Flue with fence type ash blocking device and flow equalizing device
By designing a fence-type ash barrier device and a flow-sharing device in the waste heat boiler flue, the problems of high dust content and large fluctuations in the flue of the flue gas are solved, the protection of the heated surface pipe and the stable distribution of the flue gas flow field are achieved, and the operation safety and stability of the boiler are improved.
Patent Information
- Application Number
- CN202421476459.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The existing waste heat boilers have high dust content, which leads to wear and dust coverage of the heated surface pipe, affecting the heat transfer effect; at the same time, the flue gas flow field fluctuates greatly, resulting in uneven distribution, affecting the stability of the boiler operation.
A flue with a fence type ash retaining device and a flow-sharing device is designed. By setting a dust retaining device composed of vertical strip plates and square plates in the steering channel, dust is prevented from entering the heated surface; a flow-sharing device of cross beam structure and angle steel parts is arranged in the outlet channel to ensure uniform distribution of the flue gas flow field.
It effectively reduces wear and dust coverage of the heating surface tube, stabilizes the flue gas flow field, improves the operation safety and stability of the boiler, and ensures uniform heat absorption and water circulation stability of the heating surface.
Smart Images
Figure CN222670390U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a device with the functions of blocking ash and reasonably distributing the flue gas flow field, which is mainly suitable for the inlet flue of a waste heat boiler with a settling chamber. Background Art
[0002] At present, the waste heat boilers on the market that use flue gas containing clinker dust air for pure low-temperature waste heat power generation generally have a flue gas dust content greater than 5g / Nm3, which can easily lead to wear of the heating surface tubes and dust covering the heating surface tubes, affecting the heat transfer effect; in addition, due to the fluctuation of operating conditions during the operation of the waste heat boiler, the flue gas flow field fluctuates greatly, resulting in uneven flue gas distribution, which affects the uneven heating of the boiler heating surface and water circulation. Utility Model Content
[0003] In view of the above technical problems, the utility model provides a flue with a fence-type ash retaining device and a flow equalizing device, which has the advantages of simple structure, no ash accumulation and wear on the heating surface tubes, and easy expansion, so as to ensure the safe and stable operation of the waste heat boiler.
[0004] The technical solution adopted by the utility model is:
[0005] A flue with a fence-type ash blocking device and a flow equalizing device, comprising an inlet channel and an outlet channel, wherein the inlet channel and the outlet channel are connected through a U-shaped turning channel at the bottom, and characterized in that:
[0006] A dust blocking device is provided on one side of the turning channel close to the outlet channel, and the dust blocking device includes a plurality of vertical strip plates arranged at intervals, and both ends of each vertical strip plate extend in the horizontal longitudinal direction and are fixedly connected to the opposite side wall of the turning channel, and there is a height difference and a horizontal transverse difference between adjacent vertical strip plates, and adjacent vertical strip plates are connected by a plurality of square plates in a vertical butt-jointed manner;
[0007] A flow balancing device is arranged in the outlet channel, and the flow balancing device includes a plurality of beam structures arranged in a horizontal transverse direction and angle steel pieces arranged in a horizontal longitudinal direction, and each angle steel piece is arranged with its corner facing upward.
[0008] The flue with a fence-type ash retaining device and a flow equalizing device, wherein: the top of the turning channel is provided with a U-shaped arch, and an ash hopper is provided below, the top of the ash retaining device is fixed to the bottom side of the U-shaped arch of the turning channel by a vertical strip plate, and the bottom of the vertical strip plate of the ash retaining device is fixed to the side wall of the ash hopper by a pentagonal plate.
[0009] The flue with a fence-type ash blocking device and a flow equalizing device, wherein: a manhole device is provided on the ash hopper.
[0010] The flue with the fence-type ash blocking device and the flow equalizing device, wherein: the vertical strip plates, square plates and pentagonal plates are all made of steel.
[0011] The flue with a fence-type ash blocking device and a flow equalizing device, wherein: each of the crossbeam structures includes a pair of fixing boxes fixed on opposite side walls of the outlet channel, a plate beam is placed between the pair of fixing boxes, the plate beam is arranged vertically, one end of the plate beam is welded to the side wall of the outlet channel, and a first expansion gap is left between the other end and the side wall of the outlet channel.
[0012] The flue with the fence-type ash retaining device and the flow equalizing device, wherein: the plate beam and the fixing box are both made of steel.
[0013] The flue with a fence-type ash blocking device and a flow equalizing device, wherein: the angle steel pieces are arranged above and below the several beam structures, including movable angle steels distributed at both ends and fixed angle steels distributed in the middle, and the upper angle steel pieces and the lower angle steel pieces are arranged in a staggered manner.
