Raw water and condensed water coordinated and complementary steam boiler water supplementing system

Abstract

The invention relates to the technical field of water supply of industrial boilers, and provides a raw water and condensate water coordinated and complementary steam boiler water supplementing system which comprises a raw water filter and a condensate water filter. The system comprises a sodion resin exchanger, a softened water tank, a deaerator and a deoxygenated water tank, the chemical adding device comprises a chemical adding pump and a PH (Potential of Hydrogen) sensor. A water inlet path of raw water is sequentially connected to the softened water tank from the raw water filter, the resin exchanger and the softened water tank, a water inlet path of condensed water is connected to the softened water tank from the condensed water filter or directly connected to the softened water tank, the softened water tank is connected to the deaerator, the deaerator is connected to the deoxygenated water tank, and the deoxygenated water tank is connected to the steam boiler. Condensate water can be recycled, the condensate water and raw water are coordinated and complemented to serve as boiler replenishment water, the boiler replenishment water quality is effectively improved, the boiler steam production quality and safety are guaranteed, the heat utilization rate is increased, more water resources are saved, and energy conservation and emission reduction are facilitated.

Description

Technical Field

[0001] This application relates to the field of feedwater technology for industrial boilers, and specifically to a steam boiler feedwater system that coordinates and complements raw water and condensate. Background Technology

[0002] Industrial steam boiler water treatment is a crucial measure to ensure the safe operation of boilers and is also of great significance for energy conservation and emission reduction. The "Boiler Safety Technical Regulations" (TSG11-2020), issued by the State Administration for Market Regulation on October 29, 2020, also elevates boiler water treatment inspection to an unprecedented level, demonstrating its extremely important role. If the makeup water alkalinity is too high, the decomposition of carbonate and bicarbonate salts can easily lead to excessively high boiler water alkalinity, causing steam-water embrittlement and alkaline corrosion, resulting in reduced steam quality.

[0003] Currently, most industrial boilers under 10 tons in China use fully automatic sodium ion exchangers for softening. This process removes hardness from the water by replacing calcium and magnesium ions with sodium ions, resulting in softened makeup water and preventing boiler scaling, thus ensuring safe operation. However, in some remote factories or areas with high tap water costs, hard groundwater or river water is often used, containing many impurities and high alkalinity. This places a heavy load on the resin exchanger and requires a large amount of resin regenerant, wasting regenerant and causing numerous problems for the company due to waste liquid discharge. Using reverse osmosis filtration equipment would incur excessive initial investment costs. Furthermore, a more significant problem is the high alkalinity of the boiler water, which not only causes scaling but also results in high steam moisture content, leading to corrosion of pipes and steam-using equipment, and the formation of large amounts of condensate, wasting scarce water resources and causing significant heat loss.

[0004] Therefore, condensate is an excellent source of makeup water for steam boilers, as its quality is close to soft water and it carries residual heat. Existing technologies related to condensate recovery and utilization, such as CN1180810A, provide a condensate recovery and makeup water system that directly feeds the condensate into the boiler after sedimentation. While this takes into account the importance of condensate recovery, directly feeding it into the boiler introduces a series of new problems. For example, the recovered condensate is often contaminated with iron oxides from corrosion in the pipes, forming scale inside the boiler that affects heat transfer and causes under-deposit corrosion. It may also be contaminated with oil / hydrocarbons, as found in injection molding and food production equipment; therefore, simple sedimentation cannot remove these contaminants. Furthermore, the incorporation of carbon dioxide from the air during condensate return causes a low pH value; directly adding this to the boiler will directly affect the boiler water's pH environment, leading to new problems such as boiler corrosion. For example, the steam boiler makeup water system in CN105588108A first exchanges heat between the condensate and the filtered raw water before it enters the raw water tank or a separate intermediate water tank. This approach results in low heat exchange efficiency, with the condensate still carrying some heat and causing loss. Furthermore, directly introducing the condensate into the resin exchanger and other equipment of the raw water treatment system not only fails to effectively remove various contaminants from the condensate but also introduces unnecessary dissolved oxygen. Therefore, current technology lacks the relevant technologies to meet the needs of steam boilers for improving steam quality and boiler safety. Summary of the Invention

[0005] To address the shortcomings of traditional boiler feedwater technology, this application provides a steam boiler feedwater system that coordinates and complements raw water and condensate. This system can efficiently reuse condensate, making condensate and raw water work together to effectively improve the quality of boiler feedwater, ensure the quality of boiler steam and the safety of the boiler itself, improve heat utilization, save water resources, and contribute to energy conservation and emission reduction.

