Water temperature adjusting device of heat exchanger

Abstract

The invention provides a water temperature adjusting device of a heat exchanger and relates to the technical field of heat exchangers. The water temperature adjusting device of the heat exchanger comprises a heat exchange box body, the inner wall of the heat exchange box body is fixedly connected with five partition plates which are arranged in an up-down staggered mode, the interior of the heat exchange box body is divided into four isolation areas by the three partition plates located on the lower portion, and a first temperature sensor is installed in each isolation area. The first temperature sensor is arranged in the heat exchange box body, the temperature in different isolation areas in the heat exchange box body is detected through the first temperature sensor, water with different temperatures can be discharged through the first water discharge pipe, the second water discharge pipe, the third water discharge pipe and the fourth water discharge pipe, a user can select the temperature according to needs, and the heat exchange box is suitable for more conditions.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and in particular to a water temperature regulating device for a heat exchanger. Background Art

[0002] In the fields of electricity, metallurgy, chemical industry, building materials, etc., the temperature of flue gas is relatively high, which causes some heat loss. The heat loss of flue gas is the largest of all heat losses in power station boilers. Generally, when large and medium-sized power station boilers are operating normally, the heat loss of flue gas accounts for 4% to 8% of the heat input of boiler fuel; and every 15°C to 25°C reduction in flue gas temperature can increase the boiler efficiency by about 1%. With the continuous deepening of energy conservation work in my country and the continuous rise in coal prices, people are paying more and more attention to the energy waste caused by high flue gas temperature. A small number of power plants have begun to try to use flue gas waste heat recovery devices to reduce the temperature of flue gas emissions by another 20°C to 50°C, and have achieved initial results.

[0003] The heat exchanger is the main equipment for the flue gas waste heat recovery device to realize waste heat recovery. It is arranged in the flue to realize the recovery and utilization of flue gas waste heat. The existing heat exchanger generally exchanges heat between flue gas and cold water, and the hot water after heating is recycled. However, the temperature of the hot water after heating is not considered in the prior art. When people need water at different temperatures, the hot water after heat exchange still needs to be temperature-adjusted, which undoubtedly adds trouble. In addition, in the existing heat exchanger, since the flue gas contains a large amount of smoke dust, the flue gas will also be filtered during the heat exchange process. However, as time goes by, the smoke dust on the filter net will cause the flue gas transmission efficiency to slow down. Summary of the invention

[0004] In view of the problem that the temperature of hot water discharged from the existing heat exchanger cannot be adjusted, the present invention provides a water temperature regulating device for a heat exchanger with adjustable outlet water temperature, which solves the defects and shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a water temperature regulating device for a heat exchanger, comprising a heat exchange box, the inner wall of the heat exchange box is fixedly connected with five partition plates which are staggered up and down, the three partition plates located at the bottom divide the interior of the heat exchange box into four isolation areas, each of the isolation areas is equipped with a first temperature sensor, the interior of the heat exchange box is provided with a serpentine pipe, one end of the serpentine pipe is fixedly connected with a first air duct, the other end of the serpentine pipe is fixedly connected with a second air duct, the second air duct extends away from one end of the serpentine pipe to the outside of the heat exchange box, the bottom of the heat exchange box is connected with a first drain pipe, a second drain pipe, a third drain pipe and a fourth drain pipe, and a water distribution assembly is connected between the first drain pipe, the second drain pipe, the third drain pipe and the fourth drain pipe.

[0006] Preferably, the water distribution assembly includes four distribution water pipes, and the four distribution water pipes are respectively fixedly connected to the first drain pipe, the second drain pipe, the third drain pipe and the fourth drain pipe, and the other ends of the four distribution water pipes are commonly fixedly connected to a central mixing pipe, and a second temperature sensor is installed on the central mixing pipe.

[0007] Preferably, water valves are installed on the first drain pipe, the second drain pipe, the third drain pipe, the fourth drain pipe, the distribution water pipe and the collecting mixing pipe.

[0008] Preferably, a cold water inlet pipe is fixedly connected to the top of the heat exchange box, and the cold water inlet pipe corresponds to an isolation area away from the first gas pipeline, and the first drain pipe, the second drain pipe, the third drain pipe and the fourth drain pipe correspond to the four isolation areas respectively.

[0009] Preferably, the end of the first air duct away from the serpentine tube is fixedly connected to a filter cylinder, the interior of the filter cylinder is fixedly connected to a first filter net, the end of the filter cylinder away from the first air duct is fixedly connected to a third air duct, and the outer surface of the filter cylinder is connected to a blowing assembly.

