All-welded plate type sheet bar

Abstract

The utility model relates to an all-welded plate type plate, which belongs to the technical field of heat exchange plates and comprises a plate body, a first port and a second port are arranged at two ends of the front of the plate body, and a gas phase area, a gas-liquid two-phase coexistence area and a liquid phase area are sequentially arranged on the plate body from the first port to the second port. The area of the gas-liquid two-phase coexistence area is larger than that of the gas-phase area and that of the liquid-phase area, a plurality of first flow channels are arranged in the gas-phase area, a plurality of second flow channels are arranged in the gas-liquid two-phase coexistence area, a plurality of third flow channels are arranged in the liquid-phase area, the width of the second flow channels is larger than that of the first flow channels and that of the third flow channels, and turbulent flow structures are arranged in the second flow channels, the first flow channels and the third flow channels. According to the structure designed according to the gas phase-gas liquid phase-liquid phase characteristic, high heat exchange efficiency, low friction factor, small heat exchange area, compact equipment, small occupied area and low operation and investment cost can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchange plate technical field especially relates to a full welding plate type plate. BACKGROUND

[0002] The demand of reducing cost, improving efficiency, energy saving and emission reduction requires the old equipment and high energy consumption equipment in power, steel and chemical industries to be upgraded, but the new equipment needs to have high compactness and meet the demand of energy saving and emission reduction, cost reduction and efficiency improvement.

[0003] The existing industries use tube heat exchanger or tube type coal economizer at the evaporation or condensation waste heat recovery process point, which has C, E and F bypass leakage flow path, reduces effective heat exchange, and the flow mode is mainly cross flow, the temperature and pressure driving force is lower than that of counter flow, the heat exchange efficiency is low, and the number of series connection needs to be increased for improvement; the overall structure can only rely on baffle, fin or spoiler to improve the flow rate or heat exchange area to improve the heat exchange efficiency, but it causes the resistance drop to increase and the excessive fin, spoiler and baffle to cause heat exchange deterioration and cost performance reduction. The above overall structure causes the heat exchanger to have low heat exchange efficiency, large heat exchange area and land area, large equipment weight and transportation and installation difficulty, large resistance drop and increased investment and operation cost of the equipment.

[0004] The full welding plate type heat exchanger and the tube type heat exchanger have the same pressure resistance, but also have high heat exchange efficiency, high reliability, small land area and compact equipment, and are widely used at the waste heat recovery process point of various industries. However, under the evaporation and condensation working condition, the existing full welding light plate has low heat exchange efficiency, the full welding corrugated or bulging plate causes heat exchange deterioration due to high resistance drop, and the operation power consumption and cost increase. UTILITY MODEL CONTENTS

[0005] The utility model mainly solves the technical problems in the above background art, and provides a full welding plate type plate.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a full welding plate type plate, which comprises a plate body, the front surface of the plate body is provided with port one and port two, the plate body from port one to port two is sequentially provided with a gas phase zone, a gas-liquid two-phase coexistence zone and a liquid phase zone, the area of the gas-liquid two-phase coexistence zone is greater than the area of the gas phase zone and the liquid phase zone, a plurality of flow channels one are arranged in the gas phase zone, a plurality of flow channels two are arranged in the gas-liquid two-phase coexistence zone, a plurality of flow channels three are arranged in the liquid phase zone, the width of the flow channels two is greater than the width of the flow channels one and the flow channels three, and a spoiler structure is arranged in each of the flow channels two, the flow channels one and the flow channels three.

[0007] As a preferred, welding convex edges are fixed at the two side edges of the front surface of the plate body. It is convenient to weld and fix the adjacent plate bodies.

[0008] As a preferred, the top outside of the welding flange is provided with a support flange. The adjacent plate bodies can be supported and positioned.

[0009] As a preferred, a plurality of parallel liquid channel rib plates one are arranged in the gas phase zone, and flow channels one are formed between adjacent liquid channel rib plates one and the welding flange. The gas phase zone is designed to have multiple flow channels one, to reduce the cross-sectional area of the flow channels one and increase the flow rate of the gas.