[0006] In one embodiment, this application provides a steam boiler makeup water system that coordinates and complements raw water and condensate, comprising: Raw water filter and condensate filter; Sodium ion exchanger, soft water tank, deaerator and deoxygenated water tank; and A dosing device, comprising a dosing pump and a pH sensor, wherein the outlet of the dosing pump is connected to the deoxygenated water tank and the pH sensor is disposed above the deoxygenated water tank; The raw water inlet path is sequentially from the raw water filter, the resin exchanger, and the soft water tank. The condensate inlet path is from the condensate filter connected to the soft water tank or directly connected to the soft water tank. The soft water tank is used to store raw water and condensate. The outlet of the soft water tank is connected to the deaerator. The outlet of the deaerator is connected to the deoxygenated water tank. The outlet of the deoxygenated water tank is connected to the steam boiler.

[0007] In one embodiment, a liquid distribution assembly is installed near the bottom of the soft water tank. The liquid distribution assembly includes an outer liquid distribution ring pipe and an inner liquid distribution ring pipe, which are arranged concentrically in the vertical direction. Each of the outer and inner liquid distribution ring pipes has several downward-facing liquid distribution ports. The outer and inner liquid distribution ring pipes are connected by a connecting pipe. A condensate inlet is provided on the side wall of the soft water tank at the position corresponding to the liquid distribution assembly, and the condensate inlet is connected to the outer liquid distribution ring pipe.

[0008] In one embodiment, the soft water tank is cylindrical, and the outer wall of the outer liquid distribution ring pipe is fixedly connected to the inner wall of the soft water tank by a plurality of first supports arranged in a circular array. The inner wall of the outer liquid distribution ring pipe is fixedly connected to the outer wall of the inner liquid distribution ring pipe by a plurality of second supports arranged in a circular array. The projection of the connecting pipe and the second supports in the vertical direction is arranged around the inner liquid distribution ring pipe at intervals.

[0009] In one embodiment, the raw water filter includes a first shell in the shape of a hollow rectangle or cylinder, and the condensate filter includes a second shell in the shape of a hollow rectangle or cylinder. The first shell and the second shell are fixedly spliced ​​together as a whole. A vertical partition wall is provided between the first shell and the second shell. The partition wall and the inner wall of the first shell enclose a raw water filtration chamber, which is filled with raw water filter material. The partition wall and the inner wall of the second shell enclose a condensate filtration chamber, which is filled with condensate filter material. A first inlet and a first outlet are respectively provided at both ends of the raw water filtration chamber, and a second inlet and a second outlet are respectively provided at both ends of the condensate filtration chamber, thereby integrating the raw water filter and the condensate filter into a dual-channel filter.

[0010] In one embodiment, the raw water filtration material includes one or more of quartz sand, anthracite, and coal-based granular carbon, and the condensate filtration material includes one or more of anthracite, garnet, and coconut shell granular carbon.

[0011] In one embodiment, the two ends of the raw water filtration chamber are sealed by first plugs, and the two ends of the condensate filtration chamber are sealed by second plugs. The first inlet and the second inlet are respectively located on the first plugs at both ends, and the second inlet and the second outlet are respectively located on the second plugs at both ends. The first plugs and the second plugs are connected as one unit.

[0012] In one embodiment, the partition wall is made of thermal insulation material or is filled with thermal insulation material, and the second outer shell is filled with thermal insulation material.

[0013] In one embodiment, the raw water filtration chamber is further provided with a first backwash inlet and a first backwash outlet at both ends. The first backwash inlet is located at the end of the raw water filtration chamber near the first outlet, so the first backwash outlet is located at the end of the raw water filtration chamber near the first inlet. The condensate filtration chamber is further provided with a second backwash inlet and a second backwash outlet at both ends. The second backwash inlet is located at the end of the raw water filtration chamber near the second outlet, so the second backwash outlet is located at the end of the raw water filtration chamber near the second inlet.