[0010] Preferably, the blowing assembly comprises a fifth air conduit fixedly connected to the outer surface of the filter cylinder body, one end of the fifth air conduit away from the filter cylinder body is fixedly connected to an air compressor, and the inlet of the air compressor is connected to the filter assembly.

[0011] Preferably, the filter assembly includes a first filter tube connected to the inlet of the air compressor, the end of the first filter tube away from the air compressor is fixedly connected to a filter box, the other side of the filter box is fixedly connected to a second filter tube, and the interior of the filter box is fixedly connected to a second filter net.

[0012] Preferably, a fourth air pipeline is fixedly connected to the lower outer surface of the filter cylinder, the fourth air pipeline is located close to the third air pipeline, and the fifth air pipeline is located close to the first air pipeline.

[0013] Preferably, gas valves are installed on the first gas pipeline, the third gas pipeline, the fourth gas pipeline and the fifth gas pipeline, and a gas flow meter is provided on the first gas pipeline.

[0014] Preferably, a controller is further included, and the gas valve, water valve, first temperature sensor, second temperature sensor, gas flow meter and air compressor are all electrically connected to the controller.

[0015] The present invention has the following beneficial effects: The present invention arranges a first temperature sensor in the heat exchange box, and detects the temperatures in different isolation zones in the heat exchange box through the first temperature sensor, and can discharge water of different temperatures through the first drain pipe, the second drain pipe, the third drain pipe and the fourth drain pipe; by arranging a second temperature sensor on the aggregate mixing pipe, the temperature of the mixed water in the aggregate mixing pipe is detected by the second temperature sensor, and when more water of different temperatures is needed, different distribution pipes are controlled to enter and discharge water, so that water of different temperatures enters the aggregate mixing pipe, and water of multiple temperatures can be mixed to become the required water temperature, and the user can select the temperature according to the needs, which is suitable for more situations.

[0016] The present invention utilizes Internet of Things technology to arrange a gas flow meter on the air intake pipe. When the gas flow meter detects that the flue gas flow rate entering the first air pipe is too low, the air valves on the third air pipe and the first air pipe are closed first, and the air valves on the fourth air pipe and the fifth air pipe are opened. Then, the air compressor is started. The air compressor delivers pressurized air into the interior of the filter cylinder, so that the pressurized air recoils the first filter screen to remove the smoke and dust accumulated on the first filter screen. The smoke and dust fall through the fourth air pipe, thereby ensuring an efficient filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the heat exchange box of the present invention; Figure 3 For the present invention Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 It is a cross-sectional view of the heat exchange box of the present invention; Figure 5 A top view of the present invention; Figure 6 It is a schematic diagram of the internal structure of the filter cylinder of the present invention.

[0018] Among them, 1. heat exchange box; 2. partition plate; 3. isolation area; 4. first temperature sensor; 5. serpentine pipe; 6. first air duct; 7. second air duct; 8. filter cylinder; 9. first filter; 10. third air duct; 11. fourth air duct; 12. fifth air duct; 13. air compressor; 14. filter box; 15. second filter; 16. first drain pipe; 17. second drain pipe; 18. third drain pipe; 19. fourth drain pipe; 20. distribution water pipe; 21. summary mixing pipe; 22. second temperature sensor; 23. cold water inlet pipe; 24. gas flow meter. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-6 As shown, an embodiment of the present invention provides a water temperature regulating device for a heat exchanger, comprising a heat exchange box 1, the inner wall of the heat exchange box 1 is fixedly connected with five partition plates 2 which are staggered up and down, the three partition plates 2 located at the bottom divide the interior of the heat exchange box 1 into four isolation areas 3, each isolation area 3 is equipped with a first temperature sensor 4, the interior of the heat exchange box 1 is provided with a serpentine tube 5, one end of the serpentine tube 5 is fixedly connected with a first air duct 6, the other end of the serpentine tube 5 is fixedly connected with a second air duct 7, and the second air duct 7 extends away from one end of the serpentine tube 5 to the outside of the heat exchange box 1.

[0021] The bottom of the heat exchange box 1 is connected with a first drain pipe 16, a second drain pipe 17, a third drain pipe 18 and a fourth drain pipe 19, and a water distribution assembly is connected between the first drain pipe 16, the second drain pipe 17, the third drain pipe 18 and the fourth drain pipe 19. The water distribution assembly includes four distribution water pipes 20, which are fixedly connected to the first drain pipe 16, the second drain pipe 17, the third drain pipe 18 and the fourth drain pipe 19 respectively, and the other ends of the four distribution water pipes 20 are commonly fixedly connected with a collection mixing pipe 21, and a second temperature sensor 22 is installed on the collection mixing pipe 21.

