Preheater with water collecting and draining device

Abstract

The utility model provides a preheater with a water collecting and draining device, which comprises a preheater body, the preheater body is provided with a coal gas inlet reducer pipe for coal gas to enter the preheater body from top to bottom, and the preheater further comprises the water collecting and draining device and a water collecting tank which are arranged in the coal gas inlet reducer pipe; the water collecting and draining device comprises a plurality of water collecting layers which are obliquely arranged, the relatively high ends of the water collecting layers are welded with the inner wall of the coal gas inlet reducer pipe, and the relatively low ends of the water collecting layers are communicated with the water collecting tank; the water collecting layer comprises a plurality of water collecting tanks which are arranged side by side, and the adjacent water collecting tanks are arranged at intervals; and the water collecting tank is welded in the gas inlet reducer pipe. The preheater is used for separating, collecting and collecting liquid water by arranging a plurality of water collecting layers with water collecting grooves and water collecting grooves in a coal gas inlet reducer pipe; the liquid water in the blast furnace gas is discharged by utilizing the characteristic that the density difference between the gas and the water is hundreds of times.

Description

[Technical field]

[0001] The utility model relates to the technical field of preheaters, in particular to a preheater with a water collecting and draining device. [Background technology]

[0002] In the metallurgical and electric power industries, there are many hot blast furnaces, heating furnaces, combustion furnaces, and boilers that generate a large amount of flue gas with relatively high temperature. If the flue gas is discharged directly, a large amount of heat will be wasted. In order to recover the heat in the flue gas, a preheater is generally used on site to transfer the heat in the flue gas to the air and gas required for combustion in these furnaces. After the air and gas are preheated, the temperature increases, and the combustion temperature also increases accordingly, which can save fuel and reduce production costs.

[0003] The blast furnace gas of some steel mills has a high water content, and there are many corrosive components in the water, which are extremely corrosive. This water entering the preheater not only affects the preheating temperature of the gas, but also seriously corrodes the equipment. For example, the 2205 duplex stainless steel or 254SMo super stainless steel heat exchanger plates of the steel mills with the most serious corrosion will corrode and perforate in one year, so it is necessary to remove the water in the gas as much as possible. The water seal drainer installed on the horizontal gas pipeline of the steel plant, because the gas flow rate in the pipeline is between 15-20m / s, most of the water is blown downstream by the airflow, and the drainage effect is very poor. In addition, some steel mills do not have the space, funds, and plans to transform the external pipeline network, so setting up a water collection and drainage device inside the preheater has become the only solution.

[0004] In view of this, this case conducted an in-depth study on the above issues, which led to the emergence of this case. [Utility Model Content]

[0005] The utility model aims to solve the technical problems in the prior art that the internal drainage effect of the preheater is poor and the heat exchange plate is easily corroded, and provides a preheater with a water collection and drainage device. The preheater is provided with multiple layers of water collection layers and water collection tanks with water collection tanks in the gas inlet reducer for separating, collecting and gathering liquid water; and the characteristic that the density of gas and water differs by several hundred times is utilized to discharge the liquid water in the blast furnace gas.

[0006] The utility model is implemented as follows: a preheater with a water collecting and drainage device, comprising a preheater body, a gas inlet reducer for allowing gas to enter the preheater body from top to bottom, and a water collecting and drainage device and a water collecting tank arranged in the gas inlet reducer; the water collecting and drainage device comprises a plurality of water collecting layers arranged obliquely, a relatively high end of the water collecting layer being welded to the inner wall of the gas inlet reducer, and a relatively low end being connected to the water collecting tank; the water collecting layer comprises a plurality of water collecting tanks arranged side by side, and adjacent water collecting tanks are arranged at intervals; the water collecting tank is welded in the gas inlet reducer.

[0007] Further, the water collection and drainage device includes three water collection layers, namely the upper water collection layer, the middle water collection layer, and the lower water collection layer from top to bottom; the upper water collection layer includes a plurality of upper water collection grooves arranged at equal intervals, the middle water collection layer includes a plurality of middle water collection grooves arranged at equal intervals, and the lower water collection layer includes a plurality of lower water collection grooves arranged at equal intervals.