[0014] In one design, the steam boiler makeup water system, which coordinates and complements raw water and condensate, also includes: The automatic water quality monitor and automatic switching valve are used to detect indicators such as pH value, conductivity and oil content of condensate. Based on these indicators, it determines whether the condensate should enter the soft water tank directly or be filtered first by the condensate filter before entering the soft water tank. This is achieved by controlling the opening and closing of the automatic switching valve.

[0015] In one design, the steam boiler makeup water system, which coordinates and complements raw water and condensate, also includes: The dosing device also includes a chemical storage tank. The inlet end of the dosing pump is connected to the chemical storage tank. The pH value of the water in the deoxygenated water tank is detected by the pH sensor. Based on this indicator, it is determined whether to start the dosing pump to add chemicals to the deoxygenated water tank, thereby regulating the water quality of the boiler water. A reboiling device is installed in the deoxygenated water tank to maintain the water in the deoxygenated water tank at a saturated temperature.

[0016] The beneficial effects of this application are: This application allows for the reuse of condensate, enabling it to complement the raw water as boiler feedwater. This effectively improves the quality of boiler feedwater, ensures the quality and safety of boiler steam, enhances heat utilization, saves water resources, and promotes energy conservation and emission reduction. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall connection of the water replenishment system in one embodiment of this application; Figure 2This is a schematic diagram of the cooperation between the soft water tank, the deoxygenated water tank, and the dosing device in one embodiment of this application; Figure 3 This is a schematic diagram of the planar arrangement of the liquid distribution assembly within the soft water tank in one embodiment of this application; Figure 4 This is a cross-sectional schematic diagram of the water replenishment component in one embodiment of this application; Figure 5 This is a schematic diagram of a dual-channel filter in one embodiment of this application; Labels for each item in the figure: 1. Dual-channel filter; 101. Raw water filter; 1011. First outer casing; 1012. First plug; 102. Condensate filter; 1021. Second outer casing; 1022. Second plug; 103. Partition wall; 104. Raw water filtration chamber; 1041. Raw water filter material; 105. Condensate filtration chamber; 1051. Condensate filter material; N 11 First water inlet; N 12 First outlet; N 21 Second water inlet; N 22 Second outlet; O 11 First backwash inlet; O 12 First backwash outlet; O 21 Second backwash import; O 22 Second backwash outlet; 2. Resin exchanger; 3. Soft water tank; 300. Liquid distribution assembly; 301. Outer liquid distribution ring pipe; 302. Inner liquid distribution ring pipe; 303. First support; 304. Second support; 305. Condensate inlet; 306. Connecting pipe; 307. Liquid distribution port; 4. Deaerator; 5. Deaerated water tank; 6. Dosing device; 601. Dosing pump; 602. pH sensor. Detailed Implementation

[0019] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application. Similarly, the following examples are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0023] In some implementations, please refer to Figure 1 and Figure 2 This application provides a steam boiler makeup water system for coordinated and complementary raw water and condensate water, including: a raw water filter 101 and a condensate water filter 102; a sodium ion exchanger 2, a soft water tank 3, a deaerator 4 and a deoxygenated water tank 5; and a dosing device 6, wherein the dosing device 6 includes a dosing pump 601 and a pH sensor 602, the outlet end of the dosing pump 601 is connected to the deoxygenated water tank 5, and the pH sensor 602 is disposed on the deoxygenated water tank 5; The raw water inlet path is sequentially from the raw water filter 101, the resin exchanger 2, and the soft water tank 3. The condensate inlet path is from the condensate filter 102 connected to the soft water tank 3 or directly connected to the soft water tank 3. The soft water tank 3 is used to store raw water and condensate. The outlet of the soft water tank 3 is connected to the deaerator 4. The outlet of the deaerator 4 is connected to the deoxygenated water tank 5. The outlet of the deoxygenated water tank 5 is connected to the steam boiler.

