) is provided with a water inlet and a water outlet.

4. The circulating fluidized bed hot water boiler according to claim 3, characterized in that: An upper header (92) is installed on the upper part of one side of the furnace body (1), and a lower header (93) is installed on the lower part of one side of the furnace body (1). The lower header (93) and the upper header (92) are connected to the distribution header (9) through a connecting pipe (91).

5. The circulating fluidized bed hot water boiler according to claim 1, characterized in that: The bottom end of the solid downcomer (4) is connected to an anti-clogging U-shaped channel (5), and the other end of the anti-clogging U-shaped channel (5) is connected to the top end of the downcomer (6).

6. The circulating fluidized bed hot water boiler according to claim 5, characterized in that: The bottom of the anti-clogging U-shaped channel (5) is provided with a cleaning port, and a sealing plug is installed at the cleaning port.

7. The circulating fluidized bed hot water boiler according to claim 1, characterized in that: A plurality of dust-proof nets are installed inside the smoke downcomer (7).

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