[0014] The flue with a fence-type ash retaining device and a flow equalizing device, wherein: a pair of angle steel seats are fixed on the opposite side walls of the outlet channel, and the angle steel seats are composed of two angle steel sheets spaced apart from each other, and a movable angle steel is placed between a pair of angle steel seats, and both ends of the movable angle steel extend between the two angle steel sheets of the angle steel seats and leave a second expansion gap with the side walls of the outlet channel.
[0015] The flue with the fence-type ash blocking device and the flow equalizing device, wherein: both ends of the fixed angle steel are welded and fixed to the side wall of the outlet channel.
[0016] The flue with a fence-type ash blocking device and a flow equalizing device, wherein: four movable angle steels and two fixed angle steels are arranged above the several cross beam structures, and two movable angle steels and three fixed angle steels are arranged below the several cross beam structures.
[0017] The beneficial effects of the utility model are:
[0018] 1. The boiler has good ash removal effect.
[0019] 2. Reduce the wear of heating surface tubes.
[0020] 3. Reduce dust on the heated surface.
[0021] 4. The flue gas flow field is stable and the heat exchange effect of the heating surface is good.
[0022] 5. The flue gas fluctuation is small and the boiler water circulation is stable.
[0023] 6. Simple and reliable structure, low manufacturing cost.
[0024] 7. Easy to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 The utility model discloses a structural principle diagram of a flue with a fence-type ash retaining device and a flow equalizing device.
[0026] Figure 2 It is a side view of a flue with a fence-type ash blocking device and a flow equalizing device according to the utility model.
[0027] Figure 3 It is a schematic diagram of the plate beam resting on the fixing box.
[0028] Figure 4 It is an enlarged schematic diagram of the current equalizing device.
[0029] Explanation of reference numerals: inlet channel 1; turning channel 2; ash hopper 3; outlet channel 4; square plate 5; pentagonal plate 6; vertical strip plate 7; U-shaped arch 8; fixing box 9; beam structure 10; movable angle steel 11; fixed angle steel 12; plate beam 13; manhole device 14; angle steel seat 15. DETAILED DESCRIPTION
[0030] like Figure 1-Figure 4 As shown, the utility model provides a flue with a fence-type ash blocking device and a flow equalizing device, which includes an inlet channel 1 and an outlet channel 4, wherein the inlet channel 1 and the outlet channel 4 are connected by a U-shaped turning channel 2 at the bottom, and the turning channel 2 has a U-shaped arch 8 at the top and an ash hopper 3 at the bottom (the ash hopper 3 is provided with a manhole device 14), wherein:
[0031] A dust blocking device is provided on one side of the turning channel 2 close to the outlet channel 4. The dust blocking device comprises a plurality of vertical strip plates 7 arranged at intervals. The two ends of each vertical strip plate 7 are arranged along the horizontal longitudinal direction ( Figure 1 The vertical strip plates 7 extend perpendicular to the paper surface and are fixedly connected to the opposite side walls of the turning channel 2. The adjacent vertical strip plates 7 are arranged in the height direction and the horizontal direction ( Figure 1 There is a drop in both directions (left and right directions of the middle paper surface), and the adjacent vertical strip plates 7 are connected by a plurality of square plates 5 in a vertical butt-jointed manner, so that the space between the adjacent vertical strip plates 7 is divided into a plurality of grids by the square plates 5;
[0032] The top of the ash retaining device is fixed to the bottom side of the U-shaped arch 8 of the turning channel 2 by a vertical strip plate 7, and the bottom of the vertical strip plate 7 of the ash retaining device is fixed to the side wall of the ash hopper 3 by a pentagonal plate 6;
[0033] A flow balancing device is arranged in the outlet channel 4, and the flow balancing device includes two beam structures 10 arranged in a horizontal transverse direction and angle steel pieces arranged in a horizontal longitudinal direction, and each angle steel piece is arranged with its corner facing upwards;
[0034] Each of the cross beam structures 10 includes a pair of fixing boxes 9 fixed on the farther opposite side walls of the outlet channel 4, a plate beam 13 is placed between the pair of fixing boxes 9, the plate beam 13 is arranged vertically to have good bending resistance, one end of the plate beam 13 is welded to the side wall of the outlet channel 4, and a first expansion gap is left between the other end and the side wall of the outlet channel 4; the angle steel pieces are arranged above and below the two cross beam structures 10, including movable angle steels 11 at both ends and fixed angle steels 12 in the middle, and the upper angle steel pieces and the lower angle steel pieces are arranged in a staggered manner;
[0035] A pair of angle steel seats 15 are provided on the relatively opposite side walls of the outlet channel 4. The angle steel seats 15 are composed of two angle steel sheets arranged at intervals from top to bottom. A movable angle steel 11 is placed between the pair of angle steel seats 15. Both ends of the movable angle steel 11 extend between the two angle steel sheets of the angle steel seats 15 and leave a second expansion gap with the side wall of the outlet channel 4 to form a relatively free movable state (of course, it is also restricted and will not fall off); and both ends of the fixed angle steel 12 are welded and fixed to the side wall of the outlet channel 4;
[0036] In this embodiment, four movable angle steels 11 and two fixed angle steels 12 are arranged above the two cross beam structures 10 , and two movable angle steels 11 and three fixed angle steels 12 are arranged below the two cross beam structures 10 .
