Plate heat exchanger for gas-gas heat exchange

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a plate heat exchanger for gas-gas heat exchange, which is characterized by comprising at least three rectangular concave-convex plume point plates, a plurality of concave points and convex points which are distributed in a staggered manner are arranged on the concave-convex plume point plates, and the front surfaces of two adjacent concave-convex plume point plates correspond to each other. The positions of the concave points on the opposite front surfaces or the opposite back surfaces of the two concave-convex feather point plates correspond to each other, and the convex points correspond to each other and abut against each other; the four edges of each concave-convex feather point plate are respectively provided with a bent edge, the bending directions of every two adjacent bent edges on one concave-convex feather point plate are opposite, the bending directions of the bent edges on the same side of every two adjacent concave-convex feather point plates are opposite, and the bent edges of the two parallel opposite edges are connected in a sealed mode. A gas heat exchange channel is formed between every two adjacent concave-convex plume point plates.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and more specifically, to a plate heat exchanger used for gas-to-gas heat exchange. Background Art

[0002] Plate heat exchangers on the market are widely used in steam-liquid and liquid-liquid heat exchange. For structural strength, stainless steel is mostly used as the material. The cost of stainless steel is relatively high. In order to reduce costs, the market wants to replace it with aluminum alloy materials. Aluminum alloy materials are relatively low in price, good in plasticity, low in density, and high in thermal conductivity. They can replace more expensive materials, but their structural strength is not high. Due to poor pressure bearing capacity, aluminum plate-fin heat exchangers are more widely used in the waste heat recovery industry and are not often made into plate heat exchangers. When they are made into plate heat exchangers, in order to increase the structural strength, they are usually designed as corrugated plates. The existing aluminum corrugated plates for gas-to-gas heat exchange on the market are prone to dust accumulation during use, and due to the structure of the corrugations, they have the defect of low conductivity. Only the airflow resistance that conforms to the direction of the corrugations is low. When used as a whole, the airflow resistance at other positions that do not conform to the corrugations is large, so they are less used. Utility Model Content

[0003] The utility model aims to provide a plate heat exchanger for air-to-air heat exchange, which can have better flow guiding effect and greater structural strength, and is not easy to accumulate dust when the actual airflow passes through.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions: a plate heat exchanger for gas-to-gas heat exchange, comprising at least three rectangular concave-convex feather point plates, on which a plurality of staggered concave points and convex points are arranged, the front sides of two adjacent concave-convex feather point plates correspond to the front sides, the back sides correspond to the back sides, and the concave points on the opposite front sides or back sides of the two concave-convex feather point plates correspond to each other, and the convex points correspond to each other and conflict with each other;

[0005] The four edges of the concave-convex feather point plate are respectively provided with bent edges, the bending directions of two adjacent bent edges on a concave-convex feather point plate are opposite, the bending directions of the bent edges on the same side of two adjacent concave-convex feather point plates are opposite, and there are two parallel bent edges on opposite edges that are sealed and connected, and a gas heat exchange channel is formed between the two adjacent concave-convex feather point plates.

[0006] As a preferred technical solution of the utility model, the concave points on one of the concave-convex feather point plates are distributed in a number of parallel straight lines, the convex points on one of the concave-convex feather point plates are also distributed in a number of parallel straight lines, and the adjacent concave points and convex points on one of the concave-convex feather point plates are distributed in a centrally symmetrical manner.

[0007] As a preferred technical solution of the utility model, the concave points and the convex points are respectively long strip grooves with opposite directions at the groove bottom, and the groove mouth of the long strip groove has two long sides and two narrow sides, wherein the two long sides are parallel, and the two narrow sides are outwardly convex semicircular arcs, and the groove bottom to the groove mouth of the long strip groove are smooth arc surfaces.

[0008] As a preferred technical solution of the utility model, the bottom of the grooves of the concave points and the convex points are also provided with a central circular groove with the same concave direction as the groove bottom, and the relative convex points of two adjacent concave and convex feather point plates only have the groove bottoms of the central circular grooves that conflict with each other.

[0009] As a preferred technical solution of the utility model, the long sides of the notches of the concave points and the convex points are respectively at 45 degrees to the air intake direction.

[0010] As a preferred technical solution of the utility model, the concave-convex feather point plate is an aluminum alloy plate, and the concave points, the convex points and the bent edges are all made by stamping.

