Flue gas guiding device of boiler economizer

Abstract

The utility model relates to the technical field of coal economizers, and discloses a flue gas guiding device of a boiler coal economizer, a telescopic spring is fixedly connected between two baffles, and a pushing assembly is arranged in a gas inlet shell and located between a flow guiding plate and a fixing shaft; the rotating disc is rotated to drive the worm between the two fixed blocks to rotate, so that the worm drives the three worm wheels to rotate, the worm wheels drive the screw rod to rotate in the air inlet shell at the moment, the screw rod drives the two ejector blocks to move in the opposite directions, the ejector blocks abut against the inclined faces of the movable blocks, and the movable blocks move in the air inlet shell. Moving blocks move on the upper side and the lower side of the interior of the air inlet shell, so that lantern rings on two baffles are pushed to rotate with a fixed shaft as the circle center, the two baffles shield two flow guide air channels of one flow guide pipe, and adjustment of inlets of the flow guide air channels is completed; and precipitation and accumulation of high-temperature flue gas in the economizer shell due to too low flow speed are prevented, the heat exchange efficiency is improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coal economizer technical field, concretely is a boiler coal economizer flue gas flow guide device. BACKGROUND

[0002] The coal economizer is installed to the low part of the boiler tail flue for recovering the waste heat of the exhaust fume, and the coal economizer is the heating surface that the boiler feed water is heated into the saturated water under the pressure of the steam pocket, because it absorbs the heat of high-temperature flue gas, reduces the exhaust fume temperature of flue gas, saves energy, improves the efficiency, so it is called the coal economizer. The low-temperature coal economizer absorbs the heat in high-temperature flue gas through circulating water, reaches the purpose of absorbing waste heat.

[0003] Because the boiler load must adapt to wide load regulation at present, the flue gas flow variation range is big, when the flue gas flow is small, the dust in the flue gas will deposit in the bottom of the low-temperature coal economizer, the bottom heat exchange pipe is covered by the smoke dust, not only blocks the flue gas flow, but also increases the flue gas resistance, and the heat exchange pipe is easy to stick dust, leads to corrosion, blockage, and then makes the heat exchange pipe invalid, influences its service life, for this, a boiler coal economizer flue gas flow guide device is provided. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a boiler coal economizer flue gas flow guide device to solve the problems in the above background.

[0005] To realize the above-mentioned purpose, the utility model provides the following technical scheme: a boiler coal economizer flue gas flow guide device, comprising

[0006] The coal economizer shell is provided with the flow guide assembly, one end of the coal economizer shell is provided with the air inlet shell, and the other end of the coal economizer shell is provided with the air outlet shell.

[0007] The flow guide assembly is arranged in the inside of the air inlet shell.

[0008] The flow guide assembly comprises a plurality of flow guide plates, a fixed shaft, two sleeve rings and two baffles, the plurality of flow guide plates are installed in the inside of the air inlet shell, the fixed shaft is rotatably connected to the inside of the air inlet shell, the two sleeve rings are movably sleeved on the outside of the fixed shaft, the two baffles are fixedly connected to the outside of the two sleeve rings respectively, the two baffles are fixedly connected with the expansion spring, and the inside of the air inlet shell is provided with the pushing assembly between the flow guide plate and the fixed shaft.

[0009] As preferred, the pushing assembly comprises a screw rod, two top blocks and two moving blocks, one end of the two top blocks is slidably connected to the outer side of the guide plate, one side of the two moving blocks is slidably connected to the upper and lower sides of the inner side of the air inlet shell and is opposite to the other side of the two top blocks, and the other end of the two top blocks is sleeved on the outer side of the screw rod.

[0010] As preferred, the outer side of the screw rod is provided with thread segments opposite to each other, and the other end of the two top blocks is threadedly connected to the outer side of the screw rod.

[0011] As preferred, one end of the screw rod extends to the top of the air inlet shell and is fixedly connected with a worm wheel, the top of the air inlet shell is provided with two fixed blocks, a worm is rotatably connected between the two fixed blocks, the worm is meshingly connected to the outer side of the worm wheel, and one end of the worm is fixedly connected with a rotating disc outside one of the fixed blocks.

