A heat exchanger header structure

Abstract

The present invention discloses a heat exchanger header structure, including an end plate, and a plurality of header groups are sequentially arranged side by side on the outer side of the end plate, each header group is composed of a steam inlet header and a drain header arranged side by side, a plurality of second through holes are arranged on the header inner side plate of each steam inlet header, a plurality of third through holes are arranged on the header inner side plate of each drain header, each second through hole on each steam inlet header is butted against the first through hole on the end plate, each third through hole on each drain header is butted against the first through hole on the end plate, an inlet is arranged on the upper part of the outer side plate of each steam inlet header, the inlets of the steam inlet headers in all header groups are simultaneously connected to the steam inlet branch pipe, and a steam inlet pipe flange is arranged on the steam inlet branch pipe; an outlet is arranged on the lower part of the outer side plate of each drain header, the outlets of the drain headers in all header groups are simultaneously connected to the drain branch pipe, and a drain pipe flange is arranged on the drain branch pipe. The present invention has the advantage of improving the use stability of the heat exchanger.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers for optimizing flue gas utilization, energy saving and emission reduction, and in particular to a heat exchanger header structure. Background Art

[0002] At present, the flue gas of most of the domestic power, steel, coking, and chemical industries is sprayed or wet desulfurized before being discharged, and the temperature is reduced to 45~55℃. At this time, the flue gas is usually saturated wet flue gas, which contains a large amount of water vapor, and the water vapor contains more soluble salts, SO3, gel dust, fine dust and other components that can form haze; if the flue gas is discharged directly from the chimney and enters the ambient air with a lower temperature, due to the relatively low saturated humidity of the ambient air, during the process of reducing the flue gas temperature, the water vapor in the flue gas will condense to form colored plumes, and the colored plumes will seriously form "chimney rain" and "gypsum rain" within a certain range around the chimney. In order to prevent the low-temperature saturated flue gas from forming white flocs and damaging the chimney during the process of being discharged into the outside through the chimney, it is generally necessary to install a heat exchange device in the flue to heat the low-temperature saturated flue gas.

[0003] The structure of the heat exchange device currently used is: it includes two end plates distributed on the left and right, and a plurality of heat exchange tubes are supported in parallel and spaced from top to bottom between the two end plates. All the heat exchange tubes are connected end to end through a plurality of elbows to form a plurality of independent and parallel serpentine heat exchange pipelines. The inlets of all the serpentine heat exchange pipelines are connected to a water inlet header at the same time, and the outlets of all the serpentine heat exchange pipelines are connected to a water outlet header at the same time. The above-mentioned heat exchange device has the following disadvantages: (1) Due to the large number of elbows, welding elbows is not only time-consuming and labor-intensive, but also prone to welding defects, affecting the safety of the heat exchanger; (2) Due to the large number of elbows, the heat exchange medium in the heat exchanger is prone to swirl when flowing through the elbows in the tube, causing the heat exchange tube to vibrate violently during operation, affecting the stability of the heat exchanger. The vibration will also aggravate the friction between the heat exchange tube and the bracket, posing a risk of leakage and reducing the service life of the heat exchanger; (3) The heat exchanger is only equipped with one water inlet header and one water outlet header. When the water inlet header or the water outlet header fails, the heat exchanger needs to be shut down for maintenance, and online maintenance of the heat exchanger cannot be achieved. Summary of the invention

[0004] The object of the present invention is to provide a heat exchanger header structure which can improve the service stability of the heat exchanger.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a heat exchanger header structure, including an end plate, on which a plurality of first through holes for inserting the ends of heat exchange tubes are arranged, the first through holes on the end plate are arranged into a plurality of rows of first through hole groups, and a plurality of header groups are arranged side by side in sequence on the outer side of the end plate, each header group is composed of a steam inlet header and a drain header arranged side by side, each steam inlet header and drain header respectively corresponds to a row of first through hole groups, a plurality of second through holes are arranged from top to bottom on the header inner plate facing the end plate on each steam inlet header, a plurality of third through holes are arranged from top to bottom on the header inner plate facing the end plate on each drain header, the second through holes of the steam inlet header in each header group correspond one-to-one with the third through holes of its drain header, and each second through hole on each steam inlet header A first steam inlet connecting pipe is connected to a corresponding first through hole on the end plate, and each third through hole on each drain manifold is connected to a corresponding first through hole on the end plate through the first drain connecting pipe. An inlet is provided on the upper part of the outer side plate of the steam inlet manifold in each manifold group, and the inlets of the steam inlet manifolds in all manifold groups are simultaneously connected with the steam inlet branch pipe through the second steam inlet connecting pipe, one end of the steam inlet branch pipe is closed and the other end is open, and a steam inlet pipe flange is provided at the open end of the steam inlet branch pipe; an outlet is provided on the lower part of the outer side plate of the drain manifold in each manifold group, and the outlets of the drain manifolds in all manifold groups are simultaneously connected with the drain branch pipe through the second drain connecting pipe, one end of the drain branch pipe is closed and the other end is open, and a drain pipe flange is provided at the open end of the drain branch pipe.

