Welded plate type double-flow energy saver

Abstract

The utility model discloses a welded plate type double-flow economizer which comprises a plate bundle, a pressing plate, a side plate and a liquid side collecting pipe, the plate bundle is composed of a plurality of sets of plate pairs, and each set of plate pair is formed by welding two plates to form a liquid side channel; a boss is arranged on each of the two sides of the plate head of each plate, after the two plates are welded, the corresponding bosses are closed to form a liquid side inlet and outlet, and the two liquid side collecting pipes are in butt joint with the bosses on the two sides respectively and used for allowing fluid to pass through; a rib is arranged on the sheet bar, the rib is arranged between the two bosses, one end of the rib is in butt joint with the plate head end of the sheet bar, and a distance is reserved between the other end of the rib and the plate tail of the sheet bar; side plates are fixed to the two sides of the plate bundle, pressing plates are fixed to the outer sides of the side plates, and the pressing plates and the side plates are parallel to the plates. The liquid side channel between the plate pairs is divided into two parts through the ribs, so that fluid turns back at the plate tails in the plate pairs under the limiting action of the ribs, double flows are formed, the heat exchange efficiency is improved, and the occupied space is reduced.

Description

Technical Field

[0001] This application relates to the technical field of plate heat exchangers, and particularly to a welded plate type double - flow economizer. Background Art

[0002] The all - welded plate heat exchanger itself is a high - efficiency heat exchange device, suitable for industrial applications under high - temperature conditions, such as chemical industry, petroleum, power and other fields. In the face of large temperature differences, the single fluid path in traditional all - welded plate heat exchangers may lead to a decrease in heat exchange efficiency. In traditional single - flow all - welded plate heat exchangers, liquid - side headers need to be arranged at both the head and the tail of the plate, which cannot be applied in projects with limited installation space. Utility Model Content

[0003] Therefore, this application provides a welded plate type double - flow economizer to solve the problem of high requirements for the installation space of heat exchangers existing in the prior art.

[0004] To achieve the above object, this application provides the following technical solutions:

[0005] A welded plate type double - flow economizer includes a plate bundle, a pressing plate, side plates and liquid - side headers. The plate bundle is composed of multiple pairs of plates, and each pair of plates is formed by welding two plates to form a liquid - side channel. On both sides of the head of the plate, there is a boss respectively. After the two plates are welded, the corresponding bosses are closed to form liquid - side inlets and outlets, and the two liquid - side headers are respectively docked with the bosses on both sides for fluid passage. Ribs are arranged on the plate, and the ribs are arranged between the two bosses. One end of the rib is docked with the end of the head of the plate, and the other end has a distance from the tail of the plate.

[0006] Side plates are fixed on both sides of the plate bundle, and a pressing plate is fixed on the outside of the side plates. Both the pressing plate and the side plates are arranged parallel to the plates.

[0007] Optionally, the liquid - side header is an outward - protruding arc - shaped pipe.

[0008] Optionally, one end of the tail of the plate bundle is sealed by a bottom plate, and the bottom plate connects the two side plates. One end of the head of the plate bundle is sealed by an intermediate plate and cross bars. The intermediate plate is arranged between the two liquid - side headers for connection. There are two cross bars, which are respectively arranged outside the two liquid - side headers, and both the cross bars and the intermediate plate connect the two side plates.

[0009] Optionally, the plates are separated from each other by fixing blocks or comb - tooth plates.

[0010] Optionally, the head and the tail of the plate are fixed, and the middle part is telescopic.

[0011] Optionally, bosses or bumps protruding from the surface of the plate are provided on the plate.

[0012] Optionally, the pressing plates on both sides of the plate bundle and the side plates are fixed by clamping bolts.

[0013] Optionally, the side plates are fixed to the plate bundle by welding, and the side plates are fixed to the side plates by welding.

[0014] Compared with the prior art, the present application has at least the following beneficial effects:

[0015] 1. The arrangement of the ribs divides the liquid-side channels between the plates into two parts, so that the fluid turns back at the end of the plates inside the plate pair under the restrictive action of the ribs, forming a double flow, improving the heat exchange efficiency and reducing the occupied space.

[0016] 2. The arrangement of the fixing blocks or the comb-shaped plates can reinforce the plate bundle and ensure its stability.

