Steam condensate water recycling system

Abstract

The utility model provides a steam condensate water recycling system. The steam condensate water recycling system comprises a water collecting unit, a water treatment unit, a water storage tank and a circulating water pipe which are sequentially communicated through a first pipeline; the water collecting unit is communicated with a steam generating device through a second pipeline and is used for collecting steam condensate water generated after steam generated by the steam generating device is condensed; the water treatment unit is used for treating the steam condensate water entering the water treatment unit so as to remove impurity ions in the steam condensate water; the water storage tank is used for storing steam condensate water treated by the water treatment unit; the end, away from the water storage tank, of the circulating water pipe and the ends, away from the circulating water pipe, of the branch pipes are all used for being communicated with a steam condensate water recycling device. According to the steam condensate recycling device, steam condensate is recycled, water resources are saved, the burden of sewage treatment is reduced, and the water using cost of the steam condensate recycling device is reduced.

Description

Technical Field

[0001] This application relates to the field of steam condensate technology, and in particular to a steam condensate recycling system. Background Technology

[0002] In chemical production, steam is widely used in processes such as heating, evaporation, and drying. When steam releases heat, its temperature drops and it condenses into liquid water, forming steam condensate. However, in practice, steam condensate is often directly discharged into wastewater treatment systems, which not only wastes water resources but also burdens wastewater treatment.

[0003] However, with the increasing scarcity of water resources, water conservation has become a global focus. Furthermore, chemical production processes consume significant amounts of water; for example, the production of chemical products (such as captan) requires primary water. The quality of steam condensate is generally much higher than softened water, approaching pure water. Further purification of the steam condensate allows it to be used as primary water in chemical production processes. Therefore, to avoid water waste, reduce the burden of wastewater treatment, and lower water costs in chemical production processes, this application proposes a steam condensate recycling system. Utility Model Content

[0004] This application provides a steam condensate recycling system to solve the technical problems described in the background section.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] This application provides a steam condensate recycling system, comprising: a water collection unit, a water treatment unit, a water storage tank, and a circulating water pipe connected sequentially through a first pipe;

[0007] The water collection unit is connected to a steam generating device via a second pipe, and is used to collect the condensate water after the steam generated by the steam generating device is condensed.

[0008] The water treatment unit is used to treat the steam condensate entering it to remove impurity ions from the steam condensate;

[0009] The water storage tank is used to store the steam condensate after the water treatment unit has processed it.

[0010] The circulating water pipe is connected to multiple branch pipes, and the end of the branch pipe away from the water storage tank and the end of the multiple branch pipes away from the circulating water pipe are all used to connect to the steam condensate recycling device.

[0011] Optionally, the water collection unit includes a condenser and a water collection tank;

[0012] The air inlet of the condenser is connected to the steam outlet of the steam generating device through the second pipe, and the condensate outlet of the condenser is connected to the water collection tank through the first pipe.

[0013] Optionally, the steam outlet of the steam generating device is connected to a steam waste heat utilization device via a third pipe, and the steam outlet of the steam waste heat utilization device is connected to the air inlet of the condenser via a second pipe.

[0014] Optionally, the water treatment unit includes a primary impurity removal box and a secondary impurity removal box that are sequentially connected through the first pipe;

[0015] A first water pump is installed on the first pipeline between the primary impurity removal box and the water collection unit. The primary impurity removal box is filled with multiple impurity removal balls, and the secondary impurity removal box is equipped with a cation exchange membrane.

[0016] The diameter of the impurity removal ball is larger than the diameter of the first pipe.

[0017] Optionally, the impurity removal ball is made of manganese sand.

[0018] There are multiple cation exchange membranes, which are arranged at equal intervals in the secondary impurity removal box. The cation exchange membranes are made of cation exchange material.

[0019] Optionally, a filter screen is provided at one end of the first pipe that connects to the primary impurity removal box.

[0020] Optionally, the top of the primary impurity removal box is sealed with a first cover plate;

[0021] The top of the secondary impurity removal box is provided with a second cover plate.

[0022] Optionally, a level gauge may be installed on the water storage tank.

