CN210125264U - Waste incineration flue gas dust removal device - Google Patents

Abstract

The utility model discloses a msw incineration flue gas dust collector, including cyclone and sack cleaner, cyclone's gas outlet passes through the gas inlet intercommunication of pipeline with the sack cleaner, and cyclone includes casing, one-level whirl subassembly, second grade whirl subassembly, rectifier grid subassembly and unloading valve, and one-level whirl subassembly, second grade whirl subassembly, rectifier grid subassembly set gradually in the casing, and the unloading valve sets up the dust export at cyclone, and the rectifier assembly setting is inboard in the gas outlet. The utility model discloses increase a cyclone before the sack cleaner, get rid of large granule dust and adhesion particulate matter through cyclone in the flue gas, get rid of the 60% ~ 80% large granule dust of dust volume, make the dust removal volume of rear end sack cleaner reduce 70%, filter bag life improves more than 5 times, reduces running cost and reaches 60%. Therefore, the shutdown frequency of the bag-type dust collector is reduced, the replacement of the filter bag is reduced, and convenience is provided for the daily maintenance of enterprises.

Description

Waste incineration flue gas dust removal device

Technical Field

The utility model belongs to the technical field of exhaust-gas treatment's environmental protection, especially, relate to a waste incineration flue gas dust collector.

Background

The waste incineration treatment can obviously reduce the waste with larger volume originally, the weight of the waste can also be changed greatly, great convenience is brought to the waste treatment, the waste incineration at high temperature can release heat energy in the waste incineration treatment process, and the heat energy can be converted into steam and then used in a power generation project and a heat supply project. In a word, the municipal waste incineration treatment is the main mode of domestic waste treatment at present.

The smoke generated in the incineration process of the household garbage contains a large amount of pollutants, such as HC1, SOx, NOCO, heavy metals (Pb, Hg) and dioxin, and the harmful substances can cause secondary pollution to the environment if not well treated. In order to avoid the harmful substances from entering the living environment of human beings, the smoke must be subjected to deep purification treatment and discharged after reaching the standard. At present, the emission standard of waste incineration smoke is more and more strict, so that the key point for solving the problem is to find an efficient smoke treatment process.

The utility model discloses mainly be to the dust removal mode innovation in the gas cleaning handles, further reach and reduce dust emission, the purpose of purifying flue gas.

The characteristics of waste flue gas from waste incineration: smoke dust in the waste smoke components mainly is particulate matters and light impurities generated during combustion, part of smoke dust generated at high temperature has adhesiveness, and part of dry particulate matters and impurities do not have adhesiveness; the acid medium (hydrogen chloride) is active in chemical property, has strong corrosivity and can be stronger in high-temperature environment; VOCs are volatile and associated with an irritating odor.

The existing waste incineration flue gas treatment process comprises 2 types: a, adopting a semidry method (lime slurry sprayed by a rotary atomizer), activated carbon and a bag-type dust remover; b, dry method (lime dry powder), active carbon and bag-type dust remover.

In the prior art, as shown in fig. 1, garbage is combusted in a garbage incinerator 1, then flue gas and generated dust enter a deacidification tower 2 to remove acidic substances such as HC1, SOx, NOCO and the like generated by combustion, then flue gas mixed gas enters a bag-type dust remover 3 to remove dust, and finally other parts capable of utilizing heat removal are diffused into the atmosphere through a diffusing chimney 4. The bag-type dust collector system requires that the flue gas is dry, and the adhesion particulate matters in the flue dust are not suitable for direct filtration, are difficult to clean after being adhered to the filter bag, and the adhesion particulate matters in the flue dust block the gaps of the filter bag, thereby reducing the flow area, influencing the filter effect of the filter bag, improving the replacement period of the filter bag, and simultaneously improving the operation cost of the dust collection system.

Disclosure of Invention

At present, the waste incineration flue gas purification and dust removal process has the defects that the content of adhesive particles and large-particle dust in the incinerated flue dust is high, a filter bag is easily blocked, the shutdown of the cloth bag is caused, the filter bag replacement frequency is too high, and the system operation cost is increased. The utility model provides a novel waste incineration flue gas remove dust device can reduce the filter bag and change.

