Flue gas purification device of wood chip burning boiling type steam boiler

Abstract

The utility model discloses a flue gas purification device of a wood chip burning boiling type steam boiler, and relates to the technical field of flue gas purification equipment, the flue gas purification device of the wood chip burning boiling type steam boiler comprises a purification mechanism, and the main body of the purification mechanism is of an internal hollow structure. When the effect of the filter element assembly is reduced due to long-time particulate matter capturing, a worker can lift the cover plate assembly through the hanging ring assembly, so that the inserting column assembly is separated from a positioning hole in the top end of the purification box, and the filter element can be conveniently disassembled and replaced. Therefore, the filter element assembly is conveniently replaced, the device is ensured to always keep a good dust removal and purification effect, and the problem that the purification effect is influenced as a filter element of an existing device is inconvenient to replace is effectively solved.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas purification equipment, specifically a flue gas purification device for a wood chip boiling steam boiler. Background Technology

[0002] Wood-burning fluidized bed steam boilers generate large amounts of flue gas containing various pollutants during operation. These pollutants include dust, sulfur dioxide, nitrogen oxides, and some volatile organic compounds. An existing patent, CN209325817U, describes a steam boiler flue gas purification device that is easy to disassemble and maintain. It includes an installation pipe, a shelf, a flue gas impurity isolation pipe structure, a sealable flue gas cleaning pipe structure, a protective fastening pipe structure, a protective plate, a support rod, a fixing ring, a fixing pipe, a threaded rod, a cable, a fixing hook, a protective block, a fastening block, and a protective hole. The shelf is screwed to the upper part of the front surface of the installation pipe; the flue gas impurity isolation pipe structure is installed on the upper part of the installation pipe; and the sealable flue gas cleaning pipe structure is located on the upper right side of the flue gas impurity isolation pipe structure. The design of this utility model, including the connecting pipe, exhaust pipe, filter screen, mounting block, baffle plate, protective shaft, and baffle block, facilitates the isolation and filtration of impurities in the flue gas; the design of the sleeve, protective pipe, water tank, sealing cover, handle, fixing sleeve, and discharge pipe facilitates the cleaning of the discharged flue gas.

[0003] Regarding the aforementioned technologies, the inventors believe that the following defects exist: When existing purification devices are in use, the lack of an effective quick-release replacement structure for flue gas purification filter elements makes it inconvenient to replace the particulate matter capture structure after a long period of capture, thus affecting the dust removal and purification effect. Therefore, we propose a flue gas purification device for a wood-burning fluidized bed steam boiler to solve the above-mentioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a flue gas purification device for a wood-burning boiling steam boiler. This solves the problem that existing purification devices lack an effective quick-release and replacement structure for flue gas purification filter elements, making it difficult to replace the particulate matter capture structure after prolonged use, thus affecting the dust removal and purification effect.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a flue gas purification device for a wood-burning boiling steam boiler, comprising a purification mechanism, the main body of which is an internal hollow structure, and a gas supply pipe for supplying gas to the interior of the purification mechanism is fixedly connected to the left end face of the purification mechanism, and an outlet pipe is fixedly connected to the left side of the gas supply pipe and connected to the purification box through the outlet pipe.

[0006] A flue gas inlet pipe is fixedly connected to the left side of the purification box. The flue gas inlet pipe is used to connect to an external steam boiler. The exhaust pipe and the supply pipe are connected and limited by a fixing bolt.

[0007] Preferably, a cylindrical support leg assembly is fixedly connected to the bottom surface of the purification mechanism, and the support leg assembly has four locations.

[0008] Preferably, the four support leg assemblies are fixedly connected to the four corners of the bottom surface of the purification mechanism, and cylindrical pad assemblies are fixedly connected to the bottom surface of each of the four support leg assemblies. The pad assemblies and the support leg assemblies together form a support structure for the purification mechanism.

