Water quality optimization system for gas-fired boiler

Abstract

The utility model relates to a water purification system, and provides a gas-fired boiler water quality optimization system which comprises an ammonia water tank, a softened water tank, a desalter, a deaerator and a boiler which are connected in sequence. The water quality optimization system for the gas-fired boiler can effectively optimize the water quality of the boiler.

Description

Technical Field

[0001] This utility model relates to the technical field of water purification systems, and more specifically, to a water quality optimization system for a gas-fired boiler. Background Technology

[0002] At present, most enterprises use steam, and gas boilers are now common. However, water quality has a great impact on boilers during use. It not only affects the quality of steam, but also reduces the service life of the equipment. Boilers with poor water quality will also increase heat loss through large amounts of blowdown.

[0003] The existing boilers mostly use softened water for feed, which contains too much bicarbonate, making the boiler water and steam alkaline, and the condensate becomes acidic after use in the workshop. After the feed water is deaerated in the deaerator, the steam is vented and wasted, and the specific water quality needs to be sampled and analyzed. The boiler water quality cannot be monitored, and personnel still need to perform boiler blowdown based on the water quality analysis, which increases the amount of wastewater discharged to the sewage treatment plant. Utility Model Content

[0004] The purpose of this invention is to provide a gas-fired boiler water quality optimization system that can effectively optimize boiler water quality.

[0005] This utility model is achieved through the following technical solution: The gas boiler water quality optimization system of this utility model includes an ammonia tank, a soft water tank, a desalination unit, a deaerator, and a boiler connected in sequence.

[0006] Furthermore, the desalination unit is equipped with a heat exchanger, which is connected to the steam outlet of the deaerator.

[0007] Furthermore, an ammonia pump is provided between the ammonia tank and the soft water tank.

[0008] Furthermore, a first pH meter is provided at the inlet end of the boiler, and the first pH meter is connected to the ammonia pump.

[0009] Furthermore, the boiler is connected to a sewage tank via a drain valve.

[0010] Furthermore, the boiler is connected to a second pH meter and a conductivity meter; both the second pH meter and the conductivity meter are connected to the drain valve.

[0011] Furthermore, the boiler is provided with a flue gas duct, an air preheater is provided in the flue gas duct, the air preheater is connected to a blower, and the air outlet of the blower is connected to the boiler.

[0012] The technical solution of this utility model has at least the following advantages and beneficial effects: The gas boiler water quality optimization system of this utility model sends softened water into a soft water tank. Ammonia water from the ammonia water tank is pumped into the soft water tank and mixed with the soft water to neutralize the bicarbonate ions in the soft water, making the softened water neutral. The neutralized softened water enters the desalination unit for desalination. After desalination, it enters the deaerator to remove oxygen from the water. Finally, it enters the boiler to be heated into steam. The water after neutralization by ammonia water and desalination by the desalination unit has higher purity, significantly reducing the wear and tear on the boiler equipment. Furthermore, the water condensed after the boiler steam is used can be better reused. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the structure of the gas-fired boiler water quality optimization system provided in this embodiment of the utility model.

[0015] Icons: 1-Ammonia tank, 2-Soft water tank, 3-Desalinator, 4-Deaerator, 5-Boiler, 6-Flue gas exhaust duct, 7-Air preheater, 8-Blower, 9-Sewage tank, 10-Ammonia pump. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example

[0022] The following description, in conjunction with specific embodiments, further illustrates the point, as shown in the appendix. Figure 1 As shown, the gas-fired boiler water quality optimization system of this embodiment includes an ammonia tank 1, a soft water tank 2, a desalination unit 3, a deaerator 4, and a boiler 5 connected in sequence. Specifically, softened water is sent to the soft water tank 2. The ammonia pump 10 in the ammonia tank 1 pumps the ammonia into the soft water tank 2 and mixes with the softened water to neutralize the bicarbonate ions in the soft water, making the softened water neutral. The neutralized softened water enters the desalination unit 3 for desalination. After desalination, it enters the deaerator 4 to remove oxygen from the water. Finally, it enters the boiler 5 and is heated into steam. The water after neutralization by ammonia and desalination by the desalination unit 3 has higher purity, significantly reducing the wear and tear on the boiler 5 equipment. Furthermore, the water condensed after the steam in the boiler 5 is utilized can be better reused.