[0024] The water replenishment system of this application is roughly divided into two paths. One path is the raw water path: the raw water passes through the raw water filter 101 to filter out impurities, and then enters the resin exchanger 2, where calcium and magnesium ions, which are essential for hardness, are exchanged with the ion exchange resin in the softener. The calcium and magnesium ions are exchanged for sodium ions, making it less likely for carbonate and sulfate scale to form in the water, thus obtaining softened water. The softened water is then stored in the softened water tank 3. The other path is the condensate path. Depending on the water quality, it can be directly introduced into the softened water tank 3 to mix with the softened water. If the water quality is poor or has a high contaminant content, the condensate is first filtered through the condensate filter 102 to remove impurities before entering the softened water tank 3 to mix with room temperature softened water. In this way, condensate with a quality close to that of softened water is reused, improving heat utilization and reducing water resource loss.

[0025] Deaerator 4 heats the water to its saturation temperature (approximately 104-110℃), reducing the solubility of non-condensable gases like oxygen in the water to zero. This allows the released gases to escape from the water and be discharged from the system, thus reducing or preventing oxygen corrosion in the boiler. Reusing the high-temperature condensate (typically 75-90℃) allows heat transfer to the soft water, raising the temperature in the soft water tank 3. This preheating of the deaerator 4's inlet water makes it easier and faster for the deaerator 4 to heat the water to its protective temperature, effectively reducing its energy consumption and saving energy.

[0026] To address the need for pH control in the makeup water, a pH sensor 602PH is installed on the deaerator tank 5 to monitor the pH value within the tank. While reusing condensate can recover heat and save energy, it can easily cause fluctuations in the pH of the soft water. Therefore, the pH sensor 602PH is installed on the deaerator tank 5 to monitor the pH of the water in the tank in real time. If the pH value is too low or too high, appropriate chemicals are added for regulation to protect boiler safety.

[0027] In addition, the dosing pump 601 can also be set to be controlled according to the pH environment of the water in the boiler. When it is determined that the boiler needs to control the water with chemicals, the chemicals are injected into the soft water tank 3 through the dosing device 6. The deaeration tank 5 provides sufficient space for the chemicals to mix with the water, which is conducive to thorough and uniform mixing. Thus, the chemicals can be added to the boiler through the water supply end, without the need to install a separate dosing device 6 on the boiler.

[0028] In some implementations, please refer to Figure 3 and Figure 4 The soft water tank 3 has a liquid distribution assembly 300 located near the bottom. The liquid distribution assembly 300 includes an outer liquid distribution ring pipe 301 and an inner liquid distribution ring pipe 302. The projections of the outer liquid distribution ring pipe 301 and the inner liquid distribution ring pipe 302 in the vertical direction are concentric. The outer liquid distribution ring pipe 301 and the inner liquid distribution ring pipe 302 each have a plurality of downward-facing liquid distribution ports 307. The outer liquid distribution ring pipe 301 and the inner liquid distribution ring pipe 302 are connected by a connecting pipe 306. A condensate inlet 305 is located on the side wall of the soft water tank 3 at a position corresponding to the liquid distribution assembly 300. The condensate inlet 305 is connected to the outer liquid distribution ring pipe 301.

[0029] The liquid distribution assembly 300 can be arranged in a ring or rectangle, as long as it can be evenly distributed at the bottom of the soft water tank 3. The liquid distribution assembly 300 is configured radially as an outer liquid distribution ring pipe 301 and an inner liquid distribution ring pipe 302, which are connected or independently connected to the condensate inlet 305. Thus, multiple radially distributed liquid distribution channels are formed within the soft water tank 3 through the outer and inner liquid distribution ring pipes 301 and 302. The condensate enters the soft water tank 3 through the distribution ports 307 on the outer and inner liquid distribution ring pipes 301 and 302, causing the condensate to overflow upwards in a dispersed form with low velocity and small bubbles. During its ascent, it naturally mixes with the raw water, ensuring both mixing and heat transfer efficiency. In this example, the distribution ports 307 face downwards. When the condensate enters the soft water tank 3 through the downward-facing distribution ports 307, it diffuses outwards and mixes with the soft water, resulting in more thorough mixing.

