阅读说明：本技术 一种基于飞灰水洗工艺泥水分离的真空抽滤装置 (Vacuum filtration device based on fly ash washing process mud-water separation ) 是由 王前 邓四化 房豪杰 王希伟 吴海军 李建秋 刘伟 于 2021-08-19 设计创作，主要内容包括：本发明涉及一种基于飞灰水洗工艺泥水分离的真空抽滤装置,包括过滤罐体(1)和过滤组件,所述的过滤组件设置在过滤罐体(1)的内部空腔中,并将内部空腔分隔为滤前腔和滤后腔,所述的过滤罐体(1)上还设有连通滤前腔的旋流进气组件,该旋流进气组件与外部供气管道连接并在滤前腔内形成旋流。本发明工作时,压缩空气通过旋流进气口进行吹气,使泥浆形成旋流,搅拌充分后,打开真空泵进行抽滤,滤液通过过滤液出口排除,飞灰泥饼留在支撑板上方。与现有技术相比,本发明可在同一装置中实现水洗搅拌过滤,节省空间和成本。(The invention relates to a vacuum filtration device based on fly ash washing process mud-water separation, which comprises a filtering tank body (1) and a filtering component, wherein the filtering component is arranged in an internal cavity of the filtering tank body (1) and divides the internal cavity into a pre-filtering cavity and a post-filtering cavity, the filtering tank body (1) is also provided with a rotational flow air inlet component communicated with the pre-filtering cavity, and the rotational flow air inlet component is connected with an external air supply pipeline and forms rotational flow in the pre-filtering cavity. When the device works, compressed air blows through the rotational flow air inlet to enable slurry to form rotational flow, after the slurry is fully stirred, the vacuum pump is started to carry out suction filtration, filtrate is discharged through the filtrate outlet, and fly ash mud cakes are left above the supporting plate. Compared with the prior art, the invention can realize water washing, stirring and filtering in the same device, thereby saving space and cost.)

1. The utility model provides a vacuum filtration device based on flying dust washing technology mud-water separation, is including filtering a jar body (1) and filtering component, filtering component set up in the inside cavity of filtering a jar body (1) to separate the inside cavity for straining the ante-chamber and strain the back chamber, its characterized in that, filtering jar body (1) on still be equipped with the whirl air intake assembly that the ante-chamber was strained in the intercommunication, this whirl air intake assembly is connected with outside gas supply line and forms the whirl in straining the ante-chamber.

2. The vacuum filtration device based on fly ash washing process mud-water separation of claim 1, characterized in that, the cyclone air intake component comprises a plurality of cyclone air inlets (3) distributed on the filtering tank body (1), all the cyclone air inlets (3) obliquely extend into the pre-filtering cavity along the circumferential direction, so that the compressed gas fed through the cyclone air inlets (3) forms a cyclone in the pre-filtering cavity.

3. The vacuum filtration device for separating sludge and water based on the fly ash washing process as claimed in claim 2, wherein all the cyclone air inlets (3) are obliquely inserted into the pre-filter chamber at the same angle.

4. The vacuum filtration device for separating sludge and water based on the fly ash washing process as claimed in claim 2, wherein the number of the cyclone air inlets (3) is 4.

5. The vacuum filtration device for separating sludge and water based on the fly ash washing process of claim 1, wherein the filtering assembly comprises a supporting plate (8) transversely arranged on the inner cavity of the filtering tank body (1) and a capillary filtering pipe (7) arranged on the supporting plate (8).

6. The vacuum filtration device for separating sludge and water based on the fly ash washing process as claimed in claim 5, wherein the capillary filter tube (7) is vertically arranged on the support plate (8), and the bottom of the capillary filter tube (7) is communicated with the post-filter cavity.

7. The vacuum filtration device for separating sludge and water based on the fly ash washing process according to claim 1, wherein the filtration tank body (1) is further provided with a hole (4) for vacuum pumping, which is communicated with the post-filtration cavity.

