Desalted water refining device
Through the combined treatment of reverse osmosis system, degassing tower and electrosalting system, the problem that desalination water cannot meet the standards of dry quenching boilers is solved, and the water quality is significantly improved, meeting the requirements of dry quenching boilers.
Patent Information
- Application Number
- CN202422516439.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-17
AI Technical Summary
The existing purification methods cannot make the desalted water meet the standards for use of dry quenching boilers, especially in terms of hardness, conductivity and SiO2.
The combination of reverse osmosis system, degassing tower, mixed bed system and electrosalt desalt system is adopted to remove dissolved gases and dissolved salts through reverse osmosis treatment, degassing, removing dissolved gases and dissolved salts, combined with electrosalt desalt system to remove ions and improve water quality.
Significantly improve the water quality of desalinated water, so that it meets the standards for use in dry quenching boilers, reduces hardness and conductivity, and reduces SiO2 content.
Smart Images
Figure CN223292410U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of chemical separation technology, and in particular to a desalted water refining device. Background Art
[0002] Desalted water is obtained by removing most suspended solids, colloids, and inorganic impurities such as cations and anions through a specific water treatment process. Due to its high purity, desalted water is widely used in industries such as electronics, medicine, chemicals, and food processing.
[0003] One important use of desalted water is to generate superheated steam for power generation after it is transported to dry coke quenching boilers. Currently, conventional desalted water purification methods involve adding biocides, filtration, pressurization, and RO reverse osmosis (RO) systems. Key water quality indicators include hardness, conductivity, and SiO2. Desalted water treated with current purification methods does not meet the standards for use in dry coke quenching boilers. Summary of the Invention
[0004] The embodiment of the present application provides a desalted water refining device to solve the technical problem that the desalted water purified by the existing purification method cannot meet the use standards of the dry quenching boiler.
[0005] An embodiment of the present application provides a desalted water refining device, which includes: a reverse osmosis system, which is configured to perform reverse osmosis treatment on water after preliminary filtration; a degassing tower, whose inlet is connected to the outlet of the reverse osmosis system and is configured to remove dissolved gases in water; a mixed bed system, whose inlet is connected to the outlet of the degassing tower and is configured to remove dissolved salts in water; and an electro-desalination system, whose inlet is connected to the outlet of the mixed bed system and is configured to remove ions in water.
[0006] In one possible implementation, the reverse osmosis system includes a reverse osmosis security filter, a reverse osmosis high-pressure pump, and a reverse osmosis device that are connected in sequence; a reverse osmosis membrane is installed in the reverse osmosis device, and is configured to perform reverse osmosis treatment on the water after preliminary filtration.
[0007] In one possible implementation, the desalted water refining device also includes: an antiscalant dosing device, which is connected to the inlet of the reverse osmosis safety filter and is used to output the descaling agent; a cleaning safety filter, which is connected to the outlet of the reverse osmosis high-pressure pump and is used to output water for cleaning the reverse osmosis device.
[0008] In one possible implementation, the antiscalant dosing device includes an antiscalant dosing box and an antiscalant metering pump; the antiscalant dosing box is used to be connected to the outlet of the electric desalination system; the inlet of the antiscalant metering pump is connected to the antiscalant dosing box, and the outlet of the antiscalant metering pump is connected to the inlet of the reverse osmosis safety filter.
[0009] In a possible implementation, the electric desalination system includes an electric desalination water supply pump, an electric desalination safety filter, an electric desalination device, and a desalination water tank, which are connected in sequence.
[0010] In a possible implementation, the electric desalination system includes two electric desalination water supply pumps arranged in parallel.
[0011] In a possible implementation, the desalted water refining device further includes: an ammonia dosing device, which is connected to the CDQ water supply pump and is used to output ammonia water.
[0012] In one possible implementation, the ammonia dosing device includes an ammonia dosing box and an ammonia metering pump; the ammonia dosing box is connected to the outlet of the electric desalination system; the inlet of the ammonia metering pump is connected to the ammonia dosing box, and the ammonia metering pump is connected to the outlet of the CDQ water supply pump.
[0013] In a possible implementation, the desalted water refining device further includes: an intermediate water tank connected to the degassing tower; an intermediate water pump, the inlet of the intermediate water pump is connected to the intermediate water tank, and the outlet of the intermediate water pump is connected to the mixed bed system.
