Digestion mechanism for reducing differential pressure of air pre-heater

Abstract

The utility model provides a digestion mechanism for reducing the differential pressure of an air pre-heater. The digestion mechanism comprises a conveying pipe, a box body is arranged at one end of the conveying pipe, a filtering piece is arranged in the box body, one side of the filtering piece is connected with a telescopic rod, and the surface of the telescopic rod is connected with a telescopic sleeve in a sliding mode. According to the digestion mechanism for reducing the differential pressure of the air pre-heater, dust contained in air entering the box body is filtered through the filtering piece, so that the dust is prevented from entering other equipment through the pipeline and damaging the other equipment, and meanwhile, after the air enters the box body through the conveying pipe, the dust is prevented from entering the box body through the conveying pipe. The extension sleeve is blown to drive an extension plate to be connected with a scraper to move towards one side, dust on the surface of the filter part is scraped, meanwhile, a plurality of rotating rings are matched with a plurality of vibration blocks, vibration holes and sliding rods, the filter part is vibrated, the cleaning effect is improved, and therefore the filter part is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the field of air preheaters, in particular to a digestion mechanism for reducing the differential pressure of an air preheater. Background Art

[0002] At present, large boilers in the domestic thermal power industry are basically equipped with two three-compartment rotary air preheaters. The main axis of the air preheater is arranged vertically, and the flue gas and air exchange heat in a countercurrent manner. In accordance with environmental protection specifications, the air preheaters are designed as denitrification air preheaters. The rotor adopts a modular compartment structure and uses smaller heat storage components. They are disassembled and assembled from the top for maintenance and replacement. The cold end elements of the air preheater adopt corrosion-resistant enamel plate heat storage elements, and the hot end elements adopt Corten steel. However, as the unit runs, the differential pressure of the air preheater will continue to increase. Although measures such as increasing the average temperature of the cold end of the air preheater and increasing the frequency of soot blowing at the cold end are taken, the effect will not be too great and will exceed the design value by a lot.

[0003] Now the preheater is clearing the tripping of the blower on this side and the induced draft fan on the opposite side is running to protect the induced draft fan on this side. The stable load is between 50%-75%, and the boiler combustion condition is stable. Gradually close the contact damper of the blower outlet of one furnace to fully close, cancel the automatic blower of one unit, manually reduce the blower output, gradually close the water inlet regulating door on the left side of the low-temperature economizer, reduce the blower output while increasing the blower output on the other side, keep the cold end of the air preheater soot blowing continuously, and slowly close the hot secondary air damper at the outlet of the air preheater on the spot. Continue to increase the exhaust gas temperature at the air preheater outlet to above 150℃. During this operation, when closing the hot secondary air damper at the air preheater outlet, pay attention to reducing the output of the blower, controlling the blower outlet wind pressure ≯3Kpa, and the outlet air volume not less than 200t / h, so as to effectively prevent the thermal power unit from clogging the air preheater due to the accumulation and adhesion of denitrification product NH4HSO4. When the preheater is transported out through the pipeline through the output end, it will enter the subsequent equipment, causing damage to the subsequent equipment.

[0004] Therefore, it is necessary to provide a digestion mechanism for reducing the air preheater differential pressure to solve the above technical problems. Utility Model Content

[0005] The utility model provides a digestion mechanism for reducing the differential pressure of an air preheater, which solves the problem that the air of the preheater enters into subsequent equipment when being transported out through a pipeline through an output end, thereby causing damage to the subsequent equipment.

[0006] In order to solve the above technical problems, the utility model provides a digestion mechanism for reducing the differential pressure of an air preheater, comprising:

[0007] A delivery pipe, one end of which is provided with a box, a filter is provided inside the box, a telescopic rod is connected to one side of the filter, a telescopic sleeve is slidably connected to the surface of the telescopic rod, a rotating rod is provided inside the box, a plurality of extension sleeves are fixedly connected to the surface of the rotating rod, an extension plate is slidably connected to the interior of the plurality of extension sleeves, and a scraper is fixedly connected to one end of the plurality of extension plates;

[0008] A reset groove is provided inside the extension plate, a reset rod is slidably connected inside the reset groove, and a reset spring is sleeved on the surface of the reset rod;

[0009] A sliding sleeve is fixedly connected inside the box body, a sliding rod is slidably connected inside the sliding sleeve, a vibration hole is opened inside the sliding rod, a vibration block is arranged inside the vibration hole, and one end of the vibration block is fixedly connected to a rotating ring.

