Efficient unblocking device for air pre-heater

Abstract

The utility model relates to the technical field of air pre-heater unblocking, in particular to an air pre-heater efficient unblocking device which comprises a main body mechanism serving as a device main body, and the main body mechanism comprises a protective shell and an air pre-heater body located in the protective shell. A blockage clearing mechanism used for clearing blockages at the bottom of the air pre-heater body is arranged in the main body mechanism and comprises a steam communicating pipe, and a discharging pipe is fixedly connected to the top end of the steam communicating pipe. According to the air pre-heater, the blockage clearing mechanism is arranged, so that the air pre-heater can effectively clear blockage at the bottom of the air pre-heater body, high-temperature steam is released by the multiple spray heads through the steam communicating pipe, the blockage in the rotating process is comprehensively heated, the gasification effect is achieved, and the air pre-heater is high in practicability. And in cooperation with the steel wire brush plate, blockages attached to the bottom of the air pre-heater are swept and cleaned, the blockage cleaning effect of the device is guaranteed, and heat exchange elements in the air pre-heater body are prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheater clogging cleaning, in particular to an efficient air preheater clogging cleaning device. Background Art

[0002] When the metal wall temperature is lower than the dew point temperature of ammonium bisulfate, ammonium bisulfate gas will condense into highly viscous liquid ammonium bisulfate on the metal wall, adhering to the fly ash in the flue gas and causing serious blockage of the air preheater. In the prior art, when cleaning the air preheater, water is mostly directly used for flushing. However, although on-line water flushing can quickly and efficiently solve the problem of air preheater blockage, due to the vaporization phenomenon of water, the flue gas discharge temperature will be reduced, thus affecting the heat exchange efficiency of the air preheater and significantly shortening the service life of the heat exchange elements of the air preheater. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides an efficient air preheater clogging cleaning device, which has the advantages of being able to effectively clean the blockage and reducing damage to the heat exchange elements, and solves the problem that directly flushing with water in the prior art will significantly shorten the service life of the heat exchange elements of the air preheater.

[0004] To solve the above technical problems, the utility model provides the following technical solutions:

[0005] An efficient air preheater clogging cleaning device includes a main body mechanism as the device main body. The main body mechanism includes a protective shell and an air preheater body located inside the protective shell. A clogging cleaning mechanism for cleaning the blockage at the bottom of the air preheater body is arranged in the main body mechanism. The clogging cleaning mechanism includes a steam connecting pipe. The top end of the steam connecting pipe is fixedly connected with a discharge pipe. The top of the discharge pipe is fixedly communicated with a plurality of branch pipes. Spray heads are installed at the tops of the plurality of branch pipes. A plurality of acoustic wave generators are installed at the bottom of the air preheater body. Through holes are opened on both sides of the protective shell. Clamping blocks are clamped in the two through holes. A connecting block is fixedly connected to the opposite sides of the two clamping blocks. Wire brush plates are installed on both sides of the two connecting blocks. Semi-circular rings are fixedly connected to the opposite sides of the two connecting blocks. A magnetic block a and a magnetic block b are respectively installed on the opposite sides of the two semi-circular rings. Fixing components are arranged on both connecting blocks.

[0006] Preferably, the fixing components include sliding grooves opened on both sides of the two connecting blocks. Sliding blocks are slidably connected in the plurality of sliding grooves. Through grooves are opened on both sides of the two semi-circular rings.

[0007] Preferably, the plurality of sliding grooves are respectively communicated with the plurality of through grooves. The plurality of sliding blocks are respectively connected with the plurality of wire brush plates.

[0008] Preferably, a flue gas inlet, a primary air outlet, and a secondary air outlet are fixedly connected to the top of the protective housing respectively, and a flue gas outlet, a primary air inlet, and a secondary air inlet are fixedly connected to the bottom of the protective housing respectively.

[0009] Preferably, one side of the steam communication pipe is fixedly connected to the inner wall of the flue gas outlet, and sealing rings are installed at the connection gaps between the two clamping blocks and the two through holes.

[0010] Preferably, connection housings are fixedly connected to both the top and the bottom of the protective housing. A connection shaft is installed at the center of the air preheater body, and a servo motor for driving the connection shaft is installed on the connection housing.

[0011] By means of the above technical solutions, the present utility model provides an efficient clogging removal device for an air preheater, which at least has the following beneficial effects:

[0012] 1. By setting the clogging removal mechanism, the device can effectively clean the blockages at the bottom of the air preheater body. High-temperature steam is released from multiple nozzles through the steam communication pipe, so that the blockages during rotation are fully heated to achieve a gasification effect, and the blockages attached to the bottom of the air preheater are swept and cleaned by the wire brush plate, ensuring the clogging removal effect of the device and avoiding damage to the heat exchange elements inside the air preheater body.