[0009] Preferably, a drain pipe for discharging waste liquid is fixedly connected to the bottom end face of the purification mechanism, and a flue gas pipe for discharging flue gas is fixedly connected to the top end face of the purification mechanism.

[0010] Preferably, the inner side of the purification mechanism is fixedly connected to a ring-shaped flow-gathering mechanism, which has an internal hollow structure, and a liquid inlet pipe for liquid inlet is fixedly connected to the right side of the flow-gathering mechanism.

[0011] Preferably, the inner side of the flow-gathering mechanism is fixedly connected with spray pipes in a ring array. The spray pipes and the flow-gathering mechanism together form a spray dust removal structure. Positioning holes are provided at the four corners of the top surface of the purification box.

[0012] Preferably, a cover plate assembly is placed on the top of the purification box. Two hanging ring assemblies are fixedly connected in a straight array on the top surface of the cover plate assembly. Insertion column assemblies are fixedly connected at the four corners of the bottom surface of the cover plate assembly. A plug column assembly is fixedly connected to the bottom surface of the cover plate assembly. A sealing ring is fixedly connected to the outside of the plug column assembly. A filter element assembly is fixedly connected to the bottom surface of the plug column assembly.

[0013] Beneficial effects

[0014] This invention provides a flue gas purification device for a wood-burning fluidized bed steam boiler. Compared with the prior art, it has the following advantages:

[0015] The flue gas purification device of this wood-burning fluidized bed steam boiler, through the installation of filter element assemblies, in conjunction with plug assemblies, sealing rings, and insert assemblies on the cover plate assembly, enables convenient disassembly and replacement of the filter elements. When the filter element assembly's effectiveness decreases due to prolonged capture of particulate matter, operators can lift the cover plate assembly using the lifting ring assembly, causing the insert assemblies to disengage from the positioning holes at the top of the purification chamber, thus facilitating the replacement of the filter element assembly. This ensures that the device maintains a consistently good dust removal and purification effect, effectively solving the problem of inconvenient filter element replacement affecting the purification effect in existing devices.

[0016] The flue gas purification device for this wood-burning fluidized bed steam boiler employs a spray dust removal structure composed of a flow-gathering mechanism and spray pipes, combined with the filtration effect of the filter element assembly, to perform multiple purifications on the flue gas. Compared to the single purification method of some existing devices, this significantly improves the removal capacity of pollutants such as dust from the flue gas of the wood-burning fluidized bed steam boiler. At the same time, the support structure composed of support leg assembly and pad block assembly makes the device more stable during operation. The design of the drain pipe and flue gas pipe ensures the smooth discharge of waste liquid and purified flue gas, optimizing the overall performance of the device and enabling it to better meet actual use requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front side view of the disassembled and cut-off flue gas purification device of this utility model.

[0018] Figure 2 This is a schematic diagram of the combined structure of the flue gas purification device of this utility model;

[0019] Figure 3 This is a top view of the flue gas purification device of this utility model;

[0020] Figure 4 This is a cross-sectional front view of the flue gas purification device of this utility model;

[0021] Figure 5 This is a schematic diagram of the combined structure of the cover plate assembly and the insert column assembly of the flue gas purification device of this utility model;

[0022] Figure 6 This is a schematic diagram of the left side of the flue gas purification device of this utility model.

[0023] In the diagram: 1. Purification mechanism; 101. Support leg assembly; 1011. Pad assembly; 1012. Drain pipe; 1013. Flue gas pipe; 2. Converging mechanism; 201. Inlet pipe; 2011. Spray pipe; 2012. Gas supply pipe; 3. Purification box; 301. Flue gas inlet pipe; 3011. Outlet pipe; 3012. Fixing bolt; 3013. Positioning hole; 3014. Cover plate assembly; 3015. Lifting ring assembly; 3016. Insertion column assembly; 3017. Plug column assembly; 3018. Sealing ring; 3019. Filter element assembly. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-6 This utility model provides a technical solution: a flue gas purification device for a wood chip boiling steam boiler, including a purification mechanism 1. The main body of the purification mechanism 1 has an internal hollow structure, and a gas supply pipe 2012 for supplying gas to the interior of the purification mechanism 1 is fixedly connected to the left end face of the purification mechanism 1. An outlet pipe 3011 is fixedly connected to the left side of the gas supply pipe 2012 and is connected to the purification box 3 through the outlet pipe 3011.

