CN212222731U

CN212222731U - Efficient heavy metal removing sewage treatment equipment

Info

Publication number: CN212222731U
Application number: CN202020413471.6U
Authority: CN
Inventors: 阎蕾
Original assignee: Qingdao Huace Detection Technology Co ltd
Current assignee: Qingdao Huace Detection Technology Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-12-25
Anticipated expiration: 2030-03-26

Abstract

The utility model relates to a high-efficient sewage treatment device who gets rid of heavy metal, environmental protection purification unit technical field. The filter comprises a box body with a water inlet and a water outlet, and a multistage filter layer consisting of a first stage filter component, a second stage filter component, a third stage filter component and a fourth stage filter component, which are arranged in the box body; the first-stage filtering component is a quartz sand filtering material device, the second-stage filtering component is a heavy metal chelating agent composite chitosan adsorption filtering layer, the third-stage filtering component is a microorganism adsorption layer, and the microorganism adsorption layer is provided with a sphere with microorganisms attached to the surface; the fourth stage filter component is a granular activated carbon adsorption device. The equipment can effectively reduce the concentration of heavy metal, improve the quality of effluent water and enable the treated water to reach the recycling standard; meanwhile, potential heavy metal resources can be recovered.

Description

Efficient heavy metal removing sewage treatment equipment

Technical Field

The utility model belongs to the technical field of environmental protection purification unit, especially, relate to a high-efficient sewage treatment device who gets rid of heavy metal.

Background

Along with the rapid development of social economy and the rapid increase of urban population, the discharge amount of urban sewage is increasing day by day. Municipal sewage becomes an important source of environmental pollution. The urban sewage contains a large amount of COD and NH₃N, heavy metals and the like. Heavy metals have the characteristics of high toxicity, durability, difficult degradability and the like, and are more and more concerned by scholars at home and abroad.Heavy metals entering water bodies through natural ways generally cannot pollute the water bodies, but because of human activities, a large amount of pollutants containing the heavy metals enter the water environments, not only is great economic loss caused, but also great influence is generated on ecological systems and human health. Heavy metal pollution has become one of the most serious problems in environmental pollution today.

In the existing sewage treatment equipment, a common sewage filtering device is a sandstone filter, the size of the sandstone filter is large, a filter element of the filter is easy to block a plate knot, so that the filtering effect is poor, a large amount of clear water is needed for backwashing after hardening, sewage generated by backwashing needs to be filtered again, and the sewage treatment efficiency of the sewage treatment equipment is low. Especially, the effect of purifying heavy metals is very poor, so that even the purified sewage is only pollution-reduced, and the condition of reutilization can not be achieved, thereby causing water resource waste.

The traditional method for removing metal ions comprises the following steps: chemical precipitation, chemical redox, activated carbon adsorption, ion exchange, solvent extraction, physical methods, membrane separation, and the like. These methods are effective under certain conditions, but have disadvantages such as high cost, complicated operation, and difficulty in treating low-concentration wastewater. However, the traditional sewage treatment method in China mostly takes a chemical method as a main method, secondary pollution is caused to sewage, and the treatment efficiency is not high, so that the invention of the sewage treatment equipment for efficiently removing heavy metals is necessary.

The biological adsorption method is a relatively new wastewater treatment technology, is particularly suitable for treating large-volume low-concentration heavy metal wastewater, and has the advantages of low investment, low operation cost, high adsorption rate, high selectivity, no secondary pollution and the like. It has now been found that there are some potential biosorbent materials with very high metal adsorption capacity, such as marine algae, bacteria, fungi, yeasts and waste biomass in the food industry of the fermentation industry. The saccharomyces cerevisiae is widely used in food and beverage industries, is a solid waste material, is a biological adsorbent with practical potential, and can be used as an ideal material for researching heavy metal biological adsorption mechanism.

