CN201205420Y

CN201205420Y - Fly-ash solidification system

Info

Publication number: CN201205420Y
Application number: CNU2008200353018U
Authority: CN
Inventors: 陆永平; 朱惠清; 王长兵; 李峥伟
Original assignee: CHANGSHU RIXIN MACHINERY Co Ltd
Current assignee: CHANGSHU RIXIN MACHINERY Co Ltd
Priority date: 2008-05-08
Filing date: 2008-05-08
Publication date: 2009-03-11
Anticipated expiration: 2018-05-08

Abstract

The utility model provides a fly ash curing system. The fly ash, chelating agent and water are fully mixed, stirred and squeezed so as to fully capture heavy metals in the fly ash; the prepared stabilization product forms a polymer which is more compact than the fly ash before the processing process; the conglutination phenomenon occurs between the fly ash particles, which can stabilize the heavy metals in the fly ash for a long time; the activity of the heavy metals in the burning fly ash is greatly reduced; the stabilization product has the long-term stability in the sanitary landfill; the landfill pollution control standards for domestic wastes are achieved; and the domestic wastes can be landfilled into the ordinary sanitary landfill.

Description

Flyash curing system

Technical field

The utility model relates to the flying ash treatment technology, particularly relates to a kind of flyash curing system.

Background technology

Along with China's rapid development of economy, the output of municipal solid wastes is increased sharply.Since destructive strong, the volume of organic toxicity of municipal solid wastes subtracted hold obviously, advantage such as energy recovery, the burning electricity generation technology has become the important development direction of some soil anxieties of China, big city disposal of refuse that the municipal solid wastes organic principle is high at present.But municipal solid wastes burns flying ash that the back produces wherein enrichment the pollutants such as heavy metal of the easy diafiltration of high concentration, be regarded as danger wastes, for reducing the secondary pollution that flying ash causes environment, must carry out appropriate processing to it.

At present, the processing method of flying ash generally all is to adopt cement solidification.The concrete operations of cement solidification method: flying ash is packed in the storage tank, add cement and water simultaneously, flying ash, cement and water are stirred, make it solidify caking, carry out landfill then by double helix.

There is following defective in prior art: stir insufficient, the proportioning adjustability of flying dust, cement, water is whole poor, do not pass through shaping and drying and health, and chloride content is higher in the flying dust, a large amount of existence of villaumite have tangible interference effect to cement solidification, this technology is not to solidification effect not clearly, simultaneously, also there is negative effect in flying dust to aspects such as the sclerosis of cement, compression strength, this may be that particle size dispersion degree, inorganic salts (chloride, sulfide) and the alkaline matter content height of flying dust caused; In the flyash cement slurry, find a kind of material of similar sial vanadium, can cause the compression strength of firming body to reduce greatly, these problems will have influence on the stability of the long-term behaviour of flyash curing body, a huge sum of money that solidifies in the flying dust of back will leach again, influence environment, in addition, adopt cement solidification technology certainly will increase the volume of handling product greatly, cause the waste of final disposal field storage capacity.

Summary of the invention

At above-mentioned defective, the flyash curing system that the utility model provides, the intercalating agent and the water that utilize intercalating agent and water mixing and feeding apparatus to mix in proportion join in the flying dust mixing roll, and it is mixed with flying dust in the flying dust mixing roll, stir and moulding, finally form solid particle.

The flyash curing system that the utility model provides, comprise flying dust feed pipe (1), storage bin for flyash (2), constant feeder (3), screw(-type) feeder (4), flying dust mixing roll (5), health belt feeder (6), intercalating agent and water mixing and feeding apparatus (8) and air compression drying device (9), the outlet of described flying dust feed pipe (1) is connected with the import of described storage bin for flyash (2), the outlet of described storage bin for flyash (2) is connected with the import of described constant feeder (3), the outlet of described constant feeder (3) is connected with the import of described screw(-type) feeder (4), the outlet of described screw(-type) feeder (4) is connected with the charging aperture of described flying dust mixing roll (5), the discharging opening of described flying dust mixing roll (5) connects described health belt feeder (6), and the charging aperture of described mixing roll (5) also connects the delivery outlet of described intercalating agent and water mixing and feeding apparatus (8).

Preferably, also comprise the heating ventilating dust-arrester (7) that is connected with above-mentioned health belt feeder (6).