[0011] As a preferred technical solution of the utility model, the bent edge includes a vertical edge and a horizontal edge, one side of the vertical edge is vertically connected to the main body of the concave-convex feather point plate, and the other side of the vertical edge is vertically fixedly connected to the horizontal edge, and the horizontal edges of the connecting parts of two adjacent concave-convex feather point plates are facing each other and welded to seal.

[0012] As a preferred technical solution of the utility model, sealing grooves in opposite directions are respectively arranged on the horizontal edges of the two welding seals, and elastic sealing gaskets are filled in the sealing grooves. Connecting holes are evenly opened at positions outside the sealing grooves on the horizontal edges, and connecting bolts are arranged in the connecting holes. The free ends of the screws of the connecting bolts are provided with matching locking nuts.

[0013] In summary, the utility model has the following beneficial effects: two adjacent concave-convex feather point plates form support points with each other, and compared with the corrugated plate, the pressure bearing performance is better, and because the concave points and convex points are staggered, there are convex points on both sides of the concave-convex feather point plate, so convex point support can be formed on both sides, and while forming support, the heat exchange area can be increased and the heat transfer effect can be enhanced;

[0014] The middle circular groove is used for support. The concave and convex pressing depth of the long strip groove is slightly lower than that of the dot, which can improve the strength and reduce the risk of tangential cracking. The symmetrically arranged concave and convex points have more diversion advantages.

[0015] The convex point is not at a vertical angle to the airflow direction, and the convex point actually blocks the convex point support only at the position relative to the central circular groove, forming a self-supporting structure, thereby ensuring heat exchange and preventing dust accumulation or making it easy to clean the dust accumulation;

[0016] The concave-convex feather point board is an integrally formed board, which has higher structural stability and strength than welding and other joint structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the gas heat exchange channel of the utility model;

[0019] Figure 3 yes Figure 1 A magnified image of area A;

[0020] Figure 4 yes Figure 2 Magnified view of area B.

[0021] In the figure: 1. concave and convex feather point plate; 2. concave point; 3. convex point; 4. bent edge; 5. gas heat exchange channel; 6. center circular groove; 7. vertical edge; 8. horizontal edge; 9. sealing groove; 10. connecting bolts. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] like Figure 1-4 As shown, the utility model provides a plate heat exchanger for gas-to-gas heat exchange, comprising at least three rectangular concave-convex feather point plates 1, on which a plurality of staggered concave points 2 and convex points 3 are arranged, and the front sides of two adjacent concave-convex feather point plates 1 correspond to the front sides, and the back sides correspond to the back sides, and the concave points 2 on the front or back sides of the two concave-convex feather point plates 1 correspond to each other, and the convex points 3 correspond to each other and conflict with each other.

[0024] It should be noted here that the convex point 3 and the concave point 2 are defined relative to the plane, that is, two adjacent concave-convex point plates 1 are defined relative to the plane. Figure 2For the middle position, the back side of the upper concave-convex feather point plate 1 is opposite to the back side of the lower concave-convex feather point plate 1, then the convex part relative to the back side is considered to be convex point 3, and the concave part relative to the back side is concave point 2. At this time, the concave points 2 and 2 of the two concave-convex feather point plates 1 are far apart, while the convex points 3 and convex points 3 are supported in conflict. Without distinguishing the front and back sides and only taking the upper top surface as the reference, the concave points 2 of the upper concave-convex feather point plate 1 and the convex points 3 of the lower feather point plate 1 are supported in conflict with each other to form a gas heat exchange channel.

[0025] That is, two adjacent concave-convex feather point plates 1 form support points with each other through corresponding abutting convex points 3 or concave points 2, and the pressure bearing performance thereof is better than that of the corrugated plate. Moreover, since the concave points 2 and the convex points 3 are staggeredly distributed, there are protrusions on both sides of the concave-convex feather point plate 1, so abutting support can be formed on both sides, and while forming support, the heat exchange area can also be increased, and the heat transfer effect can be enhanced.

[0026] Specifically, Figure 3 As shown, the concave point 2 and the convex point 3 are respectively long strip grooves with opposite directions at the bottom of the groove, and the groove mouth of the long strip groove has two long sides and two narrow sides, wherein the two long sides are parallel, and the two narrow sides are convex semicircular arcs, and the groove bottom to the groove mouth of the long strip groove are smooth arc surfaces. The concave point 2 and the convex point 3 are both similar in shape to the "feather point" type, with symmetrical pressing of the pattern, significantly enhanced strength, and in the shape of a long strip, and have better ductility than the common circular concave and convex point 3.