The utility model provides a technical scheme does: the utility model provides a msw incineration flue gas dust collector, includes cyclone and sack cleaner, and cyclone's gas outlet passes through the gas inlet intercommunication of pipeline with the sack cleaner, and cyclone includes casing, one-level whirl subassembly, second grade whirl subassembly, flow straightener subassembly and unloading valve, and one-level whirl subassembly, second grade whirl subassembly, flow straightener subassembly set gradually in the casing, and the unloading valve setting is in cyclone's dust outlet, and the flow straightener subassembly setting is inboard at gas outlet.

The casing includes horizontal segment and vertical section, and the horizontal segment is connected with vertical section and is communicated with each other, and one-level whirl subassembly sets up in the horizontal segment, and second grade whirl subassembly sets up in vertical section, and gas outlet sets up in vertical section side, is located second grade whirl subassembly's below.

The vertical section of the shell is arranged below the gas outlet and is provided with a cone, and the ash discharge valve is arranged at the lower end of the cone.

The flow straightener assembly is a sieve plate.

The horizontal section and the vertical section of the shell are integrally formed.

The dust removal device for the waste incineration flue gas further comprises an acid removal tower, and a gas outlet of the acid removal tower is communicated with a gas inlet of the cyclone dust collector.

The waste incineration flue gas dust removal device also comprises a diffusing chimney, and the diffusing chimney is communicated with a gas outlet of the bag-type dust remover.

To adhesion particulate matter jam filter bag in the smoke and dust among the present waste incineration flue gas purification dust removal technology, the filter bag is changed the frequency too high, the problem that the running cost is high, the utility model discloses increase a cyclone before the sack cleaner, get rid of large granule dust and adhesion particulate matter through cyclone in the flue gas, get rid of the 60% ~ 80% large granule dust of dust volume, make the dust removal volume of rear end sack cleaner reduce 70%, filter bag life improves more than 5 times, reduces the running cost and reaches 60%. Therefore, the shutdown frequency of the bag-type dust collector is reduced, the filter bag replacement is reduced, convenience is brought to the daily maintenance of an enterprise, the overhaul time is saved for the enterprise, the effective operation time of the enterprise is prolonged, the production loss brought to the enterprise due to overhaul is reduced, and the economic benefit is increased.

Cyclone adopts second grade cyclone, adopts one-level fairing, guarantees to burn the whole eradications of large granule dust in the flue gas, and the whirlwind air current that cyclone caused passes through one-level fairing, combs the turbulent flow into the laminar flow and gets into and burn the flue gas pipeline, guarantees that the air current steadily gets into sack dust pelletizing system, accomplishes the dust removal engineering of reforming and changing and burning the flue gas.

Drawings

FIG. 1 is a schematic structural diagram of a conventional dust removal device for waste incineration flue gas.

Fig. 2 is the structure schematic diagram of the waste incineration flue gas dust removal device of the utility model.

Fig. 3 is a schematic structural view of the cyclone dust collector of the present invention.

Fig. 4 is a schematic structural diagram of the rectifying grid assembly of the present invention.

1-a garbage incinerator, 2-a deacidification tower, 3-a bag-type dust remover, 4-a diffusing chimney, 5-a cyclone dust remover, 51-a shell, 52-a primary cyclone component, 53-a secondary cyclone component, 54-a flow adjusting grid component, 55-an ash discharging valve, 56-a gas inlet, 57-a gas outlet, 58-a transverse section and 59-a vertical section.

Detailed Description

The structure and features of the present invention will be described in detail below with reference to the accompanying drawings and examples.

Because the content of adhesive particles and large-particle dust in the smoke dust after the garbage incineration is high, the filter bag is easy to block, the cloth bag stops working, the filter bag replacement frequency is too high, and the system operation cost is increased. So to this kind of condition, the utility model discloses msw incineration flue gas dust collector includes cyclone 5 and sack cleaner 3, and the gas outlet 57 of cyclone 5 passes through the pipeline and communicates with the gas inlet of sack cleaner 3, and the gas outlet of sack cleaner 3 is connected with diffusing chimney 4, and the gas outlet of deacidification tower 2 is connected with cyclone 5's gas inlet 56, as shown in fig. 2.