[0030] In some implementations, please refer to Figure 3The soft water tank 3 is cylindrical. The outer wall of the outer liquid distribution ring pipe 301 is fixedly connected to the inner wall of the soft water tank 3 via several first supports 303 arranged in a circular array. The inner wall of the outer liquid distribution ring pipe 301 is fixedly connected to the outer wall of the inner liquid distribution ring pipe 302 via several second supports 304 arranged in a circular array. The vertical projections of the connecting pipe 306 and the second supports 304 are arranged at intervals around the inner liquid distribution ring pipe 302, so that the liquid distribution assembly 300 is securely fixed to the bottom of the soft water tank 3. The liquid distribution assembly 300, the first supports 303, and the second supports 304 can be made of corrosion-resistant, oxidation-resistant, and high-temperature-resistant materials.

[0031] In some implementations, please refer to Figure 3 The raw water filter 101 includes a first outer shell 1011 that is hollow and rectangular or cylindrical, and the condensate filter 102 includes a second outer shell that is hollow and rectangular or cylindrical. The first outer shell 1011 and the second outer shell 1021 are fixedly spliced ​​together as a whole. A vertical partition wall 103 is provided between the first outer shell 1011 and the second outer shell 1021. The partition wall 103 and the inner wall of the first outer shell 1011 enclose a raw water filtration chamber 104, which is filled with raw water. The filter material 1041, the partition wall 103 and the inner wall of the second outer shell 1021 enclose a condensate filter chamber 105, the condensate filter chamber 105 is filled with condensate filter material 1051, the two ends of the raw water filter chamber 104 are respectively provided with a first water inlet N11 and a first water outlet N12, the two ends of the condensate filter chamber 105 are respectively provided with a second water inlet N21 and a second water outlet N22, thereby integrating the raw water filter 101 and the condensate filter 102 into a dual-channel filter 1.

[0032] During filtration, raw water enters through the first inlet N11 of the raw water filter 101, is filtered by the filter material inside the chamber, and is discharged through the first outlet N12 to enter the next treatment process. Condensate enters through the second inlet N21 of the condensate filter 102, is filtered by the filter material inside the chamber, and is discharged through the second outlet N22 to enter the soft water tank 3. Impurities are filtered out by the filter material inside the respective filter chambers. In this example, the raw water filter 101 and the condensate filter 102 are integrated into one unit, with a partition separating the raw water filter chamber 104 and the condensate filter chamber 105 into two independent filtration channels. This reduces the space occupied by the filtration equipment, which is extremely advantageous for small factories or workshops with limited space. The two filters can share the tank, structural components, and control system, reducing manufacturing and installation costs. Management is more convenient, with centralized operation and monitoring points simplifying daily work and maintenance processes such as filter replacement and repair.

[0033] In some embodiments, the raw water filtration material 1041 includes one or more of quartz sand, anthracite, and coal-based granular carbon, and the condensate filtration material 1051 includes one or more of anthracite, garnet, and coconut shell granular carbon.

[0034] In some implementations, please refer to Figure 5 The raw water filtration chamber 104 is sealed at both ends by first plugs 1012, and the condensate filtration chamber 105 is sealed at both ends by second plugs 1022. The first inlet N11 and the second inlet N21 are respectively located on the first plugs 1012 at both ends, and the second inlet N21 and the second outlet N22 are respectively located on the second plugs 1022 at both ends. The first plugs 1012 and the second plugs 1022 are connected as a single unit, but can also be disassembled and separated individually. Thus, during operation, the two connected plugs support each other, increasing structural strength. During maintenance, either plug can be disassembled and maintained individually without interfering with the operation of the other filter.

[0035] In some embodiments, the partition wall 103 is made of heat-insulating material or is filled with heat-insulating material, and the second outer shell 1021 is filled with heat-insulating material. The heat-insulating partition wall 103 separates the raw water filtration chamber 104 and the condensate filtration chamber 105, reducing the possibility of heat loss during subsequent treatment due to heat exchange between the condensate in the condensate filtration chamber 105 and the raw water. Furthermore, the second outer shell 1021 and the plug of the condensate filtration chamber 105 are both equipped with heat-insulating material to prevent heat loss. Additionally, the pipes through which the condensate enters the filter from the recovery end and flows from the filter into the soft water tank 3 can also use insulated pipes to minimize heat loss from the condensate, thereby facilitating full heat recovery and energy saving.

