Softened water heating system with heat energy recycling structure

Abstract

The invention discloses a softened water heating system with a heat energy recycling structure, which comprises a boiler, and further comprises a heating and deoxidizing device, an exhaust device and a water softening station, the heating and deoxidizing device comprises a main water tank and a plurality of auxiliary water tanks, each auxiliary water tank is connected with the main water tank through a first pipeline, and the main water tank is connected with the boiler through a second pipeline; the exhaust port of each auxiliary water tank is connected with the exhaust device through a first exhaust pipeline, the boiler is connected with the exhaust device through a second exhaust pipeline, a heat energy recovery structure is arranged in the exhaust device, the exhaust device is connected with the combustion engine through an air duct, and heating devices are arranged in the main water tank and all the auxiliary water tanks. And the soft water station is connected with each auxiliary water tank through a third pipeline. The low-temperature softened water can be independently heated, heat loss is reduced, in addition, heat in hot steam generated when the softened water is heated can be recycled, and heat energy recycling is achieved.

Description

Technical Field

[0001] The invention relates to a softened water heating system, in particular to a softened water heating system with a heat energy recovery and utilization structure. Background Art

[0002] Before the softened water enters the boiler for use, it must be heated to above 100 degrees Celsius to remove oxygen from the water. In the existing system, soft water continuously enters the water tank to mix with heated hot water, the mixed water is continuously heated in the water tank, and the water in the water tank continuously enters the boiler for use. Due to the large steam production and water consumption of the boiler, in order to ensure the water use of the boiler, the water tank for storing and heating softened water is often very large in volume. The softened water that has been heated and deoxygenated in the water tank and the cold water that has just entered the water tank are heated at the same time. In particular, a large amount of heated soft water is often stored in the water tank and is continuously heated, which leads to a large consumption of heat energy. In addition, a large amount of heat energy is not absorbed by hot water, and the flash steam discharged through the exhaust pipe is also large, resulting in serious waste of heat energy. Summary of the invention

[0003] The purpose of the present invention is to provide a softened water heating system with a heat energy recovery structure to solve the technical problems in the prior art. It can heat low-temperature softened water alone to reduce heat loss. In addition, it can recover the heat in the hot steam generated when heating softened water to achieve heat energy recovery.

[0004] The present invention provides a softened water heating system with a heat energy recovery and utilization structure, comprising a boiler, a heating and deoxygenating device, an exhaust device and a softening water station, wherein the heating and deoxygenating device comprises a main water tank and a plurality of auxiliary water tanks, each of the auxiliary water tanks being connected to the main water tank via a first pipe, the main water tank being connected to the boiler via a second pipe, exhaust ports of each of the auxiliary water tanks being connected to the exhaust device via a first exhaust pipe, the boiler being connected to the exhaust device via a second exhaust pipe, a heat energy recovery structure being arranged in the exhaust device, the exhaust device being connected to a burner via a wind pipe, a heating device being arranged in the main water tank and all of the auxiliary water tanks, and the softening water station being connected to each of the auxiliary water tanks via a third pipe.

[0005] Preferably, the volume of the auxiliary water tank is smaller than the volume of the main water tank.

[0006] Preferably, the heating device in the main water tank is a first heater, the heating device in the auxiliary water tank is a second heater, the boiler is connected to the sub-cylinder through a fourth pipe, and the sub-cylinder is respectively connected to the first heater and each of the second heaters through a fifth pipe.

[0007] Preferably, the sub-cylinder is connected to the equipment through a sixth pipe, and the condensate discharge port on the equipment is connected to the main water tank through a seventh pipe.

[0008] Preferably, the internal space of the exhaust device is divided into a smoke chamber and a fresh air chamber by a partition, the first exhaust duct and the second exhaust duct are both connected to the smoke chamber, a chimney is provided on the top of the smoke chamber, and a blower is provided on the side wall of the exhaust device, and the blower is used to blow air into the fresh air chamber.

