A multi-stage multi-medium filtering device for coal gasification ash water

Abstract

The utility model provides a kind of multi-stage multi-medium filtering device of coal gasification ash water, sealing tank body tank body is equipped with tank cover, discharge port, entry hole door, smokeless coal layer is installed inside, quartz sand layer;Water distribution system contains inlet pipe, inlet water tee valve, water distribution assembly, water distribution assembly is composed of main pipe section, radiation branch pipe and diffusion spray head, realize umbrella-shaped water distribution;Filtering system contains perforated partition, water collecting cavity, outlet pipe, outlet water tee valve, water collecting cavity is connected exhaust pipe and automatic exhaust valve;Backwash system contains compressed air branch pipe, anti-blocking baffle, outlet water tee valve second port is backwash inlet, inlet water tee valve second port is backwash drain outlet.The device can uniformly distribute water, efficiently filter, backwash conveniently, medium loading and unloading conveniently, ensure ash water treatment stable and efficient, improve filtering effect and device reliability.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology in coal gasification production, and more specifically, to a multi-stage, multi-media filtration device for coal gasification ash water. Background Technology

[0002] In the coal gasification production process, a large amount of ash water containing various impurities is generated. Direct discharge of this ash water will not only cause serious environmental pollution but also waste water resources. Therefore, the rational and effective treatment of coal gasification ash water is crucial, and filtration is one of the key steps in the ash water treatment process.

[0003] Currently, existing coal gasification ash water filtration devices have many shortcomings, particularly the design of the backwashing system, which is inadequate. Traditional backwashing methods often fail to thoroughly remove impurities trapped in the filter media, easily leading to clogging and affecting the efficiency and filtration effect of the device. Furthermore, the agitation and impact of the water flow during backwashing are insufficient, failing to fully utilize the backwashing function and resulting in unsatisfactory performance recovery after backwashing. Additionally, air can easily accumulate in areas such as the water collection chamber during operation. If this air is not promptly discharged, it can affect water flow and the stability of the filtration process, potentially even causing device malfunction. Utility Model Content

[0004] Based on the above-mentioned technical problems, this utility model proposes a multi-stage, multi-media filtration device for coal gasification ash water.

[0005] A multi-stage, multi-media filtration device for coal gasification ash water, characterized in that it comprises:

[0006] The sealed tank has an openable and closable tank cover at the top and a discharge port at the bottom. The tank is lined with anthracite coal layer and quartz sand layer from top to bottom.

[0007] Water distribution system, including:

[0008] The water inlet pipe is connected to a three-way valve at its outer end.

[0009] The water distribution assembly connects to the inner end of the water inlet pipe and forms an umbrella-shaped water distribution surface on the upper part of the tank.

[0010] Filtration system, comprising:

[0011] A perforated baffle is located at the bottom of the tank, below which a water collection chamber is formed;

[0012] The outlet pipe connects to the water collection chamber, and the outer end is connected to the outlet three-way valve;

[0013] The backwashing system includes:

[0014] Compressed air branch pipe connected to the water outlet pipe;

[0015] An anti-clogging baffle is installed above the inner port of the water outlet pipe;

[0016] The second port of the outlet three-way valve forms the backwash inlet, and the second port of the inlet three-way valve forms the backwash outlet.

[0017] Preferably, the water distribution assembly consists of radial branch pipes arranged in a cross shape, with diffusion nozzles provided at the ends of the radial branch pipes.

[0018] Preferably, the diameter of the anti-clogging baffle is larger than the diameter of the inner port of the water outlet pipe; the baffle is fixed to the bottom of the tank by at least three suspension rods.

[0019] Preferably, the water collection chamber is connected to an exhaust pipe, and an automatic exhaust valve is provided at the top of the exhaust pipe.

[0020] Preferably, the upper part of the tank is provided with an access door.

[0021] Beneficial effects:

[0022] 1. The multi-stage, multi-media filter layer (anthracite layer and quartz sand layer) can effectively filter different particulate impurities in ash water, further improving filtration efficiency.

[0023] 2. Convenient backwashing: Compressed air is introduced into the compressed air branch pipe of the backwashing system to agitate the water flow, which enhances the impact effect of backwashing and can more thoroughly remove impurities in the filter media, preventing filter media blockage. The anti-clogging baffle prevents the outlet port from being blocked by impurities during backwashing, ensuring the smooth progress of the backwashing process. The coordination of the backwashing inlet, backwashing outlet and related valves realizes convenient control of the backwashing process and improves the maintenance efficiency of the device.