[0013] 2. By setting the fixing component, the device can simply disassemble and assemble multiple wire brush plates. By pulling the two clamping blocks, the two magnetic blocks a and the two magnetic blocks b are separated. Through the two through holes, the connecting block and the wire brush plate are separated from the protective housing. After the limit of the connecting shaft disappears, the wire brush plate is directly disassembled through the slider, the chute, and the through groove, so as to facilitate its cleaning and replacement, improving the simplicity of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present utility model and form a part of this application:

[0015] Figure 1 is a three-dimensional structural diagram of the present utility model;

[0016] Figure 2 is a structural diagram of the main mechanism of the present utility model;

[0017] Figure 3 is a structural diagram of the clogging removal mechanism of the present utility model;

[0018] Figure 4 is an exploded view of the fixing component of the present utility model.

[0019] Reference numerals:

[0020] 1. Main body mechanism; 101. Protective housing; 102. Flue gas inlet; 103. Flue gas outlet; 104. Secondary air outlet; 105. Secondary air inlet; 106. Primary air outlet; 107. Primary air inlet; 2. Blockage clearing mechanism; 201. Steam connecting pipe; 202. Drain pipe; 203. Branch pipe; 204. Sprayer; 205. Sonic generator; 206. Through hole; 207. Block; 208. Connecting block; 209. Steel wire brush plate; 210. Semi-circular ring; 211. Magnet a; 212. Magnet b; 213. Fixing component; 2131. Slide groove; 2132. Slide block; 2133. Through slot. Detailed implementation manner

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the prior art, when cleaning the blockages on the air preheater, most of them directly wash it with water. However, during this process, the contact between water and the heat exchange element will cause vaporization, resulting in a decrease in the flue gas discharge temperature of the device, affecting the heat exchange efficiency of the air preheater, and thus greatly reducing the service life of the heat exchange element. The following describes some embodiments of the present invention with reference to the accompanying drawings to provide an efficient blockage clearing device for an air preheater.

[0023] Embodiment 1:

[0024] To ensure the heat exchange efficiency of the air preheater body, as shown in Figures 1-4 , an efficient blockage clearing device for an air preheater is proposed. By setting the main body mechanism 1 as the device main body, a blockage clearing mechanism 2 is arranged inside the main body mechanism 1, and the blockage clearing mechanism 2 is used to effectively clean the blockages at the bottom of the air preheater body.

[0025] In order to enable the device to effectively clean the blockages inside the air preheater body, a blockage cleaning mechanism 2 is proposed. By installing a steam connecting pipe 201, the top of the steam connecting pipe 201 is fixedly connected to a discharge pipe 202. The top of the discharge pipe 202 is fixedly connected and communicated with a plurality of branch pipes 203. The tops of the plurality of branch pipes 203 are all installed with spray nozzles 204. A plurality of acoustic wave generators 205 are installed at the bottom of the air preheater body. Through holes 206 are opened on both sides of the protective housing 101. Snap blocks 207 are clamped in the two through holes 206. A connecting block 208 is fixedly connected to the opposite sides of the two snap blocks 207. Wire brush plates 209 are installed on both sides of the two connecting blocks 208. Semi-circular rings 210 are fixedly connected to the opposite sides of the two connecting blocks 208. A magnetic block a 211 and a magnetic block b 212 are respectively installed on the opposite sides of the two semi-circular rings 210. Fixing components 213 are arranged on the two connecting blocks 208. Sealing rings are installed at the connection gaps between the two snap blocks 207 and the two through holes 206. Non-directionally propagated acoustic waves are generated by the acoustic wave generators 205, so as to penetrate deep into the air preheater elements and directly act on the ash accumulation parts, making the blockages loose. The two semi-circular rings 210 can be sleeved on the connecting shaft by the two magnetic blocks a 211 and the two magnetic blocks b 212. The position of the steam connecting pipe 201 is fixed by the inner wall of the flue gas outlet 103. High-temperature steam enters the discharge pipe 202 from the steam connecting pipe 201, and then enters the plurality of branch pipes 203 from the discharge pipe 202, and is thus released by the plurality of spray nozzles 204, so that the high-temperature steam is sprayed upward from the bottom into the air preheater, thereby quickly heating the blocked parts to vaporize ammonium bisulfate. The wire brush plates 209 are used to further sweep and clean the blockages attached to the bottom of the air preheater, ensuring the blockage cleaning effect of the device and avoiding damage to the heat exchange elements inside the air preheater body.

[0026] Embodiment Two:

[0027] On the basis of Embodiment One, the technical solution proposed in Embodiment One is used to solve the problems in the prior art that the vaporization phenomenon caused by water flushing will reduce the flue gas temperature, thereby affecting the heat exchange efficiency of the air preheater and greatly shortening the service life of the heat exchange elements of the air preheater. However, after the wire brush plates 209 sweep the blockages, in order to ensure the cleaning effect of the wire brushes, they should be simply replaced regularly.