[0008] Further, the gap between adjacent upper water collection grooves is aligned with the middle water collection grooves, and the gap between adjacent middle water collection grooves is aligned with the lower water collection grooves.

[0009] Further, the number of the middle water collection grooves is at least one more than that of the upper water collection grooves, and the number of the lower water collection grooves is at least one more than that of the middle water collection grooves.

[0010] Further, the upper water collection groove is a V-shaped upper water collection groove, the middle water collection groove is a V-shaped middle water collection groove, and the lower water collection groove is a V-shaped lower water collection groove.

[0011] Further, any one of the V-shaped upper water collection groove, V-shaped middle water collection groove, and V-shaped lower water collection groove includes a first groove plate and a second groove plate, and the first groove plate and the second groove plate are vertically connected to form a water collection groove; one end of the first groove plate away from the second groove plate is an inclined surface inclined inward, and one end of the second groove plate away from the first groove plate is an inclined surface inclined inward.

[0012] Further, the water collection and drainage device further includes an end plate, and the end plate is provided with an opening through which only the water collection groove can pass.

[0013] Further, the water collection and drainage device includes two water collection layers, namely the upper water collection layer and the lower water collection layer from top to bottom; the upper water collection layer includes a plurality of upper water collection grooves arranged at equal intervals, the lower water collection layer includes a plurality of lower water collection grooves arranged at equal intervals; the gap between adjacent upper water collection grooves is aligned with the lower water collection grooves; the number of the lower water collection grooves is at least one more than that of the upper water collection grooves.

[0014] Furthermore, the water collecting and drainage device includes four water collecting layers, which are, from top to bottom, the first water collecting layer, the second water collecting layer, the third water collecting layer, and the fourth water collecting layer; the first water collecting layer includes a plurality of first water collecting grooves arranged at equal intervals, the second water collecting layer includes a plurality of second water collecting grooves arranged at equal intervals, the third water collecting layer includes a plurality of third water collecting grooves arranged at equal intervals, and the fourth water collecting layer includes a plurality of fourth water collecting grooves arranged at equal intervals; the gap between adjacent first water collecting grooves faces the second water collecting groove, the gap between adjacent second water collecting grooves faces the third water collecting groove, and the gap between adjacent third water collecting grooves faces the fourth water collecting groove; the number of the second water collecting grooves is at least one more than the first water collecting groove, the number of the third water collecting grooves is at least one more than the second water collecting groove, and the number of the fourth water collecting grooves is at least one more than the third water collecting groove.

[0015] Furthermore, the area of ​​any one of the water-receiving layers is larger than the flow area of ​​the gas inlet reducer.

[0016] The advantages of the utility model are:

[0017] 1. The preheater of the utility model is used to separate, collect and gather liquid water by arranging multiple layers of water collecting layers and water collecting tanks in the gas inlet reducer; and the characteristic that the density of gas and water differs by several hundred times is utilized to discharge the liquid water of blast furnace gas.

[0018] 2. After the coal gas enters the gas inlet reducer, it flows to the gap between the grooves when it flows close to the upper water collecting trough. Due to the high density and inertia of the water droplets, some water droplets do not have time to turn and are collected by the current water collecting layer; the uncollected water droplets continue to flow downward with the coal gas. Since the gap below the upper water collecting layer is just facing the middle water collecting layer, the uncollected water droplets in the upper layer are just collected by the middle water collecting layer; the uncollected water droplets in the middle water collecting layer continue to flow downward and are collected by the lower water collecting layer. Since the channel of the gas inlet reducer is much larger than the pipeline, the gas flow rate gradually decreases. Reasonable arrangement of the V-shaped water collecting trough can better discharge the liquid water in the coal gas.

Brief Description of the Drawings

[0019] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0020] Figure 1 It is a structural schematic diagram of the preheater in the utility model.

[0021] Figure 2 It is a left view of the preheater in the utility model.

[0022] Figure 3 It is a top view of the preheater in the utility model.

[0023] Figure 4It is a schematic structural diagram of the water collection and drainage device and the water collection tank in the first embodiment.

[0024] Figure 5 It is a schematic diagram of the flow of water droplets and gas in the first embodiment.