[0024] 3. Stable operation guarantee: The exhaust pipe and automatic exhaust valve connected to the water collection chamber can promptly discharge accumulated air, preventing air from affecting the water flow and filtration process, thus ensuring the stability of the device operation;

[0025] 4. The overall structure is reasonably designed, and all components work together to effectively meet the needs of coal gasification ash water filtration, thus improving the reliability of the entire ash water treatment system. Attached Figure Description

[0026] Figure 1 A schematic diagram of the structure of this utility model is shown;

[0027] Figure 2 A schematic diagram of the structure of this utility model is shown;

[0028] In the attached diagram, 1. Sealed tank, 2. Anthracite seam, 3. Quartz sand layer, 4. Water inlet pipe, 5. Water inlet three-way valve, 6. Water distribution assembly, 7. Perforated baffle, 701. Water collection chamber, 8. Water outlet pipe, 9. Water outlet three-way valve, 901. Clean water outlet, 902. Backwash inlet, 501. Raw water inlet, 502. Backwash drain outlet, 10. Compressed air branch pipe, 11. Anti-clogging baffle, 1101. Suspension rod, 13. Exhaust pipe, 101. Tank cover, 102. Discharge port, 103. Manhole, 14. Vent pipe, 15. Pressure gauge connection pipe. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] like Figures 1-2 The multi-stage, multi-media filtration device for coal gasification ash water shown mainly consists of a sealed tank 1, a water distribution system, a filtration system, and a backwashing system.

[0031] The sealed tank 1 is the core load-bearing and reaction space of the entire device. It has an openable and closable tank cover 101 at the top for easy maintenance and other operations. A discharge port 102 at the bottom is used to discharge the anthracite layer 2 and quartz sand layer 3, among other filter media, when the filter media needs to be replaced. The tank contains anthracite layer 2 and quartz sand layer 3 arranged from top to bottom. Anthracite and quartz sand serve as filter media, utilizing their multi-stage, multi-media characteristics to progressively filter impurities in the coal gasification ash water. Anthracite primarily removes larger particles, while quartz sand further filters finer impurities, thus improving the filtration effect. An inlet door 103 at the top of the tank further facilitates loading and maintenance operations, while the discharge port 102 at the bottom ensures smooth discharge.

[0032] The water distribution system includes an inlet pipe 4 and a water distribution assembly 6. The outer end of the inlet pipe 4 is connected to an inlet three-way valve 5. The inlet three-way valve 5 is used to control the processes such as water intake and backwash drainage. During normal filtration, the raw water inlet 501 of the inlet three-way valve 5 is opened, allowing the coal gasification ash water to enter the tank through the inlet pipe 4. During backwashing, the second port of the inlet three-way valve 5 forms a backwash drain 502, which is connected to a pumping device to discharge the wastewater after backwashing.

[0033] The water distribution assembly 6 is connected to the inner end of the water inlet pipe 4 and forms an umbrella-shaped water distribution surface on the upper part of the tank. The water distribution assembly 6 includes radial branch pipes distributed in a cross shape, and diffuser nozzles are installed on the radial branch pipes. This structural design allows the ash water entering the tank to be evenly distributed on the upper part of the tank through the water distribution assembly 6, forming an umbrella-shaped water distribution surface. This ensures that the ash water can evenly penetrate into the anthracite coal layer 2 and the quartz sand layer 3, avoiding the problem of local overuse of the filter media caused by uneven water distribution, and improving the filtration effect and service life of the filter media.

[0034] The filtration system includes a perforated baffle 7 and an outlet pipe 8. The perforated baffle 7 is located in the lower part of the tank, forming a water collection chamber 701 below it. The perforated baffle 7 supports the filter media in the upper part and allows filtered water to flow into the water collection chamber 701 through the perforations. The water collection chamber 701 is connected to an exhaust pipe 13. An automatic exhaust valve is installed at the top of the exhaust pipe 13 to promptly remove air accumulated in the water collection chamber 701, ensuring smooth water flow and the stability of the filtration process. If too much air accumulates in the water collection chamber 701, it will affect the water flow resistance and filtration efficiency. The automatic exhaust valve can effectively solve this problem. When the air pressure in the water collection chamber 701 reaches a certain value, the automatic exhaust valve opens to release the air.