[0026] A flue gas inlet pipe 301 is fixedly connected to the left side of the purification box 3. The flue gas inlet pipe 301 is used to connect to an external steam boiler. The exhaust pipe 3011 and the gas supply pipe 2012 are connected and limited by a fixing bolt 3012.

[0027] Through the cooperation of purification mechanism 1, gas supply pipe 2012, gas outlet pipe 3011 and purification box 3, the function of external steam boiler flue gas entering purification box 3 is realized. Fixing bolt 3012 connects and limits the gas outlet pipe 3011 and gas supply pipe 2012 to ensure a stable connection.

[0028] See Figures 1-5 A cylindrical support leg assembly 101 is fixedly connected to the bottom surface of the purification mechanism 1. The support leg assembly 101 has four locations.

[0029] By setting four support leg assemblies 101 at the bottom of the purification mechanism 1, the purification mechanism 1 is supported and kept stable during operation.

[0030] See Figures 2-4 Four support leg assemblies 101 are fixedly connected to the four corners of the bottom surface of the purification mechanism 1. A cylindrical pad assembly 1011 is fixedly connected to the bottom surface of each of the four support leg assemblies 101. The pad assembly 1011 and the support leg assembly 101 together form a support structure for the purification mechanism 1.

[0031] The pad assembly 1011 at the bottom of the support leg assembly 101 and the support leg assembly 101 together support the purification mechanism 1, dispersing the pressure of the purification mechanism 1 on the ground and enhancing the stability of the support.

[0032] See Figures 5-6 A drain pipe 1012 for discharging waste liquid is fixedly connected to the bottom end face of the purification mechanism 1, and a flue gas pipe 1013 for discharging flue gas is fixedly connected to the top end face of the purification mechanism 1.

[0033] Waste liquid generated during the purification process can be discharged through drain pipe 1012, and flue gas pipe 1013 is used to discharge purified flue gas, ensuring the smooth progress of the purification work.

[0034] See Figures 1-4The inner side of the purification mechanism 1 is fixedly connected to a ring-shaped flow-gathering mechanism 2. The flow-gathering mechanism 2 has an internal hollow structure, and a liquid inlet pipe 201 for liquid inlet is fixedly connected to the right side of the flow-gathering mechanism 2.

[0035] By cooperating with the flow-gathering mechanism 2 and the liquid inlet pipe 201, liquid can flow into the flow-gathering mechanism 2, preparing for subsequent spray dust removal.

[0036] See Figures 2-5 The inner side of the flow-gathering mechanism 2 is fixedly connected with a spray pipe 2011 in a ring array. The spray pipe 2011 and the flow-gathering mechanism 2 together form a spray dust removal structure. Positioning holes 3013 are opened at the four corners of the top surface of the purification box 3.

[0037] The dust removal structure is formed by the flow-concentrating mechanism 2 and the spray pipe 2011 to remove dust from the flue gas. The positioning hole 3013 at the top of the purification box 3 provides positioning for the installation of the cover plate assembly 3014.

[0038] See Figures 3-5 The top of the purification box 3 is equipped with a cover plate assembly 3014. Two hanging ring assemblies 3015 are fixedly connected in a straight array on the top surface of the cover plate assembly 3014. Insertion column assemblies 3016 are fixedly connected at the four corners of the bottom surface of the cover plate assembly 3014. A plug column assembly 3017 is fixedly connected to the bottom surface of the cover plate assembly 3014. A sealing ring 3018 is fixedly connected to the outside of the plug column assembly 3017. A filter element assembly 3019 is fixedly connected to the bottom surface of the plug column assembly 3017.