[0023] Optionally, a first flow regulating valve is provided on the body of the circulating water pipe near the steam condensate recycling device;

[0024] Each of the branch pipes is equipped with a second flow regulating valve.

[0025] Optionally, a second water pump is installed on the circulating water pipe near the steam condensate recycling device.

[0026] The steam condensate recycling system provided in this application collects steam condensate from the steam generating device through a water collection unit. A water treatment unit then treats the condensate to remove impurities and ions. The treated condensate is stored in a storage tank, allowing it to be used as primary water in chemical production. Water from the storage tank flows through a circulation pipe into a steam condensate recycling device connected to that pipe. It also flows through multiple branch pipes to other steam condensate recycling devices, enabling multiple recycling units to utilize the condensate. Compared to existing technologies that directly discharge steam condensate into wastewater treatment systems, this system not only saves water resources and reduces the burden on wastewater treatment but also lowers the water costs of the recycling devices. Furthermore, the water treatment unit improves the water quality of the recycling devices, resulting in higher-quality chemical products produced using the recycled condensate. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A flowchart of a steam condensate recycling system provided in an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the structure of a steam condensate recycling system provided in an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of a steam condensate recycling system provided in another embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the structure of a primary impurity removal box provided in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the structure of a two-stage impurity removal box provided in an embodiment of this application.

[0033] In the diagram: 101, First Pipeline; 1011, First Water Pump; 102, Second Pipeline; 103, Third Pipeline; 200, Water Collection Unit; 201, Condenser; 202, Water Collection Tank; 300, Water Treatment Unit; 301, Primary Impurity Removal Box; 3011, Impurity Removal Ball; 3012, First Cover Plate; 302, Secondary Impurity Removal Box; 3021, Cation Exchange Membrane; 3022, Second Cover Plate; 400, Water Storage Tank; 500, Circulating Water Pipe; 501, Branch Pipe; 5011, Second Flow Control Valve; 502, First Flow Control Valve; 503, Second Water Pump; 600, Steam Generating Device; 700, Steam Condensate Recycling Device; 800, Steam Waste Heat Utilization Device. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0035] refer to Figures 1 to 5 This application provides a steam condensate recycling system, comprising: a water collection unit 200, a water treatment unit 300, a water storage tank 400 and a circulating water pipe 500 connected in sequence through a first pipe 101;

[0036] The water collection unit 200 is connected to the steam generating device 600 through the second pipe 102, and is used to collect the steam condensate after the steam generated by the steam generating device 600 is condensed. The steam generating device 600 can be any chemical product production device in a chemical plant, and can be set according to actual needs. This application does not specifically limit it.

[0037] The water treatment unit 300 is used to treat the steam condensate entering it to remove impurity ions. Steam condensate typically contains iron ions and ammonia nitrogen, which is closely related to the operating conditions of the steam system, the equipment materials, and the treatment process. To prevent equipment corrosion and scaling, the steam condensate usually needs to be treated to remove iron and ammonia nitrogen.

[0038] The water storage tank 400 is used to store the steam condensate after treatment by the water treatment unit 300. This facilitates the recycling of the steam condensate after removing iron ions and ammonia nitrogen, ensuring the stability of the steam condensate recycling.

[0039] Multiple branch pipes 501 are connected to the circulating water pipe 500, and the end of the branch pipe 501 away from the water storage tank 400 and the ends of the multiple branch pipes 501 away from the circulating water pipe 500 are all used to connect to the steam condensate recycling device 700. Among them, the multiple steam condensate recycling devices 700 can be different chemical product production devices or other chemical product production devices.

