Slag liquid fine filtering device

Abstract

The utility model provides a fine filtering device for slag liquid. The fine filtering device comprises a bag type filter, a ceramic membrane filtering system and a plate-and-frame filter pressing system, the bag filter is used for filtering slag liquid; the ceramic membrane filtration system is provided with a liquid inlet, a filtrate outlet and a slurry outlet; a liquid outlet of the bag filter and a liquid outlet of the plate-and-frame filter pressing system are respectively communicated with a liquid inlet of the ceramic membrane filtering system through pipelines; a slurry outlet of the bag filter and a slurry outlet of the ceramic membrane filtration system are respectively communicated to a slurry inlet of the plate-and-frame filter pressing system through pipelines; and a filtrate outlet of the ceramic membrane filtration system is communicated to a product solution tank through a pipeline. According to the technical scheme provided by the utility model, the problem that a high-precision filtering device is easy to damage due to the fact that the slag liquid contains larger insoluble particles and is directly used for filtering is solved.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and more specifically, to a slag-liquid fine filtration device. Background Technology

[0002] In chemical processes such as solid waste treatment, the crushing, dissolving, or water quenching of solid waste often yields a slag-liquid mixture with a high solid content. This mixture is often complex in composition and requires multiple processing steps. Solid-liquid separation of the slag-liquid mixture to obtain high-quality filtrate is beneficial for subsequent processing. Filtrate obtained solely by plate and frame filter presses generally still contains a certain amount of suspended solids, increasing the difficulty of subsequent filtrate treatment. Furthermore, excessively high solid content in the slag-liquid mixture can easily damage and clog ceramic membrane filtration systems. Bag filters offer high throughput, small size, large dirt-holding capacity, and wide applicability, enabling micron-level filtration of suspended solids. Ceramic membranes can achieve nano-level filtration of suspended solids, resulting in high-quality effluent. Therefore, designing a well-structured slag-liquid fine filtration device is crucial. Utility Model Content

[0003] To address the technical problem that directly filtering sludge containing large insoluble particles can easily damage the filtration device, this utility model provides a sludge fine filtration device for filtering sludge-liquid mixtures under conditions where high filtrate quality is required.

[0004] The technical means adopted in this utility model are as follows:

[0005] A sludge-liquid fine filtration device includes a bag filter, a ceramic membrane filtration system, and a plate and frame filter press system;

[0006] The bag filter is used to filter sludge and liquid.

[0007] The ceramic membrane filtration system is equipped with a liquid inlet, a filtrate outlet, and a slurry outlet.

[0008] The liquid outlet of the bag filter and the liquid outlet of the plate and frame filter press system are respectively connected to the liquid inlet of the ceramic membrane filter system through pipelines;

[0009] The slurry outlet of the bag filter and the slurry outlet of the ceramic membrane filtration system are respectively connected to the slurry inlet of the plate and frame filter press system through pipelines;

[0010] The filtrate outlet of the ceramic membrane filtration system is connected to the product solution tank via a pipeline.

[0011] Furthermore, the inlet of the bag filter is connected to a sludge pool containing sludge to be treated via a pipeline, and a mud pump I for conveying the sludge is provided between the sludge pool and the bag filter.

[0012] Furthermore, the ceramic membrane filtration system is used to filter the clear liquid discharged from the bag filter and the filtrate discharged from the plate and frame filter press system, and the filtrate obtained after filtration is the product solution after sludge treatment; the plate and frame filter press system is used to filter the slurry discharged from the bag filter and the ceramic membrane filtration system.

[0013] Furthermore, it also includes a slurry tank for collecting the slurry discharged from the bag filter and the ceramic membrane filtration system; the slurry outlet of the ceramic membrane filtration system and the slurry outlet of the bag filter are respectively connected to the inlet of the slurry tank through pipelines, and the outlet of the slurry tank is connected to the slurry inlet of the plate and frame filter press system through a pipeline; a slurry pump II for conveying slurry is provided between the slurry tank and the plate and frame filter press system.

