Power workshop boiler room water treatment system

Abstract

The invention discloses a power workshop boiler room water treatment system which comprises a pretreatment unit, a reverse osmosis treatment unit, an EDI treatment unit and an effluent delivery unit, the pretreatment unit is used for pretreating raw water through a dosing device and a filtering device of the pretreatment unit, outputting filtered water and delivering the filtered water to the reverse osmosis treatment unit; the reverse osmosis treatment unit is used for performing reverse osmosis treatment on the filtered water through a two-stage RO treatment unit and conveying secondary pure water subjected to reverse osmosis treatment to the EDI treatment unit; the EDI treatment unit is used for performing electrodeionization ultrapure water treatment on the reverse osmosis treatment water and conveying the treated ultrapure water to a boiler deaerator through an effluent conveying unit. The system has the beneficial effects that through integrated automatic control and an advanced water treatment technology, highly automatic operation is realized, the stability of effluent quality is ensured, and the safety and efficiency of boiler operation are improved.

Description

Technical field: The invention relates to the technical field of sewage treatment, and in particular to a water treatment system for a boiler room in a power plant. Background technology: With the rapid development of industrial production, boilers, as important energy conversion equipment, play a vital role in the power, chemical, metallurgical and other industries. The operating efficiency and safety of the boiler are directly related to the stability and economy of the entire industrial system. The quality of boiler feed water is one of the key factors affecting its safe operation. Therefore, the boiler room water treatment system has become a necessary condition to ensure the safe and efficient operation of the boiler.

[0003] Traditional boiler room water treatment systems usually use ion exchange technology to soften the feed water by running a hydrogen ion exchanger in parallel with a sodium ion exchanger. However, these systems have some limitations: when the water in the two ion exchangers is not adjusted properly, it is easy to cause the pH alkalinity of the outlet water to be low and the hardness to exceed the standard, affecting the safe operation of the boiler. Traditional water treatment systems often generate a large amount of wastewater discharge, which not only wastes water resources, but also may pollute the environment.

[0004] Although there have been some improvement measures for the above problems, most of the improvements are still limited to the optimization of a single technology and lack a systematic solution. Therefore, developing an efficient, automated and environmentally friendly boiler room water treatment system is of great significance for improving boiler operation efficiency, reducing operating costs and reducing environmental pollution. Summary of the invention: The purpose of the embodiment of the present application is to provide a water treatment system for a boiler room in a power plant, which solves the problems of low degree of automation, unstable water quality, waste of resources and environmental pollution in boiler room water treatment, and realizes efficient, stable and environmentally friendly boiler feed water treatment.

[0006] The embodiment of the present application provides a water treatment system for a power plant boiler room, comprising: a pretreatment unit, a reverse osmosis treatment unit, an EDI treatment unit and a water outlet delivery unit, wherein: The pretreatment unit is used to pretreat the raw water through its dosing device and filtering device, output filtered water, and transport the filtered water to the reverse osmosis treatment unit; The reverse osmosis treatment unit is used to perform reverse osmosis treatment on the filtered water through the two-stage RO treatment unit, and to transport the secondary pure water after the reverse osmosis treatment to the EDI treatment unit; The EDI treatment unit is used to treat the reverse osmosis treated water with electrodeionized ultrapure water, and transport the treated ultrapure water to the boiler deaerator through the outlet water transport unit.

[0007] Preferably, the pretreatment unit also includes a raw water tank, a heat exchanger and a raw water booster pump; the raw water tank is used to store raw water, and the raw water tank is connected to the heat exchanger, the raw water booster pump and the filtering device in sequence.

[0008] Preferably, the filtering device includes a sand filter, a carbon filter, a first safety filter and a filter water tank; the sand filter filters the raw water delivered by the raw water booster pump and is sequentially connected to the carbon filter, the first safety filter and the filter water tank.

[0009] Preferably, the dosing device is used to add flocculants before filtering by the filtering device, and to add bactericides and oxidants after filtering by the carbon filter.

[0010] Preferably, the dosing device includes a chemical storage tank, a water quality detection sensor and an automatic control system; the water quality detection sensor is arranged in the water outlet pipe of the raw water booster pump and the carbon filter, and is connected to the automatic control system. The automatic control system calculates the amount of chemical to be added based on the data sent back by the water quality detection sensor, and controls the valve of the chemical storage tank to release the chemical according to the amount of chemical to be added.