[0040] The steam condensate recycling system provided in this application collects the steam condensate from the steam generated by the steam generating device 600 (which can be a steam generator, a laboratory distillation device, or a chemical product production device in a chemical plant; the specific device can be configured according to actual needs, and this application does not specifically limit it) through the water collection unit 200. The water treatment unit 300 then treats the steam condensate entering the unit to remove impurity ions. The treated steam condensate is then stored in the water storage tank 400, allowing it to be used as primary water in the chemical product production process. The water in the storage tank 400 is then connected to the steam condensate recycling system via the circulation water pipe 500. In device 700, steam condensate can also be fed through multiple branch pipes 501 into a steam condensate recycling device 700 connected to each of the branch pipes 501 (the steam condensate recycling device 700 can be a closed-loop condensate recovery system, a condensate recovery device in industrial production, a cooling tower water circulation system, a condensate recovery device in laboratories and small equipment, etc., which can be specifically set according to actual needs, and this application does not specifically limit it). This realizes the utilization of steam condensate by multiple steam condensate recycling devices 700. Compared with the prior art of directly discharging steam condensate into the sewage treatment system, the recycling of steam condensate in this application not only saves water resources and reduces the burden of sewage treatment, but also reduces the water cost of the steam condensate recycling device 700. In addition, this application improves the water quality of the steam condensate recycling device 700 by treating the steam condensate through the water treatment unit 300, resulting in better quality chemical products produced by the steam condensate recycling device 700.

[0041] In some embodiments, reference Figure 2 and Figure 3 The water collection unit 200 in this application includes a condenser 201 and a water collection tank 202. Specifically, the air inlet of the condenser 201 is connected to the steam outlet of the steam generating device 600 through a second pipe 102, and the condensate outlet of the condenser 201 is connected to the water collection tank 202 through a first pipe 101. The specifications and model of the condenser 201 can be set according to actual needs, and this application does not specifically limit them.

[0042] In the above embodiment, the steam generated by the steam generating device 600 enters the condenser 201 through the second pipe 102. The condenser 201 condenses the steam into steam condensate, and the steam condensate enters the water collection tank 202 through the condensate outlet on the condenser 201 and the first pipe 101. The water collection tank 202 collects the steam condensate, which is convenient for subsequent recycling.

[0043] In some embodiments, reference Figure 3 In this application, the steam outlet of the steam generating device 600 is connected to a steam waste heat utilization device 800 via a third pipe 103, and the steam outlet of the steam waste heat utilization device 800 is connected to the air inlet of the condenser 201 via a second pipe 102. The steam waste heat utilization device 800 can be a heat exchanger, boiler, etc., and can be specifically configured according to actual needs; however, this application does not impose any specific limitations on it.

[0044] In the above embodiments, the steam generated by the steam generating device 600 is typically at a high temperature. When the steam generated by the steam generating device 600 enters the steam waste heat utilization device 800 through the third pipe 103, the steam waste heat utilization device 800 utilizes the heat of the steam, causing the temperature of the steam to decrease after passing through the steam waste heat utilization device 800. The steam with the reduced temperature then enters the condenser 201 through the second pipe 102 and is condensed by the condenser 201. The utilization of the steam waste heat utilization device 800 not only effectively utilizes the heat carried by the steam generated by the steam generating device 600, but also reduces the condensation burden on the condenser 201, allowing the steam entering the condenser 201 to be quickly condensed into steam condensate, thereby improving the condensation efficiency of the steam generated by the steam generating device 600.

[0045] In some embodiments, reference 2 to Figure 5 The water treatment unit 300 in this application includes a primary impurity removal box 301 and a secondary impurity removal box 302 connected sequentially by a first pipe 101. Specifically, a first water pump 1011 is installed on the first pipe 101 between the primary impurity removal box 301 and the water collection unit 200. The primary impurity removal box 301 is filled with a plurality of impurity removal balls 3011, and a cation exchange membrane 3021 is installed in the secondary impurity removal box 302. The first water pump 1011 is used to provide the flow power for the steam condensate collected by the water collection unit 200 to enter the primary impurity removal box 301. The impurity removal balls 3011 are used to perform primary treatment on the steam condensate, while the cation exchange membrane 3021 is used to perform secondary impurity removal on the steam condensate after primary impurity removal treatment.

[0046] The diameter of the impurity removal ball 3011 is larger than that of the first pipe 101, which prevents the impurity removal ball 3011 from entering the first pipe 101 during the flow of condensate water, thereby ensuring the flowability of the first pipe 101 and the impurity removal efficiency in the primary impurity removal box 301.

