CN212051027U

CN212051027U - Resource system for preparing compound fertilizer by using sludge

Info

Publication number: CN212051027U
Application number: CN201922368065.2U
Authority: CN
Inventors: 潘波; 张鹏; 熊迎春; 张铭; 石春光; 胡付祥
Original assignee: Fujian Longking Co Ltd.
Current assignee: Fujian Longking Co Ltd.
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-12-01
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses an utilize resourceization system of mud preparation compound fertilizer relates to mud resourceization technical field. The device comprises a material conditioning tank, a sludge storage tank, a high-pressure plate-and-frame filter press, an aerobic fermentation system and a biological filter. The utility model discloses an add a small amount of lemery salt and trace silicon magnesium element, make the method of microorganism compound fertilizer, the utilization scope of promotion mud compost material that can be great has increased the sales road that mud land utilized.

Description

Resource system for preparing compound fertilizer by using sludge

Technical Field

The utility model relates to a mud resourceization technical field, the more specifically it is a resource system that utilizes mud preparation compound fertilizer that says so.

Background

At present, with the development of urbanization in China, the development of sewage treatment in China is fast, and the sewage treatment is close to or reaches the level of developed countries, but the sludge treatment is delayed seriously. The annual output of municipal sludge in China is estimated to reach 6000 to 9000 ten thousand tons in 2020. The sludge contains pathogenic microorganisms, parasitic ova and other pathogenic substances, copper, zinc, chromium and other heavy metals, polychlorinated biphenyl, dioxin and other refractory toxic and harmful substances, and if the sludge is not properly treated, the sludge is easy to cause secondary pollution to the environment.

The sludge treatment aims at firstly reducing, stabilizing and harmlessly treating sludge and secondly recycling sludge. At present, the main sludge treatment methods include: sanitary landfill, building material utilization, incineration disposal and land utilization.

1) The sanitary landfill is to transport the pretreated sludge to a landfill site for landfill. The scheme is simple and feasible, the treatment efficiency is high, and the treatment cost is most economical under the condition that the distance between the treatment cost and the landfill site is close. However, the method has the disadvantages of large occupied area, long treatment period and low dehydration degree, and sludge forms leachate which pollutes underground water environment or blocks leachate pipelines. Organic substances release gases that cause air pollution and risk explosion.

2) The building material utilization refers to brick making by mixing and sintering dried sludge and clay in a proper proportion, and the utilization ratio is low at present. The product quality that this scheme low-cost was dealt with is poor, has secondary pollution phenomenon. The method is safe and high in quality and cost.

3) The incineration treatment can completely remove the water and organic matters in the sludge and kill pathogens. Compared with other methods, the method has the advantages of highest reduction degree and most thorough harmless degree, and creates benefits in preheating and power generation. However, the incineration disposal facilities have large investment and high operating cost.

4) Land utilization refers to the use of sludge or its products as fertilizer or soil improvement material that has been properly treated to meet certain standards. Is an active and sustainable sludge final disposal mode. Its advantages are less investment, low running cost, full use of organic substances, heavy metal pollution, low effect of agricultural fertilizer and limited popularization.

In the long run, along with the strict control of water treatment by the nation, the harmful components in the sludge can be gradually reduced, and the proportion of land utilization can be stably improved under the support of popularization and policy of land utilization. How to optimize a sludge recycling system and improve the recycling utilization efficiency of sludge is a problem which needs to be researched and solved urgently at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcomings of the background technology and providing a recycling system for preparing compound fertilizer by utilizing sludge.

In order to realize the purpose, the technical scheme of the utility model is that: utilize resourceful system of mud preparation compound fertilizer, its characterized in that: comprises a biological conditioning tank, a sludge storage tank connected with the biological conditioning tank, a high-pressure plate-and-frame filter press connected with the sludge storage tank, an aerobic fermentation system connected with the high-pressure plate-and-frame filter press, and a biological filter tank connected with the aerobic fermentation system.

In the technical scheme, the high-pressure plate-and-frame filter press is also connected with a sewage treatment regulating tank (6).

Compared with the prior art, the utility model has the advantages of it is following:

1) the degradation rate (calculated by COD) of organic matters of the sludge biologically conditioned by the biological conditioning tank can reach about 30 percent, so that the odor of the sludge disappears, the interference of the dewatered sludge on the operation environment is greatly reduced, and the environmental risk brought to the subsequent treatment of the sludge can be avoided.