[0011] Preferably, the reverse osmosis treatment unit includes a primary RO treatment unit and a secondary RO treatment unit; the primary RO treatment unit includes a primary high-pressure pump, a primary RO module and a primary RO water tank; the primary high-pressure pump is connected to the water outlet of the filter water tank, and is sequentially connected to the primary RO module and the primary RO water tank; the primary pure water treated by the primary RO module is stored in the primary RO water tank; The secondary RO treatment unit includes a secondary high-pressure pump, a secondary RO module and a secondary RO water tank; the secondary high-pressure pump is connected to the water outlet of the primary RO water tank, and is connected to the secondary RO module and the secondary RO water tank at one time; the secondary pure water treated by the secondary RO module is stored in the secondary RO water tank.

[0012] Preferably, the reverse osmosis treatment unit further comprises a pH regulating device, which is used to collect water quality data in the primary RO water tank and to adjust the pH value by adding reagents into the primary RO water tank.

[0013] Preferably, the EDI processing unit includes: a second security filter, an EDI pump, an EDI host and an EDI water tank; the second security filter is connected to the secondary RO water tank, and is sequentially connected to the EDI pump, the EDI host and the EDI water tank, and the EDI host stores ultrapure water in the EDI water tank after processing.

[0014] Preferably, the system also includes: a sewage treatment system; the sewage treatment system is used to transport the primary concentrated water discharged after treatment by the primary RO treatment unit to the filter water tank, and transport the secondary concentrated water discharged after treatment by the secondary RO treatment unit and the EDI concentrated water discharged after treatment by the EDI treatment unit to the raw water tank.

[0015] The power workshop boiler room water treatment system provided in this application achieves highly automated operation through integrated automated control and advanced water treatment technology, ensures the stability of the outlet water quality, and improves the safety and efficiency of boiler operation; at the same time, by optimizing the equipment layout and process flow, it reduces energy consumption, reduces the use of chemical agents, and achieves zero sewage discharge, thereby reducing the impact on the environment, saving water resources, reducing the operating costs of the enterprise, and improving the overall economic benefits and environmental sustainability. Description of the drawings: Figure 1 It is a structural schematic diagram of a water treatment system for a power plant boiler room provided in an embodiment of the present application; Figure 2 is a schematic diagram of the structure of a preprocessing unit provided in an embodiment of the present application; Figure 3 is a schematic structural diagram of a reverse osmosis treatment unit provided in an embodiment of the present application; Figure 4 It is a structural diagram of an EDI processing unit provided in an embodiment of the present application; Figure 5 It is a structural schematic diagram of a sewage treatment unit provided in an embodiment of the present application.

[0017] Among them: 1-pretreatment unit, 2-reverse osmosis treatment unit, 3-EDI treatment unit, 4-water delivery unit, 5-control system, 101-raw water tank, 102-heat exchanger, 103-raw water booster pump, 104-dosing device, 105-filtering device, 1051-sand filter, 1052-carbon filter, 1053-first security filter, 1054-filtered water tank, 201-first-level RO treatment unit, 2011-first-level high-pressure pump, 2012-first-level RO module, 2013-first-level RO water tank, 202-second-level RO treatment unit, 2021-second-level high-pressure pump, 2022-second-level RO module, 2023-second-level RO water tank, 203-PH adjustment device, 301-second security filter, 302-EDI pump, 303-EDI host, 304-EDI water tank. Specific implementation method: The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0019] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0020] The power plant boiler room water treatment system provided by the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0021] Figure 1 Schematic diagram of the water treatment system structure of the power plant boiler room provided in the embodiment of the present application. Figure 1 As shown, the water treatment system of the boiler room of the power workshop includes: a pretreatment unit 1, a reverse osmosis treatment unit 2, an EDI treatment unit 3 and an outlet water delivery unit 4, wherein the pretreatment unit 1 is used to pretreat the raw water through its dosing device 104 and the filtering device 105, output the filtered water, and deliver the filtered water to the reverse osmosis treatment unit 2; the reverse osmosis treatment unit 2 is used to reverse osmosis treat the filtered water through a two-stage RO treatment unit, and deliver the secondary pure water after the reverse osmosis treatment to the EDI treatment unit 3; the EDI treatment unit 3 is used to perform electrodeionization ultrapure water treatment on the reverse osmosis treated water, and deliver the treated ultrapure water to the boiler deaerator through the outlet water delivery unit 4.