[0014] In a possible implementation, the desalted water refining device further includes: a deironing safety filter, which is connected to the production system and is used to remove iron from the medium-pressure water and low-pressure water of the production system and then transport them to the intermediate water tank.
[0015] The technical solutions provided in the embodiments of this application have at least the following technical effects:
[0016] The present invention provides a desalted water refining device comprising a sequentially interconnected reverse osmosis system, a degassing tower, a mixed bed system, and an electro-demineralization system. The reverse osmosis system performs reverse osmosis treatment on water after primary filtration, the degassing tower removes dissolved gases from the water, the mixed bed system removes dissolved salts from the water, and the electro-demineralization system removes ions from the water. The desalted water refining device performs reverse osmosis, degassing, removal of dissolved salts, and deionization on the water after primary filtration, significantly improving the quality of the desalted water to meet the standards for use in dry coke quenching boilers. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0018] Figure 1 A schematic diagram of a desalted water refining device provided in an embodiment of the present application;
[0019] Figure 2 A schematic diagram of the structure of a reverse osmosis system provided in an embodiment of the present application;
[0020] Figure 3 A schematic structural diagram of a scale inhibitor dosing device provided in an embodiment of the present application;
[0021] Figure 4 A schematic diagram of the structure of the iron removal safety filter provided in an embodiment of the present application;
[0022] Figure 5 A schematic diagram of the structure of the electric desalination water supply pump provided in an embodiment of the present application;
[0023] Figure 6 A schematic diagram of the structure of the electric desalination safety filter and the electric desalination device provided in the embodiments of the present application;
[0024] Figure 7 A schematic structural diagram of a desalted water tank provided in an embodiment of the present application;
[0025] Figure 8 This is a schematic diagram of the structure of the ammonia dosing device provided in an embodiment of the present application.
[0026] Description of reference numerals:
[0027] 10-Reverse osmosis system; 11-Reverse osmosis safety filter; 12-Reverse osmosis high-pressure pump; 13-Reverse osmosis device; 20-Degassing tower; 30-Mixed bed system; 31-Mixed bed; 32-Mixed bed water production tank; 40-Electro-dimulation system; 41-Electro-dimulation water supply pump; 42-Electro-dimulation safety filter; 43-Electro-dimulation device; 44-Desalted water tank; 50-Scale inhibitor dosing device; 51-Scale inhibitor dosing box; 52-Scale inhibitor metering pump; 60-Cleaning safety filter; 70-Ammonia dosing device; 71-Ammonia dosing box; 72-Ammonia metering pump; 80-Intermediate water tank; 90-Intermediate water pump; 100-Iron removal safety filter. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0029] In the description of the embodiments of the present application, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0030] The present application embodiment provides a desalted water refining device, such as Figure 1 As shown, the desalted water refining device includes a reverse osmosis system 10, a degassing tower 20, a mixed bed system 30, and an electric desalination system 40, which are connected in sequence. Specifically, the reverse osmosis system 10 is configured to perform reverse osmosis treatment on the water after preliminary filtration; the inlet of the degassing tower 20 is connected to the outlet of the reverse osmosis system 10 and is configured to remove dissolved gases in the water; the inlet of the mixed bed system 30 is connected to the outlet of the degassing tower 20 and is configured to remove dissolved salts in the water; and the inlet of the electric desalination system 40 is connected to the outlet of the mixed bed system 30 and is configured to remove ions in the water.
[0031] The water is initially filtered before entering the desalted water refining device. The initial filtration process of the water includes: ordinary water passes through the pipeline mixer, multi-media filter, ultrafiltration device and activated carbon filter in sequence. Figure 1 As shown, the water flowing out of the main outlet pipe of the activated carbon filter flows into the reverse osmosis system 10 of the desalted water refining device. Among them, the pipeline mixer is used to mix water with flocculants, disinfectants or other treatment agents to remove suspended matter, colloids and tiny particles in the water and perform disinfection. The multi-media filter uses media layers of different particle sizes to remove suspended matter, sediment, rust, microorganisms and organic matter in the water through physical interception. The ultrafiltration device uses a semi-permeable membrane to filter out suspended matter, colloids, microorganisms, large molecular organic matter, etc. in the water, while allowing water molecules and dissolved ions to pass through. The activated carbon filter uses activated carbon as the filter medium and uses the adsorption effect of activated carbon to remove organic matter, chlorine, odor, pigments and some heavy metals in the water.
