CN217431221U - Water dust removal device for active lime digestion - Google Patents

Abstract

The utility model relates to a water dust collector of active lime digestion, including the dust cage that connects gradually, first dust removal tobacco pipe, second induced duct and the pipe of discharging fume, its characterized in that: a water dust removal device is arranged between the first dust removal smoke pipe and the second induced draft pipe, the water dust removal device comprises an inner smoke cover and an outer smoke cover, the inner smoke cover is arranged in the outer smoke cover, an annular space formed between the lower edge plane of the inner smoke cover and the lower edge plane of the outer smoke cover is used as a filtering water pool, a plurality of exhaust holes are symmetrically formed in the lower edge plane of the inner smoke cover, exhaust pipes are arranged on the exhaust holes, the air inlet ends of the exhaust pipes are arranged in the inner smoke cover, and the air outlet ends of the exhaust pipes extend into the water level lower limit of the filtering water pool so as to form a water seal; and a replenishing water pipe is arranged on the side wall of the outer smoke hood and above the water level of the filter water tank. The advantages are that: after the dust generated by slaking the active lime is removed by the water dust removing device, the dust pollution problem is effectively eliminated, the surrounding environment is improved, and the environmental pollution is reduced.

Description

Water dust removal device for active lime digestion

technical field

The utility model belongs to the technical field of solid-liquid separation and dehydration, in particular to a water dedusting device for active lime digestion.

Background technique

In the production process of sintering, active lime (CaO) needs to be added. After adding water, a digestion reaction occurs to generate slaked lime (Ca(OH) ₂ ). The mixture is spherical. However, during the digestion process of activated lime, a large amount of water vapor will be generated, and the steam will carry a large amount of dust and be discharged into the surrounding environment when it is discharged, causing pollution to the environment. The problem of dust pollution caused by the digestion of quicklime has not been solved well at home and abroad for many years.

In the past, water vapor and dust were discharged into the air through the chimney. Because the dust contained a large amount of slaked lime (Ca(OH) ₂ ), after discharge, it not only seriously polluted the surrounding environment, but also caused harm to the staff. Because slaked lime (Ca(OH) ₂ ) has the characteristics of high viscosity, it is easy to bond in the dust removal pipeline and the dust collector body, blocking the pipeline and the dust collector body, resulting in a decrease in the operation efficiency of the dust collector or even failure.

The dust digestion device currently used is by setting a water pipe in the exhaust pipe, and opening a number of water nozzles on the water pipe; or setting up a number of shower nozzles in the pipe, and using the adsorption dust of the sprayed water to achieve the effect of dust removal. However, the disadvantage of this scheme is that water droplets or water columns with larger diameters are often formed after the water is sprayed out. As a result, the dust removal effect is not ideal, and the water consumption is also large.

SUMMARY OF THE INVENTION

The purpose of this utility model is to solve the above problems, and to provide a water dust removal device for active lime digestion which has better dust removal effect and saves water at the same time.

The utility model is realized through the following technical solutions:

The utility model is a water dust removal device for active lime digestion, which comprises a dust collecting hood, a first dust removal smoke pipe, a second air induction pipe with a fan, and a smoke exhaust pipe, which are connected in sequence, and is characterized in that: in the first dust removal A water dust removal device is arranged between the smoke pipe and the second air induction pipe. The water dust removal device includes an inner smoke hood and an outer smoke hood. The inner smoke hood is a closed smoke hood with an air inlet at the lower part. The hood is a fume hood with a connecting through hole in the lower part and an air outlet in the upper part. On the outer wall of a dust-removing smoke pipe, the upper air outlet is communicated with the second air-inducing pipe,

The inner fume hood is arranged in the outer fume hood, and the air inlet of the inner fume hood is fixedly connected to the outer wall of the first dust-removing fume pipe, so that the lower edge plane of the inner fume hood and the lower edge plane of the outer fume hood are between The annular space formed is used as a filter water pool for containing filtered water. Several exhaust holes are symmetrically opened on the lower edge plane of the inner fume hood, and an exhaust pipe is arranged on the exhaust hole. The inlet end of the pipe is placed in the inner fume hood, and the outlet end of the exhaust pipe extends below the water level of the filter pool to form a water seal;

On the side wall of the outer fume hood, a supplementary water pipe is arranged above the water level of the circulating water pool.

Preferably, a dust collecting ring is also provided on the inner wall of the first dust removal smoke pipe, and heat-resistant rubber is provided on the inner wall of the first dust removal smoke pipe and the dust collection ring.

Preferably, on the first dust removal smoke pipe, an overflow pipe is arranged at the lower part of the lower edge plane of the inner smoke cover, and the overflow pipe is arranged higher than the air outlet of the exhaust pipe.

Preferably, a sewage outlet is opened on the lower edge plane of the outer fume hood.