[0006] Further, the aforementioned heat exchanger manifold structure, wherein: the structure of the steam inlet manifold includes: a steam inlet manifold body with a U-shaped cross-section, and a steam inlet manifold sealing plate for closing the open end of the steam inlet manifold body, a second through hole connected to the first through hole on the end plate is arranged on the inner side plate of the manifold body facing the end plate, and an inlet connected to the steam inlet branch pipe is arranged on the upper side wall of the steam inlet manifold sealing plate.

[0007] Further, the aforementioned heat exchanger manifold structure, wherein: the structure of the hydrophobic manifold includes: a hydrophobic manifold body with a U-shaped cross-section, and a hydrophobic manifold sealing plate for closing the open end of the hydrophobic manifold body, a third through hole connected to the first through hole on the end plate is arranged on the inner side plate of the hydrophobic manifold body facing the end plate, and an outlet connected to the hydrophobic branch pipe is arranged on the lower side wall of the hydrophobic manifold sealing plate.

[0008] Furthermore, in the aforementioned heat exchanger header structure, a plurality of lifting holes for facilitating lifting are provided on the upper portion of the end plate.

[0009] Furthermore, in the aforementioned heat exchanger header structure, a plurality of reinforcing flat steels are fixed on the end plate.

[0010] Furthermore, in the aforementioned heat exchanger manifold structure, valves for opening and closing the corresponding connecting pipes are respectively provided on each first steam inlet connecting pipe, each second steam inlet connecting pipe, each first drain connecting pipe, and each second drain connecting pipe.

[0011] Through the implementation of the above technical solutions, the beneficial effects of the present invention are as follows: (1) By replacing elbows with a header, the number of elbows is reduced, so that the heat exchange medium in the heat exchanger flows more smoothly in the tube, the degree of vibration of the heat exchange tube during operation is reduced, and the operating stability of the heat exchanger is improved; the friction between the heat exchange tube and the bracket is reduced, the leakage risk is eliminated, and the effective service life of the heat exchanger is extended; (2) By replacing elbows with a header, the number of elbows is reduced, thereby reducing the elbow welding operation and reducing the labor intensity of workers; (3) It is easy to assemble and can realize online maintenance of the faulty header group without shutting down the entire heat exchanger, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a heat exchanger header structure described in the present invention.

[0013] Figure 2 yes Figure 1 Schematic diagram of the structure from the right side.

[0014] Figure 3 yes Figure 1 Schematic diagram of the structure from a top-down perspective.

[0015] Figure 4 yes Figure 1 Schematic diagram of the three-dimensional structure.

[0016] Figure 5 yes Figure 1 Schematic diagram of the structure of the steam inlet header body of the middle steam inlet header.

[0017] Figure 6 yes Figure 1 Schematic diagram of the structure of the steam inlet header sealing plate of the middle steam inlet header.

[0018] Figure 7 yes Figure 1 Schematic diagram of the structure of the drain header body of the drain header.

