阅读说明：本技术 一种滤池过滤结构及多层滤料滤池 (Filter structure of filter tank and multi-layer filter material filter tank ) 是由 李朋 侯锋 曹效鑫 邵彦青 卢先春 庞洪涛 于 2020-09-01 设计创作，主要内容包括：本发明提供了一种多层滤料上向流滤池的过滤结构及多层滤料上向流滤池,包括玻璃滤料层和石英砂滤料层；所述玻璃滤料层位于所述石英砂滤料层的上侧；所述玻璃滤料层的滤料粒径小于所述石英砂滤料层的滤料粒径。通过上层采用小粒径滤料,下层采用较大粒径的滤料,避免了单层滤料截留效果和纳污能力无法兼具的问题,保证较大纳污能力同时,减少反洗能耗。上层小粒径滤料厚度为0.1m-0.3m,避免了大量采用小粒径玻璃滤料增加成本。本发明充分发挥下层滤料高纳污能力的优势,上层滤料主要截留去除细小悬浮物,同时具备一定的吸附性能,保证出水中悬浮物、总氮、总磷等指标稳定满足常规滤池无法达到的要求。(The invention provides a filter structure of a multilayer filter material upward flow filter and a multilayer filter material upward flow filter, comprising a glass filter material layer and a quartz sand filter material layer; the glass filter material layer is positioned on the upper side of the quartz sand filter material layer; the grain size of the filter material of the glass filter material layer is smaller than that of the filter material of the quartz sand filter material layer. Adopt small-grain diameter filter material through the upper strata, the filter material of great particle diameter is adopted to the lower floor, has avoided the problem that effect and pollutant carrying capacity can't have concurrently is held back to the individual layer filter material, guarantees when great pollutant carrying capacity, reduces the backwash energy consumption. The thickness of the upper layer small-grain-size filter material is 0.1m-0.3m, so that the cost increase caused by adopting a large amount of small-grain-size glass filter materials is avoided. The invention gives full play to the advantage of high dirt-accepting capacity of the lower layer filter material, the upper layer filter material mainly intercepts and removes fine suspended matters, and simultaneously has certain adsorption performance, thereby ensuring that indexes such as suspended matters, total nitrogen, total phosphorus and the like in the outlet water stably meet the requirements which cannot be met by the conventional filter.)

1. A filter structure of a filter tank is characterized by comprising a glass filter material layer and a quartz sand filter material layer;

the glass filter material layer is positioned on the upper side of the quartz sand filter material layer;

the grain size of the filter material of the glass filter material layer is smaller than that of the filter material of the quartz sand filter material layer.

2. A filter bed filter construction according to claim 1, wherein the layer thickness of the glass filter material layer is smaller than the layer thickness of the quartz sand filter material layer.

3. A filter pool filter structure according to claim 1, wherein said quartz sand filter material layer has a filter material particle size of 1-4mm and a density of 2.5-2.6kg/cm³。

4. A filter bed filter construction according to claim 1, wherein the quartz sand filter material layer has a layer thickness of 0.7-2.7 m.

5. A filter pool filter structure according to claim 1, wherein said glass filter material layer has a filter material grain size of 0.4-2mm and a density<2.5kg/cm³。

6. A filter bed filter construction according to claim 1, wherein the layer thickness of the glass filter bed is 0.1-0.3 m.

7. A filter bed filter structure according to claim 1, wherein the surface of the quartz sand filter bed is attached or not attached with a biofilm, and the surface of the glass filter bed is not grown with a biofilm.

8. A filter cartridge filter structure, comprising: the filter material layers are stacked up and down to form a multi-layer filter material layer structure;

the grain sizes of the filter materials among the filter material layers are different;

wherein, between two liang of filter material layers, the filter material layer that the filter material particle size is big and density is big is located the downside.

9. A filter with multiple layers of filter materials, which is characterized by comprising an upward flow filter and a filter structure arranged in the upward flow filter, wherein the filter structure comprises the filter structure of the filter with multiple layers of filter materials, which is disclosed by any one of claims 1 to 8.

10. The filter with multiple layers of filter material of claim 9, wherein the water inlet of the upflow filter is located below the filter structure and the water outlet is located above the filter structure.

Technical Field

The invention relates to the technical field of water treatment, in particular to a filter structure of a filter tank and a multi-layer filter material filter tank.

Background

The filter tanks for the advanced treatment of water supply and sewage are various in types, and the filter materials are various in forms. The upward flow filter chamber has the advantages of high sewage receiving amount and difficult blockage compared with the downward flow filter chamber. Patent document CN106365237A discloses a method and a device for deep dephosphorization of sewage. The device specifically adopts a physical adsorption method of a nano composite material and an upward flow filter tank to deeply remove phosphorus in sewage, and the device consists of a rapid mixer and the upward flow filter tank. The filtering speed of the upward flow filtering pool is generally higher than that of the downward flow filtering pool, so the upward flow filtering pool occupies smaller area and is more suitable for being applied to a tense land or a sunken regeneration water plant.

The filter can be divided into a single-layer filter material, a double-layer filter material, a three-layer filter material and the like according to the number of layers of the filter material, the single-layer uniform graded filter takes quartz sand or ceramsite filter material as a main material, and the particle size range of the filter material has great influence on the water quality of effluent and backwashing energy consumption. The particle size is small, the effluent quality is high, the pollutant carrying capacity is small, and the backwashing energy consumption is high; large particle size, poor effluent quality, large pollutant carrying capacity and low backwashing energy consumption.

