Treatment device for reducing hardness and TDS (total dissolved solids) in coal gasification circulating water
By combining a cyclone separator, a disc filter, and an ion exchange assembly, the problems of hardness and unstable TDS in coal gasification circulating water were solved, enabling long-term stable operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGXIA BAOLI TECH DESIGN INST CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-05-12
AI Technical Summary
The hardness and total dissolved solids (TDS) of the coal gasification circulating water are unstable, leading to frequent equipment maintenance and making it impossible to operate stably for a long period of time.
The device employs a combination of components including a cyclone separator, a disc filter, a chemical softening reaction zone, and an ion exchange fine filtration module. The cyclone separator removes large suspended particles, the disc filter intercepts fine suspended particles, the chemical softening reaction generates insoluble precipitates, and the ion exchange module adsorbs Ca2+ and Mg2+ ions, achieving multi-layer purification to reduce hardness and TDS.
It effectively reduces the hardness and TDS of coal gasification circulating water, reduces equipment scaling, and ensures long-term stable operation of the unit.
Smart Images
Figure CN224226845U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal gasification circulating water treatment technology, and in particular to a treatment device for reducing hardness and TDS in coal gasification circulating water. Background Technology
[0002] In the coal-to-ethylene glycol industry, the water used in the gasification process mainly comes from demineralized water, medium-pressure boiler feedwater, and some recycled water. The demineralized water and recycled water are used as makeup water for the gasification circulating water system. The medium-pressure boiler feedwater, after passing through a scrubbing tower and quench water filter, enters the gasifier as quench water. Finally, the circulating water and quench water undergo primary flash evaporation, secondary flash evaporation, tertiary flash evaporation, and sedimentation in a clarifier to obtain the gasification circulating water.
[0003] Currently, the hardness and total dissolved solids (TDS) of coal gasification circulating water are 1115-4180 mg / L (normal value: 1800 mg / L) and 2135-4830 mg / L (normal value: 2500 mg / L), respectively. Due to the instability of hardness and TDS in coal gasification circulating water, and the frequent occurrence of high values, the maintenance frequency of equipment such as heat exchangers, dehumidifiers, pumps, and tubular Venturi scrubbers through which the circulating water flows increases frequently, making it impossible to ensure the long-term stable operation of the entire system. Therefore, we propose a treatment device to reduce the hardness and TDS in coal gasification circulating water to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a treatment device for reducing the hardness and TDS in coal gasification circulating water, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A treatment device for reducing hardness and TDS in coal gasification circulating water includes two support plates. A fine filter box is fixedly connected to one side of the two support plates that are close to each other. A chemical softening reaction tank is also fixedly connected to one side of the two support plates that are close to each other. An observation port is provided on the upper surface of the fine filter box, and a sealing cover is installed on the inner side wall of the observation port. A display screen is fixedly installed on the front of the fine filter box. Two connecting bends are fixedly connected to the upper surface of the fine filter box. Two reagent injection tanks are fixedly connected to one end of the two connecting bends that are close to each other. Multiple injection heads are fixedly connected to the outer surface of each connecting bend. A sludge discharge tank is fixedly connected to one side of the two support plates that are close to each other. A chemical softening reaction tank is fixedly installed on the front of the sludge discharge tank. The system is equipped with a disc filter. A sludge discharge pipe is fixedly connected to the bottom of the sludge discharge tank, and a sludge discharge valve is fixedly connected to the outer surface of the sludge discharge pipe. A vortex mixer is fixedly connected to the inner wall of the fine filter tank. An ion exchange fine filter assembly is fixedly connected to the inner wall of the chemical softening reaction tank. A connecting pipe is fixedly connected to the bottom of both the fine filter tank and the chemical softening reaction tank. The bottom end of the connecting pipe passes through the sludge discharge tank and extends into its interior. A solenoid valve is fixedly connected to the outer surface of the connecting pipe. Two swirl plates are fixedly installed inside the sludge discharge tank. A suspended solids removal layer is fixedly connected to the inner wall of the sludge discharge tank. A sedimentation plate is fixedly connected to the inner wall of the sludge discharge tank. A conical settling groove is formed on the upper surface of the sedimentation plate, and the fine filter tank is located above the sludge discharge tank.
