Boiler flue gas energy-saving heat exchanger ash removal structure

Abstract

The utility model discloses a boiler flue gas energy-saving heat exchanger ash removal structure which comprises a connecting cylinder installed on the outer wall of a heat exchanger shell, the connecting cylinder is communicated with the heat exchanger shell, a flange on the connecting cylinder is connected with a horn tube, and the large-caliber end of the horn tube penetrates into the heat exchanger shell through the connecting cylinder. The small-caliber end of the horn tube is connected with a sound wave ash remover, the air inlet end of the sound wave ash remover communicates with an air supply pipe through a hose, the outer wall of the heat exchanger shell is connected with a sound insulation cover in a sealed mode, sound absorption cotton is fixedly bonded to the inner wall of the sound insulation cover, and the connecting cylinder, the horn tube and the sound wave ash remover are all located in the sound insulation cover. According to the sound wave dust remover, the sound wave dust remover is arranged, the propagation characteristic of high-power sound waves or infrasonic waves in a space medium can be utilized, accumulated dust in the heat exchanger shell can be effectively removed, the operation efficiency and safety of equipment are improved, the sound wave dust remover, the horn pipe and the connecting cylinder can be shielded through the sound insulation cover and the sound absorption cotton, and the sound wave dust remover is prevented from being damaged. Therefore, noise pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas heat exchangers, in particular to an ash cleaning structure for a boiler flue gas energy-saving heat exchanger. Background Technique

[0002] The flue gas heat exchanger is a common device in industrial production. The working principle of the heat exchanger is to achieve heat transfer through the processes of heat conduction and convective heat transfer. The heat exchanger can transfer heat directly or indirectly. The flue gas heat exchanger can effectively recover the waste heat of the flue gas, improve the energy utilization rate, thereby reducing energy consumption and achieving energy conservation and emission reduction.

[0003] Due to high humidity and high dust content, the boiler flue gas is prone to ash accumulation and blockage in the flue gas heat exchanger: the fly ash particles in the flue gas are easy to accumulate on the heat transfer surface during the flue gas flow, forming an ash accumulation layer. These ash accumulation layers not only increase the designed area of the heat exchanger, reduce the heat transfer efficiency of the heat exchanger, but also increase the difficulty of heat transfer; the formation of ash accumulation is mainly due to the deposition of fly ash in the flue gas on the heat transfer surface during the movement of the flue gas, including slagging phenomena, that is, the adhesion and deposition of molten and semi-molten fly ash particles in the flue gas on the heat transfer surface. After being used for a period of time, ash accumulation blockage and corrosion problems are likely to occur inside. Therefore, it is necessary to regularly clean and maintain the flue gas heat exchanger. Otherwise, it will affect the heat transfer efficiency and equipment performance. However, before cleaning and maintaining the flue gas heat exchanger, the operation of the boiler needs to be stopped, thus affecting the production efficiency.

[0004] To solve the above deficiencies, we propose an ash cleaning structure for a boiler flue gas energy-saving heat exchanger. Content of the Utility Model

[0005] The purpose of the utility model is to provide an ash cleaning structure for a boiler flue gas energy-saving heat exchanger to solve the problems mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An ash cleaning structure for a boiler flue gas energy-saving heat exchanger, including a connecting cylinder installed on the outer wall of the heat exchanger shell. The connecting cylinder is communicated with the heat exchanger shell, and a horn pipe is flange-connected to the connecting cylinder. The large-diameter end of the horn pipe penetrates into the heat exchanger shell through the connecting cylinder, and the small-diameter end of the horn pipe is connected with an acoustic soot blower. The air inlet end of the acoustic soot blower is communicated with an air supply pipe through a hose. The outer wall of the heat exchanger shell is hermetically connected with a sound insulation cover. The inner wall of the sound insulation cover is fixedly adhered with sound-absorbing cotton. The connecting cylinder, the horn pipe and the acoustic soot blower are all located in the sound insulation cover. The outer wall of the sound insulation cover is provided with a through hole, and the hose passes through the through hole.

[0008] As a further scheme of the utility model: The through hole is hermetically connected with the outer wall of the hose.

[0009] As a further solution of the present utility model: the sound insulation cover is connected to the heat exchanger housing by a plurality of bolts, the bolts are installed through the sound insulation cover, and threaded holes adapted to the bolts are respectively provided at the corresponding positions of the outer wall of the heat exchanger housing and the bolts.