[0022] Specifically, the boiler room water treatment system includes a pretreatment unit 1, a reverse osmosis treatment unit 2, an EDI treatment unit 3 and an outlet water delivery unit 4. These units are interconnected through pipelines and control lines to form a complete water treatment process.

[0023] The pretreatment unit 1 further includes a raw water tank 101, a heat exchanger 102 and a raw water booster pump 103; the raw water tank 101 is used to store raw water, and the raw water tank 101 is sequentially connected to the heat exchanger 102, the raw water booster pump 103 and the filter device 105. The filter device 105 includes a sand filter 1051, a carbon filter 1052, a first security filter 1053 and a filtered water tank 1054; the sand filter 1051 filters the raw water delivered by the raw water booster pump 103, and is sequentially connected to the carbon filter 1052, the first security filter 1053 and the filtered water tank 1054. The dosing device 104 is used to add flocculants before filtering by the filter device 105, and to add bactericides and oxidants after filtering by the carbon filter 1052. The dosing device 104 includes a chemical storage tank, a water quality detection sensor and an automatic control system 5; the water quality detection sensor is arranged in the water outlet pipe of the raw water booster pump 103 and the carbon filter 1052, and is connected to the automatic control system 5. The automatic control system 5 calculates the amount of chemical to be added based on the data sent back by the water quality detection sensor, and controls the valve of the chemical storage tank to add chemical according to the amount of chemical added.

[0024] The raw water first enters the raw water tank 101 for storage. The raw water passes through the heat exchanger 102 for temperature adjustment to meet the requirements of subsequent treatment. The raw water booster pump 103 increases the water pressure to ensure that the water flows through the subsequent filter device 105. The dosing device 104 adds flocculants before filtration to help settle and remove suspended matter. The water treated with flocculants passes through the sand filter 1051 to remove suspended particles, and then passes through the carbon filter 1052 to remove organic matter and chlorine. The first security filter 1053 further ensures water quality and removes particles that may be missed. The filtered water is stored in the filtered water tank 1054, ready for the next step of treatment.

[0025] The reverse osmosis treatment unit 2 includes a primary RO treatment unit 201 and a secondary RO treatment unit 202; the primary RO treatment unit 201 includes a primary high-pressure pump 2011, a primary RO module 2012 and a primary RO water tank 2013; the primary high-pressure pump 2011 is connected to the water outlet of the filtered water tank 1054, and is sequentially connected to the primary RO module and the primary RO water tank 2013; the primary pure water treated by the primary RO module 2012 is stored in the primary RO water tank 2013; the secondary RO treatment unit 202 includes a secondary high-pressure pump 2021, a secondary RO module 2022 and a secondary RO water tank 2023; the secondary high-pressure pump 2021 is connected to the water outlet of the primary RO water tank 2013, and is once connected to the secondary RO module and the secondary RO water tank 2023; the secondary pure water treated by the secondary RO module 2022 is stored in the secondary RO water tank 2023. The reverse osmosis treatment unit 2 further includes a pH adjustment device 203 , which is used to collect water quality data in the primary RO water tank 2013 and adjust the pH value by adding reagents into the primary RO water tank 2013 .

[0026] The primary high-pressure pump 2011 draws water from the filtered water tank 1054 and inputs it into the primary RO module 2012 for reverse osmosis treatment. The primary pure water treated by the primary RO module 2012 is stored in the primary RO water tank 2013. The secondary high-pressure pump 2021 draws primary pure water from the primary RO water tank 2013 and inputs it into the secondary RO module 2022 for further treatment. The secondary pure water treated by the secondary RO module 2022 is stored in the secondary RO water tank 2023. The pH adjustment device 203 automatically adjusts the pH value according to the water quality data to ensure stable water quality.

[0027] The EDI processing unit 3 includes: a second security filter 301, an EDI pump 302, an EDI host 303 and an EDI water tank 304; the second security filter 301 is connected to the secondary RO water tank 2023, and is connected to the EDI pump 302, the EDI host 303 and the EDI water tank 304 in sequence, and the EDI host 303 stores ultrapure water in the EDI water tank 304 after processing.