[0010] Preferably, a baffle is provided on one side of the box body, and a movable plate is fixedly connected to one side of the baffle.

[0011] Preferably, a water tank is fixedly connected to the bottom of the box body, and an input pipe is fixedly connected to the interior of the water tank.

[0012] Preferably, a water pump is provided at one end of the input pipe, and an output pipe is fixedly installed at the output end of the water pump.

[0013] Preferably, a shunt pipe is provided at one end of the output pipe, and a plurality of nozzles are provided on the surface of the shunt pipe.

[0014] Preferably, a fixing groove is provided inside the baffle, and a fixing frame is provided inside the fixing groove.

[0015] Preferably, a fixing piece is disposed inside the fixing frame, and a concave handle is provided inside the fixing piece.

[0016] Compared with the related art, the decomposition mechanism for reducing the air preheater differential pressure provided by the utility model has the following beneficial effects:

[0017] The utility model provides a decontamination mechanism for reducing the differential pressure of an air preheater, and filters the dust contained in the wind entering the interior of a box body through a filter element, thereby preventing the dust from entering the interior of other equipment through a pipeline and causing damage to the other equipment. At the same time, after the wind enters the interior of the box body through a conveying pipe, the extension sleeve is blown to drive the extension plate connected to the scraper to move to one side, and the dust on the surface of the filter element is scraped off. At the same time, a plurality of rotating rings are matched with a plurality of vibration blocks, vibration holes and sliding rods to vibrate the filter element, thereby increasing the cleaning effect and preventing the filter element from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural schematic diagram of a first embodiment of an online digestion method for reducing air preheater differential pressure provided by the present invention;

[0019] Figure 2 for Figure 1 The schematic diagram of the cross-section structure of the entire box body shown;

[0020] Figure 3 for Figure 1 The structural schematic diagram of the filter element shown;

[0021] Figure 4 for Figure 2 An enlarged schematic diagram of part A is shown;

[0022] Figure 5 for Figure 3 An enlarged schematic diagram of part B is shown;

[0023] Figure 6 for Figure 3 An enlarged schematic diagram of part C is shown;

[0024] Figure 7 A schematic structural diagram of a second embodiment of an online digestion method for reducing air preheater differential pressure provided by the present invention;

[0025] Figure 8 for Figure 7 A schematic diagram of the structure of the fixing frame shown;

[0026] Fig. 9 for Figure 8 An enlarged schematic diagram of part D is shown.

[0027] Numbers in the figure: 1, box body, 2, delivery pipe, 3, filter element, 31, telescopic rod, 32, telescopic sleeve, 4, rotating rod, 41, extension sleeve, 42, extension plate, 43, scraper, 5, reset groove, 51, reset rod, 53, reset spring, 6, sliding sleeve, 61, sliding rod, 61, vibration hole, 62, vibration block, 63, rotating ring, 7, baffle, 8, moving plate, 9, water tank, 91, input pipe, 92, water pump, 93, output pipe, 94, diverter pipe, 95, nozzle, 10, fixing groove, 11, fixing frame, 12, fixing part, 13, concave handle. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0029] First embodiment

[0030] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 ,in, Figure 1 A structural schematic diagram of a first embodiment of an online digestion method for reducing air preheater differential pressure provided by the present invention; Figure 2 for Figure 1 The schematic diagram of the cross-section structure of the entire box body shown; Figure 3 for Figure 1 The structural schematic diagram of the filter element shown; Figure 4 for Figure 2 An enlarged schematic diagram of part A is shown; Figure 5 for Figure 3 An enlarged schematic diagram of part B is shown; Figure 6 for Figure 3 A digestion mechanism for reducing the differential pressure of an air preheater includes:

[0031] A delivery pipe 2, one end of which is provided with a box body 1, a filter element 3 is provided inside the box body 1, a telescopic rod 31 is connected to one side of the filter element 3, a telescopic sleeve 32 is slidably connected to the surface of the telescopic rod 31, a rotating rod 4 is provided inside the box body 1, a plurality of extension sleeves 41 are fixedly connected to the surface of the rotating rod 4, an extension plate 42 is slidably connected to the interior of the plurality of extension sleeves 41, and a scraper 43 is fixedly connected to one end of the plurality of extension plates 42;

[0032] A reset groove 5 is formed inside the extension plate 42, a reset rod 51 is slidably connected inside the reset groove 5, and a reset spring 53 is sleeved on the surface of the reset rod 51;

[0033] A sliding sleeve 6 is fixedly connected to the interior of the box body 1, a sliding rod 61 is slidably connected to the interior of the sliding sleeve 6, a vibration hole 61 is opened inside the sliding rod 61, a vibration block 62 is arranged inside the vibration hole 61, and one end of the vibration block 62 is fixedly connected to a rotating ring 63.

[0034] A baffle plate 7 is disposed on one side of the box body 1 , and a movable plate 8 is fixedly connected to one side of the baffle plate 7 .

[0035] A water tank 9 is fixedly connected to the bottom of the box body 1 , and an input pipe 91 is fixedly connected to the interior of the water tank 9 .

[0036] A water pump 92 is disposed at one end of the input pipe 91 , and an output pipe 93 is fixedly mounted at the output end of the water pump 92 .

[0037] A shunt pipe 94 is disposed at one end of the output pipe 93 , and a plurality of nozzles 95 are disposed on the surface of the shunt pipe 94 .

[0038] Delivery pipes 2 are fixedly installed on both sides of the box body 1, and the delivery pipe 2 on one side of the box body 1 is connected to the output end of the air preheater.

[0039] The filter element 3 may be a filter net, which is used to filter dust contained in the wind entering into the box body 1 .

[0040] Two telescopic sleeves 32 are fixedly connected to both sides of the inner wall of the box body 1 , and telescopic rods 31 are slidably connected inside the four telescopic sleeves 32 . One end of the four telescopic rods 31 is fixedly connected to one side of the filter element 3 .

[0041] Both ends of the filter element 3 are connected to one side of the housing 1 through rubber pads, thereby preventing dust from being discharged from the gap between the housing 1 and the filter element 3 .

[0042] Two ends of the rotating rod 4 are rotatably connected to two sides of the inner wall of the box body 1 through a rotating shaft.

[0043] The interiors of the four telescopic sleeves 41 are all fixedly connected with reset rods 51 , the interiors of the four reset rods 51 are all sleeved with reset springs 53 , and the interiors of the four telescopic rods 41 are all provided with reset grooves 5 .

[0044] Both ends of the inner walls of the two extension sleeves 41 are fixedly connected with reset rods 51 , and reset springs 53 are sleeved inside the four reset rods 51 . Two reset grooves 5 are provided inside the two extension plates 42 .

[0045] Two rotating rings 63 are fixedly connected to the surface of the rotating rod 4 , and a plurality of vibration blocks 62 are fixedly connected to the surfaces of the two rotating rings 63 . The plurality of vibration blocks 62 are all semicircular blocks.

[0046] Sliding sleeves 6 are fixedly connected to both sides of the inner wall of the box body 1 , and sliding rods 61 are slidably connected inside the two sliding sleeves 6 . Vibration holes 61 matching with the vibration blocks 61 are opened inside the two sliding rods 61 .

[0047] The baffle 7 is fixedly installed on one side of the box body 1 by bolts. Two connecting rods are fixedly connected to one side of the baffle 7. One end of the two connecting rods is fixedly connected to one side of the movable plate 8, which is used to drive the movable plate 8 to move to one side when the baffle 7 moves to one side, thereby scraping out the dust at the bottom of the box body 1.