[0007] In a further embodiment, two support recesses are fixedly connected to the upper surface of the fine filter box, and the inner walls of the two sets of support recesses are fixedly connected to the outer surface of the drug spraying can.
[0008] In a further embodiment, the bottom surface of the sewage box is fixedly connected to two supporting inclined blocks, and the two supporting inclined blocks are respectively fixedly connected to the side of the support plate that is close to each other.
[0009] In a further embodiment, each of the support plates has two mounting holes on its upper surface, and each mounting hole has a threaded inner ring.
[0010] In a further embodiment, a stabilizing plate is fixedly connected to the bottom surface of the sewage box, and the inner sidewall of the stabilizing plate is fixedly connected to the outer surface of the sludge discharge pipe.
[0011] In a further embodiment, two guide blocks are fixedly connected to the inner bottom wall of the fine filter box, and the top of each guide block is fixedly connected to the bottom surface of the ion exchange fine filter assembly. The ion exchange fine filter assembly includes an activated carbon layer, a zeolite layer and a chelating resin layer.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] The swirling plate (tangential inlet) throws large suspended particles against the device wall and causes them to settle into the conical settling tank, effectively intercepting large impurities. Next, the water flows through a disc filter, whose pore size gradually decreases from 100μm to 50μm to 10μm, further intercepting fine suspended particles. The swirling plate and disc filter remove these fine suspended particles. In the chemical softening reaction zone, a vortex mixer thoroughly mixes the water, promoting the removal of calcium and impurities. 2+ and Mg 2+ The reaction with the chemicals forms an insoluble precipitate. Using a connecting bend, a chemical injection tank, and an injection head, chemicals such as Na₂CO₃ and PAC are precisely injected into the vortex mixer, reducing water hardness by removing calcium and magnesium ions. Subsequently, the water flows into the ion exchange and fine filtration components, where the activated carbon layer adsorbs dissolved organic matter, the zeolite layer traps micron-sized particles, and the chelating resin layer selectively adsorbs residual calcium ions. 2+ and Mg 2+ Ions are adsorbed through an activated carbon layer (organic matter adsorption), a zeolite layer (micron-sized particle retention), and a chelating resin Ca. 2+ / Mg 2+ Adsorption further reduces the hardness and TDS of the water. Finally, the water, purified through multiple layers, is discharged through the connecting pipe, successfully reducing the hardness and TDS of the coal gasification circulating water. This reduces the pressure of the ash water discharged from the gasification process on the reverse osmosis membrane in the downstream process, and also reduces the scaling of the recycled ash water on equipment such as heat exchangers and venturi tubes, ensuring the long-term stable operation of each unit. Attached Figure Description
[0014] Figure 1 A three-dimensional structural diagram of a treatment device for reducing hardness and TDS in coal gasification circulating water.
[0015] Figure 2 A bottom view of the drain box in a treatment device for reducing hardness and TDS in coal gasification circulating water.
[0016] Figure 3 A cross-sectional schematic diagram of the fine filter box and the sludge discharge box in a treatment device for reducing hardness and TDS in coal gasification circulating water.
[0017] Figure 4 A cross-sectional schematic diagram of the ion exchange fine filtration component in a treatment device for reducing hardness and TDS in coal gasification circulating water.