[0027] Further, such as Figure 4 As shown, the bottom of the groove of the concave point 2 and the convex point 3 is also provided with a central circular groove 6 in the same direction as the concave direction of the groove bottom. The relative convex points 3 of the two adjacent concave-convex feather point plates 1 only have the bottom of the central circular groove 6 in contact with each other, and the middle circular groove is used for support. The concave-convex pressing depth of the long strip groove is slightly lower than that of the circular point, which can be used to improve the strength while reducing the risk of tangential cracking.

[0028] like Figure 1 As shown, the concave points 2 on a concave-convex feather point plate 1 are distributed in a number of parallel straight lines, and the convex points 3 on a concave-convex feather point plate 1 are also distributed in a number of parallel straight lines. The adjacent concave points 2 and convex points 3 on a concave-convex feather point plate 1 are respectively distributed in a central symmetrical manner, and the convex points 3 and concave points 2 on the plate surface are respectively distributed in a straight line, and the concave points 2 and convex points 3 are symmetrically distributed, and the flow resistance is smaller than that of the corrugated plate. The long sides of the notches of the concave points 2 and convex points 3 are respectively 45° with the air intake direction, and both the hot side airflow direction and the cold side airflow direction play a role in guiding and reducing resistance. Compared with the corrugated plate, which is mostly axially symmetrical and only has the disadvantage of small airflow resistance in the direction of the corrugation, the concave points 2 and convex points 3 of the utility model have more advantages in guiding.

[0029] The four edges of the concave-convex feather point plate 1 are respectively provided with bent edges 4, and the bending directions of two adjacent bent edges 4 on one concave-convex feather point plate 1 are opposite, and the bending directions of the bent edges 4 on the same side of two adjacent concave-convex feather point plates 1 are opposite, and there are two parallel bent edges 4 on opposite edges that are sealed and connected. Figure 2 As shown, a gas heat exchange channel 5 is formed between two adjacent concave-convex feather point plates 1.

[0030] Specifically, the bent edge 4 includes a vertical edge 7 and a horizontal edge 8. One side of the vertical edge 7 is vertically connected to the main body of the concave-convex feather point plate 1, and the other side of the vertical edge 7 is vertically fixedly connected to the horizontal edge 8. The horizontal edges 8 of the connecting parts on the two adjacent concave-convex feather point plates 1 are facing each other and welded and sealed. The welding and sealing method can be quickly achieved during actual operation and installation, with high operating efficiency and good connection stability.

[0031] It should be noted that when the utility model is in actual use, the number of concave points 2 and convex points 3 on a concave-convex feather point plate 1 is not exactly the same, but they are always symmetrically distributed, the dusty gas is set on the side with fewer convex points 3, the convex points 3 are not at a vertical angle to the airflow direction, and the convex points 3 actually block the support of the convex points 3 only relative to the center circular groove 6, forming self-support, unlike the corrugated plate that requires additional support, thereby ensuring heat exchange while not being easy to accumulate dust or easy to clean accumulated dust.

[0032] As an embodiment of the utility model, the concave-convex feather point plate 1 is an aluminum alloy plate body. The aluminum alloy material has a relatively low price, good plasticity, low density, high thermal conductivity and certain strength. The concave points 2, convex points 3 and bent edges 4 are all made by stamping, that is, the concave-convex feather point plate 1 of the utility model is an integrally formed plate body, which has higher structural stability and structural strength than welding and other joint structures.

[0033] As an embodiment of the utility model, sealing grooves 9 in opposite directions are respectively arranged on the horizontal edges 8 of the two welded seals, and the sealing grooves 9 are filled with elastic sealing gaskets. The horizontal edges 8 are evenly provided with connecting holes at the positions outside the sealing grooves 9, and connecting bolts 10 are arranged in the connecting holes. The free ends of the screws of the connecting bolts 10 are provided with matching locking nuts, so that elastic sealing gaskets can be added at the positions of the bending edges 4 to perform elastic sealing, thereby having a better sealing effect.