[0009] Preferably, the heat energy recovery structure includes a first sprinkler, a second sprinkler, a first circulation pump group and a second circulation pump group, the first sprinkler is arranged at the upper part of the smoke chamber, the second sprinkler is arranged at the upper part of the fresh air chamber, the bottom of the fresh air chamber is connected to the first sprinkler through an eighth pipe, the first circulation pump group is arranged on the eighth pipe, the bottom of the smoke chamber is connected to the second sprinkler through a ninth pipe, the second circulation pump group is arranged on the ninth pipe, and one end of the wind tube is connected to the top of the fresh air chamber.

[0010] Preferably, water baffles are provided on the tops of the smoke chamber and the fresh air chamber.

[0011] Preferably, an induced draft fan is provided at the lower end of the chimney.

[0012] Preferably, the smoke chamber is connected to the soft water station through a tenth pipeline.

[0013] Compared with the prior art, the present invention changes the traditional water tank heating method, sets up multiple auxiliary water tanks, heats the softened water in the auxiliary water tanks, removes the oxygen in the softened water, and heats only the cold water entering the auxiliary water tanks. The more auxiliary water tanks are set, the more efficient this heating method is. The softened water that has been heated and deoxygenated enters the main water tank, and the softened water in the main water tank is no longer heated, thus avoiding repeated heating and deoxygenation of the softened water that has been heated and deoxygenated.

[0014] The flash steam generated by heating the auxiliary water tank of the present invention and the high-temperature steam generated by the operation of the boiler enter the exhaust device, where the heat energy is recovered by a heat energy recovery structure and sent to the burner to be mixed with fuel for combustion to provide steam for the boiler, thereby realizing the recovery and utilization of heat energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Explanation of the accompanying drawings: boiler 1, heating and deoxygenation device 2, exhaust device 3, main water tank 4, auxiliary water tank 5, first pipeline 6, second pipeline 7, first exhaust pipeline 8, second exhaust pipeline 9, air duct 10, burner 11, soft water station 12, third pipeline 13, first heater 14, second heater 15, fourth pipeline 16, sub-cylinder 17, fifth pipeline 18, sixth pipeline 19, equipment 20, seventh pipeline 21, partition 22, smoke chamber 23, fresh air chamber 24, chimney 25, blower 26, first sprinkler 27, second sprinkler 28, first circulation pump group 29, second circulation pump group 30, eighth pipeline 31, ninth pipeline 32, water baffle 33, induced draft fan 34, tenth pipeline 35, first pump group 36, first butterfly valve 37, second butterfly valve 38, second pump group 39. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0018] Embodiments of the present invention: Figure 1 As shown, a softened water heating system with a heat energy recovery and utilization structure includes a boiler 1, a heating and deoxygenating device 2, an exhaust device 3 and a softening water station 12. The heating and deoxygenating device 2 includes a main water tank 4 and multiple auxiliary water tanks 5. Each auxiliary water tank 5 is connected to the main water tank 4 through a first pipe 6, the main water tank 4 is connected to the boiler 1 through a second pipe 7, the exhaust ports of each auxiliary water tank 5 are connected to the exhaust device 3 through a first exhaust pipe 8, the boiler 1 is connected to the exhaust device 3 through a second exhaust pipe 9, a heat energy recovery structure is provided in the exhaust device 3, the exhaust device 3 is connected to a burner 11 through a wind pipe 10, heating devices are provided in the main water tank 4 and all the auxiliary water tanks 5, and the softening water station 12 is connected to each auxiliary water tank 5 through a third pipe 13.

[0019] The burner 11 heats the softened water in the boiler 1 by burning fuel so that the boiler 1 generates high-temperature steam. The high-temperature steam of the boiler 1 is used for heating the device and for various equipment requiring high-temperature steam.

