Heat exchanger for high-salinity wastewater treatment

Abstract

The utility model belongs to the technical field of tubular heat exchangers, and particularly relates to a heat exchanger for high-salinity wastewater treatment, which comprises a tube shell, a first seal head and a second seal head. The first sealing head is fixedly connected with a high-salinity wastewater inlet pipe and a high-salinity wastewater outlet pipe; a supporting table, a hot medium outlet pipe and a hot medium inlet pipe are fixedly connected to the outer wall of the pipe shell; the two ends of the tube shell are fixedly connected with a first tube plate and a second tube plate; a group of heat exchange tubes are fixedly connected between the first tube plate and the second tube plate, and the heat exchange tubes are positioned in the tube shell; the heat exchange tube is fixedly connected with a group of baffle plates; a rotating rod is arranged in the heat exchange tube; the rotating rod is fixedly connected with a pair of symmetrical scraping blades; the scraping blades are spirally arranged; the problems that when a tubular heat exchanger is used for conducting heat exchange treatment on high-salinity wastewater, along with continuous circulating evaporation and concentration of the high-salinity wastewater, the inner wall of a heat exchange tube is prone to scaling, and the heat exchange efficiency is reduced are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tube-in-tube heat exchangers, in particular to a heat exchanger for high-salt wastewater treatment. Background Art

[0002] The shell and tube heat exchanger has a relatively simple and compact structure and is relatively cheap. It is the most widely used heat exchanger in chemical production. Heat exchangers are also used in wastewater treatment to evaporate wastewater.

[0003] In the prior art, when a shell-and-tube heat exchanger is used to perform heat exchange treatment on high-salt wastewater, as the high-salt wastewater is continuously circulated, evaporated and concentrated, the inner wall of the heat exchange tube is easily scaled, thereby reducing the heat exchange efficiency. Therefore, the utility model provides a heat exchanger for high-salt wastewater treatment. Utility Model Content

[0004] In order to make up for the shortcomings of the existing technology, the problem of scaling on the inner wall of the heat exchange tube and reducing the heat exchange efficiency is solved when the high-salt wastewater is subjected to heat exchange treatment by a shell-and-tube heat exchanger, as the high-salt wastewater is continuously circulated, evaporated and concentrated.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a heat exchanger for high-salt wastewater treatment described in the utility model comprises a tube shell, a first head and a second head; a high-salt wastewater inlet pipe and a high-salt wastewater outlet pipe are fixedly connected to the first head; a support platform, a heat medium outlet pipe and a heat medium inlet pipe are fixedly connected to the outer wall of the tube shell; a first tube sheet and a second tube sheet are fixedly connected at both ends of the tube shell; a group of heat exchange tubes are fixedly connected between the first tube sheet and the second tube sheet, and the heat exchange tubes are located inside the tube shell; a group of baffles are fixedly connected to the heat exchange tubes; a rotating rod is provided inside the heat exchange tubes; a pair of symmetrical scraping blades are fixedly connected to the rotating rod; the scraping blades are spirally arranged.

[0006] Preferably, the first end cover is fixedly connected to the first tube sheet by bolts; a flow partition is fixedly connected inside the first end cover; a slot is provided on the side wall of the first tube sheet; one end of the flow partition is located in the slot; a pair of sliding plates are provided inside the first end cover, and the sliding plates slide on the surfaces of the flow partition; a group of flow openings are provided on the sliding plates; the second end cover is fixedly connected to the second tube sheet by bolts; a scraper is provided inside the second end cover, and the scraper is sealingly and slidingly connected inside the second end cover; and both ends of the rotating rod are rotatably connected to the sliding plate and the scraper respectively.

[0007] Preferably, the scraper side wall is fixedly connected to a push rod; an electric push rod is fixedly connected to the push rod; and the electric push rod is fixedly connected to the inner wall of the second head.

[0008] Preferably, a fixing rod is fixedly connected to the inner wall of the first head; the fixing rod is horizontally slidably connected to the sliding plate; and a limiting rod is fixedly connected between the fixing rods.