[0019] Figure 8 yes Figure 1 Schematic diagram of the structure of the drain header sealing plate of the drain header. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, a heat exchanger header structure comprises an end plate 1, on which a plurality of first through holes for inserting the ends of heat exchange tubes are arranged, the first through holes on the end plate 1 are arranged into a plurality of rows of first through hole groups, and a plurality of header groups are arranged side by side in sequence on the outer side of the end plate 1, each header group is composed of a steam inlet header 2 and a drain header 3 arranged side by side, each steam inlet header 2 and drain header 3 respectively corresponds to a row of first through hole groups, a plurality of second through holes 4 are arranged from top to bottom on the header inner plate facing the end plate 1 on each steam inlet header 2, a plurality of third through holes 5 are arranged from top to bottom on the header inner plate facing the end plate 1 on each drain header 3, the second through holes 4 of the steam inlet header 2 in each header group correspond one-to-one with the third through holes 5 of the drain header 3, and each second through hole 4 on each steam inlet header 2 is connected to the end via a first steam inlet connecting pipe 6 A first through hole corresponding to the plate 1 is provided on each of the third through holes 5 on each drain header 3, and a first through hole corresponding to the end plate 1 is connected to each of the third through holes 5 on the end plate 1 through a first drain connecting pipe 7. An inlet 8 is provided on the upper part of the outer side plate of the steam inlet header 2 in each header group, and the inlets 8 of the steam inlet headers 2 in all header groups are respectively connected to the steam inlet branch pipe 10 through the second steam inlet connecting pipe 9, one end of the steam inlet branch pipe 10 is closed and the other end is open, and a steam inlet pipe flange 11 is provided at the open end of the steam inlet branch pipe 10; an outlet 12 is provided on the lower part of the outer side plate of the drain header 3 in each header group, and the outlets 12 of the drain headers 3 in all header groups are respectively connected to the drain branch pipe 14 through the second drain connecting pipe 13, one end of the drain branch pipe 14 is closed and the other end is open, and a drain pipe flange 15 is provided at the open end of the drain branch pipe 14;

[0022] In the present embodiment, the structure of the steam inlet manifold 2 includes: a steam inlet manifold body 21 with a U-shaped cross section, and a steam inlet manifold sealing plate 22 for closing the open end of the steam inlet manifold body 21, a second through hole 4 connected to the first through hole on the end plate 1 is arranged on the inner side plate of the manifold body 21 facing the end plate 1, and an inlet 8 connected to the steam inlet branch pipe 10 is arranged on the upper side wall of the steam inlet manifold sealing plate 22. The above-mentioned steam inlet manifold structure is simple and easy to disassemble and maintain; in the present embodiment, the structure of the drain manifold 3 includes: a drain manifold body 31 with a U-shaped cross section, and a drain manifold for closing the open end of the drain manifold body 31. The sealing plate 32, the third through hole 5 connected with the first through hole on the end plate 1 is arranged on the inner side plate of the header body 31 facing the end plate 1, and the outlet 12 connected with the drain branch pipe 14 is arranged on the lower side wall of the sealing plate 32 of the drain header. The above-mentioned drain header has a simple structure and is easy to disassemble and maintain; in this embodiment, a plurality of lifting holes 16 are arranged on the upper part of the end plate 1 for easy lifting, so that it is convenient for a vehicle to move the header as a whole through the lifting holes; in this embodiment, a plurality of reinforcing flat steels 17 are fixed on the end plate 1, so that the strength of the header as a whole can be increased, thereby increasing the overall strength of the heat exchanger and improving the safety of the heat exchanger;

[0023] In this embodiment, a valve 18 for opening and closing the corresponding connecting pipe is respectively provided on each first steam inlet connecting pipe 6, each second steam inlet connecting pipe 9, each first drain connecting pipe 7, and each second drain connecting pipe 13. In this way, when a certain manifold group fails, the valves 18 on the first steam inlet connecting pipe 6 and the second steam inlet connecting pipe 9 connected to the steam inlet manifold 2 in the failed manifold group can be closed, and the valves 18 on the first drain connecting pipe 7 and the second drain connecting pipe 13 connected to the drain manifold 3 in the failed manifold group can be closed at the same time, thereby realizing online maintenance of the failed manifold group without shutting down the entire heat exchanger, thereby improving work efficiency.