[0020] The soft water station 12 is a prior art, and is used to soften tap water into softened water. The softened water is heated and deoxygenated in the auxiliary water tank 5, and is discharged into the main water tank 4 after the oxygen is removed and the temperature is raised to a preset value. When the boiler 1 needs it, the main water tank 4 provides the deoxygenated softened water to the boiler 1.

[0021] The present invention arranges multiple auxiliary water tanks 5 in front of the main water tank 4. The volume of the auxiliary water tanks 5 is smaller than that of the main water tank 4. The smaller the volume of the auxiliary water tank 5, the faster the heating speed. The more the number of auxiliary water tanks 5, the higher the heating efficiency. Therefore, the number of auxiliary water tanks 5 can be set according to actual needs. In this embodiment, three auxiliary water tanks 5 are set as an example for explanation.

[0022] Specifically, the heating device in the main water tank 4 is the first heater 14, the heating device in the auxiliary water tank 5 is the second heater 15, the boiler 1 is connected to the sub-cylinder 17 through the fourth pipe 16, and the sub-cylinder 17 is respectively connected to the first heater 14 and each second heater 15 through the fifth pipe 18.

[0023] The gas cylinder 17 is a prior art. The gas cylinder 17 is used to divide the steam generated by the boiler 1 into multiple parts and send them to different devices. Valves are provided on the fourth pipe 16 and the fifth pipe 18. The structures of all the auxiliary water tanks 5 are exactly the same. Each auxiliary water tank 5 is installed with a liquid level sensor and a temperature sensor. The third pipe 13 is provided with a first pump group 36. The softened water generated by the soft water station 12 is pumped into each auxiliary water tank 5 through the first pump group 36. The steam generated by the boiler 1 enters the gas cylinder 17 through the fourth pipe 16, and then enters the first heater 14 and each second heater 15 through the fifth pipe 18. The softened water is heated and deoxygenated by the first heater 14 and the second heater 15. The air inlet end of the first heater 14 and each second heater 15 is provided with an electric valve. By controlling the electric valve, the steam can be controlled to enter a certain heater or enter multiple heaters at the same time or enter all heaters at the same time.

[0024] Furthermore, the sub-cylinder 17 is connected to the device 20 through the sixth pipe 19, and the condensate discharge port on the device 20 is connected to the main water tank 4 through the seventh pipe 21. Valves are provided on the sixth pipe 19 and the seventh pipe 21.

[0025] Equipment 20 is a device that requires the use of steam in the prior art. Steam will produce condensed water in the equipment 20. Since the steam is relatively pure, does not contain oxygen, and has a high temperature, it can directly enter the main water tank 4 through the seventh pipe 21 without the need for further heating and deoxygenation, thereby realizing the recycling of the condensed water.

[0026] Furthermore, the internal space of the exhaust device 3 is divided into a smoke chamber 23 and a fresh air chamber 24 by a partition 22. The first exhaust duct 8 and the second exhaust duct 9 are both connected to the smoke chamber 23. A chimney 25 is provided on the top of the smoke chamber 23. A draft fan 34 is provided at the lower end of the chimney 25. A blower 26 is provided on the side wall of the exhaust device 3, and the blower 26 is used to blow air into the fresh air chamber 24.

[0027] The high-temperature gas generated by the boiler 1 and the heating and deoxidizing device 2 is introduced into the smoke chamber 23, and the heat energy is recovered and utilized by the heat energy recovery structure in the smoke chamber 23, which plays a role in energy saving. Moreover, the exhaust is uniformly discharged through the same chimney 25, which effectively optimizes the structural design.

[0028] Furthermore, the heat energy recovery structure includes a first sprinkler 27, a second sprinkler 28, a first circulation pump group 29 and a second circulation pump group 30. The first sprinkler 27 is arranged at the upper part of the smoke chamber 23, and the connection positions of the first exhaust duct 8 and the second exhaust duct 9 with the exhaust device 3 are both located below the first sprinkler 27; the second sprinkler 28 is arranged at the upper part of the fresh air chamber 24, and the bottom of the fresh air chamber 24 is connected to the first sprinkler 27 through an eighth pipe 31. The first circulation pump group 29 is arranged on the eighth pipe 31, and the bottom of the smoke chamber 23 is connected to the second sprinkler 28 through a ninth pipe 32. The second circulation pump group 30 is arranged on the ninth pipe 32. One end of the wind tube 10 is connected to the top of the fresh air chamber 24, and the tops of the smoke chamber 23 and the fresh air chamber 24 are both provided with water baffles 33.