[0025] Figure 6 It is a schematic structural diagram of a single water collection tank in the first embodiment.

[0026] Figure 7 It is a cross-sectional view of the multi-layer water collection layer in the first embodiment.

[0027] Figure 8 It is a schematic structural diagram of the end plate in the first embodiment.

[0028] Figure 9 It is a schematic structural diagram of the water collection and drainage device in the second embodiment.

[0029] Figure 10 It is a schematic structural diagram of the water collection and drainage device in the third embodiment.

[0030] Preheater body 1, drain pipe 11, gas inlet reducer 2, water collection and drainage device 3, water collection tank 4, water collection layer 5, upper water collection layer 51, middle water collection layer 52, lower water collection layer 53, water collection tank 6, upper water collection tank 61, middle water collection tank 62, lower water collection tank 63, first tank plate 7, second tank plate 8, end plate 9, opening 91, first water collection layer 101, second water collection layer 102, third water collection layer 103, fourth water collection layer 104.

Specific implementation manner

[0031] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0032] It should be noted here that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing these implementation manners and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0033] Embodiment 1

[0034] Please refer to Figures 1 to 8As shown, this embodiment provides a preheater with a water collecting and draining device, including a preheater body 1, on which a gas inlet reducer 2 is provided for gas to enter the preheater body 1 from top to bottom, and also includes a water collecting and draining device 3 and a water collecting tank 4 arranged in the gas inlet reducer 2; the water collecting and draining device 3 includes multiple layers of water collecting layers 5 arranged obliquely, the relatively high end of the water collecting layer 5 is welded to the inner wall of the gas inlet reducer 2, and the relatively low end is connected to the water collecting tank 4; the water collecting layer 5 includes multiple water collecting tanks 6 arranged side by side, and adjacent water collecting tanks 6 are arranged at intervals; the water collecting tank 4 is welded in the gas inlet reducer 2. Each layer of water collecting layer 5 is arranged obliquely, and the collected water and sludge can automatically flow into the water collecting tank 4 on the left, and finally flow to the water seal drainer connected to the outside of the gas inlet reducer 2 through the drainage pipe 11.

[0035] The preheater of this embodiment is used to separate, collect and gather liquid water by arranging multiple layers of water collecting layers 5 and water collecting tanks 4 with water collecting tanks 6 in the gas inlet reducer 2; and the density of gas and water differs by several hundred times to discharge the liquid water of blast furnace gas.

[0036] In this embodiment, the water collecting and drainage device 3 includes three water collecting layers 5, which are an upper water collecting layer 51, a middle water collecting layer 52, and a lower water collecting layer 53 from top to bottom; the upper water collecting layer 51 includes a plurality of upper water collecting grooves 61 arranged at equal intervals, the middle water collecting layer 52 includes a plurality of middle water collecting grooves 62 arranged at equal intervals, and the lower water collecting layer 53 includes a plurality of lower water collecting grooves 63 arranged at equal intervals. The gaps between adjacent upper water collecting grooves 61 face the middle water collecting grooves 62, so that water drops overflowing from the upper water collecting grooves 61 directly drip from the measurement into the middle water collecting grooves 62; the gaps between adjacent middle water collecting grooves 62 face the lower water collecting grooves 63, so that water drops overflowing from the middle water collecting grooves 62 directly drip from the measurement into the lower water collecting grooves 63. The number of the middle-layer water collecting grooves 62 is at least one more than the upper-layer water collecting grooves 61, ensuring that water drops dripping from the upper-layer water collecting grooves 61 can drip into the middle-layer water collecting grooves 62 after overflowing; the number of the lower-layer water collecting grooves 63 is at least one more than the middle-layer water collecting grooves 62, ensuring that water drops dripping from the middle-layer water collecting grooves 62 can drip into the lower-layer water collecting grooves 63 after overflowing.