[0032] Reverse osmosis system 10 uses reverse osmosis membranes under high pressure to remove most dissolved salts, organic matter, microorganisms, and colloidal particles from the water, significantly reducing the total dissolved solids (TDS). Degassing tower 20 removes dissolved gases, such as oxygen and carbon dioxide, from the water after reverse osmosis system 10. Mixed bed system 30 uses exchange resins to remove remaining dissolved salts from the water, bringing the water to ultrapure standards. Electrodeionization system 40 further removes ions from the water through a combination of electric fields and ion exchange resins, including ions that are difficult to remove by mixed bed system 30. Furthermore, mixed bed system 30 can operate continuously without the need for chemical regeneration, helping to reduce operating costs and environmental impact. Water hardness is primarily caused by calcium and magnesium ions. Mixed bed system 30 and electrodeionization system 40 can significantly remove ions from the water, thereby significantly reducing water hardness. Electrical conductivity is a measure of the total amount of dissolved ions in water, and electrodeionization system 40 can significantly reduce electrical conductivity. SiO2 can form difficult-to-remove deposits in boilers, affecting thermal efficiency. Reverse osmosis system 10 and mixed bed system 30 can significantly reduce SiO2 content. Therefore, the desalted water refining device provided in the embodiment of the present application significantly improves the water quality of the desalted water, thereby being able to meet the use standards of the dry quenching boiler.
[0033] like Figure 1 and Figure 2 As shown, the reverse osmosis system 10 in the embodiment of the present application includes a reverse osmosis security filter 11, a reverse osmosis high-pressure pump 12, and a reverse osmosis device 13, which are connected in sequence. The reverse osmosis device 13 is equipped with a reverse osmosis membrane and is configured to perform reverse osmosis treatment on the water after preliminary filtration. For example, the reverse osmosis device 13 is a first-stage reverse osmosis system 10.
[0034] The reverse osmosis safety filter 11, equipped with a fiber filter element, meltblown filter element, or other type of filter media, is installed before the reverse osmosis high-pressure pump 12 to remove suspended solids, particulate matter, and microorganisms from the water, protecting the reverse osmosis membrane from contamination and damage. The reverse osmosis high-pressure pump 12 provides the necessary pressure for the reverse osmosis process, ensuring that water molecules overcome the osmotic pressure and pass through the reverse osmosis membrane within the reverse osmosis unit 13. The reverse osmosis membrane within the reverse osmosis unit 13 has a very small pore size, allowing water molecules to pass through while blocking dissolved salts, colloids, microorganisms, and other large organic molecules.
[0035] like Figure 1 As shown, the water flowing out of the reverse osmosis device 13 goes to the primary reverse osmosis (RO) water production main pipe and returns to the reverse osmosis (RO) cleaning water tank.
[0036] In order to prevent the minerals in the water from scaling in the reverse osmosis system 10 and ensure the filtering effect of the reverse osmosis membrane, Figure 2 and Figure 3As shown, the desalted water refining device provided in the embodiment of the present application also includes a scale inhibitor dosing device 50 and a cleaning safety filter 60; the scale inhibitor dosing device 50 is connected to the inlet of the reverse osmosis safety filter 11 for outputting the descaling agent; the cleaning safety filter 60 is connected to the outlet of the reverse osmosis high-pressure pump 12 for outputting water for cleaning the reverse osmosis device 13.
[0037] After entering the reverse osmosis system 10, the scale inhibitor dissolves and disperses in the water, chemically reacting with hardness ions such as calcium and magnesium in the water to form insoluble compounds. These insoluble compounds are then filtered out by the reverse osmosis safety filter 11. The scale inhibitor also disrupts the growth conditions for scale crystals, preventing or significantly reducing the rate of scale formation.
[0038] The cleaning and safety filter 60 is connected to the outlet of the reverse osmosis high-pressure pump 12 to remove suspended matter, particulate matter, etc. in the water and output water for cleaning the reverse osmosis device 13 to prevent the reverse osmosis membrane from being damaged during the cleaning process.
[0039] like Figure 3 As shown, specifically, the antiscalant dosing device 50 includes an antiscalant dosing box 51 and an antiscalant metering pump 52; the antiscalant dosing box 51 is used to be connected to the outlet of the electric desalination system 40; the inlet of the antiscalant metering pump 52 is connected to the antiscalant dosing box 51, and the outlet of the antiscalant metering pump 52 is connected to the inlet of the reverse osmosis security filter 11.