[0012] As preferred, the opposite side of the moving block is provided with a slope, and one end of the top block abuts against the slope.

[0013] As preferred, the inner side of the economizer shell is provided with a plurality of flow guide pipes, one end of the plurality of flow guide pipes is provided with a liquid inlet, and the other end of the plurality of flow guide pipes is provided with a liquid outlet.

[0014] As preferred, the outer side of the plurality of flow guide pipes is fixedly sleeved with a spiral blade in the inner side of the economizer shell.

[0015] Compared with the prior art, the above technical scheme has the following technical effects: the rotating disc drives the worm to rotate between the two fixed blocks, the worm drives the three worm wheels to rotate, the worm wheels drive the screw rod to rotate in the inner side of the air inlet shell, the screw rod drives the two top blocks to move in opposite directions, the top blocks abut against the slope of the moving block, the moving block moves on the upper and lower sides of the inner side of the air inlet shell, the sleeve ring on the two baffles rotates around the fixed shaft, the two baffles shield the two flow guide channels of one flow guide pipe, the adjustment of the flow guide channel inlet is completed, the high-temperature flue gas is prevented from being deposited and accumulated in the economizer shell due to too low flow rate, the heat exchange efficiency is improved, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and all other drawings obtained by those skilled in the art without any creative effort based on these drawings also belong to the scope of the present application.

[0017] Figure 1 The structure schematic diagram of the present application;

[0018] Figure 2 The top structure schematic diagram of the present application;

[0019] Figure 3 The internal structure schematic diagram of the economizer shell of the present application;

[0020] Figure 4 The guide plate structure schematic diagram of the present application;

[0021] Figure 5 The partial section structure schematic diagram of the air inlet shell of the present application.

[0022] The reference signs are as follows: 1, economizer shell; 2, flow guide pipe; 3, liquid inlet; 4, liquid outlet; 5, spiral blade; 6, air inlet shell; 7, air outlet shell; 8, guide plate; 9, fixed shaft; 10, collar; 11, baffle; 12, extension spring; 13, screw rod; 14, top block; 15, moving block; 16, worm wheel; 17, fixed block; 18, worm; 19, rotating disc. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments only represent some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of the present application.

[0024] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the disclosed content of the present application for understanding and reading by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, and therefore do not have technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0025] EMBODIMENT

[0026] Please refer to Figures 1-5The utility model provides a kind of technical scheme: a boiler economizer flue gas flow guide device, including economizer shell 1, flow guide assembly is provided on economizer shell 1, one end of economizer shell 1 is provided with air inlet shell 6, the other end of economizer shell 1 is provided with air outlet shell 7;Flow guide assembly, flow guide assembly is set to the inside of air inlet shell 6.

[0027] By setting flow guide assembly, high-temperature flue gas can be evenly discharged into the inside of economizer shell 1;Flow guide assembly includes several flow guide plates 8, fixed shaft 9, two number of sleeve rings 10 and two number of baffles 11, several flow guide plates 8 are installed in the inside of air inlet shell 6, furnace high-temperature flue gas is discharged into the inside of air inlet shell 6, through multiple flow guide plates 8, high-temperature flue gas can be evenly discharged into the inside of economizer shell 1, so that multiple flow guide pipes 2 can be evenly heated and the uniformity of fly ash concentration, reduce the wear and tear of fly ash to flow guide pipe 2;Fixed shaft 9 is rotatably connected to the inside of air inlet shell 6, two sleeve rings 10 are movably sleeved on the outside of fixed shaft 9, two baffles 11 are respectively fixedly connected to the outside of two sleeve rings 10, two baffles 11 are fixedly connected with telescopic spring 12 between them, the inside of air inlet shell 6 is provided with pusher assembly between flow guide plate 8 and fixed shaft 9;Through the sleeve ring 10 on two baffles 11, fixed shaft 9 is as center of rotation, so that two baffles 11 shield two flow guide ducts of one flow guide pipe 2, can adjust the inlet of flow guide duct.