2) The biological nutrient added into the sludge is less in addition amount, and the sludge conditioning cost is low; the biological nutrient does not contain any toxic and harmful substances, is a nutrient element for plant growth, and is green and environment-friendly.

3) After the sludge is dehydrated, the water content is low, and the time of the resource process is shortened to a certain extent.

4) The utility model discloses an add a small amount of lemery salt and trace silicon magnesium element, make the method of microorganism compound fertilizer, the utilization scope of promotion mud compost material that can be great has increased the sales road that mud land utilized.

Drawings

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

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be apparent and readily appreciated by the description.

With reference to the accompanying drawings: a recycling system for preparing a compound fertilizer by utilizing sludge comprises a biological conditioning tank 1, a sludge storage tank 2 connected with the biological conditioning tank 1, a high-pressure plate-and-frame filter press 3 connected with the sludge storage tank 2, an aerobic fermentation system 4 connected with the high-pressure plate-and-frame filter press 3, and a biological filter tank 5 connected with the aerobic fermentation system 4.

The high-pressure plate-and-frame filter press 3 is also connected with a sewage treatment regulating tank 6.

The use method of the resource system for preparing the compound fertilizer by using the sludge comprises the following steps:

step 1: adding an inoculum and a biological nutrient into the sludge, and introducing the sludge into a biological conditioning tank 1;

step 2: the sludge is stirred and cultured for 3-6 days at room temperature in an oxygen-deficient environment without oxygen supply, and when the specific impedance of the sludge in the biological conditioning tank 1 is lower than a proper value, the sludge is discharged into the sludge storage tank 2; the content of sludge extracellular polymers and the viscosity of sludge are reduced by utilizing the action of the composite biological flora, and the endogenous digestion of the sludge is accelerated, so that the sludge dewatering performance is greatly improved;

and step 3: adding a chemical conditioner into the sludge for chemical conditioning, and then performing filter pressing and dehydration on the sludge through a high-pressure plate-and-frame filter press 3;

and 4, step 4: the dehydrated sludge enters an aerobic fermentation system 4, the temperature is controlled to be 55-60 ℃, the aeration condition is adopted, the sludge is subjected to aerobic fermentation, and pathogens in the sludge are killed; the fermentation process is exothermic, so the temperature is controlled by ventilation without being too high, the growth of organisms is not influenced at the temperature of 55-60 ℃, and germs are killed;

and 5: in the process of sludge fermentation, the generated odor is introduced into the biological filter 5 to generate pollution-free gas which is discharged into the atmosphere;

the sludge after biological conditioning meets the requirements of aerobic fermentation. After entering an aerobic fermentation system, organic matters in the sludge are degraded under the action of aerobic fermentation microorganisms, and meanwhile, heat released by aerobic reaction forms high temperature (55-60 ℃) to kill pathogenic microorganisms and further reduce the moisture of the sludge, thereby realizing the processes of sludge reduction, stabilization and harmlessness;

step 6: adding K into the fermented clinker₂SO₄Granulating, sorting and packaging to form the sludge compound fertilizer; a small amount of potassium sulfate and trace silicon-magnesium elements are added to prepare the microbial compound fertilizer, and the fertilizer can be used for crops such as fruits and vegetables and the like, so that the problem of single fertilizer effect of sludge resource utilization is solved;

in the step 1, the water content of the sludge is 96-98%; in the step 3, the water content of the sludge after filter pressing dehydration is below 60 percent.

And 3, introducing a filtrate generated after the sludge is subjected to filter pressing and dehydration into a sewage treatment regulating tank 6, and then treating through subsequent processes.

Other parts not described belong to the prior art.

Claims

1. Utilize resourceful system of mud preparation compound fertilizer, its characterized in that: comprises a biological conditioning tank (1), a sludge storage tank (2) connected with the biological conditioning tank (1), a high-pressure plate-and-frame filter press (3) connected with the sludge storage tank (2), an aerobic fermentation system (4) connected with the high-pressure plate-and-frame filter press (3), and a biological filter tank (5) connected with the aerobic fermentation system (4).

2. The resource system for preparing compound fertilizer by using sludge as claimed in claim 1, which is characterized in that: the high-pressure plate-and-frame filter press (3) is also connected with a sewage treatment regulating tank (6).