[0010] As a preferred, the top of the liquid channel rib plate one is flush with the top of the welding flange, and the opposite liquid channel rib plates one can support each other when the adjacent plate bodies are welded, to increase the strength. The flow disturbance structure in the flow channel one includes a plurality of cross-shaped flow disturbance grooves one arranged uniformly along the flow channel one. The cross shape of the flow disturbance grooves one increases the flow disturbance of the gas and reduces the mixing of the boundary viscous stagnation layer and the intermediate gas.

[0011] As a preferred, a plurality of parallel liquid channel rib plates two are arranged in the gas-liquid two-phase coexistence zone, and flow channels two are formed between adjacent liquid channel rib plates two and the welding flange. The gas-liquid two-phase coexistence zone is designed to increase the cross-sectional area of the flow channels two and reduce the flow rate of the gas-liquid two-phase fluid.

[0012] As a preferred, the top of the liquid channel rib plate two is flush with the top of the welding flange, and the opposite liquid channel rib plates two can support each other when the adjacent plate bodies are welded, to increase the strength. The flow disturbance structure in the flow channel two includes cross-shaped flow disturbance grooves two near the gas phase zone and convex flow disturbance circular platforms near the liquid phase zone. Each flow disturbance groove two in each flow channel two is provided with multiple rows, each row is uniformly provided with multiple flow disturbance grooves two, and each flow channel two is uniformly provided with multiple flow disturbance circular platforms. The flow disturbance grooves two are concave cross shapes, which increase the flow disturbance of the gas phase in the two-phase flow. The flow disturbance circular platforms are convex circular platforms, through which the liquid phase in the two-phase flow deviates from the separation point in advance, has a large degree of disturbance, and the shapes of the flow disturbance grooves two and the flow disturbance circular platforms are designed separately according to different medium characteristics, gas-liquid ratios or dryness degrees. The degree of sparsity of the flow disturbance grooves two is less than that of the flow disturbance grooves one in the gas phase zone, to increase the degree of flow disturbance while avoiding increasing the resistance drop.

[0013] As a preferred, a plurality of parallel liquid channel rib plates three are arranged in the liquid phase zone, and flow channels three are formed between adjacent liquid channel rib plates three and the welding flange. The liquid phase zone is designed to have multiple flow channels three, to reduce the cross-sectional area of the flow channels three and increase the flow rate of the fluid.

[0014] As a kind of preferred, the top of liquid channel rib plate three is flush with the top of welded convex edge, when the adjacent plate body is welded, the opposite liquid channel rib plate three can support each other, increase strength, the turbulence structure in flow passage three includes multiple turbulence convex rib plates arranged along the width direction of flow passage one, each flow passage three is equipped with flow distribution convex circular platform near the end of gas-liquid two-phase coexistence area.The flow distribution convex circular platform is inner convex circular platform, which plays the role of flow guide, evenly distributes fluid, avoids uneven distribution to cause heat exchange dead zone, the turbulence convex rib plate is inner convex elliptical rib, which further reduces the cross-sectional area of flow passage three, since liquid phase viscosity is large, boundary viscous stagnation layer is relatively thick, heat exchange efficiency is low, turbulence convex rib plate increases the disturbance of liquid phase, increases heat exchange efficiency, and elliptical deviation is delayed, friction factor is small.

[0015] As a kind of preferred, the reverse side of plate body is fixed with butt joint convex edge on the four peripheral sidewalls, the two ends of longer butt joint convex edge of plate body are equipped with cold fluid ports, the reverse side of plate body is equipped with multiple support convex ribs, the top of support convex rib is flush with the top of butt joint convex edge.Cold fluid flows out, enters from adjacent cold fluid port through flow collecting groove, realizes countercurrent flow with hot fluid, has high logarithmic mean temperature difference, realizes higher heat transfer in unit area.

[0016] The utility model has the following beneficial effects:

[0017] The structure designed according to the characteristics of gas phase-gas-liquid two-phase-liquid phase can guarantee high heat exchange efficiency, low friction factor, small heat exchange area, compact equipment, small floor area and low operation and investment cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of embodiments or prior art. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other implementation drawings can be obtained according to the provided drawings without creating labor.

[0019] The structure, proportion, size and the like disclosed in the specification are only used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and are not used to limit the limiting conditions that the utility model can be implemented, so they do not have technical substantive significance, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that the utility model can produce, should still fall within the range that the technical content disclosed by the utility model can cover.