[0036] In some implementations, please refer to Figure 5 The raw water filtration chamber 104 is also provided with a first backwash inlet O at each end. 11 and the first backwash outlet O 12 First backwash of imported O 11 The raw water filtration chamber 104 is located near the first water outlet N. 12 One end, so the first backwash outlet O 12 The raw water filtration chamber 104 is located near the first water inlet N. 11 At one end, the two ends of the condensate filter chamber 105 are respectively provided with a second backwash inlet O. 21 Second backwash outlet O 22 Second backwash of imported O 21The water filter chamber 104 is located near the second water outlet N. 22 One end, so the second backwash outlet O 22 The raw water filtration chamber 104 is located near the second water inlet N. 21 One end.

[0037] During backwashing, the raw water filter 101 passes through the first backwash inlet O 11 Backwash water is introduced, entering the raw water filtration chamber 104 in the opposite direction to the raw water filtration direction, to rinse and unclog the internal filter media, and finally exit from the first backwash outlet O. 12 Exhaust system. Condensate filter 102 passes through the second backwash inlet O. 21 Backwash water is introduced, entering the condensate filter chamber 105 in the opposite direction to the condensate filter direction, to rinse and unclog the internal filter media, and finally exits from the second backwash outlet O. 22 emission.

[0038] In some implementations, please refer to Figure 5 The steam boiler makeup water system, which coordinates and complements raw water and condensate, also includes: The system includes an automatic water quality monitor and an automatic switching valve. The automatic water quality monitor detects indicators such as pH value, conductivity, and oil content in the condensate. Based on these indicators, it determines whether the condensate should directly enter the soft water tank 3, or first enter the condensate filter 102 for filtration before entering the soft water tank 3. This is achieved by controlling the opening and closing of the automatic switching valve. Furthermore, valves and detection devices can be installed at each inlet, outlet, and backwash inlet / outlet according to actual needs to improve the automation and intelligence of the entire system.

[0039] In one scenario, please refer to Figure 2 The steam boiler makeup water system, which coordinates and complements raw water and condensate, also includes: The dosing device 6 also includes a chemical storage tank. The inlet end of the dosing pump 601 is connected to the chemical storage tank. The pH value of the water in the deoxygenated water tank 5 is detected by the pH sensor 602. Based on this indicator, it is determined whether to start the dosing pump 601 to add chemicals to the deoxygenated water tank 5, thereby regulating the water quality of the boiler water. A reboiling device is installed in the deoxygenated water tank 5 to maintain the water in the deoxygenated water tank 5 at a saturated temperature.

[0040] This application allows for the reuse of condensate, enabling it to complement the raw water as boiler feedwater. This effectively improves the quality of boiler feedwater, ensures the quality and safety of boiler steam, enhances heat utilization, saves water resources, and promotes energy conservation and emission reduction.

[0041] The above are merely some embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and alterations to the above embodiments within the scope of this application.

Claims

1. A steam boiler makeup water system in which raw water and condensate water are coordinated and complementary, characterized in that, include: Raw water filter and condensate filter; Sodium ion exchanger, soft water tank, deaerator and deoxygenated water tank; and A dosing device, comprising a dosing pump and a pH sensor, wherein the outlet of the dosing pump is connected to the deoxygenated water tank and the pH sensor is disposed above the deoxygenated water tank; The raw water inlet path is sequentially from the raw water filter, the resin exchanger, and the soft water tank. The condensate inlet path is from the condensate filter connected to the soft water tank or directly connected to the soft water tank. The soft water tank is used to store raw water and condensate. The outlet of the soft water tank is connected to the deaerator. The outlet of the deaerator is connected to the deoxygenated water tank. The outlet of the deoxygenated water tank is connected to the steam boiler.

2. The steam boiler makeup water system for coordinated and complementary raw water and condensate as described in claim 1, characterized in that: A liquid distribution assembly is located near the bottom inside the soft water tank. The liquid distribution assembly includes an outer liquid distribution ring pipe and an inner liquid distribution ring pipe. The projections of the outer and inner liquid distribution ring pipes in the vertical direction are concentric. Each of the outer and inner liquid distribution ring pipes has several downward-facing liquid distribution ports. The outer and inner liquid distribution ring pipes are connected by a connecting pipe. A condensate inlet is located on the side wall of the soft water tank corresponding to the position of the liquid distribution assembly. The condensate inlet is connected to the outer liquid distribution ring pipe.