[0022] The first temperature sensor 4 is provided to detect the temperature conditions in different isolation zones 3, and water of different temperatures can be discharged through the first drain pipe 16, the second drain pipe 17, the third drain pipe 18 and the fourth drain pipe 19. When more water of different temperatures is needed, different distribution water pipes 20 are controlled to enter and discharge water, so that water of different temperatures enters the summary mixing pipe 21. Water of multiple temperatures can be mixed to become the required water temperature, and the temperature of the mixed water in the summary mixing pipe 21 is detected by the second temperature sensor 22.

[0023] Water valves are installed on the first drain pipe 16, the second drain pipe 17, the third drain pipe 18, the fourth drain pipe 19, the distribution water pipe 20 and the aggregate mixing pipe 21. A cold water inlet pipe 23 is fixedly connected to the top of the heat exchange box 1, and the cold water inlet pipe 23 corresponds to the isolation area 3 away from the first gas pipeline 6. The first drain pipe 16, the second drain pipe 17, the third drain pipe 18 and the fourth drain pipe 19 correspond to the four isolation areas 3 respectively. The heat exchange box 1 also includes a controller, and the gas valve, the water valve, the first temperature sensor 4, the second temperature sensor 22, the gas flow meter 24 and the air compressor 13 are all electrically connected to the controller.

[0024] One end of the first air duct 6 away from the serpentine tube 5 is fixedly connected to a filter cylinder 8, a first filter screen 9 is fixedly connected to the interior of the filter cylinder 8, and one end of the filter cylinder 8 away from the first air duct 6 is fixedly connected to a third air duct 10. The high-temperature flue gas enters the interior of the filter cylinder 8 through the third air duct 10, enters the first air duct 6 after being filtered by the first filter screen 9, and then enters the serpentine tube 5 through the first air duct 6. Cold water is injected into the interior of the heat exchange box 1 through the cold water inlet pipe 23. The water flows from the right side to the left side through the action of the five partition plates 2, and the outer surface of the filter cylinder 8 is connected to a blowing component.

[0025] The air blowing assembly includes a fifth air pipeline 12 fixedly connected to the outer surface of the filter cylinder 8, one end of the fifth air pipeline 12 away from the filter cylinder 8 is fixedly connected to an air compressor 13, and the inlet of the air compressor 13 is connected to the filter assembly.

[0026] The filter assembly includes a first filter tube connected to the inlet of the air compressor 13, one end of the first filter tube away from the air compressor 13 is fixedly connected to a filter box 14, the other side of the filter box 14 is fixedly connected to a second filter tube, the interior of the filter box 14 is fixedly connected to a second filter screen 15, the air entering the air compressor 13 is filtered by the filter assembly to avoid the introduction of dust, the lower outer surface of the filter cylinder 8 is fixedly connected to a fourth air pipeline 11, the fourth air pipeline 11 is located near the third air pipeline 10, and the fifth air pipeline 12 is located near the first air pipeline 6; air valves are installed on the first air pipeline 6, the third air pipeline 10, the fourth air pipeline 11 and the fifth air pipeline 12, and a gas flow meter 24 is provided on the first air pipeline 6.

[0027] Working principle: When in use, the high-temperature flue gas enters the interior of the filter cylinder 8 through the third air duct 10, enters the first air duct 6 after being filtered through the first filter screen 9, and then enters the serpentine pipe 5 through the first air duct 6. Cold water is injected into the interior of the heat exchange box 1 through the cold water inlet pipe 23. The water flows from the right side to the left side through the action of the five partition plates 2. Since the flue gas in the serpentine pipe 5 is continuously cooled during the transmission process, the temperature of the position of the serpentine pipe 5 close to the right side is higher. Therefore, during the flow of water from the right side to the left side, the temperature of the water flow continues to rise. The temperature in different isolation areas 3 is detected by the first temperature sensor 4. Water of different temperatures can be discharged through the first drain pipe 16, the second drain pipe 17, the third drain pipe 18 and the fourth drain pipe 19. When more water of different temperatures is needed, different distribution water pipes 20 are controlled to enter and discharge water, so that water of different temperatures enters the summary mixing pipe 21. Water of multiple temperatures can be mixed to the required water temperature. The temperature of the mixed water in the summary mixing pipe 21 is detected by the second temperature sensor 22.