[0028] By setting the push assembly, the flow rate inside the economizer shell 1 can be adjusted, preventing high-temperature flue gas from causing sediment accumulation inside the economizer shell 1 due to excessively low flow rate, improving heat exchange efficiency, and prolonging service life; the push assembly includes a lead screw 13, two top blocks 14, and two moving blocks 15, the lead screw 13 is rotatably connected to the inside of the intake shell 6, one end of each of the two top blocks 14 is slidably connected to the outside of the flow guide plate 8, one side of each of the two moving blocks 15 is slidably connected to the inside of the intake shell 6 on the upper and lower sides and opposite the other side of the two top blocks 14, the other end of each of the two top blocks 14 is sleeved to the outside of the lead screw 13, the outside of the lead screw 13 is provided with thread segments opposite each other, the other end of each of the two top blocks 14 is threadedly connected to the outside of the lead screw 13, one end of the lead screw 13 extends to the top of the intake shell 6 and is fixedly connected with a worm gear 16, the top of the intake shell 6 is provided with two fixed blocks 17, the two fixed blocks 17 are rotatably connected with a worm shaft 18 therebetween, the worm shaft 18 is meshingly connected to the outside of the worm gear 16, one end of the worm shaft 18 extends to the outside of one of the fixed blocks 17 and is fixedly connected with a rotating disc 19, the opposite side of each of the moving blocks 15 is provided with an inclined surface, and one end of each of the top blocks 14 abuts against the inclined surface; rotating the rotating disc 19 drives the worm shaft 18 between the two fixed blocks 17 to rotate, so that the worm shaft 18 drives the three worm gears 16 to rotate, at this time the worm gears 16 drive the lead screw 13 to rotate inside the intake shell 6, the lead screw 13 drives the two top blocks 14 to move in opposite directions, the top blocks 14 abut against the inclined surfaces of the moving blocks 15, so that the moving blocks 15 move on the upper and lower sides inside the intake shell 6, thereby driving the collar 10 on the two baffles 11 to rotate with the fixed shaft 9 as the center, so that the two baffles 11 shield the two flow guide air passages of one flow guide pipe 2, completing the adjustment of the inlet of the flow guide air passage.

[0029] When the top blocks 14 abut against the inclined surfaces of the moving blocks 15, the moving blocks 15 move on the upper and lower sides inside the intake shell 6, at this time the extension springs 12 are stretched under stress, when the top blocks 14 are disengaged from the moving blocks 15, the extension springs 12 pull the collar 10 on the two baffles 11 to rotate with the fixed shaft 9 as the center, thereby driving the moving blocks 15 to reset.

[0030] The inside of the economizer shell 1 is provided with a plurality of flow guide pipes 2, one end of each of the plurality of flow guide pipes 2 is provided with a liquid inlet 3, the other end of each of the plurality of flow guide pipes 2 is provided with a liquid outlet 4, and the outside of each of the plurality of flow guide pipes 2 is fixedly sleeved with a helical blade 5 inside the economizer shell 1; the furnace discharges high-temperature flue gas into the inside of the intake shell 6, which can be uniformly discharged into the inside of the economizer shell 1 through the plurality of flow guide plates 8, the flue gas passes through the flow guide pipes 2 and is then discharged through the gas outlet shell 7, the liquid enters the inside of the flow guide pipes 2 through the liquid inlets 3 and is then discharged through the liquid outlets 4, thereby completing the recovery of flue gas waste heat.

[0031] The working principle or structural principle is that when in use, the boiler discharges high-temperature flue gas into the inside of the air inlet shell 6, the high-temperature flue gas can be uniformly discharged into the inside of the economizer shell 1 through the plurality of guide plates 8, the plurality of guide pipes 2 can be uniformly heated, the uniformity of the fly ash concentration is reduced, the abrasion of the fly ash on the guide pipes 2 is reduced, the flue gas passes through the guide pipes 2 and is discharged through the air outlet shell 7, the liquid enters the inside of the guide pipes 2 through the liquid inlet 3 and is discharged through the liquid outlet 4, and the recovery of the flue gas waste heat can be completed.