SUMMERY OF THE UTILITY MODEL

In order to realize the advanced treatment of sewage and overcome the defects of the traditional technology for removing heavy metal ions, the utility model aims to provide a device for treating large-volume low-concentration heavy metal wastewater, which can effectively reduce the concentration of heavy metal and improve the quality of effluent water, so that the treated water can reach the recycling standard; meanwhile, potential heavy metal resources can be recovered.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a sewage treatment device for efficiently removing heavy metals comprises a box body with a water inlet and a water outlet, and a first-stage filtering component, a second-stage filtering component, a third-stage filtering component and a fourth-stage filtering component which are arranged in the box body; a sewage draining outlet is formed in the bottom end of the interior of the box body; the inner wall of the box body is coated with an Al-Ni-Zn ternary alloy scale prevention layer, the second-stage filtering component is a heavy metal chelating agent composite chitosan adsorption filtering layer, the third-stage filtering component is a microorganism adsorption layer, and the microorganism adsorption layer is provided with a sphere with a microorganism attached to the surface.

Further, the first-stage filtering component is a quartz sand filtering device.

Further, the third stage filtering component is a granular activated carbon adsorption device.

Further, the heavy metal chelating agent is disodium ethylene diamine tetraacetate.

Furthermore, the thickness of the quartz sand filter material layer is 15-25cm, the thickness of the heavy metal chelating agent composite chitosan adsorption filter layer is 15-20cm, the thickness of the microorganism adsorption layer is 5-10cm, and the thickness of the granular activated carbon layer is 10-15 cm.

Wherein, the utility model discloses mainly get rid of aquatic impurity and heavy metal through multistage filtration, and specifically through flocculating agent, metal chelator and microorganism three combined action, the purifying effect of water has been strengthened, the water quality improves and is showing, the water becomes the clarification, the stink is eliminated, water hardness reduces, dissolved oxygen volume increases, the content of water ammonia nitrogen and nitrate nitrogen reduces, heavy metal ion reduces, the pathogenic bacterium reduces, the suspended solid and the harmful alga in the aquatic reduce, aquatic animal and plant disease reduces, the degradation of aquatic pollutant is accelerated, aquatic ecological development is healthy and benign. In addition, the inner wall of the box body is coated with an Al-Ni-Zn ternary alloy scale prevention layer, so that the generation of scales and the like can be reduced to the maximum extent, and the sewage treatment effect is ensured.

The flocculant is chitosan, can provide a large amount of complex ions, can strongly adsorb colloid particles, and can coagulate the colloid through the actions of adsorption, bridging and crosslinking. Meanwhile, the physical and chemical changes are generated to neutralize the charges on the surfaces of the colloidal particles and suspended matters, so that the colloidal particles are changed from original repulsion to attraction, the stability of micelles is damaged, and the colloidal particles collide with each other to form flocculent coagulating sedimentation.

The metal chelating agent is disodium ethylene diamine tetraacetate, is a compound containing two or more electron-donating groups, can be complexed with various metal cations such as calcium, magnesium, lead, zinc, iron, chromium, copper, lead, mercury and the like in a water body, reduces the hardness of water, and removes the toxic action of heavy metal ions on aquatic products.

The method adopts multi-stage filtration and adsorption, and utilizes the characteristic of strong adsorption capacity of microorganisms to take the microorganisms as an ideal adsorption material of heavy metal ions; the interception function of quartz sand filtration is utilized to ensure that the adsorption reaction is smoothly carried out; the further adsorption effect of the granular activated carbon on the pollutants difficult to degrade is utilized to achieve the advanced treatment effect of the sewage. Industrial waste thalli saccharomyces cerevisiae is used as a biological adsorbent, and flocculating agent and metal chelating agent are used for flocculation adsorption, so that waste utilization is realized, and cost is reduced.