[0037] After the coal gas enters the coal gas inlet reducer 2, it flows to the gap between the grooves when it approaches the upper water collecting layer 51. Due to the high density and inertia of the water droplets, some of the water droplets do not have time to turn and are collected by the upper water collecting groove 61; the uncollected water droplets continue to flow downward with the coal gas. Since the gap below the upper water collecting groove 61 is just opposite to the middle water collecting groove 62, the uncollected water droplets in the upper layer are just collected by the middle water collecting groove 62; the water droplets not collected by the middle water collecting groove 62 continue to flow downward and are collected by the lower water collecting groove 63.

[0038] In this embodiment, the upper water collecting trough 61 is a V-shaped upper water collecting trough 61, the middle water collecting trough 62 is a V-shaped middle water collecting trough 62, and the lower water collecting trough 63 is a V-shaped lower water collecting trough 63. Since the channel of the gas inlet reducer pipe 2 is much larger than the pipeline, the gas flow rate gradually decreases. A reasonable arrangement of the V-shaped water collecting trough can better discharge the liquid water in the gas.

[0039] In this embodiment, any one of the V-shaped upper water collecting trough 61, V-shaped middle water collecting trough 62, and V-shaped lower water collecting trough 63 includes a first trough plate 7 and a second trough plate 8, and the first trough plate 7 and the second trough plate 8 are vertically connected to form a water collecting trough; one end of the first trough plate 7 away from the second trough plate 8 is an inclined surface inclined inward, and one end of the second trough plate 8 away from the first trough plate 7 is an inclined surface inclined inward. One end of the first trough plate 7 and the second trough plate 8 is designed as an inclined surface inclined inward, so that the gas water converges inward, avoiding directly dripping on the heat exchange plate.

[0040] In this embodiment, the water collecting and draining device 3 further includes an end plate 9, and an opening 91 for only the water collecting trough to pass through is opened on the end plate 9. The end plate 9 plays a role in supporting and fixing the multi-layer water collecting layers.

[0041] In this embodiment, in order to improve the water collecting efficiency, the area of any one of the water collecting layers 5 is larger than the flow area of the gas inlet reducer pipe 2.

[0042] In this embodiment, a drain pipe 11 is welded outside the preheater body 1, and the drain pipe 11 is communicated with the water collecting tank 4. The water and sludge in the water collecting tank 4 finally flow to the water seal drainer connected to the outside of the gas inlet reducer pipe 2 through the drain pipe 11.

[0043] Embodiment Two

[0044] Please refer to Figures 1 to 9 As shown, this embodiment provides a preheater with a water collecting and draining device, including a preheater body 1. A gas inlet reducer pipe 2 for gas to enter the preheater body 1 from top to bottom is provided on the preheater body 1. The water collecting and draining device 3 and a water collecting tank 4 are further arranged in the gas inlet reducer pipe 2; the water collecting and draining device 3 includes multiple layers of inclined water collecting layers 5. The relatively high end of the water collecting layer 5 is welded to the inner wall of the gas inlet reducer pipe 2, and the relatively low end is communicated with the water collecting tank 4; the water collecting layer 5 includes a plurality of water collecting troughs 6 arranged side by side, and adjacent water collecting troughs 6 are arranged at intervals; the water collecting tank 4 is welded in the gas inlet reducer pipe 2. Each layer of the water collecting layer 5 is inclined, and the collected water and sludge can automatically flow into the left water collecting tank 4, and finally flow to the water seal drainer connected to the outside of the gas inlet reducer pipe 2 through the drain pipe 11.

[0045] The preheater of this embodiment is used to separate, collect and gather liquid water by arranging multiple layers of water collecting layers 5 and water collecting tanks 4 with water collecting tanks 6 in the gas inlet reducer 2; and the density of gas and water differs by several hundred times to discharge the liquid water of blast furnace gas.

[0046] In this embodiment, the water collecting and drainage device 3 includes two layers of water collecting layers, which are an upper water collecting layer 51 and a lower water collecting layer 53 from top to bottom; the upper water collecting layer 51 includes a plurality of upper water collecting grooves 61 arranged at equal intervals, and the lower water collecting layer 53 includes a plurality of lower water collecting grooves 63 arranged at equal intervals; the gaps between adjacent upper water collecting grooves 61 are directly opposite to the lower water collecting grooves 63, so that water drops overflowing from the upper water collecting grooves 61 directly drip from the measurement into the lower water collecting grooves 63; the number of the lower water collecting grooves 63 is at least one more than the upper water collecting grooves 61, ensuring that the water drops dripping from the upper water collecting grooves 61 can drip into the lower water collecting grooves 63 after overflowing.