[0029] The second exhaust pipe 9 is provided with a first butterfly valve 37, and the flue gas generated by the boiler 1 enters the smoke chamber 23 through the first butterfly valve 37 and the second exhaust pipe 9, while the flash steam generated by the auxiliary water tank 5 of the heating deaerator 2 and the discharged oxygen-containing gas also enter the smoke chamber 23 through the first exhaust pipe 8 at the top.

[0030] The low-temperature water at the bottom of the fresh air chamber 24 continuously enters the first sprayer 27 through the first circulation pump group 29 and the eighth pipeline 31 to spray water into the smoke chamber 23. The water sprayed in the smoke chamber 23 absorbs the heat of the flue gas discharged by the boiler and the oxygen-containing flash steam discharged by the heating and deoxygenating device 2. The sprayed water after absorbing heat and heating falls into the bottom of the smoke chamber 23. The flue gas after cooling passes through the water baffle 33 and is discharged to the outside through the chimney 25 under the action of the induced draft fan 34. Due to the exhaust effect of the induced draft fan 34 and the chimney effect of the chimney 25, a negative pressure is formed in the smoke chamber 23, which facilitates the flash steam of each auxiliary water tank 5 and the main water tank 4 in the boiler 1 and the heating and deoxygenating device 2 to be discharged into the smoke chamber 23, and uniformly discharged to the outside through the chimney 25 after absorbing heat.

[0031] The hot water falling into the bottom of the smoke chamber 23 can enter the second sprayer 28 through the ninth pipe 32 under the action of the second circulation pump group 30 to spray the hot water into the fresh air chamber 24. The hot water in the fresh air chamber 24 exchanges heat with the normal temperature fresh air blown in by the blower 26. The fresh air absorbs the heat of the sprayed hot water and heats up. After passing through the water baffle 33, the air cylinder 10, the second butterfly valve 38, and the burner 11, it is mixed with the fuel and burned to produce steam for the boiler 1. The water after being absorbed and cooled by the fresh air falls into the bottom of the fresh air chamber 24, and the cycle is repeated and operated continuously, so that the flash steam discharged by the heating and deoxygenation device 2 and the flue gas heat energy discharged by the boiler 1 are uniformly absorbed and utilized, and uniformly discharged, and the heat energy is effectively recovered and utilized.

[0032] The smoke chamber 23 is connected to the soft water station 12 through the tenth pipe 35. When there is too much water in the smoke chamber 23, it can flow into the soft water station 12 through the tenth pipe 35 to be re-prepared into soft water for use by the heating and deoxygenation device 2.

[0033] The working principle of the present invention is as follows: when working, the soft water station 12 is responsible for preparing soft water. The softened water produced by the soft water station 12 enters the three auxiliary water tanks 5 through the third pipe 13. The inlet ends of the three auxiliary water tanks 5 are all provided with electric valves. By controlling the electric valves at the inlet ends of the auxiliary water tanks 5, it is possible to control whether the softened water enters the auxiliary water tanks 5.

[0034] When the water consumption of the boiler 1 is large, the softened water can enter the three auxiliary water tanks 5 for heating at the same time. At the same time, the steam generated by the boiler 1 enters the sub-cylinder 17 through the fourth pipe 16, and part of the steam in the sub-cylinder 17 enters the second heaters 15 in the three auxiliary water tanks 5 through the fifth pipe 18, and the softened water is heated and deoxygenated by the second heater 15.