[0014] Furthermore, the membrane inside the ceramic membrane filtration system is a flat sheet membrane made of silicon carbide.

[0015] Furthermore, a backwash pump I is provided between the product solution tank and the ceramic membrane filtration system. The backwash pump I is used to periodically deliver the product solution to the ceramic membrane filtration system for backwashing.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The sludge-liquid fine filtration device provided by this utility model uses a combination of bag filter, plate and frame filter press system and membrane filtration system to filter sludge-liquid mixture containing large particles of insoluble matter and unstable water quality. The product filtrate has good quality and will not damage the filter press system.

[0018] Based on the above reasons, this utility model can be widely promoted in the field of chemical solid waste treatment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the sludge-liquid fine filtration device described in this utility model. Detailed Implementation

[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0025] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0026] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0027] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0028] Example 1

[0029] like Figure 1 As shown, this utility model provides a sludge-liquid fine filtration device, including a bag filter, a ceramic membrane filtration system and a plate and frame filter press system;

[0030] The bag filter is used to filter sludge and liquid.

[0031] The ceramic membrane filtration system is equipped with a liquid inlet, a filtrate outlet, and a slurry outlet.

[0032] The liquid outlet of the bag filter and the liquid outlet of the plate and frame filter press system are respectively connected to the liquid inlet of the ceramic membrane filter system through pipelines;

[0033] The slurry outlet of the bag filter and the slurry outlet of the ceramic membrane filtration system are respectively connected to the slurry inlet of the plate and frame filter press system through pipelines;

[0034] The filtrate outlet of the ceramic membrane filtration system is connected to the product solution tank via a pipeline.

[0035] Furthermore, the bag filter is used to filter large insoluble particles in the sludge liquid; the inlet of the bag filter is connected to a sludge liquid tank containing the sludge liquid to be treated via a pipeline, and a mud pump I for conveying the sludge liquid is provided between the sludge liquid tank and the bag filter.

[0036] Furthermore, the ceramic membrane filtration system is used to filter the clear liquid discharged from the bag filter and the filtrate discharged from the plate and frame filter press system, and the filtrate obtained after filtration is the product solution after sludge treatment; the plate and frame filter press system is used to filter the slurry discharged from the bag filter and the ceramic membrane filtration system.

[0037] Furthermore, it also includes a slurry tank for collecting the slurry discharged from the bag filter and the ceramic membrane filtration system; the slurry outlet of the ceramic membrane filtration system and the slurry outlet of the bag filter are respectively connected to the inlet of the slurry tank through pipelines, and the outlet of the slurry tank is connected to the slurry inlet of the plate and frame filter press system through a pipeline; a slurry pump II for conveying slurry is provided between the slurry tank and the plate and frame filter press system.

[0038] Furthermore, the membrane inside the ceramic membrane filtration system is a flat sheet membrane made of silicon carbide.

[0039] Furthermore, a backwash pump I is provided between the product solution tank and the ceramic membrane filtration system. The backwash pump I is used to periodically deliver the product solution to the ceramic membrane filtration system for backwashing.

[0040] Furthermore, it also includes a backwash pump II and a cleaning tank containing acidic cleaning solution. The backwash pump II is located between the outlet of the cleaning tank and the inlet of the ceramic membrane filtration system. It is used to periodically deliver the acidic cleaning solution from the cleaning tank to the ceramic membrane filtration system for rinsing. After the ceramic membrane filtration system is rinsed with the acidic cleaning solution, the product solution is delivered by the backwash pump I for backwashing. The acidic cleaning solution is recycled back to the cleaning tank after rinsing. The product solution after backwashing enters the mud tank.

[0041] Furthermore, the pipes used in the sludge fine filtration device, the mud pump I, the mud pump II, the backwash pump I, and the backwash pump II are all wear-resistant and resistant to material corrosion.