[0048] A filter is fixedly installed at the bottom of the box body 1, which is used to filter the water inside the box body 1 and then enter the water tank 9 for reuse.

[0049] The water pump 92 is fixedly installed on one side of the water tank 9 , one end of the input pipe 91 is fixedly installed on the input end of the water pump, and the other end is fixedly installed inside the water tank 9 .

[0050] Two shunt pipes 94 are fixedly installed inside the box 1. One end of the output pipe 93 is connected to one end of the two shunt pipes 94 through a three-way pipe. A plurality of nozzles 95 are arranged on the surface of the two shunt pipes 94, and the plurality of nozzles 95 are all atomizing nozzles.

[0051] After the water pump 92 is started, the input pipe 91 draws the water out of the water tank 9 and transports it into the water pump 92. After being transported into the diversion pipe 94 through the output pipe 93 connected to the output end of the water pump 92, the water is sprayed out through multiple nozzles 95 to reduce the dust contained in the wind entering the box body 1, thereby increasing the dust removal effect.

[0052] The working principle of a decontamination mechanism for reducing the air preheater differential pressure provided by the utility model is as follows:

[0053] When in use, after the dust-containing wind enters the interior of the box body 1 through the conveying pipe 2 at one end inside the air preheater, the extension sleeve 41 is blown to rotate to one side, thereby driving the rotating rod 4 to rotate to one side, and the dust-containing wind blown into the interior of the box body 1 is filtered through the filter element 3.

[0054] When the rotating rod 4 rotates to one side, it drives the two rotating rings 63 to rotate to one side. When the two rotating rings 63 rotate to one side, they drive the multiple vibration blocks 62 to rotate to one side. When the vibration block 62 moves to one side inside the vibration hole 61, it pushes the sliding rod 61 to move to one side inside the sliding sleeve 6. When the sliding rod 61 moves to one side, it drives the filter element 3 to move to one side, thereby driving the two telescopic rods 31 to move to one side inside the two telescopic sleeves 32 respectively, while squeezing the return spring 53. At the same time, the return spring 53 inside the extension sleeve 41 pushes the extension plate 42 to move to one side, so that the scraper 43 scrapes off the dust filtered from the surface of the filter element 3, thereby preventing the filter element 3 from being blocked.

[0055] When the next vibration block 62 enters the vibration hole 61, the reset spring 53 inside the telescopic sleeve 32 pushes the two telescopic rods 31 to move to one side to reset, and at the same time, the extension plate 42 moves to one side inside the extension sleeve 41 and squeezes the reset spring 53 inside the extension sleeve 41, so that the filter element 3 vibrates to a certain extent, thereby increasing the cleaning effect of the scraper 43 on the filter element 3.

[0056] The dust is filtered by the filter element 3, thereby preventing the dust from entering into the interior of the subsequent equipment through the conveying pipe 2 and causing damage or blockage to the subsequent equipment.

[0057] Compared with the related art, the decomposition mechanism for reducing the air preheater differential pressure provided by the utility model has the following beneficial effects:

[0058] The utility model provides a decontamination mechanism for reducing the differential pressure of an air preheater, and filters the dust contained in the wind entering the interior of the box body 1 through the filter element 3, thereby preventing the dust from entering the interior of other equipment through the pipeline and causing damage to other equipment. At the same time, after the wind enters the interior of the box body 1 through the conveying pipe 2, the extension sleeve 41 is blown to drive the extension plate 42 connected to the scraper 43 to move to one side, and the dust on the surface of the filter element 3 is scraped off. At the same time, a plurality of rotating rings 63 cooperate with a plurality of vibration blocks 62, vibration holes 61 and sliding rods 61 to vibrate the filter element 3, thereby increasing the cleaning effect and preventing the filter element 3 from being blocked.