[0035] When the softened water in the auxiliary water tank 5 is heated to the set temperature and deoxygenated, the electric valve at its inlet end is closed and the electric valve on the corresponding branch of the second heater 15 on the fifth pipe 18 is closed, so that the auxiliary water tank 5 stops taking in water and the second heater 15 stops heating. At the same time, the electric valve on the first pipe 6 is opened, so that the softened water heated and deoxygenated in the auxiliary water tank 5 flows into the main water tank 4 for temporary storage. This avoids the traditional problem of mixing cold water and heated hot water, resulting in repeated heating and heat energy waste.

[0036] When the amount of softened water used in the boiler is small, the softened water can also alternately enter the three auxiliary water tanks 5 for heating and deoxygenation, that is, the softened water can first enter the first auxiliary water tank 5 for heating and deoxygenation. When the temperature of the softened water in the first auxiliary water tank 5 reaches the set temperature, the electric valve at its inlet end and the electric valve at the inlet end of the second heater 15 inside it are closed, the electric valve on the first pipeline 6 is opened, and the hot soft water in the first auxiliary water tank 5 enters the main water tank 4; at this time, the soft water enters the second auxiliary water tank 5 for heating and deoxygenation. When the temperature of the softened water in the second auxiliary water tank 5 reaches the set temperature, the same operation as the first auxiliary water tank 5 is performed to discharge the softened water inside the third auxiliary water tank 5 into the main water tank 4; thereafter, the electric valve at the inlet end of the third auxiliary water tank 5 is opened, and the softened water enters the third auxiliary water tank 5 for heating and deoxygenation. When the temperature of the softened water in the third auxiliary water tank 5 reaches the set temperature, the same operation as the first auxiliary water tank 5 is performed to discharge the softened water inside the third auxiliary water tank 5 into the main water tank 4.

[0037] A second pump group 39 is provided on the second pipeline 7. Under the action of the second pump group 39, the hot softened water in the main water tank 4 is sent to the boiler 1 through the second pipeline 7 for use. When the production is stopped for a long time or the boiler is started for the first time or there is a fault in the heater in the auxiliary water tank 5, and the water oxygen content in the main water tank 4 is unqualified, the electric valve at the inlet end of the first heater 14 is opened to allow steam to enter the first heater 14, and the softened water in the main water tank 4 is heated by the first heater 14, thereby preventing unqualified softened water from entering the boiler 1.

[0038] The flue gas generated by the boiler 1 enters the smoke chamber 23 of the exhaust device 3 through the first butterfly valve 37 and the second exhaust pipe 9, and the flash steam and the discharged oxygen-containing gas generated when the three auxiliary water tanks 5 heat the softened water also enter the smoke chamber 23 through the top first exhaust pipe 8. The heat energy recovery process of the flue gas, flash steam and oxygen-containing gas in the exhaust device 3 has been specifically introduced above and will not be repeated here.

[0039] It should be noted that when the production is stopped for a long time or the boiler is used for the first time or the second heater 15 in the auxiliary water tank 5 fails, and the water oxygen content in the main water tank 4 is unqualified, the first heater 14 needs to be used to heat and deoxygenate the softened water. At this time, the flash steam and oxygen-containing gas generated in the main water tank 4 can be discharged through a certain auxiliary water tank 5. That is, when the auxiliary water tank 5 is not heated, the electric valve at the inlet end of the auxiliary water tank 5 is closed, and the electric valve on the first pipe 6 at the bottom of the auxiliary water tank 5 is opened. After the softened water in the auxiliary water tank 5 enters the main water tank 4, the flash steam in the main water tank 4 can enter the auxiliary water tank 5 through the first pipe 6, and then enter the smoke chamber 23 along the first exhaust pipe 8 at the top of the auxiliary water tank 5.