8. The vacuum filtration device for separating sludge and water based on the fly ash washing process according to claim 1, wherein the filtration tank body (1) is further provided with a sludge and water discharge hole (5) which is communicated with the pre-filtration cavity and is just above the filtration assembly.

9. The vacuum filtration device for separating sludge and water based on the fly ash washing process according to claim 1, wherein the upper end of the filtration tank body (1) is open.

10. The vacuum filtration device for separating sludge and water based on the fly ash washing process according to claim 1, wherein the bottom of the filtration tank body (1) is further provided with a filtrate outlet (6);

the filtering tank body (1) is also provided with a lifting lug (2).

Technical Field

The invention belongs to the technical field of hazardous waste fly ash treatment, and relates to a vacuum filtration device based on fly ash washing process mud-water separation.

Background

In the process of burning hazardous waste by burning disposal, a certain amount of slag and fly ash is generated, and in the 'national hazardous waste record' of 2016 edition, the waste code of the slag and the fly ash is 772-003-18 (except bottom slag generated by burning disposal of medical waste), and the hazardous waste needs to be landfilled. The entrance standard of hazardous waste into a flexible landfill is improved by the hazardous waste landfill pollution control standard in 2019, and the method is formally implemented in 6 and 1 month in 2020. The standard proposes that the content of soluble salt in the fly ash needs to be controlled to be below 10 percent when the fly ash enters a flexible landfill, the fly ash can reach the landfill standard through a fly ash washing process, and a mud-water separation process in the process is a very important step.

The current mainstream mud-water separation modes comprise a horizontal screw centrifuge, a plate-and-frame filter press and a traditional vacuum filtration device. When treating fly ash of different particle diameters, the horizontal screw centrifuge needs to carry out corresponding parameter adjustment, and the nature fluctuation of the useless fly ash of danger is great, needs often to adjust, complex operation, and horizontal screw centrifuge belongs to precision instruments in addition, and can take place surge phenomenon, and the fault rate is high, and horizontal screw centrifuge cost is expensive, and the maintenance cost is high. The plate and frame filter press has the advantages that the energy consumption is large when mud-water separation is carried out, solid phases are easy to adhere to the filter cloth and are not easy to drop, manual shoveling is needed, the labor cost is increased, continuous operation cannot be carried out, the occupied area is large, and the operation environment is poor. Traditional vacuum filtration device work efficiency is low, and the process time is long, and when the handling capacity is great, thereby can take place the lower part solid phase and contain liquid and hang down and form compact mud cake, lead to the unable circumstances that passes through of upper portion liquid.

In conclusion, the existing mud-water separation device has the problems of complex operation, high energy consumption, high failure rate, low working efficiency, high operation cost and the like.

Disclosure of Invention

The invention aims to provide a novel vacuum filtration device for separating sludge and water based on a fly ash washing process, and aims to solve the technical problems of complex operation, higher cost, lower working efficiency and the like of the conventional sludge and water separation device.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a vacuum filtration device based on flying dust washing technology mud-water separation, is including filtering a jar body and filter assembly, filter assembly set up in filtering the inside cavity of jar body to separate internal cavity for straining the ante-chamber and straining the back chamber, filtering jar body on still be equipped with the intercommunication and strain the whirl subassembly of admitting air of ante-chamber, this whirl subassembly of admitting air is connected with outside air supply line and forms the whirl in straining the ante-chamber.

Furthermore, the cyclone air inlet assembly comprises a plurality of cyclone air inlets distributed on the filtering tank body, and all the cyclone air inlets obliquely extend into the pre-filtering cavity along the circumferential direction, so that compressed air fed through the cyclone air inlets forms cyclone in the pre-filtering cavity.

Furthermore, all the swirl air inlets are obliquely inserted into the pre-filter cavity at the same angle.

Furthermore, 4 swirl air inlets are arranged.

Furthermore, the filter assembly comprises a support plate transversely arranged on the cavity inside the filter tank body and a capillary filter pipe arranged on the support plate.

Furthermore, the capillary filter pipe is vertically arranged on the support plate, and the bottom of the capillary filter pipe is communicated with the post-filter cavity.