[0018] In the diagram: 1. Support plate; 2. Fine filter box; 3. Display screen; 4. Observation port; 5. Connecting bend; 6. Chemical spray tank; 7. Spray head; 8. Support recess; 9. Sewage tank; 10. Disc filter; 11. Support inclined block; 12. Mounting hole; 13. Sludge discharge pipe; 14. Sludge discharge valve; 15. Stabilizing plate; 16. Vortex mixer; 17. Ion exchange fine filter assembly; 1701. Activated carbon layer; 1702. Zeolite layer; 1703. Chelating resin layer; 18. Guide block; 19. Connecting pipe; 20. Swirl plate; 21. Suspended solids removal layer; 22. Sedimentation plate; 23. Conical settling tank; 24. Cover plate; 25. Chemical softening reaction box. Detailed Implementation
[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1-4This utility model discloses a treatment device for reducing hardness and TDS in coal gasification circulating water, comprising two support plates 1. A fine filter box 2 is fixedly connected to one side of the two support plates 1 that is close to each other. A chemical softening reaction box 25 is fixedly connected to one side of the two support plates 1 that is close to each other. An observation port 4 is provided on the upper surface of the fine filter box 2, and a sealing cover plate 24 is installed on the inner side wall of the observation port 4. A display screen 3 is fixedly installed on the front of the fine filter box 2. Two connecting bends 5 are fixedly connected to the upper surface of the fine filter box 2. Two reagent spray tanks 6 are fixedly connected to one end of the two connecting bends 5 that is close to each other. Multiple spray heads 7 are fixedly connected to the outer surface of each connecting bend 5. A drain box 9 is fixedly connected to one side of the two support plates 1 that is close to each other. A stacked filter plate is fixedly installed on the front of the drain box 9. The bottom surface of the filter 10 and the sewage tank 9 is fixedly connected to the sludge discharge pipe 13, and the outer surface of the sludge discharge pipe 13 is fixedly connected to the sludge discharge valve 14. The inner wall of the fine filter box 2 is fixedly connected to the vortex mixer 16, and the inner wall of the chemical softening reaction box 25 is fixedly connected to the ion exchange fine filter assembly 17. The bottom surface of the fine filter box 2 and the bottom surface of the chemical softening reaction box 25 are both fixedly connected to the connecting pipe 19. The bottom end of the connecting pipe 19 passes through the sewage tank 9 and extends into the interior of the sewage tank 9. The outer surface of the connecting pipe 19 is fixedly connected to the solenoid valve. Two swirl plates 20 are fixedly installed inside the sewage tank 9. The inner wall of the sewage tank 9 is fixedly connected to the suspended solids removal layer 21. The inner wall of the sewage tank 9 is fixedly connected to the sedimentation plate 22. The upper surface of the sedimentation plate 22 is provided with a conical settling groove 23, and the fine filter box 2 is located above the sewage tank 9.
[0023] Two support recesses 8 are fixedly connected to the upper surface of the fine filter box 2. The inner walls of the two sets of support recesses 8 are fixedly connected to the outer surface of the agent spray tank 6. The support recesses 8 facilitate the support of the agent spray tank 6. Two support inclined blocks 11 are fixedly connected to the bottom surface of the sewage discharge box 9. The side of the two support inclined blocks 11 that are far apart from each other is fixedly connected to the side of the support plate 1 that is close to each other. The support inclined blocks 11 facilitate the support of the sewage discharge box 9. Two mounting holes 12 are opened on the upper surface of each support plate 1. The inner ring of each mounting hole 12 is threaded. The mounting holes 12 facilitate the installation of the support plate 1.
[0024] A stabilizing plate 15 is fixedly connected to the bottom surface of the sewage discharge box 9. The inner wall of the stabilizing plate 15 is fixedly connected to the outer surface of the sludge discharge pipe 13. The stabilizing plate 15 facilitates the reinforcement of the sludge discharge pipe 13. Two guide blocks 18 are fixedly connected to the inner bottom wall of the fine filter box 2. The top of each guide block 18 is fixedly connected to the bottom surface of the ion exchange fine filter assembly 17. The ion exchange fine filter assembly 17 includes an activated carbon layer 1701, a zeolite layer 1702, and a chelating resin layer 1703. The activated carbon layer 1701 adsorbs dissolved organic matter, the zeolite layer 1702 intercepts micron-sized particles, and finally the chelating resin layer 1703 selectively adsorbs residual Ca. 2+ and Mg 2+ Ions further reduce water hardness and TDS.
[0025] The working principle of this utility model is as follows:
[0026] In operation, circulating water first enters the suspended solids removal layer tangentially through the swirl plate 20. Centrifugal force throws large suspended solids against the device wall and causes them to settle into the conical settling tank 23, achieving initial suspended solids removal. The water then flows through a disc filter, whose pore size gradually decreases from 100μm to 50μm to 10μm, further intercepting fine suspended solids and significantly reducing water turbidity. Next, the water enters the chemical softening zone, where it is thoroughly mixed by the vortex mixer 16, promoting the removal of calcium and other pollutants from the water. 2+ and Mg 2+ The water reacts with the chemicals to form an insoluble precipitate. Connecting the bend 5, the chemical injection tank 6, and the injection head 7, the chemical agents, such as Na2CO3 and PAC, are precisely injected into the vortex mixer 16 to reduce water hardness. The water then flows into the sedimentation plate 22 and is further filtered through inclined tube sedimentation to remove the precipitate. Finally, the chemically softened water enters the ion exchange and fine filtration components. First, dissolved organic matter is adsorbed by the activated carbon layer 1701, then micron-sized particles are retained by the zeolite layer 1702, and finally, residual Ca is selectively adsorbed by the chelating resin layer 1703. 2+ and Mg 2+ Ions further reduce the hardness and TDS of the water; finally, the water that has been purified through multiple layers is discharged through the connecting pipe 19, achieving an effective reduction in the hardness and TDS of the coal gasification circulating water and ensuring the long-term stable operation of the unit.