[0039] The lifting ring assembly 3015 on the cover plate assembly 3014 facilitates transportation. The insert assembly 3016, in conjunction with the positioning hole 3013, installs the cover plate assembly 3014. The plug assembly 3017, sealing ring 3018, and filter element assembly 3019 can filter the flue gas and facilitate the disassembly and replacement of the filter element assembly 3019.

[0040] During operation, the flue gas generated by the wood-burning fluidized bed steam boiler first enters the purification box 3 through the flue gas inlet pipe 301. The flue gas inlet pipe 301 is fixedly connected to the left side of the purification box 3 and is closely connected to the external steam boiler, providing a channel for the flue gas to enter the purification system. The purification box 3 is connected to the air supply pipe 2012 of the purification mechanism 1 through the air outlet pipe 3011. The air outlet pipe 3011 and the air supply pipe 2012 are connected and limited by the fixing bolt 3012. The fixing bolt 3012 ensures the stability of the connection between the two pipes, prevents loosening or falling off during the flue gas transmission process, and ensures that the flue gas can flow stably from the purification box 3 into the purification mechanism 1.

[0041] Preparation for spray dust removal: Liquid (usually a solution with dust removal function, such as clean water or a solution with added specific dust removal agent) flows into the flow gathering mechanism 2 from the liquid inlet pipe 201. The liquid inlet pipe 201 is fixedly connected to the right side of the flow gathering mechanism 2. The flow gathering mechanism 2 is annular and hollow inside. After the liquid flows into the flow gathering mechanism 2, it will gather inside it to store and distribute liquid resources for subsequent spraying work, ensuring that each spray pipe 2011 can obtain a sufficient liquid supply.

[0042] Inside the flow-gathering mechanism 2, spray pipes 2011 are arranged in a ring array. When the liquid is ready in the flow-gathering mechanism 2, under pressure (which can be provided by an external liquid supply pump or by the liquid's own gravity and the pressure difference inside the system), the liquid is sprayed out from the spray pipes 2011. The spray pipes 2011 and the flow-gathering mechanism 2 together form a spray dust removal structure. The sprayed liquid forms a fine water mist or water flow. When the flue gas flowing from the purification box 3 into the purification mechanism 1 rises and passes through this area, the liquid comes into full contact with the flue gas. The liquid can adsorb and encapsulate the dust particles in the flue gas, increasing their weight and causing them to settle down. This process effectively removes a large amount of dust from the flue gas, achieving preliminary purification of the flue gas.

[0043] Secondary filtration and purification: After initial purification by spray dust removal, the flue gas continues to rise, reaching the cover assembly 3014 placed at the top of the purification chamber 3. The insert assemblies 3016, fixedly connected to the four corners of the bottom surface of the cover assembly 3014, cooperate with the positioning holes 3013 at the four corners of the top surface of the purification chamber 3, ensuring accurate installation of the cover assembly 3014 on the purification chamber 3. The plug assembly 3017, fixedly connected to the bottom surface of the cover assembly 3014, has a sealing ring 3018 fixedly connected to its outer side that fits tightly against the corresponding position inside the purification chamber 3, providing a good seal and preventing leakage of unfiltered flue gas. The filter element assembly 3019, fixedly connected to the bottom surface of the plug assembly 3017, performs secondary filtration of the rising flue gas. The filter element assembly 3019 is typically made of materials with high-efficiency filtration performance, such as filter screens or filter cotton with specific pore sizes, capable of capturing residual fine particulate matter in the flue gas, further improving the purification level of the flue gas, so that the final discharged flue gas meets stricter environmental standards.