[0040] Even if the electric valve at the inlet end of the auxiliary water tank 5 is in an open state, the auxiliary water tank 5 continues to enter softened water at room temperature. As long as the second heater 15 in the auxiliary water tank 5 does not work, the flash steam in the main water tank 4 will be absorbed by the auxiliary water tank 5 and the water flowing in the pipeline, and the discharged oxygen-containing gas can still enter the auxiliary water tank 5 and finally enter the smoke chamber 40.

[0041] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A softened water heating system with a heat energy recovery structure, comprising a boiler (1), characterized in that: The invention also comprises a heating and deoxygenating device (2), an exhaust device (3) and a soft water station (12). The heating and deoxygenating device (2) comprises a main water tank (4) and a plurality of auxiliary water tanks (5). Each of the auxiliary water tanks (5) is connected to the main water tank (4) via a first pipe (6). The main water tank (4) is connected to the boiler (1) via a second pipe (7). The exhaust ports of each of the auxiliary water tanks (5) are connected to the exhaust device (3) via a first exhaust pipe (8). The boiler (1) is connected to the exhaust device (3) via a second exhaust pipe (9). A heat recovery structure is provided in the exhaust device (3). The exhaust device (3) is connected to a burner (11) via a wind tube (10). A heating device is provided in the main water tank (4) and all of the auxiliary water tanks (5). The soft water station (12) is connected to each of the auxiliary water tanks (5) via a third pipe (13).

2. The softened water heating system with heat recovery and utilization structure according to claim 1 is characterized in that: The volume of the auxiliary water tank (5) is smaller than the volume of the main water tank (4).

3. The softened water heating system with heat energy recovery and utilization structure according to claim 1 is characterized in that: The heating device in the main water tank (4) is a first heater (14), the heating device in the auxiliary water tank (5) is a second heater (15), the boiler (1) is connected to the sub-cylinder (17) via a fourth pipe (16), and the sub-cylinder (17) is respectively connected to the first heater (14) and each of the second heaters (15) via a fifth pipe (18).

4. The softened water heating system with heat energy recovery and utilization structure according to claim 3 is characterized in that: The sub-cylinder (17) is connected to the device (20) via a sixth pipe (19), and the condensate discharge port on the device (20) is connected to the main water tank (4) via a seventh pipe (21).

5. The softened water heating system with heat energy recovery and utilization structure according to any one of claims 1 to 4, characterized in that: The internal space of the exhaust device (3) is divided into a smoke chamber (23) and a fresh air chamber (24) by a partition (22); the first exhaust duct (8) and the second exhaust duct (9) are both connected to the smoke chamber (23); a chimney (25) is provided at the top of the smoke chamber (23); a blower (26) is provided on the side wall of the exhaust device (3); the blower (26) is used to blow air into the fresh air chamber (24).

6. The softened water heating system with heat energy recovery and utilization structure according to claim 5, characterized in that: The heat energy recovery structure comprises a first sprayer (27), a second sprayer (28), a first circulation pump group (29) and a second circulation pump group (30); the first sprayer (27) is arranged at an upper portion of the smoke chamber (23); the second sprayer (28) is arranged at an upper portion of the fresh air chamber (24); the bottom of the fresh air chamber (24) is connected to the first sprayer (27) via an eighth pipe (31); the first circulation pump group (29) is arranged on the eighth pipe (31); the bottom of the smoke chamber (23) is connected to the second sprayer (28) via a ninth pipe (32); the second circulation pump group (30) is arranged on the ninth pipe (32); and one end of the air duct (10) is connected to the top of the fresh air chamber (24).

7. The softened water heating system with heat energy recovery and utilization structure according to claim 6 is characterized in that: Water baffles (33) are provided at the tops of the smoke chamber (23) and the fresh air chamber (24).

8. The softened water heating system with heat energy recovery and utilization structure according to claim 7, characterized in that: An induced draft fan (34) is provided at the lower end of the chimney (25).

9. The softened water heating system with heat energy recovery and utilization structure according to claim 8, characterized in that: The smoke chamber (23) is connected to the soft water station (12) via a tenth pipeline (35).

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