[0010] As a further solution of the present utility model: a rubber gasket is provided between the sound insulation cover and the heat exchanger housing, rubber washers and metal washers are sleeved on the outer wall of the bolts, the rubber washers and the rubber gasket are respectively located on both sides of the outer edge of the sound insulation cover, and the rubber washer is located between the outer edge of the sound insulation cover and the metal washer.

[0011] As a further solution of the present utility model: a manual ball valve, an air pressure reducing filter and a solenoid valve are sequentially installed on the air supply pipe along the internal gas flow direction.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] By providing the acoustic soot blower, the present utility model can effectively remove the accumulated ash in the heat exchanger housing by utilizing the propagation characteristics of high-power sound waves or infrasound waves in the spatial medium, improving the operation efficiency and safety of the equipment. By providing the sound insulation cover and the sound-absorbing cotton, the acoustic soot blower, the horn pipe and the connecting cylinder can be shielded, thereby reducing the noise pollution. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a soot cleaning structure of a boiler flue gas energy-saving heat exchanger.

[0015] Figure 2 It is Figure 1 The enlarged view of part A in

[0016] Wherein, the heat exchanger housing 1, the connecting cylinder 2, the horn pipe 3, the acoustic soot blower 4, the hose 5, the air supply pipe 6, the solenoid valve 7, the air pressure reducing filter 8, the manual ball valve 9, the sound insulation cover 10, the sound-absorbing cotton 11, the perforation 12, the bolt 13, the rubber washer 14, the metal washer 15, the rubber gasket 16. Detailed Embodiment

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0018] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0019] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation as described in the specification, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0020] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0021] Please refer to Figures 1 - 2 In an embodiment of the present invention, a soot cleaning structure for a boiler flue gas energy-saving heat exchanger includes a connecting cylinder 2 installed on the outer wall of the heat exchanger housing 1. The connecting cylinder 2 is communicated with the heat exchanger housing 1, and a horn tube 3 is flange-connected to the connecting cylinder 2. The large-diameter end of the horn tube 3 penetrates into the heat exchanger housing 1 through the connecting cylinder 2, and the small-diameter end of the horn tube 3 is connected to a sonic soot blower 4. The sonic soot blower 4 uses a commercially available diaphragm-type sonic soot blower, whose main structure is made of stainless steel, and the sound generator uses a titanium metal diaphragm. The air inlet end of the sonic soot blower 4 is communicated with an air supply pipe 6 through a hose 5, and the air supply pipe 6 is communicated with a compressed air source. The outer wall of the heat exchanger housing 1 is hermetically connected with a sound insulation cover 10, and a sound-absorbing cotton 11 is fixedly adhered to the inner wall of the sound insulation cover 10. The connecting cylinder 2, the horn tube 3 and the sonic soot blower 4 are all located inside the sound insulation cover 10, and a through hole 12 is provided through the outer wall of the sound insulation cover 10, and the hose 5 passes through the through hole 12.

[0022] By adopting the above solution, in the operation cycle of the boiler and the heat exchanger, the sonic soot blower 4 is regularly started, and the compressed air can be converted into high-power sound waves or infrasonic waves, and the sound waves are introduced into the heat exchanger housing 1 through the horn tube 3. These sound waves propagate in the space medium in the form of compression and rarefaction waves, act on the accumulated ash inside the heat exchanger housing 1, and generate an alternating tensile and compressive action on the accumulated ash. This action makes the accumulated ash loosen and fall off due to fatigue, and is carried away by the flue gas flow or sinks to the ash hopper and is discharged under the action of gravity.

[0023] Specifically, sound waves propagate in an elastic medium, forming a powerful resonant sound field without dead angles. This sound field acts on the ash deposits on the heat transfer surface inside the heat exchanger through forms such as direct radiation, penetration, reflection, and diffraction, weakening and destroying the binding force between ash particles, making the ash deposits loose and detached. In short, the acoustic soot blower 4 utilizes the propagation characteristics of high-power sound waves or infrasound waves in the spatial medium to effectively remove the ash deposits in the boiler flue gas heat exchanger area, improving the operating efficiency and safety of the equipment.

[0024] In addition, through the setting of the sound insulation cover 10 and the sound absorption cotton 11, the acoustic soot blower 4, the horn tube 3, and the connecting cylinder 2 can be shielded, thereby reducing noise pollution.