[0024] The assembly process of the heat exchanger using the present header structure is as follows: take another end plate, which is also provided with a plurality of first through holes for inserting the ends of the heat exchange tubes, the first through holes on the end plate 1 correspond one-to-one to the first through holes on the end plate 1 of the present header structure, and each pair of first through holes between the two end plates supports a heat exchange tube, that is: the steam inlet header 2 of each header group will be connected to a row of heat exchange tubes correspondingly, and the drain header 3 of each header group will also be connected to a row of heat exchange tubes correspondingly, and a row of heat exchange tubes corresponding to the steam inlet header of each header group and a row of heat exchange tubes corresponding to the drain header are connected in pairs through a plurality of elbows, so that the steam inlet header 2 and the drain header 3 of each header group form an independent heat exchange tube and an elbow. Heat exchange pipelines, each heat exchange pipeline is relatively independent and not interconnected; when the heat exchanger is working, the high-temperature steam is passed into the steam inlet branch pipe 10 through the steam inlet pipe flange 11, and the high-temperature steam entering the steam inlet branch pipe 10 is distributed to each steam inlet header 2 through each second steam inlet connecting pipe 9 and the inlet 8, and the high-temperature steam in each steam inlet header 2 is then distributed to each heat exchange pipe through each first steam inlet connecting pipe 6. When the high-temperature steam flows through the heat exchange pipe, it will exchange heat with the flue gas in the flue, thereby heating the flue gas. The condensed water formed after the heat exchange of the high-temperature flue gas will enter each drain header 3 through each first drain connecting pipe 7, and the condensed water in each drain header 3 will then be collected into the drain branch pipe 14 through each second drain connecting pipe 13, and then discharged through the drain pipe flange 15.

[0025] The advantages of the present invention are as follows: (1) the number of elbows is reduced by replacing the elbows with the header, so that the heat exchange medium in the heat exchanger flows more smoothly in the tube, the shaking degree of the heat exchange tube during operation is reduced, and the operation stability of the heat exchanger is improved; the friction between the heat exchange tube and the bracket is reduced, the leakage risk is eliminated, and the effective service life of the heat exchanger is extended; (2) the number of elbows is reduced by replacing the elbows with the header, thereby reducing the elbow welding operation and reducing the labor intensity of workers; (3) the assembly is convenient, and the faulty header group can be repaired online without shutting down the entire heat exchanger, thereby improving work efficiency.

[0026] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. A heat exchanger header structure, comprising an end plate, on which a plurality of first through holes for inserting heat exchange tube ends are arranged, the first through holes on the end plate being arranged into a plurality of rows of first through hole groups, characterized in that: Several header groups are arranged side by side in sequence on the outside of the end plate, each header group is composed of a steam inlet header and a drain header arranged side by side, each steam inlet header and drain header respectively corresponds to a column of first through-hole groups, a plurality of second through-holes are arranged from top to bottom on the header inner plate facing the end plate on each steam inlet header, a plurality of third through-holes are arranged from top to bottom on the header inner plate facing the end plate on each drain header, the second through-holes of the steam inlet header in each header group correspond one-to-one to the third through-holes of its drain header, each second through-hole on each steam inlet header is connected to a corresponding first through-hole on the end plate through a first steam inlet connecting pipe, and each third through-hole on each drain header A first through hole corresponding to the end plate is connected to the connection end plate through the first drain connection pipe, an inlet is provided at the upper part of the outer side plate of the steam inlet header in each header group, and the inlets of the steam inlet headers in all header groups are simultaneously connected to the steam inlet branch pipe through the second steam inlet connection pipe, one end of the steam inlet branch pipe is closed and the other end is open, and a steam inlet pipe flange is provided at the open end of the steam inlet branch pipe; an outlet is provided at the lower part of the outer side plate of the drain header in each header group, and the outlets of the drain headers in all header groups are simultaneously connected to the drain branch pipe through the second drain connection pipe, one end of the drain branch pipe is closed and the other end is open, and a drain pipe flange is provided at the open end of the drain branch pipe; The structure of the steam inlet header includes: a steam inlet header body with a U-shaped cross section, and a steam inlet header sealing plate for sealing the open end of the steam inlet header body, a second through hole connected with the first through hole on the end plate is arranged on the header inner side plate of the steam inlet header body facing the end plate, and an inlet connected with the steam inlet branch pipe is arranged on the upper side wall of the steam inlet header sealing plate; The structure of the drain header includes: a drain header body with a U-shaped cross section, and a drain header sealing plate for sealing the open end of the drain header body, a third through hole connected to the first through hole on the end plate is arranged on the inner side plate of the drain header body facing the end plate, and an outlet connected to the drain branch pipe is arranged on the lower side wall of the drain header sealing plate; A number of lifting holes are provided on the upper part of the end plate for easy lifting; A number of reinforcing flat steels are fixed on the end plate; valves for opening and closing the corresponding connecting pipes are respectively arranged on each first steam inlet connecting pipe, each second steam inlet connecting pipe, each first drain connecting pipe, and each second drain connecting pipe.

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