As shown in fig. 3, the cyclone dust collector includes a housing 51, a first-stage cyclone assembly 52, a second-stage cyclone assembly 53, a flow-straightening grate assembly 54 and an ash discharge valve 55, wherein the first-stage cyclone assembly 52, the second-stage cyclone assembly 53 and the flow-straightening grate assembly 54 are sequentially arranged in the housing 51, the ash discharge valve 55 is arranged at a dust outlet of the cyclone dust collector 5, and the flow-straightening assembly 54 is arranged inside a gas outlet 57.

The shell 51 comprises a transverse section 58 and a vertical section 59, the transverse section 58 is communicated with the vertical section 59 to form a 7-shaped structure, the first-stage cyclone assembly 52 is arranged in the transverse section 58, the second-stage cyclone assembly 53 is arranged in the vertical section 59, and the gas outlet 57 is arranged on the side surface of the vertical section 59 and is positioned below the second-stage cyclone assembly 53. The gas inlet 56 of the cyclone 5 is located in the cross section 58. The horizontal section 58 and the vertical section 59 of the housing 51 are integrally formed.

The vertical section 59 of the housing 51 below the gas outlet is provided as a cone, and the ash discharge valve 55 is provided at the lower end of the cone. The lower part of the vertical section 59 is arranged to be conical, so that dust collection is facilitated.

As shown in fig. 4, the flow straightener assembly 54 is a screen plate.

The internal structure of primary cyclone assembly 52 and secondary cyclone assembly 53 is prior art. The first-stage cyclone assembly 52 and the second-stage cyclone assembly 53 are arranged on the inner wall of the shell in a welding mode and the like.

The utility model discloses a msw incineration flue gas dust collector is shown in fig. 2, rubbish back of burning in waste incinerator 1, and the dust that flue gas and production get into deacidification tower 2 and detach the acidic material such as HC1, SOx, NOCO that the burning produced after, get into cyclone 5 through the pipeline from 2 upper portion gas outlets of deacidification tower and get rid of large granule dust and adhesion particulate matter, then get into after the gas outlet 57 of lower part gets into sack cleaner 3 removes dust and get into and diffuse chimney 4 and get rid of.

Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. The utility model provides a waste incineration flue gas dust collector which characterized in that: including cyclone and sack cleaner, cyclone's gas outlet passes through the gas inlet intercommunication of pipeline and sack cleaner, and cyclone includes casing, one-level whirl subassembly, second grade whirl subassembly, flow straightener subassembly and unloading valve, and one-level whirl subassembly, second grade whirl subassembly, flow straightener subassembly set gradually in the casing, and the unloading valve setting is in cyclone's dust outlet, and the flow straightener subassembly setting is inboard at the gas outlet.

2. The dust removing device for the flue gas generated by the incineration of garbage according to claim 1, wherein: the casing includes horizontal segment and vertical section, and the horizontal segment is connected with vertical section and is communicated with each other, and one-level whirl subassembly sets up in the horizontal segment, and second grade whirl subassembly sets up in vertical section, and gas outlet sets up in vertical section side, is located second grade whirl subassembly's below.

3. The dust removing device for the flue gas generated by the incineration of garbage according to claim 2, wherein: the vertical section of the shell is arranged below the gas outlet and is provided with a cone, and the ash discharge valve is arranged at the lower end of the cone.

4. The dust removing device for the flue gas generated by the incineration of garbage according to claim 1, wherein: the flow straightener assembly is a sieve plate.

5. The dust removing device for the flue gas generated by the incineration of garbage according to claim 1, wherein: the dust removal device for the waste incineration flue gas further comprises an acid removal tower, and a gas outlet of the acid removal tower is communicated with a gas inlet of the cyclone dust collector.

6. The dust removing device for the flue gas generated by the incineration of garbage according to claim 1, wherein: the waste incineration flue gas dust removal device comprises a diffusing chimney, and the diffusing chimney is communicated with a gas outlet of the bag-type dust remover.

7. The dust removing device for the flue gas generated by the incineration of garbage according to claim 2, wherein: the horizontal section and the vertical section of the shell are integrally formed.

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