3. The steam boiler makeup water system for coordinated and complementary raw water and condensate water according to claim 2, characterized in that: The soft water tank is cylindrical. The outer wall of the outer liquid distribution ring pipe is fixedly connected to the inner wall of the soft water tank through a plurality of first supports arranged in a circular array. The inner wall of the outer liquid distribution ring pipe is fixedly connected to the outer wall of the inner liquid distribution ring pipe through a plurality of second supports arranged in a circular array. The projection of the connecting pipe and the second supports in the vertical direction is arranged around the inner liquid distribution ring pipe at intervals.

4. The steam boiler makeup water system for coordinated and complementary raw water and condensate as described in claim 1, characterized in that: The raw water filter includes a first shell in the shape of a hollow rectangle or cylinder, and the condensate filter includes a second shell in the shape of a hollow rectangle or cylinder. The first shell and the second shell are fixedly spliced ​​together as a whole. A vertical partition wall is provided between the first shell and the second shell. The partition wall and the inner wall of the first shell enclose a raw water filtration chamber, which is filled with raw water filter material. The partition wall and the inner wall of the second shell enclose a condensate filtration chamber, which is filled with condensate filter material. A first inlet and a first outlet are respectively provided at both ends of the raw water filtration chamber. A second inlet and a second outlet are respectively provided at both ends of the condensate filtration chamber, thereby integrating the raw water filter and the condensate filter into a dual-channel filter.

5. The steam boiler makeup water system for coordinated and complementary raw water and condensate water according to claim 4, characterized in that: The raw water filtration material includes one or more of quartz sand, anthracite, and coal-based granular carbon, and the condensate filtration material includes one or more of anthracite, garnet, and coconut shell granular carbon.

6. The steam boiler makeup water system for coordinated and complementary raw water and condensate water according to claim 4, characterized in that: The raw water filtration chamber is sealed at both ends by first plugs, and the condensate filtration chamber is sealed at both ends by second plugs. The first water inlet and the second water inlet are respectively located on the first plugs at both ends, and the second water inlet and the second water outlet are respectively located on the second plugs at both ends. The first plugs and the second plugs are connected as one unit.

7. The steam boiler makeup water system for coordinated and complementary raw water and condensate water according to claim 6, characterized in that: The partition wall is made of heat-insulating material or is filled with heat-insulating material, and the second outer shell is filled with heat-insulating material.

8. The steam boiler makeup water system for coordinated and complementary raw water and condensate water according to claim 4, characterized in that: The raw water filtration chamber is further provided with a first backwash inlet and a first backwash outlet at both ends. The first backwash inlet is located at the end of the raw water filtration chamber near the first outlet, so the first backwash outlet is located at the end of the raw water filtration chamber near the first inlet. The condensate filtration chamber is further provided with a second backwash inlet and a second backwash outlet at both ends. The second backwash inlet is located at the end of the raw water filtration chamber near the second outlet, so the second backwash outlet is located at the end of the raw water filtration chamber near the second inlet.

9. The steam boiler makeup water system for coordinated and complementary raw water and condensate water according to claim 4, characterized in that, Also includes: The automatic water quality monitor and automatic switching valve are used to detect indicators such as pH value, conductivity and oil content of condensate. Based on these indicators, it determines whether the condensate should enter the soft water tank directly or be filtered first by the condensate filter before entering the soft water tank. This is achieved by controlling the opening and closing of the automatic switching valve.

10. The steam boiler makeup water system for coordinated and complementary raw water and condensate water according to claim 1, characterized in that, Also includes: The dosing device also includes a chemical storage tank. The inlet end of the dosing pump is connected to the chemical storage tank. The pH value of the water in the deoxygenated water tank is detected by the pH sensor. Based on this indicator, it is determined whether to start the dosing pump to add chemicals to the deoxygenated water tank, thereby regulating the water quality of the boiler water. A reboiling device is installed in the deoxygenated water tank to maintain the water in the deoxygenated water tank at a saturated temperature.

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