[0025] In an embodiment of the present utility model, the perforation 12 is hermetically connected to the outer wall of the hose 5. Specifically, the perforation 12 and the hose 5 can be sealed with foaming glue or clay.

[0026] Specifically combined Figure 1 and Figure 2 In an embodiment of the present utility model, the sound insulation cover 10 is connected to the heat exchanger housing 1 through a plurality of bolts 13. The bolts 13 are installed through the sound insulation cover 10, and threaded holes adapted to the bolts 13 are provided at the corresponding positions on the outer wall of the heat exchanger housing 1.

[0027] Through the cooperation of the bolts 13 and the threaded holes, it is convenient to disassemble and assemble the sound insulation cover 10 on the heat exchanger housing 1, thereby facilitating the maintenance of the acoustic soot blower 4.

[0028] Specifically combined Figure 2 In an embodiment of the present utility model, a rubber gasket 16 is provided between the sound insulation cover 10 and the heat exchanger housing 1. Rubber washers 14 and metal washers 15 are sleeved on the outer wall of the bolts 13. The rubber washers 14 and the rubber gasket 16 are respectively located on both sides of the outer edge of the sound insulation cover 10, and the rubber washer 14 is located between the outer edge of the sound insulation cover 10 and the metal washer 15.

[0029] Through the setting of the wire glue washers 14 and the rubber gasket 16, the sealing performance between the heat exchanger housing 1 and the sound insulation cover 10 can be ensured.

[0030] Specifically combined Figure 1 In an embodiment of the present utility model, a manual ball valve 9, an air pressure reducing filter 8, and a solenoid valve 7 are sequentially installed on the air supply pipe 6 along the internal gas flow direction.

[0031] By using the air decompression filter 8, the air entering the acoustic soot blower 4 can be filtered and decompressed. By using the solenoid valve 7, it is convenient to remotely control the working state of the acoustic soot blower 4, and it is convenient to start the acoustic soot blower 4 regularly through the PLC controller or other upper computers.

[0032] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A soot cleaning structure for a boiler flue gas energy-saving heat exchanger, characterized in that: It includes a connecting cylinder (2) installed on the outer wall of a heat exchanger housing (1). The connecting cylinder (2) is in communication with the heat exchanger housing (1), and a horn pipe (3) is flange-connected to the connecting cylinder (2). The large-diameter end of the horn pipe (3) penetrates into the heat exchanger housing (1) through the connecting cylinder (2), and the small-diameter end of the horn pipe (3) is connected to an acoustic soot blower (4). The air inlet end of the acoustic soot blower (4) is communicated with an air supply pipe (6) through a hose (5). A sound insulation cover (10) is hermetically connected to the outer wall of the heat exchanger housing (1), and a sound-absorbing cotton (11) is fixedly adhered to the inner wall of the sound insulation cover (10). The connecting cylinder (2), the horn pipe (3), and the acoustic soot blower (4) are all located inside the sound insulation cover (10). A through hole (12) is provided through the outer wall of the sound insulation cover (10), and the hose (5) passes through the through hole (12).

2. The soot cleaning structure of a boiler flue gas energy-saving heat exchanger according to claim 1, characterized in that: The through hole (12) is hermetically connected to the outer wall of the hose (5).

3. The soot cleaning structure of a boiler flue gas energy-saving heat exchanger according to claim 1, characterized in that: The sound insulation cover (10) is connected to the heat exchanger housing (1) through a plurality of bolts (13). The bolts (13) are installed through the sound insulation cover (10), and threaded holes adapted to the bolts (13) are provided at corresponding positions on the outer wall of the heat exchanger housing (1).

4. The soot cleaning structure of a boiler flue gas energy-saving heat exchanger according to claim 3, characterized in that: A rubber gasket (16) is provided between the sound insulation cover (10) and the heat exchanger housing (1). Rubber washers (14) and metal washers (15) are sleeved on the outer wall of the bolts (13). The rubber washers (14) and the rubber gasket (16) are respectively located on both sides of the outer edge of the sound insulation cover (10), and the rubber washers (14) are located between the outer edge of the sound insulation cover (10) and the metal washers (15).

5. The soot cleaning structure of a boiler flue gas energy-saving heat exchanger according to claim 1, characterized in that: A manual ball valve (9), an air pressure reducing filter (8), and a solenoid valve (7) are sequentially installed on the air supply pipe (6) along the direction of the internal gas flow thereof.

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