The concrete operation principle of the flyash curing system that the utility model provides is: the flying dust transport vehicle is transported in the storage bin for flyash by quick tieing and flying dust feed pipe, storage bin for flyash plays temporary transient storage flying dust, the outlet of storage bin for flyash is connected with the import of constant feeder, constant feeder exports continuously equably to the screw(-type) feeder feed by it, screw(-type) feeder is given by the rotation of spiral and is expected the flying dust mixing roll, the intercalating agent and the water that will mix in proportion by intercalating agent and water mixing and feeding apparatus also join in the flying dust mixing roll, the flying dust mixing roll is with intercalating agent, the mixture of water fully mixes with flying dust, stir, carry, moulding, material after the moulding is used for landfill to health belt feeder dry forming behind the dried solid particle.

In preferred version of the present utility model, rest the riempie machine and be connected with the heating ventilating dust-arrester, accelerated the drying of the material after the moulding, prevent the leakage of a small amount of flying dust simultaneously.

In sum, the flyash curing system that the utility model provides, by abundant mixing, stirring and extruding to flying dust, intercalating agent and water, heavy metal in the flying dust is fully captured, the stabilisation product that generates has formed than condensate fine and close more before handling, adhesion phenomenon has taken place between the fly ash granule, heavy metal in the energy flying dust steady in a long-term, reduce the activity of heavy metal in the flying ash greatly, the stabilisation product has long-term stability in sanitary filling field, reach consumer waste filling and embedding and pollute control criterion, can enter general sanitary filling field landfill.

Description of drawings

Fig. 1 is system's connection diagram of the utility model embodiment.

The specific embodiment

Fig. 1 is system's connection diagram of the utility model specific embodiment, below in conjunction with Fig. 1 the utility model embodiment is introduced.

As shown in Figure 1, the flyash curing system that the utility model embodiment provides, comprise flying dust feed pipe (1), storage bin for flyash (2), constant feeder (3), screw(-type) feeder (4), flying dust mixing roll (5), health belt feeder (6), intercalating agent and water mixing and feeding apparatus (8) and air compression drying device (9), the outlet of described flying dust feed pipe (1) is connected with the import of described storage bin for flyash (2), the outlet of described storage bin for flyash (2) is connected with the import of described constant feeder (3), the outlet of described constant feeder (3) is connected with the import of described screw(-type) feeder (4), the outlet of described screw(-type) feeder (4) is connected with the charging aperture of described flying dust mixing roll (5), the discharging opening of described flying dust mixing roll (5) connects described health belt feeder (6), the charging aperture of described mixing roll (5) also connects the delivery outlet of described intercalating agent and water mixing and feeding apparatus (8), also comprises the heating ventilating dust-arrester (7) that is connected with above-mentioned health belt feeder (6).

The flying dust transport vehicle is transported in the storage bin for flyash by quick tieing and flying dust feed pipe, storage bin for flyash plays temporary transient storage flying dust, the outlet of storage bin for flyash is connected with the import of constant feeder, constant feeder exports continuously equably to the screw(-type) feeder feed by it, screw(-type) feeder is given by the rotation of spiral and is expected the flying dust mixing roll, the intercalating agent and the water that will mix in proportion by intercalating agent and water mixing and feeding apparatus also join in the flying dust mixing roll, the flying dust mixing roll is with intercalating agent, the mixture of water fully mixes with flying dust, stir, carry, moulding, material after the moulding is to health belt feeder dry forming, be used for landfill behind the dried solid particle, the health belt feeder is connected with the heating ventilating dust-arrester, accelerate the drying of the material after the moulding, prevented the leakage of a small amount of flying dust simultaneously.

Claims

1, a kind of flyash curing system, it is characterized in that, comprise flying dust feed pipe (1), storage bin for flyash (2), constant feeder (3), screw(-type) feeder (4), flying dust mixing roll (5), health belt feeder (6), intercalating agent and water mixing and feeding apparatus (8) and air compression drying device (9), the outlet of described flying dust feed pipe (1) is connected with the import of described storage bin for flyash (2), the outlet of described storage bin for flyash (2) is connected with the import of described constant feeder (3), the outlet of described constant feeder (3) is connected with the import of described screw(-type) feeder (4), the outlet of described screw(-type) feeder (4) is connected with the charging aperture of described flying dust mixing roll (5), the discharging opening of described flying dust mixing roll (5) connects described health belt feeder (6), and the charging aperture of described mixing roll (5) also connects the delivery outlet of described intercalating agent and water mixing and feeding apparatus (8).

2, flyash curing system according to claim 1 is characterized in that, also comprises the heating ventilating dust-arrester (7) that is connected with above-mentioned health belt feeder (6).