[0037] Among them, the components in the above structure are preferably made of steel.
[0038] When the utility model is in use, the dusty flue gas first passes through the inlet channel 1 from top to bottom and then enters the turning flue. A portion of the dust in the flue gas falls into the ash hopper 3 due to its own weight, and then passes through the fence-type smoke barrier device composed of vertical strip plates 7, square plates 5 and pentagonal plates 6. The smoke barrier device composed of such a composition can effectively prevent the flue gas dust (especially large particles of dust) from entering the rear heating surface layer; after passing through the fence-type smoke barrier device, the flue gas enters the outlet channel 4, and passes through the flow equalizing device in the outlet channel 4, thereby ensuring that the flue gas flow field is evenly and stably distributed when the flue gas leaves the outlet channel 4 and enters the heating surface, thereby ensuring uniform heat absorption of the heating surface and stable water circulation.
Claims
1. A flue with a fence-type ash blocking device and a flow equalizing device, comprising an inlet channel and an outlet channel, wherein the inlet channel and the outlet channel are connected through a U-shaped turning channel at the bottom, characterized in that: A dust blocking device is provided on one side of the turning channel close to the outlet channel, and the dust blocking device includes a plurality of vertical strip plates arranged at intervals, and both ends of each vertical strip plate extend in the horizontal longitudinal direction and are fixedly connected to the opposite side wall of the turning channel, and there is a height difference and a horizontal transverse difference between adjacent vertical strip plates, and adjacent vertical strip plates are connected by a plurality of square plates in a vertical butt-jointed manner; A flow balancing device is arranged in the outlet channel, and the flow balancing device includes a plurality of beam structures arranged in a horizontal transverse direction and angle steel pieces arranged in a horizontal longitudinal direction, and each angle steel piece is arranged with its corner facing upward.
2. The flue with a fence-type ash blocking device and a flow equalizing device according to claim 1 is characterized in that: The turning channel has a U-shaped arch above and an ash hopper below. The top of the ash retaining device is fixed to the bottom side of the U-shaped arch of the turning channel by a vertical strip plate, and the bottom of the vertical strip plate of the ash retaining device is fixed to the side wall of the ash hopper by a pentagonal plate.
3. The flue with a fence-type ash blocking device and a flow equalizing device according to claim 2 is characterized in that: A manhole device is provided on the ash hopper.
4. The flue with a fence-type ash blocking device and a flow equalizing device according to claim 2, characterized in that: The vertical strip plates, square plates and pentagonal plates are all made of steel.
5. The flue with a fence-type ash blocking device and a flow equalizing device according to claim 1, characterized in that: Each of the crossbeam structures includes a pair of fixing boxes fixed on opposite side walls of the outlet channel, a plate beam is placed between the pair of fixing boxes, the plate beam is arranged vertically, one end of the plate beam is welded to the side wall of the outlet channel, and a first expansion gap is left between the other end and the side wall of the outlet channel.
6. The flue with a fence-type ash blocking device and a flow equalizing device according to claim 5, characterized in that: The plate beam and the fixing box are both made of steel.
7. The flue with a fence-type ash blocking device and a flow equalizing device according to claim 1, characterized in that: The angle steel pieces are arranged above and below the plurality of beam structures, including movable angle steel pieces distributed at both ends and fixed angle steel pieces distributed in the middle, and the upper angle steel pieces and the lower angle steel pieces are arranged in a staggered manner.
8. The flue with a fence-type ash blocking device and a flow equalizing device according to claim 7, characterized in that: A pair of angle steel seats are fixed on opposite side walls of the outlet channel, and the angle steel seats are composed of two angle steel sheets spaced apart from each other. A movable angle steel is placed between the pair of angle steel seats, and both ends of the movable angle steel extend between the two angle steel sheets of the angle steel seats and leave a second expansion gap with the side walls of the outlet channel.
9. The flue with a fence-type ash blocking device and a flow equalizing device according to claim 7, characterized in that: Both ends of the fixed angle steel are welded and fixed to the side walls of the outlet channel.
10. The flue with a fence-type ash blocking device and a flow equalizing device according to claim 7, characterized in that: Four movable angle steels and two fixed angle steels are arranged above the plurality of cross beam structures, and two movable angle steels and three fixed angle steels are arranged below the plurality of cross beam structures.