[0017] 3. By adding bosses or bumps on the plates to increase the heat exchange area, the heat exchange area between the heat exchange fins and the air and between the heat exchange fins and the waste gas can be increased. Description of the Drawings

[0018] To more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings generally should not be regarded as limiting conditions when implementing the present application; for example, those skilled in the art are capable of making routine adjustments or further optimizations to the addition / deletion / attribution division of certain units (components), specific shapes, positional relationships, connection methods, dimensional proportional relationships, etc. based on the technical concept disclosed in the present application and the exemplary drawings.

[0019] Figure 1 It is a schematic structural diagram of a welded plate-type double-flow energy saver provided by an embodiment of the present application;

[0020] Figure 2 It is a cross-sectional view of an embodiment of the present application;

[0021] Figure 3 It is a schematic structural diagram of the plate in an embodiment of the present application.

[0022] Description of the Reference Numerals:

[0023] 1. Plate bundle; 2. Pressing plate; 3. Side plate; 4. Liquid-side header; 5. Boss; 6. Rib; 7. Fixing block; 8. Clamping bolt; 9. Bottom plate; 10. Intermediate plate; 11. Cross bar. Detailed Description of the Embodiment

[0024] The following further details the present application through specific embodiments in conjunction with the drawings.

[0025] In the description of this application: Unless otherwise specified, "a plurality of" means two or more. Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0026] Terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually indications of the general relative position relationship for the convenience of intuitively understanding with reference to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0027] A welded plate - type double - flow economizer, referring to Figures 1 - 3 , includes a plate bundle 1, a pressing plate 2, side plates 3, and a liquid - side header 4. The plate bundle 1 is composed of multiple groups of plate pairs welded together. Each group of plate pairs is formed by two plates being attached and welded to form a liquid - side channel. On both sides of the plate head of the plate, there is a boss 5 respectively. After the two plates are welded, the corresponding bosses 5 are closed, and the two liquid - side headers 4 are respectively docked with the bosses 5 on both sides for fluid passage, forming liquid - side inlets and outlets. In this embodiment, the liquid - side header 4 is an outward - protruding arc - shaped pipe, and the valve for controlling fluid passage is arranged at the middle position of the liquid - side header 4.

[0028] Further, in order to form a double - flow, there are ribs 6 provided on the plate. The ribs 6 are arranged between the two bosses 5. One end of the rib 6 is docked with the end of the plate head of the plate, and the other end has a distance from the plate tail of the plate. When two plates are aligned and welded, the ribs 6 are also aligned, blocking part of the liquid - side channel, so that the fluid flowing into each group of plate pairs needs to complete a complete flow path before changing the flow direction, that is, the liquid - side channel has a return path, and there is no need to complete the return by connecting two devices in series, reducing the occupied space of the device.

[0029] It should be noted that in some embodiments, the setting position of the rib 6 on the plate can be adjusted according to the actual working conditions, not necessarily in the middle, that is, for the liquid - side return flow channel formed by a single plate pair, the widths and lengths of the flow channels before and after the return do not need to be the same, that is to say, a single plate is not necessarily symmetric left - and - right.

[0030] In this embodiment, the plates are separated from each other by fixing blocks 7 or comb - tooth plates to stabilize and support the structure of the plate bundle 1 of the heat exchanger, ensuring safe operation under high - pressure and high - temperature working conditions. The combined action of these components enables the double - flow plate - type heat exchanger to more flexibly and efficiently meet complex industrial heat - exchange requirements.

[0031] Further, the length of the plate can be adjusted. The plate head and the plate tail are fixed, and the length of the middle part can be flexibly adjusted.

[0032] The length of the plate of the plate heat exchanger can be changed by adjusting the die structure. Specifically, the die usually consists of a plate head assembly, a plate tail assembly, and an intermediate core. Among them, the sizes of the plate head and plate tail assemblies remain unchanged during the production process. The key to adjusting the plate length lies in the number of intermediate cores, which determine the specific length of the plate.

[0033] To change the length of the plate, the operating steps during the production process are as follows:

[0034] (1) Retain the plate head and plate tail of the die: The plate head and plate tail are the fixed parts of the die, and their sizes and shapes determine the basic structure of the plate. Keeping these two parts unchanged ensures that the end shapes of the plates are consistent.

[0035] (2) Increase or decrease the number of intermediate cores: By increasing or decreasing the number of intermediate cores, the total length of the plate can be effectively adjusted. These cores are usually detachable and replaceable, so they can be adjusted according to needs during the production process.

[0036] (3) Adjust the die settings: After changing the number of cores, the die settings need to be adjusted accordingly to ensure the normal overall structure and function of the die. This includes checking the assembly and calibration of the die to ensure that the produced plates meet the design requirements.