Furthermore, a hole for vacuumizing is arranged on the filtering tank body and communicated with the post-filtering cavity.

Furthermore, the filtering tank body is also provided with a hole for discharging muddy water, which is communicated with the pre-filtering cavity and is just positioned above the filtering component.

Furthermore, the upper end of the filtering tank body is open.

Furthermore, the bottom of the filtering tank body is also provided with a filtrate outlet.

Furthermore, a lifting lug is also arranged on the filtering tank body.

The invention provides an improved device for using a filter stick based on a traditional vacuum filtration device. The fly ash and water are mixed in a certain proportion in the premixing tank and then are pumped into the filtering tank body, and compressed air blows through the rotational flow air inlet to enable slurry to form rotational flow which is equivalent to the stirring effect. Stopping air intake after stirring for a certain time, starting a vacuum pump to perform suction filtration, discharging filtrate through a filtrate outlet at the lower part, and leaving fly ash mud cakes above the supporting plate, thus completing primary water washing. And adding water in a certain proportion into the filtering tank body again, opening a compression air valve to enable the mud cakes to be dissolved again to form slurry, stirring for a certain time again, and repeating the previous step if water washing is needed again according to the process requirement, wherein if the process requirement is met, the slurry passes through the mud discharging water hole and is pumped to a centrifugal machine or a plate and frame filter press at the rear end.

The device does not use the process of laying filter cloth at the bottom in the traditional equipment, but uses a novel vacuum filtration stick device, and the device work efficiency is high, and the energy consumption is few, has still solved the easy problem of blockking up of bottom. The device has the stirring function, can use compressed air to carry out the four corners and directly blow (compressed air enters into four gas outlets that can rotation angle from top to bottom promptly, can blow in the direction according to actual conditions adjustment, normally for becoming 30-45 degrees contained angles with last plane and blowing in compressed air), forms the whirl, can realize that the washing stirring filters and accomplish in same device, has saved the space, has practiced thrift the cost.

Compared with the prior art, the invention has the following advantages:

(1) compared with the existing centrifugal and plate-frame filter pressing process, the process reduces the occupied area and equipment cost, and can meet the process requirement of multistage water washing only by one device. Two washing tanks and two sets of mud-water separation devices are needed for two-stage washing in the traditional process, three washing tanks are needed for three-stage washing, the washing times of the device can be flexibly selected according to the process requirements by only one set of equipment, the investment cost is reduced, and the flexibility of the field process is improved.

(2) Compare filtration efficiency faster with current vacuum filtration device, be difficult to take place the problem that the mud cake blockked up.

Drawings

FIG. 1 is a front view of a vacuum filtration apparatus of the present invention;

FIG. 2 is a left side view of a vacuum filtration apparatus of the present invention;

FIG. 3 is a cross-sectional view of a vacuum filtration apparatus of the present invention;

FIG. 4 is a top view of a vacuum filtration apparatus of the present invention;

FIG. 5 is a schematic diagram of a capillary filter tube;

FIG. 6 is a cross-sectional view of a capillary filter tube;

the notation in the figure is:

1-a filtering tank body, 2-lifting lugs, 3-a rotational flow air inlet, 4-a vacuumizing hole, 5-a muddy water discharging hole, 6-a filtrate outlet, 7-a capillary filtering pipe, 71-a filtering pipe main body, 72-a hollow cavity, 73-a capillary hole and 8-a supporting plate.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

In the following embodiments or examples, functional components or structures that are not specifically described are all conventional components or structures that are adopted in the art to achieve the corresponding functions.

In order to realize that water washing, stirring and filtering are completed in the same device, the invention provides a vacuum filtration device based on fly ash water washing process mud-water separation, which is shown in figures 1 to 4 and comprises a filtration tank body 1 and a filtration assembly, wherein the filtration assembly is arranged in an internal cavity of the filtration tank body 1 and divides the internal cavity into a pre-filtration cavity and a post-filtration cavity, the filtration tank body 1 is also provided with a rotational flow air inlet assembly communicated with the pre-filtration cavity, and the rotational flow air inlet assembly is connected with an external air supply pipeline and forms rotational flow in the pre-filtration cavity.