[0047] In some embodiments, the impurity removal ball 3011 in this application is made of manganese sand. Since steam condensate contains iron ions, and manganese sand has a catalytic oxidation effect, the manganese dioxide in the manganese sand, upon contact with iron-containing water, can catalytically oxidize the ferrous iron in the water to ferric iron, which then adheres to the surface of the manganese sand particles, thereby achieving the purpose of iron removal. Specifically, manganese dioxide is oxidized by dissolved oxygen in the water to heptavalent manganese oxide, which then oxidizes the ferrous iron in the water to ferric iron precipitate. When water flows through the manganese sand filter layer, the ferric iron precipitate is adsorbed between the manganese sand particles and in the filter layer, thereby removing iron ions from the water. The reaction process is as follows:

[0048] 4MnO2 + 3O2 = 2Mn2O7

[0049] Mn₂O₇ + 6Fe 2+ +3H₂O=2MnO₂+6Fe 3+ +OH -

[0050] Fe 3+ +3OH - =Fe(OH)3↓

[0051] Additionally, refer to Figure 5 Multiple cation exchange membranes 3021 are arranged at equal intervals within the secondary impurity removal chamber 302. The cation exchange membranes 3021 are made of cation exchange material. The multiple cation exchange membranes 3021 improve the impurity removal efficiency of the secondary impurity removal chamber 302 for steam condensate. Furthermore, since the steam condensate still contains a certain amount of ammonia nitrogen after iron ion removal, and the cation exchange membranes 3021 made of cation exchange material contain sulfonic acid groups (-SO3H4O2). — The acidic group of ) readily ionizes in water to release H+. + Ions, while NH4+ is present in steam condensate. 4+ H+ ionized from ion and cation exchange membrane 3021 + Ion exchange occurs, causing the cations NH in the solution to... 4+ The H+ is transferred to the cation exchange membrane, while the H+ on the cation exchange membrane 3021... + The ammonia nitrogen in the steam condensate is exchanged into the water, thus removing it. The specific reaction is as follows:

[0052] RSO3H + NH 4+ → RSO3NH4+ +H +

[0053] In some embodiments, a filter screen is provided at one end of the first pipe 101 that connects to the primary impurity removal box 301. The filter screen may be made of stainless steel, and the mesh diameter of the filter screen may be set according to actual needs, but this application does not specifically limit it.

[0054] In the above embodiment, by setting a filter screen at the end of the first pipe 101 that is connected to the first-stage impurity removal box 301, the impurity removal ball 3011 made of manganese sand can be prevented from entering the first pipe 101 and causing blockage of the first pipe 101, thereby ensuring the smooth flow of steam condensate.

[0055] In some embodiments, reference Figure 4 and Figure 5 The top of the primary impurity removal box 301 in this application is sealed with a first cover plate 3012; wherein, the first cover plate 3012 is provided to facilitate the placement of the impurity removal ball 3011 into the primary impurity removal box 3011 or the replacement of the impurity removal ball 3011 in the primary impurity removal box 3011 by opening the first cover plate 3012, so as to ensure the impurity removal efficiency of the impurity removal ball 3011 for steam condensate.

[0056] In addition, a second cover plate 3022 is provided on the top of the secondary impurity removal box 302. The second cover plate 3022 is provided to facilitate the placement of the cation exchange membrane 3021 into the secondary impurity removal box 302, or to clean or replace the cation exchange membrane 3021 in the secondary impurity removal box 302, so as to ensure the removal efficiency of ammonia nitrogen in steam condensate by the cation exchange membrane 3021.

[0057] In some embodiments, a level gauge is provided on the water storage tank 400 of this application. The level gauge monitors the level of the stored steam condensate in the water storage tank 400 to facilitate the effective utilization of the steam condensate in the water storage tank 400. Furthermore, the specifications and model of the level gauge can be set according to actual needs, and this application does not specifically limit them.

[0058] In some embodiments, reference Figure 2 and Figure 3 In this application, a first flow regulating valve 502 is provided on the body of the circulating water pipe 500 near the steam condensate recycling device 700; wherein, the first flow regulating valve 502 regulates the flow rate of steam condensate entering the steam condensate recycling device 700 corresponding to the circulating water pipe 500, so as to provide a precise amount of steam condensate to the steam condensate recycling device 700.

