CN202499816U - Device for removing heavy metals from fertilizer made from household garbage - Google Patents

Abstract

The heavy metal removal device for making fertilizer from domestic waste is an important process equipment to solve the problem that the heavy metal content of organic fertilizer is difficult to meet the standard. It is a large cylindrical tank with a top connected to a slurry inlet, a batching port, and a tapered bottom, in which a spindle driven by a motor is installed. The upper part of the device is an organic material fermentation bin, the main shaft in the bin is equipped with stirring blades, the lower part of the bin is equipped with a bearing fixing plate and a slurry outlet and a control valve; the conical bottom is a heavy material bin, and the lower part of the bin is equipped with a screw wringer , The outlet is equipped with an electric valve and a heavy material discharge slide. The device achieves the purpose of removing molecular and ionic heavy metals in the domestic waste slurry through the separation of ingredients, complexation and precipitation, and heavy metal compounds are wrung out from the heavy material bin, and solves the problem of using domestic waste and sludge from sewage treatment plants to produce organic matter. The heavy metal content of fertilizers is seriously exceeding the standard. At the same time, it took the opportunity to implement anaerobic fermentation of organic matter in the organic material fermentation bin, shortening the production cycle of organic fertilizers.

Description

Household waste fertilizer heavy metal removal device

technical field

The utility model relates to a key technical equipment for making fertilizer from domestic garbage—a heavy metal removing device for making fertilizer from domestic garbage.

Background technique

The biggest problem with using general composting methods to treat urban domestic waste is that the heavy metal content of organic fertilizers produced by composting seriously exceeds the standard, which in turn will lead to soil poisoning and excessive heavy metal content in agricultural products, endangering human health. The technical key to the harmless treatment of domestic waste is to remove heavy metals such as mercury, cadmium, chromium, lead, arsenic, including molecular and ionic heavy metals that exist in domestic waste. Now the domestic waste fertilizer method has come out, and the process of removing heavy metals, including molecular and ionic heavy metals, is indispensable in its production process, which can only be realized with the help of equipment matching the process. The heavy metal removal device for making fertilizer from domestic waste is designed for this purpose.

Utility model content

The purpose of the utility model is to design a device for removing heavy metals against the danger that heavy metals must be removed in making fertilizer from domestic garbage. While the device is used to remove heavy metals, it also has the function of anaerobic fermentation to shorten the fermentation period of garbage fertilizer.

The principle of the utility model is: using the difference in specific gravity between organic matter and inorganic matter, there is a difference in buoyancy in water, using the precipitation method as the basic method, first use sodium humate to destroy and separate the molecular state and ion state heavy metals contained in the plant body; Under the power of mechanical stirring, the organic matter is flocculated with the help of the function of the flocculant; and then the metal complexing agent is used to chelate molecular and ionic heavy metals to form heavy metal conjugates, which quickly precipitate to the bottom of the bottom layer, and then wring them out ( Collecting and refining) to achieve the purpose of removing heavy metals and eliminating hazards; at the same time, using the opportunity of the top of the tank of the device to be sealed and the supernatant to isolate the air, anaerobic fermentation is carried out with the help of cellulolytic bacteria and yeasts to shorten the time for making fertilizer from domestic waste. Production cycle.

The heavy metal removal device for domestic waste fertilizer production consists of a large cylindrical tank (cone-shaped bottom), a main shaft, a motor, a slurry inlet pipe, a batching port, an organic material fermentation bin, a stirring blade, a slurry outlet and a control valve, a heavy material bin, It is composed of screw twister, heavy material discharge slide plate, bearing fixing plate, supporting legs, etc. Its structural characteristics are:

The main shaft 2 is installed in the cylindrical large tank 1, and the main shaft is driven by the motor 3 to rotate, and the slurry inlet pipe 4 and the batching port 5 are connected on the top; the organic material fermentation bin 6 main shaft on the upper part of the cylindrical large tank is equipped with a stirring Leaf 7, the lower part of the bin is equipped with a bearing fixing plate 8 and a slurry outlet and a control valve 9; a screw twister 11 is installed on the main shaft of the conical heavy material bin 10 of the large tank, and an electric valve 12 is installed at the outlet of the lower part of the heavy material bin And heavy object discharging slide plate 13; Support leg 14 is installed at the bottom of cylindrical tank.

