Heat exchanger for brine refining

Abstract

The utility model belongs to the technical field of brine refining equipment, and particularly relates to a heat exchanger for brine refining, which comprises a plate heat exchanger, and the output end of the plate heat exchanger is connected with a heat exchange mixing structure. The plate heat exchanger and the heat exchange mixing structure are both connected with saline water branch pipes. The plate heat exchanger is further connected with a water inlet pipe and a water outlet pipe corresponding to the water inlet pipe. The heat exchange mixing structure comprises a heat exchange cylinder communicated with the salt water branch pipes, a cold salt water pipe communicated with the output end of the plate heat exchanger is arranged on the heat exchange cylinder, and a salt water mixing pipe is connected to the cold salt water pipe; a steam pipe is further arranged on the heat exchange cylinder, a heating pipe is connected to the steam pipe, and mixing holes are formed in the heating pipe and the saline water mixing pipe; the heating pipe and the saline water mixing pipe are sleeved with spiral guide plates; the heat exchanger effectively solves the problem that an existing heat exchanger is inconvenient to exchange heat.

Description

Technical Field

[0001] The utility model belongs to the technical field of brine refining equipment, and particularly relates to a heat exchanger for brine refining. Background Art

[0002] In the brine refining process of the chlor-alkali industry, the brine needs to be stably controlled at around 60°C to ensure the speed at which solid salts dissolve in the brine and maintain a stable brine concentration. During this process, plate heat exchangers are often used to control the brine temperature. Because circulating water and low-pressure steam share the same pipe, they are switched based on the heat exchanger outlet temperature. This presents the following technical issues: When switching, the current heat exchange medium must be stopped and drained before switching. If the circulating water cannot be completely drained, steam can enter, easily causing pipe collisions. Furthermore, during the switching process, there is a period of time (vacuum period), which can easily affect the quality of the brine. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a heat exchanger for brine refining, which effectively solves the problem of inconvenient heat exchange in the existing heat exchanger.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a heat exchanger for brine refining, comprising a plate heat exchanger, wherein the output end of the plate heat exchanger is connected to a heat exchange mixing structure; the plate heat exchanger and the heat exchange mixing structure are both connected to a brine distribution pipe, and the plate heat exchanger is also connected to a water inlet pipe and a water outlet pipe corresponding to the water inlet pipe; the heat exchange mixing structure comprises a heat exchange cylinder connected to the brine distribution pipe, the heat exchange cylinder is provided with a cold brine pipe connected to the output end of the plate heat exchanger, and the cold brine pipe is connected to a brine mixing pipe; the heat exchange cylinder is also provided with a steam pipe, the steam pipe is connected to a heating pipe, and the heating pipe and the brine mixing pipe are both provided with mixing holes; the heating pipe and the brine mixing pipe are both provided with spiral guide plates.

[0005] Furthermore, the spiral guide plate is evenly distributed with perforations arranged along the circumference.

[0006] Furthermore, the brine branch pipes are connected to the brine main pipe, and both of the pair of brine branch pipes are connected to the brine main pipe.

[0007] Furthermore, the output end of the plate heat exchanger is connected to a connecting pipe that is in communication with the cold brine pipe.

[0008] Furthermore, the steam pipe is connected to an input pipe, and a steam valve is provided on the input pipe.

[0009] Furthermore, the heat exchange tube is provided with an inlet connected to the brine branch pipe, and the inlet is arranged close to the steam pipe; the heat exchange tube is also provided with a brine outlet pipe corresponding to the inlet, and the brine outlet pipe is arranged close to the cold brine pipe.