[0044] Waste liquid and purified flue gas discharge: During the spray dust removal process, the liquid that has adsorbed dust and other pollutants becomes waste liquid. The drain pipe 1012, which is fixedly connected to the bottom end of the purification mechanism 1, is responsible for discharging this waste liquid. The drain pipe 1012 can be connected to a special waste liquid treatment system for subsequent treatment of the waste liquid to avoid environmental pollution. The clean flue gas, after being filtered and purified by the filter element assembly 3019, is discharged through the flue gas pipe 1013, which is fixedly connected to the top end of the purification mechanism 1. The flue gas pipe 1013 guides the purified flue gas into the atmosphere or other subsequent treatment equipment to complete the entire flue gas purification process.

[0045] In summary, this device, by incorporating the filter element assembly 3019, can achieve rapid filtration of flue gas.

[0046] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A flue gas purification device for a wood-burning fluidized bed steam boiler, comprising a purification mechanism (1), characterized in that: The main body of the purification mechanism (1) is a hollow structure, and an air supply pipe (2012) for supplying air to the interior of the purification mechanism (1) is fixedly connected to the left end face of the purification mechanism (1). An air outlet pipe (3011) is fixedly connected to the left side of the air supply pipe (2012) and is connected to the purification box (3) through the air outlet pipe (3011). The purification box (3) is fixedly connected to a flue gas inlet pipe (301) on the left side. The flue gas inlet pipe (301) is used to connect to an external steam boiler. The outlet pipe (3011) and the supply pipe (2012) are connected and limited by a fixing bolt (3012).

2. The flue gas purification device for a wood-burning fluidized bed steam boiler according to claim 1, characterized in that: The bottom surface of the purification mechanism (1) is fixedly connected to a cylindrical support leg assembly (101), which has four locations.

3. The flue gas purification device for a wood-burning fluidized bed steam boiler according to claim 2, characterized in that: The four support leg assemblies (101) are fixedly connected to the four corners of the bottom surface of the purification mechanism (1). A cylindrical pad assembly (1011) is fixedly connected to the bottom surface of each of the four support leg assemblies (101). The pad assembly (1011) and the support leg assembly (101) together form a support structure for the purification mechanism (1).

4. The flue gas purification device for a wood-burning fluidized bed steam boiler according to claim 1, characterized in that: The bottom end face of the purification mechanism (1) is fixedly connected to a drain pipe (1012) for discharging waste liquid, and the top end face of the purification mechanism (1) is fixedly connected to a flue gas pipe (1013) for discharging flue gas.

5. The flue gas purification device for a wood-burning fluidized bed steam boiler according to claim 1, characterized in that: The purification mechanism (1) is fixedly connected to a ring-shaped flow-gathering mechanism (2). The flow-gathering mechanism (2) has an internal hollow structure, and a liquid inlet pipe (201) for liquid inlet is fixedly connected to the right side of the flow-gathering mechanism (2).

6. The flue gas purification device for a wood-burning fluidized bed steam boiler according to claim 5, characterized in that: The inner side of the flow-gathering mechanism (2) is fixedly connected with a spray pipe (2011) in a ring array. The spray pipe (2011) and the flow-gathering mechanism (2) together form a spray dust removal structure. Positioning holes (3013) are opened at the four corners of the top surface of the purification box (3).

7. The flue gas purification device for a wood-burning fluidized bed steam boiler according to claim 6, characterized in that: The top of the purification box (3) is equipped with a cover plate assembly (3014). Two hanging ring assemblies (3015) are fixedly connected in a straight array on the top surface of the cover plate assembly (3014). Insertion column assemblies (3016) are fixedly connected at the four corners of the bottom surface of the cover plate assembly (3014). A plug column assembly (3017) is fixedly connected to the bottom surface of the cover plate assembly (3014). A sealing ring (3018) is fixedly connected to the outside of the plug column assembly (3017). A filter element assembly (3019) is fixedly connected to the bottom surface of the plug column assembly (3017).

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