Tubular heat exchanger for industrial flue gas SCR (Selective Catalytic Reduction) treatment

Abstract

The utility model discloses a tubular heat exchanger for industrial flue gas SCR (Selective Catalytic Reduction) treatment, and relates to the field of tubular heat exchangers. The tubular heat exchanger for industrial flue gas SCR treatment comprises a tubular heat exchanger body, a return chamber is arranged on the side face of the tubular heat exchanger body, a mixing mechanism is arranged in the return chamber and comprises a mounting plate arranged in the return chamber, a rotating plate is rotationally arranged outside the mounting plate, an auxiliary plate is arranged in the mounting plate, and the rotating plate is rotationally arranged outside the rotating plate. The rotating plate is arranged outside the auxiliary plate, and the auxiliary plate is used for improving the flue gas mixing effect. According to the tubular heat exchanger for industrial flue gas SCR treatment, a rotating plate is arranged on the outer surface of a mounting plate, the rotating mounting plate stirs air in a return chamber, and meanwhile, the flue gas mixing effect of the rotating plate is improved under the action of an auxiliary plate, so that flue gas enters the return chamber, and heat can be well mixed; and the smoke can better enter the next round of heat exchange.

Description

Technical Field

[0001] The utility model relates to the technical field of tubular heat exchangers, in particular to a tubular heat exchanger used for SCR treatment of industrial flue gas. Background Art

[0002] A tubular heat exchanger is a device that can exchange thermal energy, meeting the heat transfer requirements between different media, thereby saving energy and cooling materials.

[0003] The existing tubular heat exchanger has the problem of uneven alternation of hot and cold flue gas during flue gas circulation cooling;

[0004] The reason for this problem is that when industrial flue gas is SCR treated, the flue gas needs to be cooled. In order to reuse the heat in the flue gas when cooling the flue gas, a tubular heat exchanger is used. There are multiple groups of circular tubes inside the tubular heat exchanger. A branch chamber and a return chamber are respectively arranged on both sides of the circular tube. The circular tube is divided into two groups, upper and lower, by the branch chamber. The flue gas in the upper pipe enters the lower pipe through the return chamber, thereby performing two rounds of cooling treatment. Heat exchange liquid is arranged on the outside of the circular tube. When the flue gas completes alternating returns in the return chamber, the flue gas will also have different cooling effects when passing through the upper pipe due to reasons such as flow velocity, so that there is a certain temperature difference between the flue gas in different circular tubes, which makes the next round of cooling effect different again, affecting the thermal energy exchange efficiency of the tubular heat exchanger. Therefore, we propose a tubular heat exchanger for SCR treatment of industrial flue gas. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a tubular heat exchanger for SCR treatment of industrial flue gas, which solves the problem of uneven alternation of hot and cold flue gas during flue gas circulation cooling in the existing tubular heat exchanger.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a tubular heat exchanger for industrial flue gas SCR treatment, including a tubular heat exchanger body, a return chamber is arranged on the side of the tubular heat exchanger body, a mixing mechanism is arranged inside the return chamber, the mixing mechanism includes a mounting plate, which is arranged inside the return chamber, a rotating plate is rotatably arranged outside the mounting plate, the rotating plate is used to stir the flue gas, an auxiliary plate is arranged inside the mounting plate, the rotating plate is arranged outside the auxiliary plate, and the auxiliary plate is used to increase the flue gas mixing effect.

[0007] Preferably, a branch chamber is provided on the side of the tubular heat exchanger body away from the return chamber, a round tube is provided inside the tubular heat exchanger body, a partition is provided outside the round tube, and the partition is provided inside the tubular heat exchanger body.

[0008] Preferably, a rotating block is fixedly connected to the inner side of the mounting plate, and a rotating rod is rotatably connected to the inside of the rotating block.

[0009] Preferably, the outer part of the rotating rod is movably sleeved with a sleeve tube, and the rotating plate is fixedly connected to the outer part of the sleeve tube.

[0010] Preferably, an upper support plate is fixedly connected to the upper surface of the mounting plate, and the upper support plate is fixedly connected to the side surface of the tubular heat exchanger body.

[0011] Preferably, a lower support plate is fixedly connected to the lower surface of the mounting plate, and the lower support plate is fixedly connected to the side surface of the tubular heat exchanger body.

[0012] Preferably, the mounting plate is fixedly connected to the side of the tubular heat exchanger body.