[0047] After the coal gas enters the coal gas inlet reducer 2, it flows to the gap between the grooves when it approaches the upper water collecting layer 51. Due to the high density and inertia of the water droplets, some of the water droplets do not have time to turn and are collected by the upper water collecting groove 61; the uncollected water droplets continue to flow downward with the coal gas. Since the gap below the upper water collecting groove 61 is just opposite to the lower water collecting groove 63, the uncollected water droplets in the upper layer are just collected by the lower water collecting groove 63.

[0048] In this embodiment, the upper water collecting tank 61 is a V-shaped upper water collecting tank 61, and the lower water collecting tank 63 is a V-shaped lower water collecting tank 63. Since the channel of the gas inlet reducer 2 is much larger than the pipeline, the gas flow rate gradually decreases, and the reasonable arrangement of the V-shaped water collecting tank can better discharge the liquid water in the gas.

[0049] In this embodiment, any of the V-shaped upper water collecting groove 61 and the V-shaped lower water collecting groove 63 includes a first groove plate 7 and a second groove plate 8, which are vertically connected to form a water collecting groove; one end of the first groove plate 7 away from the second groove plate 8 is an inwardly inclined slope, and one end of the second groove plate 8 away from the first groove plate 7 is an inwardly inclined slope. One end of the first groove plate 7 and the second groove plate 8 is designed as an inwardly inclined slope, so that the gas water is gathered inward to avoid dripping directly on the heat exchange plate.

[0050] In this embodiment, the water collecting and draining device 3 further comprises an end plate 9, and an opening 91 is provided on the end plate 9 for only the water collecting groove to pass through. The end plate 9 plays a role of supporting and fixing the multi-layer water collecting layer.

[0051] In this embodiment, in order to improve the water collection efficiency, the area of ​​any layer of the water collection layer 5 is larger than the flow area of ​​the gas inlet reducer 2.

[0052] In this embodiment, a drain pipe 11 is welded to the outside of the preheater body 1 , and the drain pipe 11 is connected to the water collecting tank 4 . The water and sludge in the water collecting tank 4 finally flow through the drain pipe 11 to the water seal drainer connected to the outside of the gas inlet reducer 2 .

[0053] Embodiment 3

[0054] See also Figures 1 to 8 As shown in Figure 10, this embodiment provides a preheater with a water collecting and draining device, including a preheater body 1, on which a gas inlet reducer 2 is provided for gas to enter the preheater body 1 from top to bottom, and also includes a water collecting and draining device 3 and a water collecting tank 4 arranged in the gas inlet reducer 2; the water collecting and draining device 3 includes multiple layers of water collecting layers 5 arranged obliquely, the relatively high end of the water collecting layer 5 is welded to the inner wall of the gas inlet reducer 2, and the relatively low end is connected to the water collecting tank 4; the water collecting layer 5 includes multiple water collecting tanks 6 arranged side by side, and adjacent water collecting tanks 6 are arranged at intervals; the water collecting tank 4 is welded in the gas inlet reducer 2. Each layer of water collecting layer 5 is arranged obliquely, and the collected water and sludge can automatically flow into the water collecting tank 4 on the left, and finally flow to the water seal drainer connected to the outside of the gas inlet reducer 2 through the drain pipe 11.

[0055] The preheater of this embodiment is used to separate, collect and gather liquid water by arranging multiple layers of water collecting layers 5 and water collecting tanks 4 with water collecting tanks 6 in the gas inlet reducer 2; and the density of gas and water differs by several hundred times to discharge the liquid water of blast furnace gas.