[0059] In addition, each branch pipe 501 is equipped with a second flow regulating valve 5011. The second flow regulating valve 5011 regulates the flow rate of steam condensate entering the steam condensate recycling device 700 corresponding to the branch pipe 501, so as to provide a precise amount of steam condensate to the steam condensate recycling device 700.

[0060] In some embodiments, reference Figure 2 and Figure 3 In this application, a second water pump 503 is installed on the pipe body of the circulating water pipe 500 near the steam condensate recycling device 700.

[0061] In the above embodiments, the second water pump 503 provides the additional power for steam condensate to flow from the water storage tank 400 through the circulating water pipe 500 or the branch pipe 501 to the steam condensate recycling device 700. The specifications and model of the second water pump 503 can be set according to actual needs, and this application does not specifically limit it.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A steam condensate recycling system, characterized in that, include: The water collection unit (200), water treatment unit (300), water storage tank (400) and circulating water pipe (500) are connected in sequence through the first pipe (101). The water collection unit (200) is connected to a steam generating device (600) through a second pipe (102) for collecting the condensate water after the steam generated by the steam generating device (600) is condensed. The water treatment unit (300) is used to treat the steam condensate entering therein to remove impurity ions from the steam condensate; The water storage tank (400) is used to store the steam condensate after it has been treated by the water treatment unit (300); The circulating water pipe (500) is connected to multiple branch pipes (501), and the end of the branch pipe (501) away from the water storage tank (400) and the end of the multiple branch pipes (501) away from the circulating water pipe (500) are both used to connect to the steam condensate recycling device (700).

2. The steam condensate recycling system according to claim 1, characterized in that, The water collection unit (200) includes a condenser (201) and a water collection tank (202); The air inlet of the condenser (201) is connected to the steam outlet of the steam generating device (600) through the second pipe (102), and the condensate outlet of the condenser (201) is connected to the water collection tank (202) through the first pipe (101).

3. The steam condensate recycling system according to claim 2, characterized in that, The steam outlet of the steam generating device (600) is connected to the steam waste heat utilization device (800) through the third pipe (103), and the steam outlet of the steam waste heat utilization device (800) is connected to the air inlet of the condenser (201) through the second pipe (102).

4. The steam condensate recycling system according to claim 1, characterized in that, The water treatment unit (300) includes a primary impurity removal box (301) and a secondary impurity removal box (302) that are connected in sequence through the first pipe (101). A first water pump (1011) is installed on the first pipeline (101) between the primary impurity removal box (301) and the water collection unit (200). The primary impurity removal box (301) is filled with a plurality of impurity removal balls (3011). The secondary impurity removal box (302) is equipped with a cation exchange membrane (3021). The diameter of the impurity removal ball (3011) is larger than the diameter of the first pipe (101).

5. The steam condensate recycling system according to claim 4, characterized in that, The impurity removal ball (3011) is made of manganese sand. There are multiple cation exchange membranes (3021), and the multiple cation exchange membranes (3021) are equally spaced in the secondary impurity removal box (302). The cation exchange membranes (3021) are made of cation exchange material.

6. The steam condensate recycling system according to claim 5, characterized in that, A filter screen is provided at one end of the first pipe (101) that is connected to the first-stage impurity removal box (301).

7. The steam condensate recycling system according to claim 4, characterized in that, The top of the primary impurity removal box (301) is sealed with a first cover plate (3012). The top of the secondary impurity removal box (302) is provided with a second cover plate (3022).

8. The steam condensate recycling system according to claim 1, characterized in that, A level gauge is installed on the water storage tank (400).

9. The steam condensate recycling system according to any one of claims 1 to 8, characterized in that, A first flow regulating valve (502) is provided on the body of the circulating water pipe (500) near the steam condensate recycling device (700). Each of the branch pipes (501) is provided with a second flow regulating valve (5011).

10. The steam condensate recycling system according to any one of claims 1 to 8, characterized in that, A second water pump (503) is installed on the pipe body of the circulating water pipe (500) near the steam condensate recycling device (700).

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