[0023] In this embodiment, the desalination unit 3 is equipped with a heat exchanger, which is connected to the steam outlet of the deaerator 4. Specifically, the deaerator 4 can be a swirl film deaerator 4, which requires high-temperature steam during operation. The high-temperature steam after passing through the deaerator 4 enters the heat exchanger in the desalination unit 3 to preheat the water in the desalination unit 3, enabling faster deoxygenation when it enters the deaerator 4 and reducing steam energy consumption. The desalination unit 3 can be a commercially available finished device, such as the "Demineralized Water Equipment System" from Keda Environmental Protection Technology (Shenzhen) Co., Ltd. The heat exchanger is mainly used to heat the water after desalination in the desalination unit.

[0024] In this embodiment, an ammonia pump 10 is installed between the ammonia tank 1 and the soft water tank 2. A first pH meter is installed at the inlet end of the boiler 5, and the first pH meter is connected to the ammonia pump 10. Specifically, the pH of the water before entering the boiler 5 is monitored in real time by the first pH meter, which facilitates real-time control of the amount of ammonia pump 10 delivers to the soft water tank 2.

[0025] In this embodiment, boiler 5 is connected to wastewater tank 9 via a blowdown valve. Boiler 5 is connected to a second pH meter and a conductivity meter; both the second pH meter and the conductivity meter are connected to the blowdown valve. Specifically, the water quality inside boiler 5 can be monitored in real time using the second pH meter and the conductivity meter. When one of the values ​​reaches the discharge level, the wastewater in boiler 5 can be discharged.

[0026] In this embodiment, the boiler 5 is provided with a flue gas passage 6, and an air preheater 7 is provided in the flue gas passage 6. The air preheater 7 is connected to a blower 8, and the air outlet of the blower 8 is connected to the boiler 5.

[0027] In summary, the gas-fired boiler water quality optimization system of this embodiment delivers softened water into the softened water tank 2. The ammonia pump 10 in the ammonia tank 1 pumps the ammonia into the softened water tank 2 and mixes with the softened water to neutralize the bicarbonate ions in the softened water, making the softened water neutral. The neutralized softened water then enters the desalination unit 3 for desalination. After desalination, it enters the deaerator 4 to remove oxygen from the water and finally enters the boiler 5 to be heated into steam. The water after neutralization by ammonia and desalination by the desalination unit 3 has higher purity, significantly reducing the wear and tear on the boiler 5 equipment. Furthermore, the water condensed after the steam in the boiler 5 is utilized can be better reused.

[0028] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gas boiler water quality optimization system characterized by: It comprises ammonia water tank (1), soft water tank (2), desalter (3), deaerator (4), boiler (5) connected in sequence, ammonia water pump (10) is arranged between ammonia water tank (1) and soft water tank (2).

2. The gas boiler water quality optimization system of claim 1, wherein: Heat exchanger is arranged in desalter (3), and the heat exchanger is connected with steam outlet of deaerator (4).

3. The gas-fired boiler water quality optimization system of claim 1, wherein: The inlet end of the boiler (5) is provided with a first pH meter, and the first pH meter is connected with the ammonia water pump (10).

4. The gas-fired boiler water quality optimization system according to claim 1, wherein: The boiler (5) is connected with a sewage tank (9) through a blowdown valve.

5. The gas boiler water quality optimization system of claim 4, wherein: The boiler (5) is connected with a second pH meter and a conductivity meter; the second pH meter and the conductivity meter are connected with the blowdown valve.

6. The gas-fired boiler water quality optimization system according to claim 1, wherein: The boiler (5) is provided with a smoke exhaust passage (6), the smoke exhaust passage (6) is provided with an air preheater (7), the air preheater (7) is connected with a blower (8), and the air outlet of the blower (8) is connected with the boiler (5).

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