[0020] Figure 1 It is a front perspective structural schematic view of the utility model;

[0021] Figure 2The bottom structure schematic view of the utility model is shown in the figure;

[0022] Figure 3 The three-dimensional structure schematic view of the reverse side of the utility model is shown in the figure;

[0023] Figure 4 The butt joint three-dimensional structure schematic view of adjacent plate bodies is shown in the figure;

[0024] Figure 5 The bottom structure schematic view of the utility model is shown in the figure; Figure 4 The three-dimensional structure schematic view of the reverse side of the utility model is shown in the figure;

[0025] Legend: 1, plate body; 2, turbulence groove one; 3, port one; 4, liquid channel rib plate one; 5, liquid channel rib plate two; 6, port two; 7, turbulence rib plate; 8, liquid channel rib plate three; 9, shunt convex circular table; 10, turbulence circular table; 11, turbulence groove two; 12, welding convex edge; 13, support flanging; 14, butt joint convex edge; 15, cold fluid port; 16, support convex rib. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Embodiment one: as Figure 1 - to Figure 5 The utility model discloses a kind of full-welded plate type plate, including plate body 1, the front of plate body 1 two ends is equipped with port one 3 and port two 6, plate body 1 from port one 3 to port two 6 is equipped with gas phase zone, gas-liquid two-phase coexistence zone and liquid phase zone in sequence, the area of gas-liquid two-phase coexistence zone is greater than the area of gas phase zone and liquid phase zone, multiple flow passages one are equipped in gas phase zone, multiple flow passages two are equipped in gas-liquid two-phase coexistence zone, multiple flow passages three are equipped in liquid phase zone, the width of flow passage two is greater than the width of flow passage one and flow passage three, and each flow passage two, flow passage one and flow passage three are equipped with turbulence structure.

[0028] In condensing working condition, hot fluid flows through plate body 1 front to condense, from port one 3, flow through gas phase zone, and hot fluid is gas phase in gas phase zone, then flow through gas-liquid two-phase coexistence zone, and hot fluid is gas-liquid two-phase coexistence in gas-liquid two-phase coexistence zone, with the decrease of flow dryness, when flowing through liquid phase zone, hot fluid is liquid phase, then flow out from port two 6.

[0029] In the evaporation condition, the cold fluid flows through the front surface of the plate body 1 to evaporate, enters from the second port 6, then passes through the liquid phase area, when flowing through the liquid phase area, the cold fluid is in the liquid phase, then flows through the gas-liquid two-phase coexistence area, in which the hot fluid is in the gas-liquid two-phase coexistence, with the increase of the flow dryness, flows through the gas phase area, in which the hot fluid is in the gas phase, and flows out from the first port 3.

[0030] In the second embodiment, on the basis of the first embodiment, the plate body 1 is fixed with a welding convex edge 12 at the two side edges of the front surface.

[0031] The top outer side of the welding convex edge 12 is provided with a support flange 13.

[0032] A plurality of parallel liquid channel rib plates one 4 are arranged in the gas phase area, and the adjacent liquid channel rib plates one 4 and the welding convex edge 12 form flow channels one.

[0033] The top of the liquid channel rib plate one 4 is flush with the top of the welding convex edge 12, and the flow channel one is provided with a plurality of cross-shaped flow disturbance grooves one 2 arranged uniformly along the flow channel one.

[0034] A plurality of parallel liquid channel rib plates two 5 are arranged in the gas-liquid two-phase coexistence area, and the adjacent liquid channel rib plates two 5 and the welding convex edge 12 form flow channels two.

[0035] The top of the liquid channel rib plate two 5 is flush with the top of the welding convex edge 12, and the flow channel two is provided with cross-shaped flow disturbance grooves two 11 close to the gas phase area and upward convex flow disturbance circular platforms 10 close to the liquid phase area, each flow disturbance groove two 11 in each flow channel two is provided with a plurality of rows, each row is uniformly provided with a plurality of flow disturbance grooves, and each flow channel two is uniformly provided with a plurality of flow disturbance circular platforms 10. The flow disturbance circular platforms 10 are arranged in a 45° cross-flow manner, which increases the flow disturbance degree and has a lower friction factor. According to the requirement of the allowable pressure drop, the flow direction or other angles can be changed. The height of the flow disturbance circular platform 10 is less than the height of the liquid channel rib plate two 5.