[0034] The working principle and advantages of the plate heat exchanger for gas-to-gas heat exchange of the utility model are as follows: two adjacent concave-convex feather point plates 1 form support points for each other, and compared with the corrugated plate, the pressure bearing performance is better, and because the concave points 2 and the convex points 3 are staggered, there are convexities on both sides of the concave-convex feather point plate 1, so support can be formed on both sides, and at the same time, the heat exchange area can be increased, and the heat transfer effect can be enhanced;

[0035] The middle circular groove is used for support. The concave-convex pressing depth of the long strip groove is slightly lower than that of the dot, which can improve the strength and reduce the risk of tangential cracking. The symmetrically arranged concave point 2 and convex point 3 have a better flow diversion advantage.

[0036] The convex point 3 is not at a vertical angle to the airflow direction, and the convex point 3 actually blocks the convex point 3 only at the position relative to the central circular groove 6, forming a self-supporting structure, thereby ensuring heat exchange and preventing dust from accumulating or making it easy to clean the accumulated dust;

[0037] The concave-convex feather point plate 1 is an integrally formed plate body, and has higher structural stability and structural strength than a joint structure such as welding.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plate heat exchanger for gas-to-gas heat exchange, characterized in that: The invention comprises at least three rectangular concave-convex feather point plates (1), wherein a plurality of staggered concave points (2) and convex points (3) are arranged on the concave-convex feather point plates (1), the front sides of two adjacent concave-convex feather point plates (1) correspond to each other, and the back sides correspond to each other, and the concave points (2) on the opposite front sides or back sides of the two concave-convex feather point plates (1) correspond to each other, and the convex points (3) correspond to each other and conflict with each other; The four edges of the concave-convex feather point plate (1) are respectively provided with bent edges (4); two adjacent bent edges (4) on one concave-convex feather point plate (1) have opposite bending directions; the bent edges (4) on the same side of two adjacent concave-convex feather point plates (1) have opposite bending directions; and two parallel bent edges (4) on opposite edges are sealed and connected; a gas heat exchange channel (5) is formed between the two adjacent concave-convex feather point plates (1).

2. A plate heat exchanger for gas-to-gas heat exchange according to claim 1, characterized in that: The concave points (2) on one of the concave-convex feather point plates (1) are distributed in the form of a plurality of parallel straight lines, the convex points (3) on one of the concave-convex feather point plates (1) are also distributed in the form of a plurality of parallel straight lines, and the adjacent concave points (2) and convex points (3) on one of the concave-convex feather point plates (1) are respectively distributed in a centrally symmetrical manner.

3. A plate heat exchanger for gas-to-gas heat exchange according to claim 2, characterized in that: The concave point (2) and the convex point (3) are respectively long strip grooves with opposite directions at the groove bottom, and the groove mouth of the long strip groove has two long sides and two narrow sides, wherein the two long sides are parallel, and the two narrow sides are outwardly convex semicircular arcs, and the groove bottom to the groove mouth of the long strip groove are all smooth arc surfaces.

4. A plate heat exchanger for gas-to-gas heat exchange according to claim 3, characterized in that: The groove bottoms of the concave points (2) and the convex points (3) are also provided with central circular grooves (6) in the same concave direction as the groove bottoms, and the relative convex points (3) of two adjacent concave-convex feather point plates (1) only have the groove bottoms of the central circular grooves (6) in contact with each other.

5. A plate heat exchanger for gas-to-gas heat exchange according to claim 4, characterized in that: The long sides of the notches of the concave point (2) and the convex point (3) are respectively at an angle of 45° to the air intake direction.

6. A plate heat exchanger for gas-to-gas heat exchange according to claim 5, characterized in that: The concave-convex feather point plate (1) is an aluminum alloy plate, and the concave points (2), the convex points (3) and the bent edges (4) are all made by stamping.

7. A plate heat exchanger for gas-to-gas heat exchange according to claim 6, characterized in that: The bent edge (4) comprises a vertical edge (7) and a horizontal edge (8); one side of the vertical edge (7) is vertically connected to the body of the concave-convex feather point plate (1); the other side of the vertical edge (7) is vertically fixedly connected to the horizontal edge (8); the horizontal edges (8) of the connecting parts on two adjacent concave-convex feather point plates (1) are opposite to each other and welded and sealed.

8. The plate heat exchanger for gas-to-gas heat exchange according to claim 7, characterized in that: The two welded sealed horizontal edges (8) are respectively provided with sealing grooves (9) in opposite directions, and elastic sealing pads are filled in the sealing grooves (9). The horizontal edges (8) are evenly provided with connection holes at positions outside the sealing grooves (9), and connection bolts (10) are provided in the connection holes. The free ends of the screw rods of the connection bolts (10) are provided with matching locking nuts.

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