[0028] The second security filter 301 performs the final filtration on the secondary pure water in the secondary RO water tank 2023. The EDI pump 302 delivers the filtered water to the EDI host 303 for electrodeionization. The ultrapure water treated by the EDI host 303 is stored in the EDI water tank 304 and is ready to be delivered to the boiler deaerator.

[0029] The water treatment system of the boiler room of the power workshop also includes: a sewage treatment system; the sewage treatment system is used to transport the primary concentrated water discharged after treatment by the primary RO treatment unit 201 to the filter water tank 1054, and transport the secondary concentrated water discharged after treatment by the secondary RO treatment unit 202 and the EDI concentrated water discharged after treatment by the EDI treatment unit 3 to the raw water tank 101.

[0030] The sewage treatment system is responsible for recycling and reusing the concentrated water discharged from each level of treatment units. The primary concentrated water discharged from the primary RO treatment unit 201 is transported to the filter water tank 1054 for water replenishment in the pre-treatment stage. The concentrated water discharged from the secondary RO treatment unit 202 and the EDI treatment unit 3 is transported to the raw water tank 101 for subsequent reverse osmosis treatment to achieve the recycling of water resources.

[0031] The primary concentrated water enters the filter water tank 1054, the secondary concentrated water enters the raw water tank 101, the EDI concentrated water enters the raw water tank 101, the primary produced water enters the primary water tank, the secondary produced water enters the secondary water tank, and the EDI produced water enters the EDI water tank 304. The concentration and recovery rate of concentrated water are strictly controlled throughout the process to achieve the purpose of zero discharge, saving a lot of resources for customers in actual operation and effectively reducing environmental pollution. Wastewater zero discharge technology can not only enable enterprises to achieve the purpose of protecting the environment, but also improve the benefits of water production.

[0032] The second significance of using zero wastewater discharge technology is that it can greatly reduce water consumption. Zero wastewater discharge can recycle wastewater, thereby effectively reducing the use of fresh water, and can reduce the scale of physical and chemical treatment through zero discharge treatment, which is conducive to reducing the water consumption of enterprises, thereby achieving the problem of saving water resources.

[0033] The third significance of using wastewater zero discharge technology is that it can save the production and operation costs of enterprises. Wastewater zero discharge technology can timely iterate and update the process, so it can effectively solve the problems that arise in the operation of the wastewater zero discharge system, thereby extending the overall operation cycle of the system, improving the system's reuse efficiency, and reducing the overall system investment capital, thereby bringing long-term and effective economic benefits to the enterprise.

[0034] Operation of the outlet water delivery unit 4: Ultrapure water is delivered to the boiler deaerator at constant pressure through the variable frequency constant pressure delivery unit to ensure the quality of boiler feed water.

[0035] Automatic control system 5: The whole system is monitored and operated by the DCS distributed centralized control system 5, achieving a high degree of automation. The water quality detection sensor monitors the water quality parameters in the outlet pipe of the raw water booster pump 103 and the carbon filter 1052 in real time, and transmits the data to the automatic control system 5. The automatic control system 5 calculates the required amount of reagent according to the water quality data, and controls the valve of the reagent storage tank for precise delivery. The system realizes remote monitoring operation, and the operator can monitor the entire water treatment process in the central control room, including the start and stop of the equipment, water tank replenishment, reverse osmosis and EDI water flushing, etc.

[0036] High degree of automation: in accordance with the concept of system continuity (the original system is the HOLLiAS MACS-K system), all data of this project are transmitted remotely from the DCS to the central control room of the aluminum plant, and finally monitored and operated in the central control room, such as the start and stop of each water pump, the start and stop of each dosing device 104, the water tank replenishment, the reverse osmosis water flushing, the EDI water flushing, the video monitoring screen switching, the night light switch, etc., and the various water treatment monitoring data screens are displayed synchronously, truly realizing the goal of unmanned operation and remote monitoring operation. Except for the daily consumed chemicals that need to be manually added to the dosing box and the filter element that is manually replaced regularly, all other operations are automated, with an automation degree of up to 99%.