[0028] When the gas flow meter 24 detects that the flow rate of the flue gas entering the first gas duct 6 is too low, first, the air valves on the third gas duct 10 and the first gas duct 6 are closed, and the air valves on the fourth gas duct 11 and the fifth gas duct 12 are opened, and then the air compressor 13 is started. The air compressor 13 delivers pressurized air into the interior of the filter cylinder 8, so that the pressurized air recoils the first filter screen 9 to remove the smoke and dust accumulated on the first filter screen 9, and the smoke and dust falls through the fourth gas duct 11.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprising a reference structure" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water temperature regulating device for a heat exchanger, comprising a heat exchange box (1), characterized in that: The inner wall of the heat exchange box (1) is fixedly connected to five partition plates (2) which are arranged in an upper and lower staggered manner. The three partition plates (2) located at the bottom divide the interior of the heat exchange box (1) into four isolation areas (3). A first temperature sensor (4) is installed inside each isolation area (3). A serpentine tube (5) is arranged inside the heat exchange box (1). One end of the serpentine tube (5) is fixedly connected to a first gas pipeline (6). The other end of the serpentine tube (5) is fixedly connected to a second gas pipeline (7). The second gas pipeline (7) extends away from one end of the serpentine tube (5) to the outside of the heat exchange box (1). The bottom of the heat exchange box (1) is connected to a first drain pipe (16), a second drain pipe (17), a third drain pipe (18) and a fourth drain pipe (19). A water distribution component is connected between the first drain pipe (16), the second drain pipe (17), the third drain pipe (18) and the fourth drain pipe (19). The water distribution assembly comprises four water distribution pipes (20), the four water distribution pipes (20) being fixedly connected to a first drainage pipe (16), a second drainage pipe (17), a third drainage pipe (18) and a fourth drainage pipe (19) respectively, and the other ends of the four water distribution pipes (20) being fixedly connected to a collective mixing pipe (21).

2. The water temperature regulating device of the heat exchanger according to claim 1, characterized in that: A second temperature sensor (22) is installed on the collecting mixing tube (21).

3. The water temperature regulating device of the heat exchanger according to claim 1, characterized in that: Water valves are installed on the first drainage pipe (16), the second drainage pipe (17), the third drainage pipe (18), the fourth drainage pipe (19), the distribution water pipe (20) and the aggregation mixing pipe (21).

4. The water temperature regulating device of the heat exchanger according to claim 2, characterized in that: A cold water inlet pipe (23) is fixedly connected to the top of the heat exchange box (1), and the cold water inlet pipe (23) corresponds to an isolation zone (3) away from the first gas pipeline (6). The first drain pipe (16), the second drain pipe (17), the third drain pipe (18) and the fourth drain pipe (19) correspond to the four isolation zones (3) respectively.

5. The water temperature regulating device of the heat exchanger according to claim 4, characterized in that: The end of the first air pipeline (6) away from the serpentine tube (5) is fixedly connected to a filter cylinder (8), the interior of the filter cylinder (8) is fixedly connected to a first filter screen (9), the end of the filter cylinder (8) away from the first air pipeline (6) is fixedly connected to a third air pipeline (10), and the outer surface of the filter cylinder (8) is connected to an air blowing assembly.

6. The water temperature regulating device of the heat exchanger according to claim 5, characterized in that: The air blowing assembly comprises a fifth air duct (12) fixedly connected to the outer surface of the filter cylinder (8), one end of the fifth air duct (12) away from the filter cylinder (8) is fixedly connected to an air compressor (13), and the inlet of the air compressor (13) is connected to the filter assembly.

7. The water temperature regulating device of the heat exchanger according to claim 6, characterized in that: The filter assembly comprises a first filter tube connected to the inlet of an air compressor (13); one end of the first filter tube away from the air compressor (13) is fixedly connected to a filter box (14); the other side of the filter box (14) is fixedly connected to a second filter tube; and the interior of the filter box (14) is fixedly connected to a second filter screen (15).

8. The water temperature regulating device of the heat exchanger according to claim 7, characterized in that: A fourth air pipeline (11) is fixedly connected to the lower outer surface of the filter cylinder (8); the fourth air pipeline (11) is located close to the third air pipeline (10); and the fifth air pipeline (12) is located close to the first air pipeline (6).

9. The water temperature regulating device of the heat exchanger according to claim 8, characterized in that: Gas valves are installed on the first gas pipeline (6), the third gas pipeline (10), the fourth gas pipeline (11) and the fifth gas pipeline (12), and a gas flow meter (24) is provided on the first gas pipeline (6).

10. The water temperature regulating device of the heat exchanger according to claim 9, characterized in that: A controller is also included, and the gas valve, water valve, first temperature sensor (4), second temperature sensor (22), gas flow meter (24) and air compressor (13) are all electrically connected to the controller.

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