[0036] The depth of the inner recess of the cross-shaped flow disturbance groove two 11 is less than that of the flow disturbance groove one 2, so as to avoid that the too high depth of the inner recess causes the liquid phase to deposit without flowing.

[0037] The gas phase area and the liquid phase area are single-phase areas, and the heat exists in the form of sensible heat, the heat exchange efficiency and the flow speed and the flow disturbance degree are positively correlated, and the friction factor is small; the gas-liquid two-phase coexistence area is a two-phase area, and the heat exists in the form of latent heat, the latent heat of unit mass of fluid is much larger than the sensible heat, so the area of the gas-liquid two-phase coexistence area is relatively large, the heat exchange efficiency of this area is less affected by the flow speed, and the friction factor of the gas-liquid is relatively large, which affects the pressure head and the operating cost.

[0038] A plurality of parallel liquid channel rib plates three 8 are arranged in the liquid phase area, and the adjacent liquid channel rib plates three 8 and the welding convex edge 12 form flow channels three.

[0039] The top of the liquid channel rib plate three 8 is flush with the top of the welding convex edge 12, the flow disturbance structure in the flow channel three includes a plurality of flow disturbance convex rib plates 7 arranged along the width direction of the flow channel, and each flow channel three is provided with a flow distribution convex circular platform 9 near one end of the gas-liquid coexistence area. The liquid channel rib plate one 4, the liquid channel rib plate two 5, the liquid channel rib plate three 8, the flow disturbance circular platform 10, the flow disturbance convex rib plate 7 and the flow distribution convex circular platform 9 are welded on the plate body 1. The height of the flow channel one, the flow channel two and the flow channel three can be adjusted according to the evaporation and condensation degree. According to the requirement of the allowable resistance drop, the density and shape of the liquid channel rib plate one 4, the liquid channel rib plate two 5, the liquid channel rib plate three 8, the flow disturbance groove one 2, the flow disturbance circular platform 10, the flow disturbance groove two 11, the flow distribution convex circular platform 9 and the flow disturbance convex rib plate 7 can be adjusted. The height of the flow distribution convex circular platform 9 is lower than the height of the liquid channel rib plate three 8, and the liquid is uniformly distributed, and the shape and density can be adjusted according to the actual uniform flow condition.

[0040] The flow disturbance convex rib plate 7 is an inner convex elliptical rib, and the height is lower than the height of the liquid channel rib plate three 8, and the length-width ratio is large.

[0041] The opposite side wall of the reverse surface of the plate body 1 is fixed with a butt convex edge 14, and the two ends of the longer butt convex edge 14 of the plate body 1 are provided with cold fluid ports 15. The reverse surface of the plate body 1 is provided with a plurality of support convex ribs 16, and the top of the support convex rib 16 is flush with the top of the butt convex edge 14. The butt convex edge 14 and the support convex rib 16 are welded on the plate body 1. Two plate bodies 1 are folded to form a plate pair, as shown in Figs. Figure 4 and 5 The opposite welding convex edges 12 are sealed, the opposite butt convex edges 14 are welded and sealed, and two independent and non-interfering spaces are formed inside and outside the plate pair. A plurality of plate pairs are stacked to form a heat exchange core, and the short edges are sealed to ensure that the cold and hot fluids in the heat exchange core are not mixed. In the condensation working condition, the fluid flowing out of the port two 6 is guided to the cold fluid port 15 near the port two 6 through the flow collecting and guiding structure, and then flows countercurrently with the front fluid in the area behind the cold fluid port 15. In the evaporation working condition, the fluid flowing out of the port one 3 is guided to the cold fluid port 15 near the port one 3 through the flow collecting and guiding structure, and then flows countercurrently with the front fluid in the area behind the cold fluid port 15, has a high logarithmic mean temperature difference, and realizes higher heat transfer per unit area.