In a typical downward flow three-layer filter, anthracite filter materials with large particles and small relative density are distributed on an upper layer; the filter material quartz sand with relative density in the medium particles is distributed in the middle layer; the magnetite (or garnet) filter material with small particles and large relative density is arranged on the lower layer, the typical downward flow double-layer filter tank generally adopts anthracite on the upper layer and quartz sand on the lower layer, and the layered main purpose is to solve the problem that the filter material pollutant carrying capacity and the effluent quality in a single particle size range can not be considered, the large particle size filter material on the upper layer removes large particle pollutants, and the small particle size filter material on the lower layer removes small particle pollutants. However, in the practical application process, the anthracite has low strength, backwashing is easy to run off, the magnetite has high density, the backwashing energy consumption can be increased, and the layered filter materials are easy to generate a filter material mixing layer, so that the application of the single-layer uniform graded filter is more common in the practical application process.

The upward flow filter tank does not have the phenomenon that the density of filter materials in the downward flow filter tank is increased along the filtering direction, so that the pollutant carrying capacity of the filter bed can be fully exerted, higher pollutant carrying capacity can be realized without layering, and the pollutant removing effect is lower than that of the downward flow filter tank. In order to obtain better effluent quality, a method of reducing the filtration rate is generally adopted, but the method causes the problems of increasing the occupied area and investment.

Therefore, the conventional filter tank can not effectively solve the problem of contradiction between the quality of outlet water and the pollutant carrying capacity, how to ensure the removal effect of pollutants such as suspended matters in water and the like, and meanwhile, the conventional filter tank does not reduce the filtration rate, improves the pollutant carrying capacity as much as possible, reduces the blockage, and reduces the backwashing frequency and the operation cost, which is a difficult problem to solve in the application of the filter tank engineering.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a filter structure of a filter tank and a multi-layer filter material filter tank.

The filter chamber filtering structure provided by the invention comprises a glass filter material layer and a quartz sand filter material layer;

the glass filter material layer is positioned on the upper side of the quartz sand filter material layer;

the grain size of the filter material of the glass filter material layer is smaller than that of the filter material of the quartz sand filter material layer.

Preferably, the layer thickness of the glass filter material layer is smaller than that of the quartz sand filter material layer.

Preferably, the grain diameter of the filter material of the quartz sand filter material layer is 1-4mm, and the density is 2.5-2.6kg/cm³。

Preferably, the layer thickness of the quartz sand filter material layer is 0.7-2.7 m.

Preferably, the filter material of the glass filter material layer has the grain diameter of 0.4-2mm and the density<2.5kg/cm³。

Preferably, the layer thickness of the glass filter layer is 0.1 to 0.3 m.

Preferably, the surface of the quartz sand filter material layer is attached or not attached with a biological film, and the surface of the glass filter material layer is not grown with the biological film.

According to the present invention, there is provided a filter structure of a filter tank, comprising: the filter material layers are stacked up and down to form a multi-layer filter material layer structure;

the grain sizes of the filter materials among the filter material layers are different;

wherein, between two liang of filter material layers, the filter material layer that the filter material particle size is big and density is big is located the downside.

The multilayer filter material filter tank provided by the invention comprises an upward flow filter tank and a filter structure arranged in the upward flow filter tank, wherein the filter structure comprises the filter structure of the multilayer filter material upward flow filter tank.

Preferably, the water inlet of the upward flow filter is positioned below the filter structure, and the water outlet is positioned above the filter structure.

Compared with the prior art, the invention has the following beneficial effects:

1. through adopting the upper strata to adopt small-grain diameter filter material, the filter material of great particle diameter is adopted to the lower floor, has avoided the problem that effect and pollutant carrying capacity can't have concurrently is held back to the individual layer filter material, guarantees when great pollutant carrying capacity, reduces the backwash energy consumption.

2. The upward flow mode is adopted, the advantage of high pollutant carrying capacity of the lower layer filter material is fully exerted, a production biomembrane can be attached synchronously, the removal effects of microorganisms on BOD, total nitrogen and the like are exerted, and the water quality is further improved; the upper-layer filter material mainly intercepts and removes suspended matters, and has certain adsorption performance, so that indexes such as suspended matters, total phosphorus and the like in the effluent can be ensured to stably meet the requirements which cannot be met by the conventional filter. Under the condition of keeping higher filtering speed, better effluent quality is obtained, land occupation and investment are saved, and the method is particularly suitable for a sinking type regeneration water plant with high requirement on land conservation.

3. Compared with the traditional single-layer filter (with the same filter material particle size range), the double-layer filter material structure has the advantages that the pollutant carrying capacity, the backwashing frequency and the backwashing energy consumption are equivalent, and the effluent quality is better; compared with a downward flow multi-layer filter, the sewage receiving capacity is larger, the backwashing frequency is longer, the backwashing energy consumption is lower, and the effluent quality is equivalent. Meanwhile, the upper glass filter material layer only needs 0.1-0.3m, so that the constructed upward flow filter tank is easy to transform, the standard improvement transformation is realized, or a newly-built project is implemented step by step according to the effluent quality requirements of different stages, different effluent qualities are met, the investment and the operation cost are further saved, and the application mode is flexible.

4. The filter tank has the characteristics of high ascending flow rate, small floor area and good effluent quality, and is particularly suitable for a sinking type regeneration water plant with high requirement on land conservation and the upgrading and the expansion of the existing sewage treatment plant.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic diagram of a filter structure according to the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.