[0042] Furthermore, the bag filter used has a housing material of titanium alloy, a filter element material of titanium alloy, a filter pressure of 1.6 MPa, a filtration accuracy of 100 μm, and a filter element length of 1000 mm.

[0043] The ceramic membrane filtration system has a membrane spacing of 10mm, a membrane pore size of 100nm, and a sludge-liquid treatment capacity of 120m³. 3 / h;

[0044] The plate and frame filter press system uses an XAZGFQ700 / 200-UK plate and frame filter press with a feed pressure of 0.6MPa-0.8MPa, a pressing pressure of 12MPa, a back pressure of 30MPa, and a filtration pressure of 0.8MPa.

[0045] The sludge-liquid fine filtration device provided by this utility model can filter sludge-liquid mixtures containing large insoluble particles and with unstable incoming water quality, producing high-quality filtrate that will not damage the various pressure filtration systems. Specific working process:

[0046] The sludge to be treated is collected and mixed in a sludge tank, and then pumped into a bag filter for filtration using mud pump I. The clear liquid discharged from the bag filter enters a membrane filtration system for filtration. The discharged mud is mixed with the mud produced by the ceramic membrane filtration system and then sent to a plate and frame filter press system for filtration. The filter cake produced by the plate and frame filter press system is sent for external disposal. The filtrate produced by the plate and frame filter press system is then sent to the ceramic membrane filtration system for filtration. The filtrate discharged from the ceramic membrane filtration system is the product solution. The product solution is collected in a product solution tank and then sent to the next process.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sludge-liquid fine filtration device, characterized in that, The system includes a bag filter, a ceramic membrane filtration system, and a plate and frame filter press system. The bag filter is used to filter sludge and liquid. The ceramic membrane filtration system is provided with a liquid inlet, a filtrate outlet, and a slurry outlet. The liquid outlet of the bag filter and the liquid outlet of the plate and frame filter press system are respectively connected to the liquid inlet of the ceramic membrane filtration system through pipelines. The slurry outlet of the bag filter and the slurry outlet of the ceramic membrane filtration system are respectively connected to the slurry inlet of the plate and frame filter press system through pipelines. The filtrate outlet of the ceramic membrane filtration system is connected to a product solution tank through a pipeline.

2. The sludge-liquid fine filtration device according to claim 1, characterized in that, The inlet of the bag filter is connected to a sludge tank containing sludge to be treated via a pipeline, and a mud pump I for conveying the sludge is installed between the sludge tank and the bag filter.

3. The sludge-liquid fine filtration device according to claim 1, characterized in that, The ceramic membrane filtration system is used to filter the clear liquid discharged from the bag filter and the filtrate discharged from the plate and frame filter press system. The filtrate obtained after filtration is the product solution after sludge treatment. The plate and frame filter press system is used to filter the slurry discharged from the bag filter and the ceramic membrane filter system.

4. The sludge-liquid fine filtration device according to claim 1, characterized in that, It also includes a slurry tank for collecting slurry discharged from the bag filter and the ceramic membrane filtration system; the slurry outlet of the ceramic membrane filtration system and the slurry outlet of the bag filter are respectively connected to the inlet of the slurry tank through pipelines, and the outlet of the slurry tank is connected to the slurry inlet of the plate and frame filter press system through a pipeline; a slurry pump II for conveying slurry is provided between the slurry tank and the plate and frame filter press system.

5. The sludge-liquid fine filtration device according to claim 1, characterized in that, The membrane inside the ceramic membrane filtration system is a flat sheet membrane made of silicon carbide.

6. The sludge-liquid fine filtration device according to claim 1, characterized in that, A backwash pump I is installed between the product solution tank and the ceramic membrane filtration system. The backwash pump I is used to periodically deliver product solution to the ceramic membrane filtration system for backwashing.

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