Fly ash water treatment system

Abstract

The utility model discloses a fly ash water treatment system which comprises a fly ash storage tank, and the fly ash storage tank conveys fly ash in the fly ash storage tank to a washing reactor through a first fan; an aeration pipeline is arranged in the washing reactor; the bottom of the washing reactor is connected with an inlet of the sludge thickening tank through a pipeline, a sediment outlet of the sludge thickening tank is connected with an inlet of the plate-and-frame filter press through a pipeline, and supernate outlets of the sludge thickening tank and the plate-and-frame filter press are connected with an inlet of the sewage regulating tank through pipelines; fly ash tail gas containing a large amount of carbon dioxide is introduced into the washing reactor, and the aeration pipeline in the washing reactor is used for efficient aeration, so that calcium and magnesium ions in grey water can be directly solidified and are subjected to solid-liquid separation together with fly ash, the hardness of the grey water can be effectively reduced, and the service life of the grey water is prolonged. Therefore, the scaling and sewage blocking tendency of the gasified grey water system is greatly slowed down; meanwhile, fly ash tail gas can be utilized to the maximum extent, secondary filtration and solid-liquid separation are not needed, and energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste incineration fly ash treatment, in particular to a fly ash water treatment system. Background Art

[0002] At present, the treatment of fly ash is mostly done by washing process, and then sodium carbonate is used to remove calcium ions in the washing process. However, the price of sodium carbonate is relatively high. If the lower-priced sodium sulfate is used to remove calcium ions, it will cause the subsequent ultrafiltration membrane to be blocked. In addition, the treatment of fly ash washing wastewater has not yet achieved the maximum resource recycling. Therefore, it is necessary to start from all directions to reduce the cost of fly ash treatment on the basis of achieving the maximum resource recycling.

[0003] Based on the above situation, the utility model proposes a fly ash water treatment system, which can effectively solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a fly ash water treatment system. The fly ash water treatment system provided by the utility model has a simple structure. By introducing fly ash tail gas containing a large amount of carbon dioxide into a water washing reactor and using the aeration pipeline in the water washing reactor for efficient aeration, it is convenient to directly solidify the calcium and magnesium ions in the ash water and perform solid-liquid separation together with the fly ash, which can effectively reduce the hardness of the ash water, thereby greatly slowing down the scaling and fouling tendency of the gasification ash water system; at the same time, the fly ash tail gas can be maximized, without the need for secondary filtration and solid-liquid separation, which is energy-saving and environmentally friendly.

[0005] The utility model is realized by the following technical solutions:

[0006] A fly ash water treatment system comprises a fly ash storage tank, wherein the fly ash storage tank transports the fly ash in the fly ash storage tank to a water washing reactor through a first fan; an aeration pipeline is arranged inside the water washing reactor; the bottom of the water washing reactor is connected to the inlet of a sludge thickening tank through a pipeline, the sedimentation outlet of the sludge thickening tank is connected to the inlet of a plate and frame filter press through a pipeline, and the supernatant outlets of the sludge thickening tank and the plate and frame filter press are both connected to the inlet of a sewage regulating tank through pipelines; the gas outlet of the water washing reactor is connected to the bottom of an absorption tower through a pipeline; the top of the absorption tower is connected to a second fan through a pipeline, and the second fan transports the tail gas generated by the absorption tower into the atmosphere.

[0007] According to the above technical scheme, as a further preferred technical scheme of the above technical scheme, the lower part of the water washing reactor is connected to the liquid inlet of the gas-liquid mixer through a pipeline, and a first circulation pump is connected between the water washing reactor and the gas-liquid mixer; the top of the water washing reactor is connected to the air inlet of the gas-liquid mixer through a pipeline, and the outlet of the gas-liquid mixer is connected to the water washing reactor through a pipeline.

[0008] According to the above technical solution, as a further preferred technical solution of the above technical solution, a stirring shaft is provided inside the water washing reactor, stirring blades are provided outside the stirring shaft, and the top of the stirring shaft is fixedly connected to the output end of the stirring motor.

[0009] According to the above technical solution, as a further preferred technical solution of the above technical solution, the bottom of the absorption tower is connected to the upper part of the absorption tower through a circulation pipe, and a second circulation pump is fixedly connected to the circulation pipe.

[0010] According to the above technical solution, as a further preferred technical solution of the above technical solution, a water supply pipe is connected to one side of the water washing reactor.

[0011] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0012] The utility model provides a fly ash water treatment system with a simple structure. The fly ash tail gas containing a large amount of carbon dioxide is introduced into a water washing reactor, and an aeration pipeline in the water washing reactor is used for efficient aeration, so that the calcium and magnesium ions in the ash water can be directly solidified and separated from the fly ash together with the solid-liquid, which can effectively reduce the hardness of the ash water, thereby greatly alleviating the scaling and fouling tendency of the gasification ash water system; at the same time, the fly ash tail gas can be utilized to the maximum extent without the need for secondary filtration and solid-liquid separation, thereby saving energy and being environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as a limitation on this patent.