[0056] In this embodiment, the water collecting and drainage device 3 includes four water collecting layers, which are the first water collecting layer 101, the second water collecting layer 102, the third water collecting layer 103, and the fourth water collecting layer 104 from top to bottom; the first water collecting layer 101 includes a plurality of first water collecting grooves arranged at equal intervals, the second water collecting layer 102 includes a plurality of second water collecting grooves arranged at equal intervals, the third water collecting layer 103 includes a plurality of third water collecting grooves arranged at equal intervals, and the fourth water collecting layer 104 includes a plurality of fourth water collecting grooves arranged at equal intervals. The gaps between adjacent first water collecting grooves face the second water collecting grooves, so that the water drops overflowing from the first water collecting grooves directly drip from the measurement into the second water collecting grooves; the gaps between adjacent second water collecting grooves face the third water collecting grooves, so that the water drops overflowing from the second water collecting grooves directly drip from the measurement into the third water collecting grooves; the gaps between adjacent third water collecting grooves face the fourth water collecting grooves, so that the water drops overflowing from the third water collecting grooves directly drip from the measurement into the fourth water collecting grooves. The number of the second water collecting troughs is at least one more than the first water collecting troughs, ensuring that water drops dripping from the first water collecting trough can drip into the second water collecting trough after overflowing; the number of the third water collecting troughs is at least one more than the second water collecting troughs, ensuring that water drops dripping from the second water collecting trough can drip into the third water collecting trough after overflowing; the number of the fourth water collecting troughs is at least one more than the third water collecting troughs, ensuring that water drops dripping from the third water collecting trough can drip into the fourth water collecting trough after overflowing.

[0057] After the coal gas enters the gas inlet reducer 2, it flows to the gap between the grooves when it approaches the first water receiving layer 101. Due to the high density and inertia of the water droplets, some of the water droplets do not have time to turn and are collected by the first water receiving groove; the water droplets that are not collected continue to flow downward with the coal gas. Since the gap below the first water receiving groove is just facing the second water receiving layer 102, the water droplets that are not collected by the first water receiving layer 101 are just collected by the second water receiving layer 102; the water droplets that are not collected by the second water receiving layer 102 continue to flow downward and are collected by the third water receiving layer 103; the water droplets that are not collected by the third water receiving layer 103 continue to flow downward and are collected by the fourth water receiving layer 104.

[0058] In this embodiment, the first water collecting tank is a V-shaped first water collecting tank, the second water collecting tank is a V-shaped second water collecting tank, the third water collecting tank is a V-shaped third water collecting tank, and the fourth water collecting tank is a V-shaped fourth water collecting tank. Since the channel of the gas inlet reducer 2 is much larger than the pipeline, the gas flow rate gradually decreases, and the V-shaped water collecting tanks are reasonably arranged to better discharge the liquid water in the gas.

[0059] In this embodiment, any one of the V-shaped first water collecting trough, V-shaped second water collecting trough, V-shaped third water collecting trough, and V-shaped fourth water collecting trough includes a first trough plate 7 and a second trough plate 8. The first trough plate 7 and the second trough plate 8 are vertically connected to form a water collecting trough. One end of the first trough plate 7 away from the second trough plate 8 is an inclined surface that slopes inward, and one end of the second trough plate 8 away from the first trough plate 7 is an inclined surface that slopes inward. One end of the first trough plate 7 and the second trough plate 8 is designed as an inclined surface that slopes inward, so that the gas water converges inward, avoiding directly dripping onto the heat exchange plate.

[0060] In this embodiment, the water collecting and draining device 3 further includes an end plate 9, and the end plate 9 is provided with an opening 91 through which only the water collecting trough can pass. The end plate 9 plays a role in supporting and fixing the multi-layer water collecting layers.

[0061] In this embodiment, in order to improve the water collecting efficiency, the area of any one of the water collecting layers 5 is larger than the flow area of the gas inlet reducer pipe 2.

[0062] In this embodiment, a drain pipe 11 is welded outside the preheater body 1, and the drain pipe 11 is communicated with the water collecting tank 4. The water and sludge in the water collecting tank 4 finally flow through the drain pipe 11 to the water seal drainer connected outside the gas inlet reducer pipe 2.

[0063] Although the specific embodiments of the present invention have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are only illustrative, rather than used to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should all be covered by the scope protected by the claims of the present invention.