Compared with the prior art, a high-efficient sewage treatment device who gets rid of heavy metal have following advantage:

(1) the box body has a compact structure and small occupied area, a first-stage filtering component, a second-stage filtering component, a third-stage filtering component and a fourth-stage filtering component are arranged in the box body, and through multi-stage filtering and adsorption, numerous pollutants including heavy metals are effectively removed, so that the tool efficiency of the whole equipment is high;

(2) the filtering holes at all levels have different diameters and different directions, so that the effects of filtering pollutants and adsorbing heavy metals are enhanced;

(3) the inner wall of the box body is coated with an Al-Ni-Zn ternary alloy scale prevention layer, so that the generation of scale and the like can be reduced to the maximum extent, and the sewage treatment effect is ensured;

(4) the synergistic effect of chemical flocculation adsorption and microbial adsorption is adopted, and the biological adsorption material is industrial waste thalli, so that the investment is low and the cost is low;

(5) the adsorption material with saturated adsorption can be continuously used after desorption and regeneration, and the heavy metal ions in the desorption solution can be recycled after treatment.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.

Fig. 1 is a schematic structural diagram of the present invention.

Description of reference numerals: 1-a first stage filtration assembly; 2-a second stage filtration assembly; 3-a third stage filtration component; 4-a fourth stage filtration assembly; 5-Al-Ni-Zn ternary alloy scale prevention layer; 6, a box body; 7-a water inlet; 8-water outlet.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

A sewage treatment device for efficiently removing heavy metals is shown in figure 1 and comprises a box body 6 with a water inlet 7 and a water outlet 8, and a first-stage filtering component 1, a second-stage filtering component 2, a third-stage filtering component 3 and a fourth-stage filtering component 4 which are arranged in the box body; a sewage draining outlet is formed in the bottom end of the interior of the box body; the inner wall of the box body is coated with an Al-Ni-Zn ternary alloy scale prevention layer 5, wherein the second-stage filtering component 2 is a heavy metal chelating agent composite chitosan adsorption filtering layer, the third-stage filtering component 3 is a microorganism adsorption layer, and the microorganism adsorption layer is provided with a sphere with a surface attached with microorganisms.

Preferably, the first stage filtering component 1 is a quartz sand filtering device.

Preferably, the third stage filter assembly 3 is a granular activated carbon adsorption device.

Preferably, the heavy metal chelating agent is disodium ethylenediaminetetraacetate.

Preferably, the thickness of the quartz sand filter layer is 15-25cm, the thickness of the heavy metal chelating agent composite chitosan adsorption filter layer is 15-20cm, the thickness of the microorganism adsorption layer is 5-10cm, and the thickness of the granular activated carbon layer is 10-15 cm.

The utility model discloses a work efficiency is high, and pollutant treatment is effectual, and especially heavy metal gets rid of the effect, and the heavy metal clearance is more than 85%. The sewage can reach the condition of secondary utilization after the treatment of the utility model, and the water source is saved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage treatment device for efficiently removing heavy metals is characterized by comprising a box body with a water inlet and a water outlet, and a first-stage filtering component, a second-stage filtering component, a third-stage filtering component and a fourth-stage filtering component which are arranged in the box body; a sewage draining outlet is formed in the bottom end of the interior of the box body; the inner wall of the box body is coated with an Al-Ni-Zn ternary alloy scale prevention layer, the second-stage filtering component is a heavy metal chelating agent composite chitosan adsorption filtering layer, the third-stage filtering component is a microorganism adsorption layer, and the microorganism adsorption layer is provided with a sphere with a microorganism attached to the surface.

2. The sewage treatment equipment for efficiently removing the heavy metals according to claim 1, wherein the first-stage filtering component is a quartz sand filtering device.

3. The sewage treatment equipment for efficiently removing the heavy metals according to claim 2, wherein the fourth stage filtering component is a granular activated carbon adsorption device.

4. The sewage treatment equipment for efficiently removing the heavy metals according to claim 3, wherein the heavy metal chelating agent is disodium ethylene diamine tetraacetate.

5. The sewage treatment equipment for efficiently removing the heavy metals according to claim 4, wherein the thickness of the quartz sand filter layer is 15-25cm, the thickness of the heavy metal chelating agent composite chitosan adsorption filter layer is 15-20cm, the thickness of the microorganism adsorption layer is 5-10cm, and the thickness of the granular activated carbon layer is 10-15 cm.