[0009] Preferably, a spring is disposed outside the fixing rod, and the spring is located between the sliding plate and the inner wall of the first head.

[0010] Preferably, a group of scraper rings are fixedly connected to the scraper blade; and the spacing distance between the scraper rings is twice the pushing distance of the pushing rod.

[0011] Preferably, a set of bearings are installed on one side of the sliding plate and the scraper; and the bearings are fixed to the rotating rod.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The heat exchanger for treating high-salt wastewater described in the utility model utilizes the water flow impact of the high-salt wastewater to drive the scraping blades and the rotating rod to rotate to scrape the inner wall of the heat exchange tube, thereby preventing scaling on the inner wall of the heat exchange tube and affecting the heat exchange efficiency.

[0014] 2. The utility model discloses a heat exchanger for high-salt wastewater treatment. By setting a scraper ring, the scraper ring rotates and moves with the scraping blades under the pushing action of the electric push rod, and performs secondary scraping on the inner wall of the heat exchange tube, thereby further preventing scaling on the inner wall of the heat exchange tube and affecting the heat exchange efficiency.

[0015] 3. The utility model describes a heat exchanger for high-salt wastewater treatment, in which the spacing distance between scraper rings is set to be twice the pushing distance of the push rod. When the scraper blade fails to rotate, the scraper ring can also move and scrape the entire inner wall of the heat exchange tube to prevent scaling of the inner wall of the heat exchange tube after the scraper blade fails to rotate, thereby affecting the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a side sectional view in the utility model;

[0019] Figure 3 This is a diagram of the interior and partial structure of the tube shell of the utility model;

[0020] Figure 4 This is a three-dimensional diagram of the first tube sheet of the utility model;

[0021] In the figure: 1. tube shell; 11. heat medium inlet pipe; 12. heat medium outlet pipe; 13. support platform; 2. first head; 21. flow partition; 22. sliding plate; 221. flow port; 23. fixing rod; 24. limiting rod; 25. spring; 26. high-salinity wastewater inlet pipe; 27. high-salinity wastewater outlet pipe; 3. second head; 31. scraper; 32. push rod; 33. electric push rod; 4. heat exchange tube; 41. rotating rod; 42. scraper blade; 43. scraper ring; 44. first tube sheet; 441. slot; 45. second tube sheet; 46. baffle; 5. bearing. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] Embodiment 1

[0024] like Figures 1 to 4 As shown, a heat exchanger for high-salt wastewater treatment described in an embodiment of the utility model comprises a tube shell 1, a first end cap 2 and a second end cap 3; a high-salt wastewater inlet pipe 26 and a high-salt wastewater outlet pipe 27 are fixedly connected to the first end cap 2; a support platform 13, a heat medium outlet pipe 12 and a heat medium inlet pipe 11 are fixedly connected to the outer wall of the tube shell 1; a first tube sheet 44 and a second tube sheet 45 are fixedly connected at both ends of the tube shell 1; a group of heat exchange tubes 4 are fixedly connected between the first tube sheet 44 and the second tube sheet 45, and the heat exchange tubes 4 are located inside the tube shell 1; a group of baffles 46 are fixedly connected to the heat exchange tubes 4; a rotating rod 41 is provided inside the heat exchange tubes 4; the rotating rod 4 1 is fixedly connected with a pair of symmetrical scraping blades 42; the scraping blades 42 are spirally arranged; when working, the high-salt wastewater enters the heat exchange tube 4 through the high-salt wastewater inlet pipe 26 under the action of the pump, and under the impact of the high-salt wastewater flow, the scraping blades 42 drive the rotating rod 41 to rotate, and the scraping blades 42 scrape the inner wall of the heat exchange tube 4 to prevent the high-salt wastewater from continuously concentrating to form dirt adhering to the inner wall of the heat exchange tube 4, thereby affecting the heat exchange efficiency. The heat medium enters the tube shell 1 from the heat medium inlet pipe 11, exchanges heat with the high-salt wastewater through the heat exchange tube 4, and the high-salt wastewater after heat exchange is output from the high-salt wastewater outlet pipe 27, and the heat medium after heat exchange is output from the heat medium outlet pipe 12.