Claims

1. A preheater with a water collection and drainage device, comprising a preheater body, wherein a reduced-diameter gas inlet pipe for gas to enter the preheater body from top to bottom is provided on the preheater body, and it is characterized in that: It also includes a water collection and drainage device and a water collection tank arranged in the reduced-diameter gas inlet pipe; The water collection and drainage device includes multiple layers of water collection layers arranged obliquely. The relatively high end of the water collection layer is welded to the inner wall of the reduced-diameter gas inlet pipe, and the relatively low end is communicated with the water collection tank; the water collection layer includes a plurality of water collection troughs arranged side by side, and adjacent water collection troughs are arranged at intervals; The water collection tank is welded inside the reduced-diameter gas inlet pipe.

2. The preheater with a water collection and drainage device as described in claim 1, characterized in that: The water collection and drainage device includes three layers of water collection layers, which are the upper water collection layer, the middle water collection layer, and the lower water collection layer from top to bottom; the upper water collection layer includes a plurality of upper water collection troughs arranged at equal intervals, the middle water collection layer includes a plurality of middle water collection troughs arranged at equal intervals, and the lower water collection layer includes a plurality of lower water collection troughs arranged at equal intervals.

3. The preheater with a water collection and drainage device as described in claim 2, characterized in that: The gap between adjacent upper water collection troughs is aligned with the middle water collection trough, and the gap between adjacent middle water collection troughs is aligned with the lower water collection trough.

4. The preheater with a water collection and drainage device as described in claim 3, characterized in that: The number of the middle water collection troughs is at least one more than that of the upper water collection troughs, and the number of the lower water collection troughs is at least one more than that of the middle water collection troughs.

5. The preheater with a water collection and drainage device as described in claim 4, characterized in that: The upper water collection trough is a V-shaped upper water collection trough, the middle water collection trough is a V-shaped middle water collection trough, and the lower water collection trough is a V-shaped lower water collection trough.

6. The preheater with a water collection and drainage device as described in claim 5, characterized in that: Any one of the V-shaped upper water collection trough, V-shaped middle water collection trough, and V-shaped lower water collection trough includes a first trough plate and a second trough plate, and the first trough plate and the second trough plate are vertically connected to form a water collection trough; the end of the first trough plate away from the second trough plate is an inclined surface inclined inward, and the end of the second trough plate away from the first trough plate is an inclined surface inclined inward.

7. The preheater with a water collection and drainage device as described in claim 6, characterized in that: The water collection and drainage device further includes an end plate, and the end plate is provided with an opening through which only the water collection trough passes.

8. The preheater with a water collection and drainage device as described in claim 1, characterized in that: The water collection and drainage device includes two layers of water collection layers, which are the upper water collection layer and the lower water collection layer from top to bottom; The upper water collection layer includes a plurality of upper water collection troughs arranged at equal intervals, and the lower water collection layer includes a plurality of lower water collection troughs arranged at equal intervals; The gap between adjacent upper water collection troughs is aligned with the lower water collection trough; The number of the lower water collection troughs is at least one more than that of the upper water collection troughs.

9. The preheater with a water collection and drainage device as described in claim 1, characterized in that: The water collection and drainage device includes four layers of water collection layers, which are the first water collection layer, the second water collection layer, the third water collection layer, and the fourth water collection layer from top to bottom; The first water collection layer includes a plurality of first water collection troughs arranged at equal intervals, the second water collection layer includes a plurality of second water collection troughs arranged at equal intervals, the third water collection layer includes a plurality of third water collection troughs arranged at equal intervals, and the fourth water collection layer includes a plurality of fourth water collection troughs arranged at equal intervals; The gap between adjacent first water collection troughs is aligned with the second water collection trough, the gap between adjacent second water collection troughs is aligned with the third water collection trough, and the gap between adjacent third water collection troughs is aligned with the fourth water collection trough; The number of the second water collection troughs is at least one more than that of the first water collection troughs, the number of the third water collection troughs is at least one more than that of the second water collection troughs, and the number of the fourth water collection troughs is at least one more than that of the third water collection troughs.

10. The preheater with a water collection and drainage device according to any one of claims 1-9, characterized in that: The area of any layer of the water collection layer is larger than the flow area of the reduced-diameter gas inlet pipe.

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