[0040] The antiscalant dosing tank 51 is used to store the antiscalant solution. It is usually made of corrosion-resistant materials, such as polyethylene or polypropylene, to ensure chemical stability and long life. The capacity of the antiscalant dosing tank 51 is determined according to the scale and dosing frequency of the reverse osmosis system 10 to ensure sufficient supply of antiscalant solution. Figure 3 As shown, the antiscalant dosing tank 51 is equipped with a liquid level sensor to monitor the liquid level in the tank and provide an alarm or automatically replenish antiscalant when the liquid level is too low.
[0041] The antiscalant metering pump 52 is used to pump the antiscalant solution from the antiscalant dosing tank 51 and deliver it to the reverse osmosis system 10, metering the delivered antiscalant solution. The antiscalant metering pump 52 can be mechanically driven or motor-driven, with adjustable stroke length and speed to accommodate different dosing requirements.
[0042] like Figures 5 to 7 As shown, the electric desalination system 40 includes an electric desalination water supply pump 41, an electric desalination safety filter 42, an electric desalination device 43 and a desalted water tank 44 which are connected in sequence.
[0043] The electro-deionization water supply pump 41 provides the necessary water pressure for the electro-deionization system 40, ensuring that water flows through the electro-deionization safety filter 42 and the electro-deionization device 43. The electro-deionization safety filter 42 is used to remove suspended matter and particulate matter in the water and protect the electro-deionization device 43 from contamination. The interior of the electro-deionization device 43 is filled with a mixed ion exchange resin. Under the action of a DC electric field, the ion exchange resin is used to adsorb anions and cations in the water and remove these ions through a selectively permeable anion and cation exchange membrane. At the same time, continuous electrochemical regeneration of the resin is achieved without the use of acid and alkali chemicals, thereby producing ultrapure water with high resistivity. The deionized water tank 44 stores the ultrapure water treated by the electro-deionization device 43 for subsequent use, such as through the dry quenching water supply pump for dry quenching.
[0044] Continue to refer to Figure 5 The electric desalination system 40 includes two electric desalination water supply pumps 41 arranged in parallel. The two electric desalination water supply pumps 41 arranged in parallel, one for use and one for backup, can ensure continuous and stable water supply and operational flexibility of the electric desalination system 40.
[0045] Specifically, when the active electric desalination water supply pump 41 fails or requires planned maintenance, the standby electric desalination water supply pump 41 can be immediately activated to take over the water supply task, thereby ensuring the continuous operation of the electric desalination system 40 and avoiding interruption of the entire water treatment process due to the failure of the electric desalination water supply pump 41. In addition, by alternating the use of the two electric desalination water supply pumps 41, the operating time of a single electric desalination water supply pump 41 can be reduced, thereby reducing wear and tear on the electric desalination water supply pump 41 and extending the service life of the electric desalination water supply pump 41.
[0046] like Figure 1 As shown, mixed bed system 30 includes a mixed bed 31 and a water production tank for mixed bed 31. Mixed bed 31 contains a mixture of anion and cation exchange resins, which efficiently remove residual ions from the water, including sodium, calcium, magnesium, chloride, and silicon. As water flows through mixed bed 31, cations (such as Na+, Ca2+, and Mg2+) are replaced by H+ on the cation resins, while anions (such as Cl- and SO42-) are replaced by OH- on the anion resins. The ions in the water are adsorbed by the resins, thereby purifying the water.
[0047] like Figure 8 As shown, the desalted water refining device provided in the embodiment of the present application further includes an ammonia dosing device 70, which is connected to the CDQ water supply pump for outputting ammonia water.
[0048] Free CO₂ in water makes it acidic, leading to metal corrosion. Ammonia can raise the pH of water, inhibiting H₂ dissociation and controlling metal corrosion. The ammonia dosing device 70 adds ammonia after the CDQ water pump to adjust the pH of the water entering the CDQ water pump and prevent corrosion in the CDQ system.
[0049] Specifically, if Figure 8 As shown, the ammonia dosing device 70 includes an ammonia dosing box 71 and an ammonia metering pump 72; the ammonia dosing box 71 is connected to the outlet of the electric desalination system 40; the inlet of the ammonia metering pump 72 is connected to the ammonia dosing box 71, and the ammonia metering pump 72 is connected to the outlet of the dry quenching water pump.
[0050] The ammonia dosing tank 71 is a container for storing aqueous ammonia. It is usually made of corrosion-resistant materials such as polyethylene or polypropylene to ensure chemical stability and long life. The ammonia metering pump 72 is used to extract the aqueous ammonia from the ammonia dosing tank 71 and deliver it to the CDQ system.
