Defoaming heat exchanger

Abstract

The utility model relates to the technical field of defoaming heat exchange, in particular to a defoaming heat exchanger which comprises two pipelines for cooling water to flow, and further comprises a plurality of folded plates which are arranged between the two pipelines at intervals, a cavity is formed in each folded plate, and the cavity is provided with a first cavity wall and a second cavity wall which are oppositely arranged; the multiple baffle plates are alternately arranged on the first cavity wall and the second cavity wall, the tail end of the baffle plate arranged on the first cavity wall is close to the second cavity wall, the tail end of the baffle plate arranged on the second cavity wall is close to the first cavity wall, and each pipeline comprises two semi-arc-shaped circular pipes and a plurality of connecting pipes; according to the heat exchanger, the problem that an existing defoaming heat exchanger is poor in heat exchange and defoaming efficiency for tail gas with high temperature and water content is solved, and the heat exchange and defoaming efficiency for the tail gas with the high temperature and water content is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of demisting heat exchange, in particular to a demisting heat exchanger. Background Art

[0002] A demister is used to separate the liquid droplets entrained in the gas in the tower to ensure the mass transfer efficiency, reduce the loss of valuable materials and improve the operation of the compressor behind the tower, reduce the water content and extend the life of the compressor. Generally, a demister is arranged at the top of the tower, which can effectively remove the fog droplets of 3 to 5 um. If a demister is arranged between the trays, not only can the mass transfer efficiency of the trays be ensured, but also the plate spacing can be reduced. The corrugated demister is one of the main forms of demisters, and the liquid droplets entrained in the gas are separated by the gas baffle.

[0003] However, in the existing demisters, for the tail gas with a higher temperature, the demisting effect is poor. Moreover, during the heat exchange process of the tail gas, the water content in the tail gas is generally only reduced by cooling the tail gas to reduce the humidity in the tail gas, and its heat exchange efficiency is poor.

[0004] For example, Chinese Patent: CN204637792U discloses a heat exchange type corrugated demister, which includes a support ring, a heat absorption tube, a corrugated plate, a gas guide tube, a convex shaft, a liquid guide tube, a liquid level gauge, a hose, a heat release tube, a cooling tank, and a limit rod. The heat absorption tube can rotate freely within a certain angle range, and the angle of the corrugated plate can be adjusted according to the gas flow rate; both the support ring and the heat absorption tube are hollow structures inside and the hollow spaces inside are interconnected. A refrigerant is filled in the support ring and the heat absorption tube to effectively separate the vaporized liquid solvent. Heat exchange is carried out by the cold liquid between the support ring and the heat absorption tube. However, its heat exchange efficiency is not the best, because during the flow of the tail gas, the contact area with the corrugated plate is the largest, and the contact area with the support ring and the heat absorption tube is smaller, so the heat exchange efficiency cannot reach the best state.

[0005] Therefore, the utility model provides a demisting heat exchanger. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a demisting heat exchanger, which solves the problem that the existing demisting heat exchanger has poor heat exchange and demisting efficiency for the tail gas with a higher temperature and water content, and greatly improves the heat exchange and demisting efficiency for the tail gas with a higher temperature and water content.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions: A demisting heat exchanger includes: two pipes for the flow of cooling water, and further includes:

[0008] A plurality of corrugated plates are arranged at intervals between the two pipes. Each corrugated plate is internally provided with a cavity for the flow and heat exchange of cooling water inside the corrugated plate. The cavity is provided with a first cavity wall and a second cavity wall arranged oppositely;

[0009] A plurality of baffle plates are alternately arranged between the first cavity wall and the second cavity wall, and the end of the baffle plate provided on the first cavity wall is close to the second cavity wall, and the end of the baffle plate provided on the second cavity wall is close to the first cavity wall to block and exchange heat of the cooling water;

[0010] Two pipes are respectively arranged on both sides of the plurality of folding plates, and each of the pipes includes:

[0011] Two semi-circular pipes are respectively connected to the upper and lower ends of the plurality of folding plates, and each semi-circular pipe is respectively connected to a flow-through pipe, wherein the upper flow-through pipe is used for water inlet, and the lower flow-through pipe is used for water outlet;

[0012] A plurality of connecting pipes are respectively connected to the two upper semi-circular pipes or connect the two lower semi-circular pipes, and the plurality of connecting pipes are also respectively corresponding to and communicating with the tops or bottoms of the plurality of folding plates, and are used for the cooling water to flow in from the top of the folding plate and flow out from the bottom for heat exchange.

[0013] Preferably, the length of the folding plate in the middle is greater than that of the folding plates near both sides, and the plurality of folding plates are arranged to form a cylindrical shape.

[0014] Preferably, the folding plate is in a wavy structure.

[0015] Preferably, the baffle plate is made of double-layer stainless steel.

[0016] The beneficial effects of the present utility model:

[0017] 1. By providing baffle plates on the folding plates and arranging the baffle plates crosswise, the cooling water can circulate along a wavy curve between the baffle plates, thereby further improving the heat exchange and defoaming efficiency between the tail gas and the folding plates.

[0018] 2. By combining the folding plates and the baffle plates, during the defoaming process, the tail gas is heat-exchanged and cooled, thereby improving the heat exchange and defoaming efficiency, reducing the space occupied by the combined use of the heat exchanger and the defoamer, and improving the space utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the whole of the present utility model.

[0020] Figure 2 It is a three-dimensional structure schematic diagram of the folding plate of the present utility model.

[0021] Figure 3 It is a top view of the present utility model.

[0022] Figure 4 It is a sectional view of the folding plate and the connecting pipe of the present utility model.

[0023] In the figure: 1. Pipeline; 11. Semi-circular round pipe; 12. Flow pipe; 13. Connecting pipe; 2. Baffle plate; 21. Cavity; 211. First cavity wall; 212. Second cavity wall; 3. Baffle. Specific implementation manner

[0024] The following further describes the usage method of the present utility model in conjunction with the accompanying drawings and specific implementation manners.

[0025] As Figures 1 to 4 shown, a demisting heat exchanger includes: two pipelines 1 for the flow of cooling water, and further includes:

[0026] A plurality of baffle plates 2 are arranged at intervals between the two pipelines 1. A cavity 21 is formed inside each baffle plate 2 for the cooling water to flow and exchange heat inside the baffle plate 2. The cavity 21 is provided with a first cavity wall 211 and a second cavity wall 212 arranged oppositely;

[0027] A plurality of baffles 3 are alternately arranged between the first cavity wall 211 and the second cavity wall 212, and the end of the baffle 3 arranged on the first cavity wall 211 is close to the second cavity wall 212, and the end of the baffle 3 arranged on the second cavity wall 212 is close to the first cavity wall 211 to block the flow of the cooling water for heat exchange; increasing the flow time of the cooling water inside the baffle plate 2, thereby improving the heat exchange efficiency.

[0028] The two pipelines 1 are respectively arranged on both sides of a plurality of baffle plates 2. Each pipeline 1 includes:

[0029] Two semi-circular round pipes 11 are respectively connected to the upper and lower ends of a plurality of baffle plates 2. Each semi-circular round pipe 11 is respectively connected to a flow pipe 12. The upper flow pipe 12 is used for water inlet, and the lower flow pipe 12 is used for water outlet; respectively used for the inflow and outflow of the cooling water.

[0030] A plurality of connecting pipes 13 are respectively connected to the two upper semi-circular round pipes 11 or connect the two lower semi-circular round pipes 11. The plurality of connecting pipes 13 are also respectively corresponding to and communicating with the tops or bottoms of a plurality of baffle plates 2, and are used for the cooling water to flow in from the top of the baffle plate 2 and flow out from the bottom for heat exchange.