[0035] The inner end of the outlet pipe 8 is connected to the water collection chamber 701, and the outer end of the outlet pipe 8 is connected to the outlet three-way valve 9. During normal filtration, the clean water outlet 901 of the outlet three-way valve 9 is opened, so that the filtered clean water can be discharged from the water collection chamber 701 through the outlet pipe 8. The second port of the outlet three-way valve 9 constitutes the backwash inlet 902. During backwashing, the flushing water can enter the outlet pipe 8 from this port.

[0036] The backwashing system includes a compressed air branch pipe 10 connected to the outlet pipe 8. During the backwashing process, compressed air is introduced into the outlet pipe 8 through the compressed air branch pipe 10. The compressed air agitates the water flow, making the backwashing impact stronger and more effective in removing impurities trapped in the filter media. An anti-clogging baffle 11 is located above the inner port of the outlet pipe 8. Its diameter is larger than the diameter of the inner port of the outlet pipe 8. The baffle is fixed to the bottom of the tank by at least three suspension rods 1101. The anti-clogging baffle 11 can prevent impurities from clogging the inner port of the outlet pipe 8 during backwashing, ensuring the smooth progress of the backwashing process.

[0037] Backwashing process: The flushing water enters the outlet pipe 8 from the backwashing inlet 902. At this time, the inlet pipe 4 stops feeding water. The flushing water rises from the perforated baffle 7 below the filter layer and backwashes the filter layer (anthracite layer 2 and quartz sand layer 3) to wash away the trapped impurities. The wastewater after backwashing flows out from the outer outlet at the inner end of the inlet pipe 4 and out through the inlet pipe 4. It is discharged through the backwash drain port of the inlet three-way valve 5. The backwash drain port is connected to a pumping device to pump out the backwash wastewater. In addition, the outlet pipe 8 is also connected to a vent pipe 14. The vent pipe 14 can empty the dirt in the filter body. It is normally closed when the filtration is in normal operation, which makes it convenient to discharge dirt when a deep cleaning of the inside of the device is required.

[0038] Pressure detection: Pressure gauge connection pipe 15 is installed at the outlet three-way valve 9 and the inlet three-way valve 5. Pressure gauge connection pipe 15 is connected to a pressure gauge. After the filter has been running for a period of time, the pressure difference between the inlet and outlet of the quartz sand layer 3 increases due to the accumulation of impurities (or reaches the set running time), and the backwashing program needs to be started. This program is controlled by an automatic control system, including the venting of the vent pipe 13, the opening and closing of the outlet three-way valve 9, the opening and closing of the inlet three-way valve 5, and the opening and closing of the backwash.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage, multi-media filtration device for coal gasification ash water, characterized in that, include: The sealed tank (1) has an openable and closable tank cover (101) at the top and a discharge port (102) at the bottom. The tank is equipped with an anthracite coal layer (2) and a quartz sand layer (3) from top to bottom. Water distribution system, including: Water inlet pipe (4), with an inlet three-way valve (5) connected to its outer end; The water distribution assembly (6) is connected to the inner end of the water inlet pipe (4) and forms an umbrella-shaped water distribution surface on the upper part of the tank body (1); Filtration system, comprising: A perforated baffle (7) is provided at the bottom of the tank, and a water collection cavity (701) is formed below it. The outlet pipe (8) is connected to the water collection chamber (701), and the outer end is connected to the outlet three-way valve (9); The backwashing system includes: Compressed air branch pipe (10) connected to water outlet pipe (8); An anti-blocking baffle (11) is installed above the inner port of the water outlet pipe (8); The second port of the outlet three-way valve (9) constitutes the backwash inlet (902), and the second port of the inlet three-way valve (5) constitutes the backwash outlet (502).

2. The multi-stage, multi-media filtration device for coal gasification ash water according to claim 1, characterized in that, The water distribution assembly (6) consists of radial branches arranged in a cross shape, with diffusion nozzles at the ends of the radial branches.

3. The multi-stage, multi-media filtration device for coal gasification ash water according to claim 1, characterized in that, The diameter of the anti-blocking baffle (11) is larger than the diameter of the inner port of the water outlet pipe (8); the baffle (11) is fixed to the bottom of the tank by at least three suspension rods (1101).

4. The multi-stage, multi-media filtration device for coal gasification ash water according to claim 1, characterized in that, The water collection chamber (701) is connected to the exhaust pipe (13), and an automatic exhaust valve is provided at the top of the exhaust pipe (13).

5. The multi-stage, multi-media filtration device for coal gasification ash water according to claim 1, characterized in that, The upper part of the tank (1) is provided with an inlet door (103).

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