[0028] In order to simply clean and replace the wire brushes, in combination with Figure 1 and Figure 2 and Figure 4As shown in the figure, a fixing component 213 is proposed. By opening sliding grooves 2131 on both sides of two connecting blocks 208, sliders 2132 are slidably connected in multiple sliding grooves 2131. Through grooves 2133 are opened on both sides of two semi-circular rings 210. By pulling two clamping blocks 207, separation occurs between two magnetic blocks a 211 and two magnetic blocks b 212. Through two through holes 206, the connecting block 208, the wire brush plate 209 and the protective housing 101 are separated. After the limit of the connecting shaft disappears, by moving the slider 2132 through the sliding groove 2131 and the through groove 2133 in sequence, the wire brush plate 209 can be directly disassembled, thus facilitating its cleaning and replacement and improving the simplicity of the device.

[0029] In order to fix the position of the plugging removal mechanism 2, a main body mechanism 1 is proposed. By installing a protective housing 101 and an air preheater body located inside the protective housing 101, a flue gas inlet 102, a primary air outlet 106 and a secondary air outlet 104 are respectively fixedly connected to the top of the protective housing 101, and a flue gas outlet 103, a primary air inlet 107 and a secondary air inlet 105 are respectively fixedly connected to the bottom of the protective housing 101. Connecting shells are fixedly connected to both the top and the bottom of the protective housing 101. A connecting shaft is installed at the center of the air preheater body, and a servo motor for driving the connecting shaft is installed on the connecting shell. By driving the connecting shaft through the servo motor, the air preheater body rotates inside the protective housing 101. Flue gas is introduced through the flue gas inlet 102 and the flue gas outlet 103, and heat exchange is carried out through the tubular air preheater to reduce the flue gas discharge temperature, recover the heat in the flue gas and improve the energy utilization efficiency. Necessary air is provided for the combustion process through the primary air inlet 107 and the primary air outlet 106 to support the combustion of pulverized coal. A certain amount of hot air is provided to the boiler furnace through the secondary air inlet 105 and the secondary air outlet 104. Its function is to enhance the disturbance, extend the residence time of the hot flue gas in the furnace and the vertical flue, adjust the oxygen content in the flue gas, control the combustion and the furnace temperature, thereby improving the combustion efficiency and ensuring the use effect of the air preheater body.

[0030] It should be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient plugging removal device for an air preheater, comprising a main body mechanism (1) as the main body of the device. The main body mechanism (1) includes a protective housing (101) and an air preheater body located inside the protective housing (101), and is characterized in that: A clog-removing mechanism (2) for cleaning the blockage at the bottom of the air preheater body is arranged inside the main body mechanism (1); The clog-removing mechanism (2) includes a steam communication pipe (201). The top end of the steam communication pipe (201) is fixedly connected with a row of pipes (202). The top of the row of pipes (202) is fixedly communicated with a plurality of branch pipes (203). Spray nozzles (204) are installed at the tops of the plurality of branch pipes (203). A plurality of acoustic wave generators (205) are installed at the bottom of the air preheater body. Through holes (206) are formed on both sides of the protective housing (101). Clamping blocks (207) are clamped in the two through holes (206). A connecting block (208) is fixedly connected to the opposite sides of the two clamping blocks (207). Wire brush plates (209) are installed on both sides of the two connecting blocks (208). Semi-circular rings (210) are fixedly connected to the opposite sides of the two connecting blocks (208). A magnetic block a (211) and a magnetic block b (212) are respectively installed on the opposite sides of the two semi-circular rings (210). Fixing components (213) are arranged on the two connecting blocks (208).

2. The high-efficiency plugging removal device for air preheater according to claim 1, wherein: The fixing components (213) include sliding grooves (2131) formed on both sides of the two connecting blocks (208). Sliding blocks (2132) are slidably connected in the plurality of sliding grooves (2131). Through grooves (2133) are formed on both sides of the two semi-circular rings (210).

3. The high-efficiency plugging removal device for an air preheater according to claim 2, characterized in that: The plurality of sliding grooves (2131) are respectively communicated with the plurality of through grooves (2133). The plurality of sliding blocks (2132) are respectively connected with the plurality of wire brush plates (209).

4. The high-efficiency clogging removal device for an air preheater according to claim 3, wherein: A flue gas inlet (102), a primary air outlet (106) and a secondary air outlet (104) are respectively fixedly connected to the top of the protective housing (101). A flue gas outlet (103), a primary air inlet (107) and a secondary air inlet (105) are respectively fixedly connected to the bottom of the protective housing (101).

5. The high-efficiency plugging removal device for air preheater according to claim 4, wherein: One side of the steam communication pipe (201) is fixedly connected to the inner wall of the flue gas outlet (103). Sealing rings are installed at the connection gaps between the two clamping blocks (207) and the two through holes (206).

6. The high-efficiency plugging removal device for air preheater according to claim 1, wherein: Connection shells are respectively fixedly connected to the top and bottom of the protective housing (101). A connecting shaft is installed at the center of the air preheater body. A servo motor for driving the connecting shaft is installed on the connection shell.

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