[0059] Second embodiment

[0060] Please refer to Figure 7 , Figure 8 and Fig. 9 Based on the first embodiment of the present application, a decontamination mechanism for reducing the air preheater differential pressure is provided. The second embodiment of the present application proposes another decontamination mechanism for reducing the air preheater differential pressure. The second embodiment is only a preferred method of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0061] Specifically, the difference of the second embodiment of the present application in providing a digestion mechanism for reducing the differential pressure of an air preheater is that, in a digestion mechanism for reducing the differential pressure of an air preheater, a fixing groove 10 is provided inside the baffle 7, and a fixing frame 11 is provided inside the fixing groove 10.

[0062] Two fixing grooves 10 are provided inside the baffle 7 and the box body 1. The fixing frame 11 is a U-shaped frame, and the two ends of the fixing frame 11 are respectively slidably connected to the inside of the two fixing grooves 10, so as to limit the position between the baffle 7 and the box body 1 after the two ends of the fixing frame 11 are respectively inserted into the inside of the two fixing grooves 10.

[0063] A fixing member 12 is disposed inside the fixing frame 11 , and a concave handle 13 is provided inside the fixing member 11 .

[0064] The fixing member 12 includes a fixing hole, the internal thread of which is connected with a fixing pin, which is a bolt. The fixing frame 11 and the box body 1 are both provided with fixing holes adapted to the fixing pin, which are used to fix the fixing frame 11 after the fixing pin is installed inside the fixing hole.

[0065] The working principle of a decontamination mechanism for reducing the air preheater differential pressure provided by the utility model is as follows:

[0066] When in use, after removing the fixing piece 12 , the fixing frame 11 is pulled upwards, so that the baffle 7 can be removed after being moved upwards and separated inside the two fixing grooves 10 .

[0067] Compared with the related art, the decomposition mechanism for reducing the air preheater differential pressure provided by the utility model has the following beneficial effects:

[0068] The present invention provides an online digestion method for reducing the differential pressure of an air preheater. After the fixing part 12 is removed, the fixing frame 11 is moved upward and taken out, and then the baffle 7 can be removed, thereby facilitating the removal of the baffle 7.

[0069] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A digestion mechanism for reducing the differential pressure of an air preheater, characterized in that: include: A delivery pipe, one end of which is provided with a box, a filter is provided inside the box, a telescopic rod is connected to one side of the filter, a telescopic sleeve is slidably connected to the surface of the telescopic rod, a rotating rod is provided inside the box, a plurality of extension sleeves are fixedly connected to the surface of the rotating rod, an extension plate is slidably connected to the interior of the plurality of extension sleeves, and a scraper is fixedly connected to one end of the plurality of extension plates; A reset groove is provided inside the extension plate, a reset rod is slidably connected inside the reset groove, and a reset spring is sleeved on the surface of the reset rod; A sliding sleeve is fixedly connected inside the box body, a sliding rod is slidably connected inside the sliding sleeve, a vibration hole is opened inside the sliding rod, a vibration block is arranged inside the vibration hole, and one end of the vibration block is fixedly connected to a rotating ring.

2. A digestion mechanism for reducing air preheater differential pressure according to claim 1, characterized in that: A baffle is provided on one side of the box body, and a movable plate is fixedly connected to one side of the baffle.

3. A digestion mechanism for reducing air preheater differential pressure according to claim 2, characterized in that: The bottom of the box body is fixedly connected with a water tank, and the interior of the water tank is fixedly connected with an input pipe.

4. A digestion mechanism for reducing air preheater differential pressure according to claim 3, characterized in that: A water pump is arranged at one end of the input pipe, and an output pipe is fixedly installed at the output end of the water pump.

5. A digestion mechanism for reducing air preheater differential pressure according to claim 4, characterized in that: A shunt pipe is arranged at one end of the output pipe, and a plurality of nozzles are arranged on the surface of the shunt pipe.

6. A digestion mechanism for reducing air preheater differential pressure according to claim 2, characterized in that: A fixing groove is provided inside the baffle, and a fixing frame is provided inside the fixing groove.

7. A digestion mechanism for reducing air preheater differential pressure according to claim 6, characterized in that: A fixing piece is arranged inside the fixing frame, and a concave handle is provided inside the fixing piece.

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