[0010] Furthermore, valves are provided on the brine distribution pipe, water inlet pipe, water outlet pipe, connecting pipe and brine outlet pipe.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] When the utility model is in use, one path of brine is cooled by the plate heat exchanger, the other path of brine is cooled by the heat exchange mixing structure, and the cold and hot brine are mixed, so that the brine output from the heat exchange mixing structure meets the standards; and the hot and cold exchange of the two paths of brine does not interfere with each other, and they work separately, which can effectively avoid the problem that steam and circulating water interfere with each other in a heat exchange structure and affect the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the process diagram of the utility model;

[0014] Figure 2 This is a schematic structural diagram of the heat exchange mixing structure of the present utility model;

[0015] In the figure: 1. Plate heat exchanger, 2. Heat exchange mixing structure, 3. Water inlet pipe, 4. Brine main pipe, 5. Brine branch pipe, 6. Connecting pipe, 7. Water outlet pipe, 8. Brine outlet pipe, 9. Cold brine pipe, 10. Spiral guide plate, 11. Perforation, 12. Brine mixing pipe, 13. Heating pipe, 14. Mixing hole, 15. Steam pipe. DETAILED DESCRIPTION

[0016] A heat exchanger for brine refining, such as Figure 1 and Figure 2 As shown, it includes a plate heat exchanger 1, and the output end of the plate heat exchanger 1 is connected to a heat exchange mixing structure 2; the plate heat exchanger 1 and the heat exchange mixing structure 2 are both connected to a brine distribution pipe 5, and the plate heat exchanger 1 is also connected to a water inlet pipe 3 and a water outlet pipe 7 corresponding to the water inlet pipe 3; the heat exchange mixing structure 2 includes a heat exchange cylinder connected to the brine distribution pipe 5, and the heat exchange cylinder is provided with a cold brine pipe 9 connected to the output end of the plate heat exchanger 1, and the cold brine pipe 9 is connected to a brine mixing pipe 12; the heat exchange cylinder is also provided with a steam pipe 15, and the steam pipe 15 is connected to a heating pipe 13, and the heating pipe 13 and the brine mixing pipe 12 are both provided with mixing holes 14; the heating pipe 13 and the brine mixing pipe 12 are both provided with a spiral guide plate 10.

[0017] When the utility model is in use, the plate heat exchanger 1 cools one brine, the heat exchange mixing structure 2 cools one brine, and the cold and hot brine are mixed so that the brine coming out of the heat exchange mixing structure 2 meets the standard; and the hot and cold exchange of the two brine does not interfere with each other, and they work separately, which can effectively avoid the problem of interference between steam and circulating water in a heat exchange structure, which affects the heat exchange effect.

[0018] Specifically, a path of brine is introduced through the plate heat exchanger 1, and circulating water enters the plate heat exchanger 1 through the water inlet pipe 3 and flows out from the water outlet pipe 7 to cool the brine. The cooled brine flows into the cold brine pipe 9 through the output end of the plate heat exchanger 1, and flows into the heat exchange cylinder through the mixing hole 14 on the brine mixing tube 12; another path of brine enters the heat exchange cylinder, and steam enters the heat exchange tube through the steam pipe 15, and is heated by contact with the brine through the mixing hole 14 on the heat exchange tube. The heated brine and the cooled brine are mixed under the action of the spiral guide plate 10, and the cold and hot brine are adjusted according to the temperature so that the brine coming out of the heat exchange cylinder meets the standard, thereby improving the convenience of this application.

[0019] Furthermore, the spiral guide plate 10 is evenly distributed with perforations 11 arranged along the circumference. The arrangement of the perforations 11 facilitates the flow of salt water, thereby achieving a better mixing effect of the salt water.

[0020] Furthermore, the brine branch pipes 5 are connected to the brine main pipe 4 , and the pair of brine branch pipes 5 are both connected to the brine main pipe 4 ; brine flows into the pair of brine branch pipes 5 through the brine main pipe 4 .

[0021] Furthermore, the output end of the plate heat exchanger 1 is connected to a connecting pipe 6 that is in communication with the cold brine pipe 9 , and the plate heat exchanger 1 flows into the cold brine pipe 9 through the connecting pipe 6 .

[0022] Furthermore, the steam pipe 15 is connected to an input pipe, and a steam valve is provided on the input pipe, so that steam enters the steam pipe 15 through the input pipe.