In some embodiments, referring to fig. 1 and the like, the cyclone air inlet assembly includes a plurality of cyclone air inlets 3 distributed on the filtering tank 1, and all the cyclone air inlets 3 extend into the pre-filtering cavity along the circumferential direction in an inclined manner, so that the compressed air fed through the cyclone air inlets 3 forms a cyclone in the pre-filtering cavity.

In a more specific embodiment, all of the swirl inlets 3 are inserted obliquely into the pre-filter chamber at the same angle.

In a more specific embodiment, 4 swirl inlets 3 are provided.

In some embodiments, referring again to fig. 4, the filter assembly comprises a support plate 8 transversely disposed on the internal cavity of the filter tank 1, and a capillary filter tube 7 mounted on the support plate 8. The shape of the capillary filter tube 7 can be seen from fig. 5 and 6, and it includes a filter tube main body 71 with a hollow cavity 72, the upper end of the hollow cavity 72 is sealed, the lower end is communicated with the filtered cavity, and at the same time, a plurality of through capillary holes 73 are sealed on the side wall of the filter tube main body 71.

In a more specific embodiment, the capillary filter tubes 7 are vertically arranged on the support plate 8, and the bottoms of the capillary filter tubes 7 are communicated with the post-filter cavity.

In some specific embodiments, please refer to fig. 1 and the like, a vacuum-pumping hole 4 communicating with the post-filter cavity is further disposed on the filter tank body 1.

In some specific embodiments, please refer to fig. 1 and the like, the filter tank 1 is further provided with a sludge water discharging hole 5 which is communicated with the pre-filter cavity and is positioned just above the filter assembly.

In some embodiments, the upper end of the filtering tank 1 is open.

In some specific embodiments, please refer to fig. 1 and the like again, a lifting lug 2 is further disposed on the filtering tank body 1, and a filtrate outlet 6 is further disposed at the bottom of the filtering tank body 1.

The above embodiments may be implemented individually, or in any combination of two or more.

The above embodiments will be described in more detail with reference to specific examples.

Example 1:

a set of pilot-scale test system is manufactured on a project site, a two-stage water washing and filtering process is carried out by adopting a filtering tank body 1, fly ash and water are mixed in a pulping tank according to a certain proportion to form slurry, the slurry is pumped into the filtering tank body 1 and enters from an upper opening, a cyclone air inlet 3 is opened at the moment, the slurry is directly blown by surrounding compressed air to form a cyclone, the stirring effect is exerted, the air inlet is closed after ten minutes of stirring, a vacuumizing hole 4 is opened at the moment, mud and water are separated through vacuum filtration, separated mud cakes are remained above a supporting plate 8, filtrate is discharged through a filtrate outlet 6, a certain amount of clear water is added again at the moment, secondary water washing is carried out, the cyclone air inlet 3 is opened after the clear water is added, the slurry is discharged from a mud and water discharging hole 5 after stirring and enters a mud and water separating device at the next step, and the separated mud cakes can meet the flexible landfill standard. In this embodiment, the shape of the capillary filter tube 7 can be seen from fig. 5 and 6, and it includes a filter tube main body 71 with a hollow cavity 72, the upper end of the hollow cavity 72 is sealed, the lower end is communicated with the filtered cavity, and meanwhile, a plurality of through capillary holes 73 are sealed on the side wall of the filter tube main body 71.

This embodiment is different from conventional water washing device, collects washing stirring and mud-water separation in an organic whole, and can require convenient regulation washing number of times according to the technology, need not additionally increase equipment. The capillary filter tube 7 in the device greatly improves the suction filtration efficiency, effectively prevents the phenomenon of blocking due to caking of mud cakes, and can be smoothly carried out through pilot-scale research, and the treated fly ash meets the standard of entering a flexible landfill.

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.