[0037] Among them, adding bosses 5 or bumps protruding from the plate surface on the plate can increase the heat transfer area, that is, the heat transfer area between the heat transfer fins and air and between the heat transfer fins and exhaust gas can be increased.

[0038] Side plates 3 are fixed on both sides of the plate bundle 1, and the side plates 3 are attached to the plate bundle 1. A pressing plate 2 is also fixed on the outer side of the side plate 3, and the pressing plate 2 is attached to the side plate 3. The pressing plate 2 and the side plate 3 are both arranged parallel to the plate to press and reinforce the plate bundle 1.

[0039] For the fixing method of the side plate 3 and the pressing plate 2, in one embodiment, clamping bolts 8 can be respectively arranged at the four corners to connect the two side plates 3 and the two pressing plates 2 through the clamping bolts 8. In another embodiment, the side plate 3 and the pressing plate 2 can be directly fixed by welding.

[0040] Further, sealing is required at the head and tail positions of the plate bundle 1. In this application, the tail end of the plate bundle 1 is sealed by the bottom plate 9. The two sides of the bottom plate 9 are respectively welded to the two side plates 3, and the bottom plate 9 abuts against the tail of the plate bundle 1. At the head end of the plate bundle 1, it is sealed by an intermediate plate 10 and two cross bars 11 together. Specifically, the intermediate plate 10 is arranged between and welded to the two liquid side headers 4, and the two cross bars 11 are respectively arranged outside the two liquid side headers 4 and welded to them. Among them, the two sides of the intermediate plate 10 and the cross bars 11 are respectively welded and connected to the two side plates 3. The side plates 3 and the pressing plate 2 respectively form a gas side channel with the cross bars 11 and the bottom plate 9. The heat source waste gas applied in this economizer refers to the high-temperature waste gas discharged from a heating furnace or other similar equipment. The high-temperature waste gas enters the equipment through this gas side channel and then passes through the gaps between the plates.

[0041] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written out should also be considered to be within the scope described in this specification.

Claims

1. A welded plate type dual-flow economizer, characterized in that: The invention comprises a plate bundle (1), a pressing plate (2), a side plate (3) and a liquid side manifold (4), wherein the plate bundle (1) is composed of a plurality of plate pairs, each of which is welded by two plates to form a liquid side channel; a boss (5) is respectively arranged on both sides of the plate head, and after the two plates are welded, the corresponding bosses (5) are closed to form a liquid side inlet and outlet, and the two liquid side manifolds (4) are respectively connected to the bosses (5) on both sides for fluid to pass through; a rib (6) is arranged on the plate, and the rib (6) is arranged between the two bosses (5), one end of the rib (6) is connected to the plate head end of the plate, and the other end is spaced from the plate tail; Side plates (3) are fixed on both sides of the plate bundle (1), and a clamping plate (2) is fixed on the outer side of the side plate (3). The clamping plate (2) and the side plate (3) are arranged parallel to the plates.

2. The welded plate type dual-flow economizer according to claim 1 is characterized in that: The liquid side header (4) is an arc-shaped tube protruding outward.

3. The welded plate type dual-flow economizer according to claim 1, characterized in that: The tail end of the plate bundle (1) is sealed by a bottom plate (9), and the bottom plate (9) is connected to the two side plates (3); the head end of the plate bundle (1) is sealed by an intermediate plate (10) and a horizontal bar (11), and the intermediate plate (10) is arranged between the two liquid side headers (4) for connection, and two horizontal bars (11) are arranged, which are respectively arranged on the outside of the two liquid side headers (4), and the horizontal bar (11) and the intermediate plate (10) are both connected to the two side plates (3).

4. The welded plate type dual-flow economizer according to claim 1, characterized in that: The plates are separated from each other by a fixing block (7) or a comb plate.

5. The welded plate type dual-flow economizer according to claim 1, characterized in that: The head and tail of the plate are fixed, and the middle part is retractable.

6. The welded plate type dual-flow economizer according to claim 1, characterized in that: The plate is provided with a boss (5) or a convex point protruding from the surface of the plate.

7. The welded plate type dual-flow economizer according to claim 1, characterized in that: The clamping plates (2) and side plates (3) on both sides of the plate bundle (1) are fixed by clamping bolts (8).

8. The welded plate type dual-flow economizer according to claim 1, characterized in that: The side plate (3) is fixed to the plate bundle (1) by welding, and the side plate (3) is fixed to the side plate (3) by welding.

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