[0051] Further, continue to refer to Figure 1 The desalted water refining device provided in the embodiment of the present application also includes an intermediate water tank 80 and an intermediate water pump 90; the intermediate water tank 80 is connected to the degassing tower 20; the inlet of the intermediate water pump 90 is connected to the intermediate water tank 80, and the outlet of the intermediate water pump 90 is connected to the mixed bed system 30.
[0052] Intermediate water tank 80 stores water treated by degassing tower 20. Serving as a buffer, intermediate water tank 80 balances flow and pressure differences between upstream and downstream processes, ensuring stable operation of the desalinated water refining unit. Intermediate water pump 90 pumps the water stored in intermediate water tank 80 to the mixed bed system 30 for further desalination.
[0053] like Figure 4 As shown, the desalted water refining device provided in the embodiment of the present application also includes an iron removal safety filter 100, which is connected to the production system and is used to remove iron from the medium-pressure water and low-pressure water of the production system and then transport them to the intermediate water tank 80.
[0054] The iron removal safety filter 100 is equipped with various filter media, such as activated carbon and manganese sand, which effectively remove iron and other impurities from the water. After being treated by the iron removal safety filter 100, the medium-pressure and low-pressure water from the production system enters the intermediate water tank 80. It is then processed in the mixed bed system 30 and the electro-deionization system 40 to produce ultrapure water.
[0055] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.
[0056] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.
Claims
1. A desalted water refining device, characterized in that: include: a reverse osmosis system configured to perform reverse osmosis treatment on the preliminarily filtered water; a degassing tower, wherein the inlet of the degassing tower is connected to the outlet of the reverse osmosis system and is configured to remove dissolved gas in water; a mixed bed system, wherein the inlet of the mixed bed system is connected to the outlet of the degassing tower and is configured to remove dissolved salts in water; as well as The inlet of the electric desalination system is connected to the outlet of the mixed bed system and is configured to remove ions in water.
2. The desalted water refining device according to claim 1, characterized in that: The reverse osmosis system includes a reverse osmosis security filter, a reverse osmosis high-pressure pump and a reverse osmosis device which are connected in sequence; The reverse osmosis device is equipped with a reverse osmosis membrane and is configured to perform reverse osmosis treatment on the water after preliminary filtration.
3. The desalted water refining device according to claim 2, characterized in that: Also includes: an antiscalant dosing device, the antiscalant dosing device being connected to the inlet of the reverse osmosis safety filter and being used for outputting the antiscalant; A cleaning safety filter is connected to the outlet of the reverse osmosis high-pressure pump and is used to output water for cleaning the reverse osmosis device.
4. The desalted water refining device according to claim 3, characterized in that: The antiscalant dosing device includes an antiscalant dosing box and an antiscalant metering pump; The antiscalant dosing box is used to be connected to the outlet of the electric desalination system; The inlet of the antiscalant metering pump is connected to the antiscalant dosing tank, and the outlet of the antiscalant metering pump is connected to the inlet of the reverse osmosis security filter.
5. The desalted water refining device according to claim 1, characterized in that: The electric desalination system comprises an electric desalination water supply pump, an electric desalination safety filter, an electric desalination device and a desalination water tank which are connected in sequence.
6. The desalted water refining device according to claim 5, characterized in that: The electric desalination system includes two electric desalination water supply pumps arranged in parallel.
7. The desalted water refining device according to claim 1, characterized in that: Also includes: An ammonia dosing device is connected to the CDQ water supply pump and is used to output ammonia water.
8. The desalted water refining device according to claim 7, characterized in that: The ammonia dosing device includes an ammonia dosing box and an ammonia metering pump; The ammonia dosing box is connected to the outlet of the electric desalination system; The inlet of the ammonia metering pump is connected to the ammonia dosing tank, and the ammonia metering pump is connected to the outlet of the CDQ water supply pump.
9. The desalted water refining device according to claim 1, characterized in that: Also includes: an intermediate water tank connected to the degassing tower; An intermediate water pump, wherein the inlet of the intermediate water pump is connected to the intermediate water tank, and the outlet of the intermediate water pump is connected to the mixed bed system.
10. The desalted water refining device according to claim 9, characterized in that: Also includes: The iron removal safety filter is connected to the production system and is used to remove iron from the medium-pressure water and low-pressure water of the production system and then transport them to the intermediate water tank.