A boiler make-up water device

Abstract

The utility model discloses a kind of boiler make-up water device, it is related to boiler make-up water technical field, the device includes frame, the electric control cabinet of setting in frame one side and the water inlet pipe of setting in frame other side, multiple electric deionization equipment and water production pipe;Heat exchanger is further provided in the frame, the one side of the heat exchanger is provided with concentrated water pipe, the one side of the concentrated water pipe is connected with first return pipe, the second return pipe is connected on the water production pipe, the heat exchanger is connected with first return pipe and second return pipe respectively and carries out heat exchange.This utility model exchanges heat between waste heat in concentrated water and water production by heat exchanger, transfers heat to water production, as boiler make-up water, avoid waste of waste heat in concentrated water, then part of concentrated water is mixed with inlet water and obtained water production after being treated by electric deionization equipment, water production is discharged as boiler make-up water by water production pipe, can effectively improve the recovery rate of concentrated water, can reduce the waste of water resources.

Description

Technical Field

[0001] This utility model relates to the field of boiler feedwater technology, specifically a boiler feedwater device. Background Technology

[0002] In thermal power plants, boiler feedwater requires strict treatment to ensure that the water quality meets the operating requirements of high-pressure boilers. Traditional boiler feedwater treatment systems typically employ a "pretreatment + reverse osmosis + ion exchange" process, but this has the following problems: The concentrate discharged from the reverse osmosis system still contains a large amount of waste heat and accounts for 25-50% of the total concentrate feed water. Traditional processes directly discharge it, resulting in the waste of water resources and heat. Therefore, a boiler feed water device is proposed to solve the existing problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a boiler feedwater device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a boiler feedwater device, comprising a frame, an electrical control cabinet disposed on one side of the frame, a water inlet pipe disposed on the other side of the frame, multiple electro-deionization devices, and a water production pipe; A heat exchanger is also provided within the frame. A concentrate pipe is provided on one side of the heat exchanger. A first return pipe is connected to one side of the concentrate pipe. A second return pipe is connected to the product water pipe. The heat exchanger is connected to the first return pipe and the second return pipe respectively for heat exchange. One end of each of the multiple electro-deionization devices is connected to the inlet water pipe, and the other end of the electro-deionization device is connected to the product water pipe and the concentrate pipe.

[0005] In a preferred embodiment of this utility model, the water inlet pipe includes multiple interconnected first branch pipes and an inlet pipe, and the bottom end of the concentrate pipe is connected to multiple second branch pipes. The first branch pipes and the second branch pipes are connected to each electro-deionization device through a T-junction.

[0006] In a preferred embodiment of this utility model, the end of the three-way pipe connected to the electro-deionization device is connected to a first ball valve, the end of the three-way pipe connected to the first diverter pipe is connected to a first flow meter, and the end of the three-way pipe connected to the second diverter pipe is connected to a first check valve.

[0007] In a preferred embodiment of this utility model, a second check valve is connected to the upper end of the concentrate pipe, a second ball valve is connected to the lower end of the concentrate pipe, and a second flow meter is connected between the concentrate pipe and the return pipe and the second ball valve.

[0008] In a preferred embodiment of this utility model, the water production pipe includes multiple interconnected manifolds and two outlet pipes, the electro-deionization device is connected to the manifolds, and the two ends of the second return pipe are respectively connected to the two manifolds.

[0009] In a preferred embodiment of this utility model, a third check valve is provided on the manifold, which is located at one end near the outlet pipe, and the manifold is connected to the electro-deionization device through a pipe and a third ball valve.

[0010] In a preferred embodiment of this utility model, the electro-deionization device is arranged in four rows, with 2-10 devices in each row.

[0011] In a preferred embodiment of this utility model, the number of the first diversion pipe, the second diversion pipe, and the collector pipe is four.

[0012] In a preferred embodiment of this utility model, the number of connectors on the first shunt pipe, the second shunt pipe, and the collector pipe is the same as the number of a row of electro-deionization devices.

[0013] In a preferred embodiment of this utility model, the electrical control cabinet is electrically connected to the electro-deionization equipment and various valves, and is used to control the on / off state of the electro-deionization equipment and pipelines.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention uses a heat exchanger to exchange the residual heat in the concentrate with the product water, transferring heat to the product water for use as boiler feedwater, thus avoiding the waste of residual heat in the concentrate. Then, a portion of the concentrate is mixed with the feed water and treated by an electro-deionization device to obtain product water, which is discharged through a product water pipe as boiler feedwater. This effectively improves the recovery rate of concentrate and reduces the waste of water resources. Attached Figure Description

[0015] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a side view of the structure of this utility model; Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a top view of the structure of this utility model.