[0037] Through the above implementation, the power workshop boiler room water treatment system of the present invention can efficiently and stably treat boiler feed water, ensure the safe operation of the boiler, and achieve water resource conservation and environmental protection. The design of the system takes into account the convenience of operation, simplicity of maintenance and safety of the system, and is suitable for power workshop boiler rooms of various sizes.

[0038] It should be noted that, in this article, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited, and the functions are performed in the order shown or discussed, and may also include performing the functions in a substantially simultaneous manner or in the opposite order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0039] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A water treatment system for a power plant boiler room, characterized in that: include: Pretreatment unit, reverse osmosis treatment unit, EDI treatment unit and effluent transport unit, wherein: The pretreatment unit is used to pretreat the raw water through its dosing device and filtering device, output filtered water, and transport the filtered water to the reverse osmosis treatment unit; The reverse osmosis treatment unit is used to perform reverse osmosis treatment on the filtered water through the two-stage RO treatment unit, and to transport the secondary pure water after the reverse osmosis treatment to the EDI treatment unit; The EDI processing unit is used to perform electrodeionization ultrapure water treatment on the reverse osmosis treated water, and to transport the treated ultrapure water to the boiler deaerator through the outlet water transport unit.

2. The power plant boiler room water treatment system according to claim 1 is characterized in that: The pretreatment unit also includes a raw water tank, a heat exchanger and a raw water booster pump; the raw water tank is used to store raw water, and the raw water tank is connected to the heat exchanger, the raw water booster pump and the filtering device in sequence.

3. The power plant boiler room water treatment system according to claim 2, characterized in that: The filtering device includes a sand filter, a carbon filter, a first safety filter and a filter water tank; the sand filter filters the raw water delivered by the raw water booster pump and is connected to the carbon filter, the first safety filter and the filter water tank in sequence.

4. The power plant boiler room water treatment system according to claim 1 is characterized in that: The dosing device is used to add flocculants before filtering by the filtering device, and to add bactericides and oxidants after filtering by the carbon filter.

5. The power plant boiler room water treatment system according to claim 4 is characterized in that: The dosing device includes a chemical storage tank, a water quality detection sensor and an automatic control system; the water quality detection sensor is arranged in the water outlet pipe of the raw water booster pump and the carbon filter, and is connected to the automatic control system. The automatic control system calculates the amount of chemical to be added based on the data sent back by the water quality detection sensor, and controls the valve of the chemical storage tank to add chemical according to the amount of chemical to be added.

6. The power plant boiler room water treatment system according to claim 1, characterized in that: The reverse osmosis treatment unit includes a primary RO treatment unit and a secondary RO treatment unit; the primary RO treatment unit includes a primary high-pressure pump, a primary RO module and a primary RO water tank; the primary high-pressure pump is connected to the water outlet of the filter water tank, and is sequentially connected to the primary RO module and the primary RO water tank; the primary pure water treated by the primary RO module is stored in the primary RO water tank; The secondary RO treatment unit includes a secondary high-pressure pump, a secondary RO module and a secondary RO water tank; the secondary high-pressure pump is connected to the water outlet of the primary RO water tank and is connected to the secondary RO module and the secondary RO water tank at one time; the secondary pure water treated by the secondary RO module is stored in the secondary RO water tank.

7. The water treatment system for a power plant boiler room according to claim 6, characterized in that: The reverse osmosis treatment unit also includes a pH adjustment device, which is used to collect water quality data in the primary RO water tank and adjust the pH value by adding a reagent into the primary RO water tank.

8. The power plant boiler room water treatment system according to claim 6, characterized in that: The EDI processing unit includes: a second security filter, an EDI pump, an EDI host and an EDI water tank; the second security filter is connected to the secondary RO water tank, and is sequentially connected to the EDI pump, the EDI host and the EDI water tank, and the EDI host stores ultrapure water in the EDI water tank after processing.

9. The power plant boiler room water treatment system according to claim 8, characterized in that: Also includes: Sewage treatment system; the sewage treatment system is used to transport the primary concentrated water discharged after treatment by the primary RO treatment unit to the filter water tank, and to transport the secondary concentrated water discharged after treatment by the secondary RO treatment unit and the EDI concentrated water discharged after treatment by the EDI treatment unit to the raw water tank.

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