[0032] When it is necessary to adjust the high-temperature flue gas flow rate of the air inlet of the air inlet shell 6, the worm 18 between the two fixed blocks 17 is driven to rotate by rotating the rotating disc 19, the three worm gears 16 are driven to rotate by the worm 18, the screw rod 13 is driven to rotate in the inside of the air inlet shell 6 by the worm gears 16, the two top blocks 14 are driven to move in opposite directions by the screw rod 13, the top block 14 abuts against the inclined surface of the moving block 15, the moving block 15 moves on the upper and lower sides in the inside of the air inlet shell 6, the moving block 15 abuts against one side of the two baffles 11, the collar 10 on the two baffles 11 is driven to rotate with the fixed shaft 9 as the center, the telescopic spring 12 is stretched under the action of force, the two baffles 11 shield the two guide air passages of one guide pipe 2, the inlet of the guide air passage is adjusted, the high-temperature flue gas flow rate is adjusted, and the high-temperature flue gas is prevented from being deposited and accumulated in the inside of the economizer shell 1 due to the excessively low flow rate.

[0033] Those skilled in the art can understand that the features recorded in various embodiments and / or claims of the present application can be combined or / and combined, even if such combinations or combinations are not explicitly recorded in the present application. In particular, the features recorded in various embodiments and / or claims of the present application can be combined and / or combined without departing from the spirit and teachings of the present application. All these combinations and / or combinations fall within the scope of the present application.

Claims

1. A boiler economizer flue gas flow guiding device, characterized by: The utility model relates to a coal economizer shell, the coal economizer shell is provided with a flow guide assembly, one end of the coal economizer shell is provided with an air inlet shell, the other end of the coal economizer shell is provided with an air outlet shell, the flow guide assembly is arranged in the air inlet shell, the flow guide assembly includes a plurality of flow guide plates, a fixed shaft, two sleeve rings and two baffles, the plurality of flow guide plates are installed in the air inlet shell, the fixed shaft is rotatably connected in the air inlet shell, the two sleeve rings are movably sleeved on the outer side of the fixed shaft, the two baffles are fixedly connected to the outer side of the two sleeve rings, the telescopic spring is fixedly connected between the two baffles, the air inlet shell is provided with a push assembly between the flow guide plate and the fixed shaft. The push assembly includes a lead screw, two top blocks and two moving blocks, the lead screw is rotatably connected in the air inlet shell, one end of the two top blocks is slidably connected to the outer side of the flow guide plate, one side of the two moving blocks is slidably connected to the upper and lower sides of the air inlet shell and is opposite to the other side of the two top blocks, the other end of the two top blocks is sleeved on the outer side of the lead screw. The outer side of the lead screw is provided with thread segments opposite to each other, the other end of the two top blocks is connected to the outer side of the lead screw through threads. One end of the lead screw extends to the top of the air inlet shell and is fixedly connected with a worm wheel, the top of the air inlet shell is provided with two fixed blocks, the worm gear is rotatably connected between the two fixed blocks, the worm gear is meshingly connected to the outer side of the worm wheel, one end of the worm gear extends to the outer side of one of the fixed blocks and is fixedly connected with a rotating disc.

2. The flue gas flow guiding device for a boiler economizer according to claim 1, characterized in that: The opposite side of the moving block is provided with a slope, and one end of the top block abuts against the slope.

3. The flue gas flow guiding device for a boiler economizer according to claim 2, characterized in that: The inside of the coal economizer shell is provided with a plurality of flow guide pipes, one end of the plurality of flow guide pipes is provided with a liquid inlet, the other end of the plurality of flow guide pipes is provided with a liquid outlet.

4. The flue gas flow guiding device for a boiler economizer according to claim 2, characterized in that: The outer side of the plurality of flow guide pipes is fixedly sleeved with a helical blade in the inside of the coal economizer shell.

5. The flue gas flow guiding device for a boiler economizer according to claim 2, characterized in that: ​ 6. The flue gas flow guiding device for a boiler economizer according to claim 1, characterized in that: ​ 7. The flue gas flow guiding device for a boiler economizer according to claim 6, characterized in that: ​

Images