[0042] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model. These changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A full-welded plate panel, comprising a panel body (1), the panel body (1) being provided with a port one (3) and a port two (6) at the front ends of the panel body (1), characterized in that: The plate body (1) is provided with a gas phase zone, a gas-liquid two-phase coexistence zone and a liquid phase zone in sequence from port one (3) to port two (6), the area of the gas-liquid two-phase coexistence zone is larger than the area of the gas phase zone and the liquid phase zone, a plurality of flow channels one are arranged in the gas phase zone, a plurality of flow channels two are arranged in the gas-liquid two-phase coexistence zone, a plurality of flow channels three are arranged in the liquid phase zone, the width of the flow channels two is larger than the width of the flow channels one and the flow channels three, and each of the flow channels two, the flow channels one and the flow channels three is provided with a turbulence structure.

2. A fully welded plate panel according to claim 1, characterized in that: The plate body (1) is provided with a gas phase zone, a gas-liquid two-phase coexistence zone and a liquid phase zone in sequence from port one (3) to port two (6), the area of the gas-liquid two-phase coexistence zone is larger than the area of the gas phase zone and the liquid phase zone, a plurality of flow channels one are arranged in the gas phase zone, a plurality of flow channels two are arranged in the gas-liquid two-phase coexistence zone, a plurality of flow channels three are arranged in the liquid phase zone, the width of the flow channels two is larger than the width of the flow channels one and the flow channels three, and each of the flow channels two, the flow channels one and the flow channels three is provided with a turbulence structure.

3. A fully welded plate panel according to claim 2, characterized in that: The top of the liquid channel rib plate one (4) is flush with the top of the welding convex edge (12), and the turbulence structure in the flow channel one includes a plurality of cross-shaped turbulence grooves one (2) arranged uniformly along the flow channel one.

4. A fully welded plate panel according to claim 2, characterized in that: The top of the liquid channel rib plate two (5) is flush with the top of the welding convex edge (12), and the turbulence structure in the flow channel two includes a cross-shaped turbulence groove two (11) close to the gas phase zone and an upper convex turbulence circular table (10) close to the liquid phase zone, each turbulence groove two (11) in each flow channel two is provided with a plurality of rows, each row is uniformly provided with a plurality of turbulence grooves, and each flow channel two is uniformly provided with a plurality of turbulence circular tables (10).

5. A fully welded plate panel according to claim 4, characterized in that: The top of the liquid channel rib plate three (8) is flush with the top of the welding convex edge (12), and the turbulence structure in the flow channel three includes a plurality of turbulence convex rib plates (7) arranged along the width direction of the flow channel one, and each flow channel three is provided with a flow distribution convex circular table (9) at one end close to the gas-liquid two-phase coexistence zone.

6. A fully welded plate panel according to claim 2, characterized in that: The plate body (1) is provided with a gas phase zone, a gas-liquid two-phase coexistence zone and a liquid phase zone in sequence from port one (3) to port two (6), the area of the gas-liquid two-phase coexistence zone is larger than the area of the gas phase zone and the liquid phase zone, a plurality of flow channels one are arranged in the gas phase zone, a plurality of flow channels two are arranged in the gas-liquid two-phase coexistence zone, a plurality of flow channels three are arranged in the liquid phase zone, the width of the flow channels two is larger than the width of the flow channels one and the flow channels three, and each of the flow channels two, the flow channels one and the flow channels three is provided with a turbulence structure.

7. A fully welded plate panel according to claim 6, characterized in that: The plate body (1) is provided with a gas phase zone, a gas-liquid two-phase coexistence zone and a liquid phase zone in sequence from port one (3) to port two (6), the area of the gas-liquid two-phase coexistence zone is larger than the area of the gas phase zone and the liquid phase zone, a plurality of flow channels one are arranged in the gas phase zone, a plurality of flow channels two are arranged in the gas-liquid two-phase coexistence zone, a plurality of flow channels three are arranged in the liquid phase zone, the width of the flow channels two is larger than the width of the flow channels one and the flow channels three, and each of the flow channels two, the flow channels one and the flow channels three is provided with a turbulence structure.

8. A fully welded plate panel according to claim 2, characterized in that: ​ 9. A fully welded plate panel according to claim 8, characterized in that: ​ 10. A fully welded plate panel according to claim 1, characterized in that: ​

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