[0015] A fly ash water treatment system comprises a fly ash storage tank 1, wherein the fly ash storage tank 1 transports the fly ash in the fly ash storage tank 1 to a water washing reactor 3 through a first fan 2; an aeration pipeline 4 is arranged inside the water washing reactor 3; the bottom of the water washing reactor 3 is connected to the inlet of a sludge thickening tank 5 through a pipeline, the sedimentation outlet of the sludge thickening tank 5 is connected to the inlet of a plate and frame filter press 6 through a pipeline, and the supernatant outlets of the sludge thickening tank 5 and the plate and frame filter press 6 are both connected to the inlet of a sewage regulating tank 7 through pipelines; the gas outlet of the water washing reactor 3 is connected to the bottom of an absorption tower 8 through a pipeline; the top of the absorption tower 8 is connected to a second fan 9 through a pipeline, and the second fan 9 transports the tail gas generated by the absorption tower 8 to the atmosphere.

[0016] The utility model introduces fly ash tail gas containing a large amount of carbon dioxide into the water washing reactor 3, and uses the aeration pipeline 4 in the water washing reactor 3 for efficient aeration, so as to directly solidify the calcium and magnesium ions in the ash water, and perform solid-liquid separation together with the fly ash, which can effectively reduce the hardness of the ash water, thereby greatly reducing the scaling and fouling tendency of the gasification ash water system; at the same time, the fly ash tail gas can be maximized, without the need for secondary filtration and solid-liquid separation, which is energy-saving and environmentally friendly.

[0017] Furthermore, in another embodiment, the lower part of the water washing reactor 3 is connected to the liquid inlet of the gas-liquid mixer 10 through a pipeline, and a first circulation pump is connected between the water washing reactor 3 and the gas-liquid mixer 10; the top of the water washing reactor 3 is connected to the gas inlet of the gas-liquid mixer 10 through a pipeline, and the outlet of the gas-liquid mixer 10 is connected to the water washing reactor 3 through a pipeline. Through the gas-liquid mixer 10, the carbon dioxide that does not participate in the reaction is recycled and pressurized for secondary use, so that it reacts fully and completely.

[0018] Further, in another embodiment, a stirring shaft 11 is provided inside the water washing reactor 3, a stirring blade 12 is provided outside the stirring shaft 11, and the top of the stirring shaft 11 is fixedly connected to the output end of the stirring motor 13. Through the mutual cooperation of the stirring shaft 11, the stirring blade 12 and the stirring motor 13, the grey water can be fully stirred to achieve the purpose of full reaction.

[0019] Furthermore, in another embodiment, the bottom of the absorption tower 8 is communicated with the upper part of the absorption tower 8 through a circulation pipe 14 , and a second circulation pump 15 is fixedly connected to the circulation pipe 14 .

[0020] Furthermore, in another embodiment, a water supply pipe 16 is connected to one side of the water washing reactor 3 .

[0021] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use a fly ash water treatment system of the present invention, and can produce the positive effects recorded in the present invention.

[0022] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0023] Unless otherwise specified and limited, in the present invention, the terms "disposed", "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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A fly ash water treatment system, characterized in that: The invention comprises a fly ash storage tank (1), wherein the fly ash storage tank (1) transports the fly ash in the fly ash storage tank (1) to a water washing reactor (3) through a first fan (2); an aeration pipeline (4) is arranged inside the water washing reactor (3); the bottom of the water washing reactor (3) is connected to the inlet of a sludge thickening tank (5) through a pipeline, the sedimentation outlet of the sludge thickening tank (5) is connected to the inlet of a plate-frame filter press (6) through a pipeline, and the supernatant outlets of the sludge thickening tank (5) and the plate-frame filter press (6) are both connected to the inlet of a sewage regulating tank (7) through pipelines; the gas outlet of the water washing reactor (3) is connected to the bottom of an absorption tower (8) through a pipeline; the top of the absorption tower (8) is connected to a second fan (9) through a pipeline, and the second fan (9) transports the tail gas generated by the absorption tower (8) into the atmosphere.

2. A fly ash water treatment system according to claim 1, characterized in that: The lower part of the water-washing reactor (3) is connected to the liquid inlet of the gas-liquid mixer (10) through a pipeline, and a first circulation pump (11) is connected between the water-washing reactor (3) and the gas-liquid mixer (10); the top of the water-washing reactor (3) is connected to the gas inlet of the gas-liquid mixer (10) through a pipeline, and the outlet of the gas-liquid mixer (10) is connected to the water-washing reactor (3) through a pipeline.

3. A fly ash water treatment system according to claim 1, characterized in that: The water washing reactor (3) is provided with a stirring shaft (12) inside, a stirring blade (13) is provided outside the stirring shaft (12), and the top of the stirring shaft (12) is fixedly connected to the output end of the stirring motor (14).

4. A fly ash water treatment system according to claim 1, characterized in that: The bottom of the absorption tower (8) is connected to the upper part of the absorption tower (8) through a circulation pipe (15), and a second circulation pump (16) is fixedly connected to the circulation pipe (15).

5. A fly ash water treatment system according to claim 1, characterized in that: One side of the water washing reactor (3) is connected to a water supply pipe (17).

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