[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A treatment device for reducing hardness and TDS in coal gasification circulating water, characterized in that: The system includes two support plates (1), with a fine filter box (2) fixedly connected to one side of the two support plates (1) that are close to each other. A chemical softening reaction box (25) is also fixedly connected to one side of the two support plates (1) that are close to each other. An observation port (4) is provided on the upper surface of the fine filter box (2), and a sealing cover plate (24) is installed on the inner wall of the observation port (4). A display screen (3) is fixedly installed on the front of the fine filter box (2). Two connecting bends (5) are fixedly connected to the upper surface of the fine filter box (2). Two reagent spraying tanks (6) are fixedly connected to one end of the two connecting bends (5) that are close to each other. Multiple spraying heads (7) are fixedly connected to the outer surface of each connecting bend (5). A sewage tank (9) is fixedly connected to one side of the two support plates (1) that are close to each other. A disc filter (10) is fixedly installed on the front of the sewage tank (9), and the bottom of the sewage tank (9) is fixedly connected to... There is a sludge discharge pipe (13), and a sludge discharge valve (14) is fixedly connected to the outer surface of the sludge discharge pipe (13). A vortex mixer (16) is fixedly connected to the inner wall of the fine filter box (2). An ion exchange fine filter assembly (17) is fixedly connected to the inner wall of the chemical softening reaction box (25). A connecting pipe (19) is fixedly connected to the bottom surface of the fine filter box (2) and the bottom surface of the chemical softening reaction box (25). The bottom end of the connecting pipe (19) passes through the sewage discharge box (9). The connecting pipe (19) extends into the interior of the sewage tank (9). A solenoid valve is fixedly connected to the outer surface of the connecting pipe (19). Two swirl plates (20) are fixedly installed inside the sewage tank (9). A suspended solids removal layer (21) is fixedly connected to the inner wall of the sewage tank (9). A sedimentation plate (22) is fixedly connected to the inner wall of the sewage tank (9). A conical sedimentation trough (23) is opened on the upper surface of the sedimentation plate (22). The fine filter box (2) is located above the sewage tank (9).
2. The treatment device for reducing hardness and TDS in coal gasification circulating water according to claim 1, characterized in that: The upper surface of the fine filter box (2) is fixedly connected to two support recesses (8), and the inner walls of the two sets of support recesses (8) are fixedly connected to the outer surface of the drug spraying tank (6).
3. The treatment device for reducing hardness and TDS in coal gasification circulating water according to claim 1, characterized in that: The bottom surface of the sewage box (9) is fixedly connected to two support inclined blocks (11), and the two support inclined blocks (11) are fixedly connected to the side of the support plate (1) that is close to each other.
4. The treatment device for reducing hardness and TDS in coal gasification circulating water according to claim 1, characterized in that: Each of the support plates (1) has two mounting holes (12) on its upper surface, and each mounting hole (12) has a threaded inner ring.
5. The treatment device for reducing hardness and TDS in coal gasification circulating water according to claim 1, characterized in that: The bottom surface of the sewage box (9) is fixedly connected to a stabilizing plate (15), and the inner side wall of the stabilizing plate (15) is fixedly connected to the outer surface of the sludge discharge pipe (13).
6. The treatment device for reducing hardness and TDS in coal gasification circulating water according to claim 1, characterized in that: The inner bottom wall of the fine filter box (2) is fixedly connected to two guide blocks (18), and the top of each guide block (18) is fixedly connected to the bottom surface of the ion exchange fine filter assembly (17). The ion exchange fine filter assembly (17) includes an activated carbon layer (1701), a zeolite layer (1702), and a chelating resin layer (1703).