[0016] In the diagram: 1. Frame; 2. Electrical control cabinet; 3. Inlet pipe; 301. First branch pipe; 302. Inlet pipe; 4. Electro-deionization equipment; 5. Product water pipe; 501. Second return pipe; 502. Combination pipe; 503. Outlet pipe; 504. Third check valve; 505. Third ball valve; 6. Heat exchanger; 7. Concentrate pipe; 701. First return pipe; 702. Second branch pipe; 703. Second check valve; 704. Second ball valve; 705. Second flow meter; 8. T-junction; 801. First ball valve; 802. First flow meter; 803. First check valve. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] Please see Figures 1-4 This utility model provides a technical solution: a boiler feedwater device, including a frame 1, an electrical control cabinet 2 set on one side of the frame 1 and a water inlet pipe 3 set on the other side of the frame 1, multiple electro-deionization devices 4 and a water production pipe 5. Specifically, the electrical control cabinet 2 is electrically connected to the electro-deionization devices 4 and each valve, and the valves on the pipeline are all electric valves used to control the on / off of the electro-deionization devices 4 and the pipeline. A heat exchanger 6 is also installed inside the frame 1. A concentrated water pipe 7 is installed on one side of the heat exchanger 6. A first return pipe 701 is connected to one side of the concentrated water pipe 7. A second return pipe 501 is connected to the product water pipe 5. The heat exchanger 6 is connected to the first return pipe 701 and the second return pipe 501 respectively for heat exchange. The waste heat in the concentrated water is exchanged with the product water through the heat exchanger 6, and the heat is transferred to the product water as boiler feed water, so as to avoid the waste of waste heat in the concentrated water. One end of multiple electro-deionization devices 4 is connected to the inlet water pipe 3, and the other end of the electro-deionization devices 4 is connected to the product water pipe 5 and the concentrate pipe 7.

[0019] In this embodiment, the inlet pipe 3 includes multiple interconnected first branch pipes 301 and an inlet pipe 302. The bottom end of the concentrate pipe 7 is connected to multiple second branch pipes 702. The first branch pipes 301 and the second branch pipes 702 are connected to each electro-deionization device 4 through a three-way pipe 8. Water enters through the inlet pipe 302 of the inlet pipe 3, and then enters the three-way pipe 8 through the first branch pipes 301. Part of the concentrate in the concentrate pipe 7 enters the three-way pipe 8 through the second branch pipes 702 to mix with the inlet water, and then enters the electro-deionization device 4 for treatment. The concentrate accounts for 20%-30% of the total mixed inlet water volume. One end of the three-way pipe 8 is connected to the electro-deionization device 4 and is connected to the first ball valve 801. The other end of the three-way pipe 8 is connected to the first diversion pipe 301 and is connected to the first flow meter 802. The total flow rate of the incoming water is monitored by the first flow meter 802. The other end of the three-way pipe 8 is connected to the second diversion pipe 702 and is connected to the first check valve 803. It should be noted that mixing some of the concentrated water with the feed water and then treating it in the electro-deionization equipment 4 as boiler feed water can effectively improve the recovery rate of the concentrated water and reduce the waste of water resources.

[0020] In this embodiment, a second check valve 703 is connected to the upper end of the concentrate pipe 7, a second ball valve 704 is connected to the lower end of the concentrate pipe 7, and a second flow meter 705 is connected between the concentrate pipe 7 and the return pipe and the second ball valve 704 to monitor the total flow rate of the concentrate.

[0021] In this embodiment, the water production pipe 5 includes multiple interconnected manifolds 502 and two outlet pipes 503. The electro-deionization device 4 is connected to the manifolds 502, and the two ends of the second return pipe 501 are respectively connected to the two manifolds 502. The manifold 502 is equipped with a third check valve 504, which is located at one end near the outlet pipe 503. The manifold 502 is connected to the electro-deionization device 4 through a pipe and a third ball valve 505. It should be noted that some of the concentrate is mixed with the feed water and treated by the electro-deionization equipment 4 to obtain product water. The product water is discharged through the collector pipe 502 into the outlet pipe 503 as boiler feed water.

[0022] In this embodiment, the electro-deionization device 4 is arranged in four rows, with 2-10 devices in each row. Specifically, the electro-deionization device 4 is a membrane-free electro-deionization water treatment device, model MF-3. The electro-deionization device 4 is mainly used for the preparation of high-purity water and is the core desalination device for systems such as boiler feedwater, electronic ultrapure water, and pharmaceutical water. The number of the first branch pipe 301, the second branch pipe 702, and the collecting pipe 502 is 4. The number of connectors on the first branch pipe 301, the second branch pipe 702, and the collecting pipe 502 is the same as the number of devices in one row of the electro-deionization device 4.