[0031] Since the cooling water flows from top to bottom and the temperature will also rise, while the tail gas flows from bottom to top and the temperature of the tail gas will continue to decrease, thereby making the heat exchange effect better and improving the heat exchange efficiency.

[0032] The length of the baffle plate 2 in the middle is greater than that of the baffle plates 2 near both sides. The plurality of baffle plates 2 are arranged to form a cylindrical shape. Arranging to form a cylindrical shape is to place the baffle plate 2 inside the tower, so that the tail gas can completely pass through between the baffle plates 2 and improve the demisting heat exchange efficiency.

[0033] The folding plate 2 has a wavy structure, which can increase the contact area between the tail gas and the folding plate 2, greatly improving the heat exchange efficiency of the tail gas.

[0034] The baffle plate 3 is made of double-layer stainless steel material, or can also be made of single-layer stainless steel material.

[0035] Working process: When heat exchange and demisting are carried out, the cooling water will flow into the inner part of the semi-circular tube 11 from the two flow-through pipes 12 at the top of the folding plate 2, and enter the connecting pipe 13 through the semi-circular tube 11. Since the top and bottom of each folding plate 2 are respectively connected to the connecting pipe 13, the cooling water will flow into the folding plate 2 from the top.

[0036] After the cooling water flows into the folding plate 2, due to the blocking of the baffle plate 3, it will flow in a wavy curve inside the folding plate 2, flow out from the bottom of the folding plate 2, and flow into the connecting pipe 13 at the bottom of the folding plate 2, then flow through the connecting pipe 13 to the semi-circular tubes 11 on both sides, and finally flow out through the two flow-through pipes 12 on the two semi-circular tubes 11. The tail gas will flow upward between the multiple baffle plates 3, thereby carrying out heat exchange and demisting on the tail gas, greatly improving the efficiency of heat exchange and demisting of the tail gas.

[0037] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A defoaming heat exchanger, comprising: Two pipes (1) for cooling water flow, characterized in that they also include: A plurality of folded plates (2) are arranged at intervals between the two pipes (1); each folded plate (2) has a cavity (21) formed inside thereof for cooling water to flow inside the folded plate (2) for heat exchange; the cavity (21) has a first cavity wall (211) and a second cavity wall (212) arranged opposite to each other; A plurality of baffles (3) are alternately arranged on the first cavity wall (211) and the second cavity wall (212), and the ends of the baffles (3) arranged on the first cavity wall (211) are close to the second cavity wall (212), and the ends of the baffles (3) arranged on the second cavity wall (212) are close to the first cavity wall (211), so as to perform flow resistance heat exchange on cooling water; The two pipes (1) are respectively arranged on both sides of the plurality of folding plates (2), and each of the pipes (1) comprises: Two semi-arc-shaped circular tubes (11) are respectively connected to the upper and lower ends of the plurality of folded plates (2); each semi-arc-shaped circular tube (11) is respectively connected to a flow pipe (12), wherein the flow pipe (12) at the upper end is used for water inlet, and the flow pipe (12) at the lower end is used for water outlet; A plurality of connecting pipes (13) are respectively connected to two semi-arc circular pipes (11) located at the upper end or to two semi-arc circular pipes (11) located at the lower end. The plurality of connecting pipes (13) also respectively correspond to and communicate with the tops or bottoms of the plurality of folding plates (2) to allow cooling water to flow in from the top of the folding plate (2) and flow out from the bottom for heat exchange.

2. A defoaming heat exchanger according to claim 1, characterized in that: The folding plate (2) located in the middle is longer than the folding plates (2) close to the two sides, and a plurality of the folding plates (2) are arranged to form a cylindrical shape.

3. The defoaming heat exchanger according to claim 1, characterized in that: The folding plate (2) is a wave-shaped structure.

4. The defoaming heat exchanger according to claim 1, characterized in that: The baffle (3) is made of double-layer stainless steel.

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