[0025] Furthermore, saturated steam is selected as the heat medium.

[0026] Embodiment 2

[0027] like Figures 1 to 4As shown, on the basis of the first embodiment, the first end cap 2 is fixedly connected to the first tube sheet 44 by bolts; a flow partition 21 is fixedly connected in the first end cap 2; a slot 441 is provided on the side wall of the first tube sheet 44; one end of the flow partition 21 is located in the slot 441; a pair of sliding plates 22 are provided in the first end cap 2, and the sliding plates 22 slide on the surface of the flow partition 21; a group of flow openings 221 are provided on the sliding plates 22; the second end cap 3 is fixedly connected to the second tube sheet 45 by bolts; a scraper 31 is provided in the second end cap 3, and the scraper 31 is sealingly slidably connected in the second end cap 3; and the two ends of the rotating rod 41 are rotatably connected to the sliding plate 22 and the scraper 31 respectively.

[0028] The side wall of the scraper 31 is fixedly connected to a push rod 32; an electric push rod 33 is fixedly connected to the push rod 32; and the electric push rod 33 is fixedly connected to the inner wall of the second head 3. When working, under the action of the electric push rod 33, the push rod 32 pushes the scraper 31 to slide and scrape the inner wall of the second head 3, and at the same time, the scraper 31 drives the rotating rod 41 to move, thereby increasing the impact force of the water flow on the spiral blade, and better driving the rotating rod 41 to rotate. The movement of the rotating rod 41 drives the sliding plate 22 to slide horizontally on the flow partition 21, and the sliding plate 22 scrapes the inner wall of the first head 2 and the flow partition 21. At the same time, the flow port 221 opened on the flow partition 21 is used for the circulation of high-salinity wastewater.

[0029] Embodiment 3

[0030] like Figures 1 to 4 As shown, on the basis of the first and second embodiments, a fixing rod 23 is fixedly connected to the inner wall of the first head 2; the fixing rod 23 is horizontally slidably connected to the sliding plate 22; and a limiting rod 24 is fixedly connected between the fixing rods 23.

[0031] A group of scraper rings 43 are fixedly connected to the scraper blades 42 ; the spacing between the scraper rings 43 is twice the pushing distance of the push rod 32 .

[0032] The sliding plate 22 and the scraper 31 are both installed with bearings 5 ​​on one side; the bearing 5 is fixedly connected to the rotating rod 41; when working, the fixed rod 23 supports and limits the horizontal sliding of the sliding plate 22, and the spring 25 cooperates with the electric push rod 33 to push, and at the same time has a certain buffering effect, and the limit rod 24 limits the overall pushing distance. The setting of the bearing 5 is more conducive to the rotation of the rotating rod 41. Through the push of the electric push rod 33, the scraper ring 43 moves and rotates with the scraping blade 42 to perform secondary scraping on the inner wall of the heat exchange tube 4. By setting the interval distance between the scraper rings 43 to twice the pushing distance of the push rod 32, when the scraper blade 42 fails to rotate, the scraper ring 43 can also scrape the entire inner wall of the heat exchange tube 4 to prevent scaling of the inner wall of the heat exchange tube 4.

[0033] Working principle: high-salt wastewater enters the heat exchange tube 4 through the high-salt wastewater inlet pipe 26 under the action of the pump. Under the impact of the high-salt wastewater flow, the scraper blade 42 drives the rotating rod 41 to rotate, and the scraper blade 42 scrapes the inner wall of the heat exchange tube 4. The heat medium enters the tube shell 1 from the heat medium inlet pipe 11, and exchanges heat with the high-salt wastewater through the heat exchange tube 4. The high-salt wastewater after heat exchange is output from the high-salt wastewater outlet pipe 27, and the heat medium after heat exchange is output from the heat medium outlet pipe 12. At the same time, under the action of the electric push rod 33, the push rod 32 pushes the scraper 31 to slide and scrape the inner wall of the second head 3, and the scraper 31 drives the rotating rod 41 to move, thereby increasing the impact force of the water flow on the spiral blade and better driving the rotating rod 41 to rotate. The rotating rod 41 moves to drive the sliding plate 22 to slide horizontally on the flow partition 21. The sliding plate 22 scrapes the inner wall of the first head 2 and the flow partition 21. The flow port 221 opened on the flow partition 21 is used for the circulation of high-salt wastewater. The fixed rod 23 and the spring 25 cooperate with the electric push rod 33 to push. The limit rod 24 limits the overall pushing distance. Through the push of the electric push rod 33, the scraper ring 43 moves and rotates with the scraping blade 42 to scrape the inner wall of the heat exchange tube 4 for the second time. By setting the interval between the scraper rings 43 to twice the pushing distance of the push rod 32, when the scraper blade 42 fails to rotate, the scraper ring 43 can also scrape the entire inner wall of the heat exchange tube 4 to prevent scaling of the inner wall of the heat exchange tube 4.