The advantages of the present utility model are:

Compared with the prior art, the large amount of dust generated in the active lime digestion and digestion process of the utility model is dedusted by the water dedusting device, which effectively eliminates the problem of dust pollution and improves the surrounding environment; at the same time, the hot slurry generated from the overflow pipe , it is directly sent back to the quicklime digester through the overflow pipe for digesting quicklime, and there is no waste water discharged from the whole system, which further reduces the environmental pollution.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, a water dust removal device for active lime digestion of the present invention includes a dust collecting hood 3 connected in sequence, a first dust removal smoke pipe 7, a second air induction pipe 10 with a fan 11 and a smoke exhaust The pipe 12 is characterized in that a water dust removal device is arranged between the first dust removal smoke pipe 7 and the second air induction pipe 10, and the water dust removal device includes an inner smoke hood 6 and an outer smoke hood 5. The fume hood 6 is a closed fume hood with an air inlet in the lower part, and the outer fume hood 5 is a fume hood with a connecting through hole in the lower part and an air outlet in the upper part. The lower edge plane 51 of the outer fume hood passes through the fixing bracket 4 It is fixed on the upper part of the dust collecting hood 3, the connecting through hole of the outer fume hood is connected to the outer wall of the first dust removal smoke pipe 7, and the air outlet on the upper part is communicated with the second air induction pipe 10;

The inner fume hood 6 is arranged in the outer fume hood 5, and the air inlet of the inner fume hood is fixedly connected to the outer wall of the first dust-removing fume pipe 7, so that the lower edge plane 61 of the inner fume hood is connected to the lower surface of the outer fume hood. The annular space formed between the edge planes 61 is used as a filter water pool for containing filtered water 9. A number of exhaust holes are opened on the lower edge plane 61 of the inner fume hood, and an exhaust pipe is arranged on the exhaust hole. 8. The air inlet end of the exhaust pipe 8 is placed in the inner fume hood 5, and the air outlet end of the exhaust pipe 8 extends below the water level of the filter pool to form a water seal;

On the side wall of the outer fume hood 5, a supplementary water pipe 13 is provided at a position above the water level of the filtering pool.

In the present invention, a rapping device 71 is arranged at the lower part of the outer side of the first dust-removing smoke pipe 7, and a dust-collecting ring 72 is also arranged on the inner wall of the first dust-removing smoke pipe. Heat-resistant rubber 73 is provided on the inner wall of 7 and the dust collecting ring 72 . The slaked lime (Ca(OH) ₂ ) hung on the first dust-removing smoke pipe 7 and the dust-collecting ring 5 is periodically knocked down to the mixture 2 .

The working principle of this new model is:

During the sintering and batching process, the upper part of the belt 1 is mixed with a mixture 2 containing active lime (CaO). After adding water, the active lime (CaO) produces a digestion reaction and generates a large amount of steam. The steam passes through the gas collecting hood 3 and enters the first dust removal smoke pipe 7. When the steam rises in the first dust removal smoke pipe 7, part of the slaked lime (Ca(OH) ₂ ) hangs on the dust collecting ring 72; then the steam enters the filter pool through the exhaust pipe 8, and in the filtered water 9, the Activated lime (CaO) and slaked lime (Ca(OH) ₂ ) are precipitated in the filter tank, and the dedusted steam will surface under the action of the fan 11, and then be discharged into the second air induction pipe 10 and the smoke exhaust pipe 12. into the air.

In the utility model, an overflow pipe 14 is arranged at the lower part of the lower edge plane 61 of the inner fume hood on the first dust removal smoke pipe 7 , and the overflow pipe 14 is arranged higher than the air outlet of the exhaust pipe 8 . The filter water tank is replenished with a small amount of water for a long time through the supplementary water pipe 13 to reduce the temperature and concentration of the water tank. At the same time, the overflow water passes through the overflow pipe 14, and the slurry containing slaked lime (Ca(OH) ₂ ) flows to the mixture 2 to improve the mixture. 2 material mild adhesion.

The utility model is provided with a sewage outlet on the plane of the lower edge of the outer hood. The dust and sludge on the lower edge plane of the outer fume hood can be cleaned regularly.

Claims (5)

1. a water dedusting device for active lime digestion, comprising a dust collecting hood connected in sequence, the first dust-removing smoke pipe, the second air-inducing pipe and the smoke-exhaust pipe with a fan, it is characterized in that: in the first dust-removing smoke pipe A water dedusting device is arranged between the second air duct and the water dedusting device. The water dedusting device includes an inner hood and an outer hood. The inner hood is a closed hood with an air inlet at the bottom, and the outer hood is The lower part is provided with a connecting through hole, and the upper part is provided with a fume hood with an air outlet. On the outer wall of the smoke pipe, the upper air outlet is communicated with the second air induction pipe, The inner fume hood is arranged in the outer fume hood, and the air inlet of the inner fume hood is fixedly connected to the outer wall of the first dust-removing fume pipe, so that the lower edge plane of the inner fume hood and the lower edge plane of the outer fume hood are between The annular space formed is used as a filter water pool for containing filtered water. Several exhaust holes are symmetrically opened on the lower edge plane of the inner fume hood, and an exhaust pipe is arranged on the exhaust hole. The inlet end of the pipe is placed in the inner fume hood, and the outlet end of the exhaust pipe extends below the water level of the filter pool to form a water seal; On the side wall of the outer fume hood, a supplementary water pipe is arranged at the position above the water level of the filtering pool. 2 . The water dedusting device for active lime digestion according to claim 1 , characterized in that: a rapping device is provided at the lower part of the outer side of the first dedusting smoke pipe. 3 . 3. The water dedusting device for active lime digestion according to claim 1, characterized in that: a dust collecting ring is also provided on the inner wall of the first dedusting smoke pipe, and the inner wall of the first dedusting smoke pipe and The dust collecting ring is provided with heat-resistant rubber. 4. The water dedusting device for active lime digestion according to claim 1, characterized in that: on the first dedusting smoke pipe, an overflow pipe is arranged at the lower part of the lower edge plane of the inner smoke hood, and the The overflow pipe is set higher than the outlet of the exhaust pipe. 5 . The water dedusting device for active lime digestion according to claim 1 , wherein a sewage outlet is opened on the lower edge plane of the outer fume hood. 6 .

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