[0023] In practical use, water enters through the inlet pipe 302 of the inlet pipe 3, and is then diverted into the three-way pipe 8 via four first diversion pipes 301. The inlet flow rate is monitored by a first flow meter 802. Concentrate is connected to the top of the concentrate pipe 7, and diverted into the three-way pipe 8 via a second diversion pipe 702. A first check valve 803 controls the flow between the concentrate and the three-way pipe 8 and prevents backflow of the concentrate. Part of the concentrate is mixed with the inlet water and introduced into the electro-deionization device 4. A first ball valve 801 controls the flow at the inlet of the electro-deionization device 4. The device then undergoes desalination treatment to remove Na⁺ and Cl⁻. Ions such as SiO2 are extracted from the water to obtain product water. The product water is collected in the outlet pipe 503 through the manifold 502. The opening and closing of the manifold 502 is controlled by the third check valve 504 to prevent the product water from flowing back. Part of the product water then enters the heat exchanger 6 through the second return pipe 501. Part of the concentrate from the concentrate pipe 7 enters the heat exchanger 6 through the first return pipe 701. The heat exchanger 6 exchanges the residual heat in the concentrate with the product water, transferring heat to the product water for use as boiler feed water, thus avoiding the waste of residual heat in the concentrate. The product water is then discharged through the outlet pipe 503 of the product water pipe 5 as boiler water.

[0024] It should be noted that the above embodiments are merely preferred embodiments of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. A boiler feedwater device, characterized in that: It includes a frame (1), an electrical control cabinet (2) set on one side of the frame (1), an inlet pipe (3) set on the other side of the frame (1), multiple electro-deionization devices (4), and a product water pipe (5). A heat exchanger (6) is also provided inside the frame (1). A concentrate pipe (7) is provided on one side of the heat exchanger (6). A first return pipe (701) is connected to one side of the concentrate pipe (7). A second return pipe (501) is connected to the product water pipe (5). The heat exchanger (6) is connected to the first return pipe (701) and the second return pipe (501) respectively for heat exchange. One end of each of the multiple electro-deionization devices (4) is connected to the inlet water pipe (3), and the other end of the electro-deionization device (4) is connected to the product water pipe (5) and the concentrate pipe (7).

2. A boiler feedwater device according to claim 1, characterized in that: The inlet pipe (3) includes multiple first branch pipes (301) connected to each other and an inlet pipe (302). The bottom end of the concentrate pipe (7) is connected to multiple second branch pipes (702). The first branch pipes (301) and the second branch pipes (702) are connected to each electro-deionization device (4) through a three-way pipe (8).

3. A boiler feedwater device according to claim 2, characterized in that: The end of the three-way pipe (8) connected to the electro-deionization device (4) is connected to a first ball valve (801), the end of the three-way pipe (8) connected to the first diverter pipe (301) is connected to a first flow meter (802), and the end of the three-way pipe (8) connected to the second diverter pipe (702) is connected to a first check valve (803).

4. A boiler feedwater device according to claim 3, characterized in that: The upper end of the concentrate pipe (7) is connected to a second check valve (703), the lower end of the concentrate pipe (7) is connected to a second ball valve (704), and the concentrate pipe (7) is located between the return pipe and the second ball valve (704) and a second flow meter (705).

5. A boiler feedwater device according to claim 4, characterized in that: The water production pipe (5) includes multiple interconnected manifolds (502) and two outlet pipes (503). The electro-deionization device (4) is connected to the manifolds (502), and the two ends of the second return pipe (501) are respectively connected to the two manifolds (502).

6. A boiler feedwater device according to claim 5, characterized in that: A third check valve (504) is provided on the manifold (502). The third check valve (504) is located at one end near the outlet pipe (503). The manifold (502) is connected to the electro-deionization device (4) through a pipe and a third ball valve (505).

7. A boiler feedwater device according to claim 6, characterized in that: The electro-deionization device (4) is arranged in four rows, with 2-10 units in each row.

8. A boiler feedwater device according to claim 7, characterized in that: The number of the first shunt pipe (301), the second shunt pipe (702), and the collector pipe (502) is four.

9. A boiler feedwater device according to claim 7, characterized in that: The number of connectors on the first shunt tube (301), the second shunt tube (702), and the collector tube (502) is the same as the number of a row of electro-deionization devices (4).

10. A boiler feedwater device according to claim 7, characterized in that: The electrical control cabinet (2) is electrically connected to the electro-deionization equipment (4) and various valves, and is used to control the on / off state of the electro-deionization equipment (4) and pipelines.

Images