[0034] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0036] The above shows and describes the basic principles, main features and 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 principles 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 heat exchanger for high-salinity wastewater treatment, characterized in that: The invention comprises a tube shell (1), a first end cap (2) and a second end cap (3); a high-salt wastewater inlet pipe (26) and a high-salt wastewater outlet pipe (27) are fixedly connected to the first end cap (2); a support platform (13), a heat medium outlet pipe (12) and a heat medium inlet pipe (11) are fixedly connected to the outer wall of the tube shell (1); a first tube sheet (44) and a second tube sheet (45) are fixedly connected at both ends of the tube shell (1); a group of heat exchange tubes (4) are fixedly connected between the first tube sheet (44) and the second tube sheet (45), and the heat exchange tubes (4) are located inside the tube shell (1); a group of baffles (46) are fixedly connected to the heat exchange tubes (4); a rotating rod (41) is provided inside the heat exchange tubes (4); a pair of symmetrical scraping blades (42) are fixedly connected to the rotating rod (41); the scraping blades (42) are arranged in a spiral shape.

2. A heat exchanger for treating high-salt wastewater according to claim 1, characterized in that: The first end cap (2) is fixedly connected to the first tube sheet (44) by bolts; a flow partition (21) is fixedly connected inside the first end cap (2); a slot (441) is provided on the side wall of the first tube sheet (44); one end of the flow partition (21) is located in the slot (441); a pair of sliding plates (22) are provided inside the first end cap (2), and the sliding plates (22) slide on the surface of the flow partition (21); a group of flow openings (221) are provided on the sliding plates (22); the second end cap (3) is fixedly connected to the second tube sheet (45) by bolts; a scraper (31) is provided inside the second end cap (3), and the scraper (31) is sealingly slidably connected inside the second end cap (3); and two ends of the rotating rod (41) are rotatably connected to the sliding plate (22) and the scraper (31) respectively.

3. A heat exchanger for treating high-salt wastewater according to claim 2, characterized in that: The side wall of the scraper (31) is fixedly connected to a push rod (32); an electric push rod (33) is fixedly connected to the push rod (32); and the electric push rod (33) is fixedly connected to the inner wall of the second end cap (3).

4. A heat exchanger for treating high-salt wastewater according to claim 2, characterized in that: A fixing rod (23) is fixedly connected to the inner wall of the first sealing head (2); the fixing rod (23) is horizontally slidably connected to the sliding plate (22); and a limiting rod (24) is fixedly connected between the fixing rods (23).

5. A heat exchanger for treating high-salt wastewater according to claim 4, characterized in that: The fixing rod (23) is provided with a spring (25) on its outer sleeve, and the spring (25) is located between the sliding plate (22) and the inner wall of the first head (2).

6. A heat exchanger for treating high-salt wastewater according to claim 3, characterized in that: A group of scraper rings (43) are fixedly connected to the scraper blades (42); the spacing distance between the scraper rings (43) is twice the pushing distance of the pushing rod (32).

7. A heat exchanger for treating high-salt wastewater according to claim 2, characterized in that: A group of bearings (5) are installed on one side of the sliding plate (22) and the scraper plate (31); the bearings (5) are fixedly connected to the rotating rod (41).

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