[0013] The utility model discloses a tubular heat exchanger for SCR treatment of industrial flue gas, which has the following beneficial effects: the tubular heat exchanger for SCR treatment of industrial flue gas discharges flue gas into the interior of a return chamber through an upper circular tube, and a certain gas flow is generated when the flue gas is discharged from the circular tube. The gas flow drives a rotating plate to rotate, and the rotating plate stirs the flue gas inside the return chamber during the rotation process. At the same time, when the rotating plate passes the position of an auxiliary plate during the rotation process, the rotating plate and the auxiliary plate generate alternating airflows, thereby accelerating the mixing of the flue gas. By arranging a mounting plate, a rotating plate is arranged on the outer surface of the mounting plate, and the rotating mounting plate stirs the air inside the return chamber. At the same time, the flue gas mixing effect of the rotating plate is increased under the action of the auxiliary plate, so that the flue gas entering the interior of the return chamber can be well mixed with heat, so that the flue gas can better enter the next round of heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the internal structure of the main body of the tubular heat exchanger of the utility model;

[0017] Figure 3 This is a cross-sectional view of the internal structure of the return chamber of the utility model;

[0018] Figure 4It is an exploded view of the external structure of the mounting plate of the utility model.

[0019] In the figure: 1. main body of tubular heat exchanger; 101. branch chamber; 102. return chamber; 103. round tube; 104. partition; 2. mounting plate; 201. rotating plate; 202. upper support plate; 203. sleeve tube; 204. rotating rod; 205. auxiliary plate; 206. rotating block; 207. lower support plate. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The embodiment of the present application provides a tubular heat exchanger for SCR treatment of industrial flue gas, thereby solving the problem of uneven alternation of hot and cold flue gas during flue gas circulation cooling in the existing tubular heat exchangers.

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The utility model embodiment discloses a tubular heat exchanger for SCR treatment of industrial flue gas.

[0024] According to the attached Figure 1-4 As shown, it includes a tubular heat exchanger body 1, which can refer to the tubular heat exchanger with model BQ1.6. A return chamber 102 is arranged on the side of the tubular heat exchanger body 1, and a mixing mechanism is arranged inside the return chamber 102. The mixing mechanism includes a mounting plate 2, which is arranged inside the return chamber 102, a rotating plate 201 is rotatably arranged outside the mounting plate 2, and the rotating plate 201 is used to stir the flue gas, an auxiliary plate 205 is arranged inside the mounting plate 2, and the rotating plate 201 is arranged outside the auxiliary plate 205, and the auxiliary plate 205 is used to increase the flue gas mixing effect.

[0025] A branch chamber 101 is provided on one side of the tubular heat exchanger body 1 away from the return chamber 102 . A round tube 103 is provided inside the tubular heat exchanger body 1 . A partition 104 is provided outside the round tube 103 . The partition 104 is provided inside the tubular heat exchanger body 1 .

[0026] Heat exchange liquid is poured into the tubular heat exchanger body 1, and then flue gas is poured into the upper chamber of the channel chamber 101. The flue gas passes through the circular tube 103 connected to the upper chamber. The flue gas passes through the circular tube 103 to perform the first step of heat exchange with the heat exchange liquid inside the tubular heat exchanger body 1, and then the flue gas enters the return chamber 102, and then the return chamber 102 is mixed with the flue gas, and then the flue gas passes through the circular tube 103 below the tubular heat exchanger body 1, and finally the flue gas enters the position below the channel chamber 101, and is discharged from the position below the channel chamber 101. A plurality of baffles 104 are arranged inside the tubular heat exchanger body 1, and the baffles 104 can control the flow rate of the heat exchange liquid and also have the effect of mixing the heat exchange liquid.

[0027] A rotating block 206 is fixedly connected to the inner side of the mounting plate 2, a rotating rod 204 is rotatably connected to the inner side of the rotating block 206, a sleeve tube 203 is movably sleeved on the outer side of the rotating rod 204, a rotating plate 201 is fixedly connected to the outer side of the sleeve tube 203, an upper support plate 202 is fixedly connected to the upper surface of the mounting plate 2, and the upper support plate 202 is fixedly connected to the side of the tubular heat exchanger body 1.