Advantages and positive effects of this device:

The device separates the molecular and ionic heavy metals contained in the domestic waste through batching (adding sodium humate, complexing agent, flocculant, cellulolytic bacteria, yeast, etc. to the slurry) and stirring Combine and flocculate into a combined object, settle to the bottom of the heavy material bin and be wrung out, to achieve the purpose of removing heavy metal hazards; at the same time, use the opportunity of the supernatant in the tank to isolate the air to implement anaerobic fermentation, shorten the production cycle of garbage fertilizer, and solve it in one fell swoop It solves the problems of harmless disposal of domestic waste and making fertilizer from domestic waste. In addition, it can also be applied to sludge fertilizer production in sewage treatment plants to solve the problem of excessive heavy metal content in sludge fertilizer production.

Description of drawings

Figure 1: Schematic diagram of the structure of the heavy metal removal device for fertilizer production from domestic waste.

As shown in the figure: 1. Cylindrical large tank 2. Main shaft 3. Motor 4. Slurry inlet pipe 5. Batching port 6. Organic material fermentation bin 7. Stirring blade 8. Bearing fixing plate 9. Slurry outlet and control valve 10. Heavy material bin 11. Spiral wringer 12. Heavy material outlet electric valve 13. Heavy material discharge slide 14. Support legs

Detailed ways

The homogenate obtained by refining and beating is pumped into the large cylindrical tank 1 through the slurry inlet pipe 4, and sodium humate (to separate heavy metal ions in the plant), defoamer (to eliminate the tide of the slurry), and complexing are added through the batching port 5. agent (chelating molecular state, ionic state heavy metal), flocculant (flocculation of organic substances), cellulolytic bacteria (decomposition of plant fibers), yeast, Aspergillus niger (acceleration of deep anaerobic fermentation of organic materials), etc., start the motor 3 first The rotation drives the main shaft 2 and the stirring blade 7 in the organic material fermentation bin 6 to rotate (to prevent excessive precipitation), so as to promote the separation of molecular and ionic heavy metals in the domestic waste slurry, complexation and flocculation to form different combinations, and to the bottom precipitation. Construction waste and heavy metal chelates whose specific gravity is greater than water are in the bottom of the cone in the heavy material bin 10 in layers.

When discharging, let the motor 3 reverse to drive the main shaft 2 and the screw twister 11 in the heavy material bin, and twist out the heavy metal and construction waste through the electric valve 12 according to the level (to prevent the agglomeration from being difficult to discharge, use the screw to twist out) , falls to heavy object discharging slide plate 13 and slides out and recycles.

According to the operating procedures, after stirring for 3 hours, seal and let stand for 12-24 hours, the slurry in the organic material fermentation bin on the upper part of the cylindrical tank can achieve the effect of anaerobic fermentation, and then it is drawn out through the slurry outlet and the control valve 9 into the lower One process (dehydration, batching, adjustment of C:N, C:P and PH value, high-temperature mineralization and aerobic fermentation, and finally made into bio-organic fertilizer).

Claims (1)

1. domestic refuse composting heavy metal device for eliminating; By the bottom is that the big jar of round shape, main shaft, motor, inlet pipe, ingredients mouth, organic materials fermentation cabin, paddle, slurry outlet and valve, weight feed bin, the spiral of taper twists out device, weight discharging slide plate, bearing (setting) plate, supporting leg and form, and its constitutional features is:

In round shape big jar (1), main shaft (2) is installed, is driven main axis rotation by motor (3), and connect inlet pipe (4) and ingredients mouth (5) at its top; On organic materials fermentation cabin (6) main shaft on big jar of top of round shape, paddle (7) is housed, this bottom, storehouse is installed bearing (setting) plate (8) and is provided with slurry outlet and valve (9); On big jar of taper weight feed bin (10) main shaft, spiral is housed and twists out device (11), weight feed bin lower part outlet is equipped with electrically operated valve (12) and weight discharging slide plate (13); At the big pot bottom of round shape supporting leg (14) is installed.

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