[0023] Furthermore, the heat exchanger is provided with an inlet connected to the brine distribution pipe 5, which is located near the steam pipe 15. The heat exchanger is also provided with a brine outlet pipe 8 corresponding to the inlet, which is located near the cold brine pipe 9. Brine flows into the heat exchanger through the inlet and flows out through the brine outlet pipe 8.

[0024] Furthermore, valves are provided on the brine branch pipe 5, the water inlet pipe 3, the water outlet pipe 7, the connecting pipe 6, and the brine outlet pipe 8. By setting the valves, each pipeline is controlled to make the heat exchange effect of the brine more accurate.

[0025] The working process of this utility model is:

[0026] When the present invention is in use, brine flows into a pair of brine branch pipes 5 through the brine main pipe 4, and circulating water enters the plate heat exchanger 1 through the water inlet pipe 3 and flows out from the water outlet pipe 7 to cool the brine. The cooled brine flows into the cold brine pipe 9 through the connecting pipe 6 on the plate heat exchanger 1, and flows into the heat exchange cylinder through the mixing hole 14 on the brine mixing pipe 12; the other brine flows into the heat exchange cylinder through the inlet of the heat exchange cylinder, and the steam enters the steam pipe 15 through the input pipe, enters the heat exchange tube through the steam pipe 15, and is heated by contact with the brine through the mixing hole 14 on the heat exchange tube. The heated brine and the cooled brine are mixed under the action of the spiral guide plate 10; the brine of the cold and hot routes is adjusted according to the temperature so that the brine coming out of the heat exchange cylinder meets the standard, thereby improving the convenience of this application.

Claims

1. A heat exchanger for brine refining, characterized in that: The invention comprises a plate heat exchanger (1), wherein the output end of the plate heat exchanger (1) is connected to a heat exchange mixing structure (2); the plate heat exchanger (1) and the heat exchange mixing structure (2) are both connected to a salt water distribution pipe (5), and the plate heat exchanger (1) is also connected to a water inlet pipe (3) and a water outlet pipe (7) corresponding to the water inlet pipe (3); the heat exchange mixing structure (2) comprises a heat exchange cylinder connected to the salt water distribution pipe (5), the heat exchange cylinder is provided with a cold salt water pipe (9) connected to the output end of the plate heat exchanger (1), and the cold salt water pipe (9) is connected to a salt water mixing pipe (12); the heat exchange cylinder is also provided with a steam pipe (15), the steam pipe (15) is connected to a heating pipe (13), and the heating pipe (13) and the salt water mixing pipe (12) are both provided with mixing holes (14); the heating pipe (13) and the salt water mixing pipe (12) are both sleeved with spiral guide plates (10).

2. The heat exchanger for brine purification according to claim 1, characterized in that: The spiral guide plate (10) is evenly provided with perforations (11) arranged along the circumference.

3. The heat exchanger for brine purification according to claim 1, characterized in that: The brine branch pipes (5) are connected to the brine main pipe (4), and the pair of brine branch pipes (5) are both in communication with the brine main pipe (4).

4. The heat exchanger for brine purification according to claim 3, characterized in that: The output end of the plate heat exchanger (1) is connected to a connecting pipe (6) which is in communication with a cold brine pipe (9).

5. The heat exchanger for brine purification according to claim 4, characterized in that: The steam pipe (15) is connected to an input pipe, and a steam valve is provided on the input pipe.

6. The heat exchanger for brine purification according to claim 5, characterized in that: The heat exchange cylinder is provided with an inlet connected to the brine distribution pipe (5), and the inlet is arranged close to the steam pipe (15); the heat exchange cylinder is also provided with a brine outlet pipe (8) corresponding to the inlet, and the brine outlet pipe (8) is arranged close to the cold brine pipe (9).

7. The heat exchanger for brine purification according to claim 6, characterized in that: Valves are provided on the brine distribution pipe (5), the water inlet pipe (3), the water outlet pipe (7), the connecting pipe (6), and the brine outlet pipe (8).

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