[0028] The flue gas is discharged into the return chamber 102 through the upper circular tube 103. When the flue gas is discharged from the circular tube 103, a certain gas flow will be generated, and this gas flow will drive the rotating plate 201 to rotate. At this time, the rotating plate 201 will drive the sleeve tube 203 to rotate inside the rotating rod 204. The rotating plate 201 will stir the flue gas inside the return chamber 102 during the rotation. At the same time, when the rotating plate 201 passes the position of the auxiliary plate 205 during the rotation, the rotating plate 201 will generate alternating airflow with the auxiliary plate 205, thereby accelerating the mixing of the flue gas. By providing the mounting plate 2, the rotating plate 201 is provided on the outer surface of the mounting plate 2. When the circular tube 103 generates gas flow, the mounting plate 2 is driven to rotate, so that the mounting plate 2 stirs the air inside the return chamber 102. At the same time, under the action of the auxiliary plate 205, the flue gas mixing effect of the rotating plate 201 is increased, so that the flue gas entering the return chamber 102 can be well mixed with heat, so that the flue gas can better enter the next round of heat exchange.

[0029] The lower surface of the mounting plate 2 is fixedly connected with a lower support plate 207, and the lower support plate 207 is fixedly connected to the side of the tubular heat exchanger body 1. The mounting plate 2 is fixedly connected to the side of the tubular heat exchanger body 1. The rotating plate 201 and the sleeve tube 203 are made of light materials and are thin in thickness. The gas flow generated by the upper circular tube 103 can make the rotating plate 201 rotate. Each group of rotating plates 201 will rotate to the outside of the auxiliary plate 205. When the rotating plate 201 and the auxiliary plate 205 are connected, the gas will produce a certain alternation, thereby increasing the flue gas mixing effect.

[0030] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0031] The flue gas is discharged into the interior of the return chamber 102 through the upper circular tube 103. When the flue gas is discharged from the circular tube 103, a certain gas flow will be generated, which will drive the rotating plate 201 to rotate. The rotating plate 201 will stir the flue gas inside the return chamber 102 during the rotation. At the same time, when the rotating plate 201 passes the position of the auxiliary plate 205 during the rotation, the rotating plate 201 will generate alternating airflow with the auxiliary plate 205, thereby accelerating the mixing of the flue gas. By setting the mounting plate 2, the rotating plate 201 is set on the outer surface of the mounting plate 2, and the rotating mounting plate 2 stirs the air inside the return chamber 102. At the same time, under the action of the auxiliary plate 205, the flue gas mixing effect of the rotating plate 201 is increased, so that the flue gas entering the interior of the return chamber 102 can be well mixed with heat, so that the flue gas can better enter the next round of heat exchange.

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A tubular heat exchanger for SCR treatment of industrial flue gas, comprising a tubular heat exchanger body (1), a return chamber (102) being arranged on the side of the tubular heat exchanger body (1), characterized in that: A mixing mechanism is provided inside the return chamber (102), and the mixing mechanism comprises: A mounting plate (2) disposed inside the return chamber (102); A rotating plate (201) is rotatably arranged outside the mounting plate (2), and the rotating plate (201) is used to stir the smoke; The auxiliary plate (205) is arranged inside the mounting plate (2), and the rotating plate (201) is arranged outside the auxiliary plate (205). The auxiliary plate (205) is used to increase the smoke mixing effect.

2. The tubular heat exchanger for SCR treatment of industrial flue gas according to claim 1, characterized in that: A branch chamber (101) is provided on the side of the tubular heat exchanger body (1) away from the return chamber (102), a circular tube (103) is provided inside the tubular heat exchanger body (1), a partition (104) is provided outside the circular tube (103), and the partition (104) is provided inside the tubular heat exchanger body (1).

3. The tubular heat exchanger for industrial flue gas SCR treatment according to claim 1, characterized in that: A rotating block (206) is fixedly connected to the inner side of the mounting plate (2), and a rotating rod (204) is rotatably connected inside the rotating block (206).

4. The tubular heat exchanger for SCR treatment of industrial flue gas according to claim 3, characterized in that: The outer part of the rotating rod (204) is movably sleeved with a sleeve tube (203), and the rotating plate (201) is fixedly connected to the outer part of the sleeve tube (203).

5. The tubular heat exchanger for SCR treatment of industrial flue gas according to claim 1, characterized in that: An upper support plate (202) is fixedly connected to the upper surface of the mounting plate (2), and the upper support plate (202) is fixedly connected to the side surface of the tubular heat exchanger body (1).

6. The tubular heat exchanger for SCR treatment of industrial flue gas according to claim 1, characterized in that: A lower support plate (207) is fixedly connected to the lower surface of the mounting plate (2), and the lower support plate (207) is fixedly connected to the side of the tubular heat exchanger body (1).

7. The tubular heat exchanger for SCR treatment of industrial flue gas according to claim 1, characterized in that: The mounting plate (2) is fixedly connected to the side of the tubular heat exchanger body (1).

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