CN2102164U

CN2102164U - Screw heat-exchanging dust remover

Info

Publication number: CN2102164U
Application number: CN 91208735
Authority: CN
Inventors: 马国林
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-05-20
Filing date: 1991-05-20
Publication date: 1992-04-22

Abstract

The utility model discloses a spiral type heat-exchange dust remover, in particular to a device which has not only air preheating effect but also smoke prevention and dust control effect. A spiral type fume exhaust passage is rotated from the exterior to the inner. The upper end of a spiral core is communicated with a draught fan. The other wall of the fume exhaust passage is a spiral type air preheating passage, which is rotated from the exterior to the inner. The upper end of a spiral core is communicated with a blower. The outlet of the air preheating passage is communicated with the wind inlet of a combustion device. The different particle diameters of smoke particles are separated in the process of fume exhaust by the spiral type fume exhaust passage. Meanwhile, the wind which is transferred into the combustion equipment by the blower is preheated. The utility model has the advantages of energy resource saving and depollution.

Description

Screw heat-exchanging dust remover

The utility model relates to a kind of spiral device for abatement of smoke and dust with heat exchange effect.

In the existing technology, people take much count of smoke medicining dust-removing effect, because directly have influence on the utilization of the energy, also directly influence air pollution.Thereby various dust arresters are a lot.But on patent documentation record and actual the use, main type has polytypes such as electrostatic precipitation, bag-type dust, centrifugal force, inertia force.But not having all the time can gratifying effect.Because relevant with combustion apparatus, combustion apparatus is littler, the deduster size is little, but dust removing effects is very low.Combustion apparatus is big, and the deduster size is big, but operating cost height, initial cost height.That a lot of devices exist is easy to wear, resistance big, easily stifled grey.Be still a large amount of discharging flue dust.General exhaust gas temperature is all about 170-200 ℃.Some boiler erection below 10 tons at present economizer, try hard to improve efficiency of combustion, but the easily stifled ash of this device itself makes on the contrary the flue dust temperature of discharge improve, flue gas resistance increases, efficiency of combustion decline has played reaction.In the boiler more than 10 tons, air preheater has been installed and deduster joins.But its soot dust granule has aggravated the wearing and tearing of air preheater, influences normal service ability, makes maintenance cost strengthen.Thereby air preheater, economizer, dust arrester are all not really desirable at present.

The purpose of this utility model is that design a kind ofly has higher efficiency of dust collection, exhaust gas temperature is low, and can improve the device for eliminating smoke and dust of the efficiency of combustion of combustion apparatus.

Scheme of the present utility model is as follows: screw type fume emission passage ecto-entad revolves, and flue mouth and combustion apparatus exhaust opening communicate, and the outlet tool is that spiral shell core and air-introduced machine communicate, and another wall of spiral discharge flue is spiral cold media discharge passage simultaneously.Its spiral shell core can join with the import of air blast, and the air inlet of the port of export and combustion chamber communicates.Be that the wind that air blast enters combustion apparatus is through the hot blast after the spiral flue preheating, and after flue gas enters spiral flue, fall into flue-dust retainer by the deadweight of particle because the effect of screw type walling of flue is got rid of to outer wall soot dust granule under action of centrifugal force.Along with close to the spiral shell heart, radius is littler, and centrifugal force is bigger, and the particle that particle diameter is more little is separated gradually, therefore just form as the branch duster parallels of revolving of what being separated different-grain diameter, thereby efficiency of dust collection is very high.Simultaneously because the hot blast heat exchange area that spiral flue shape is come in air blast strengthens (by the outward turning of spiral shell mind-set), hot-air to combustion apparatus, further promotes sufficient combustion through fully preheating, so the utility model is an air preheater, be again device for eliminating smoke and dust.Exhaust gas temperature reduces, flue directly and ash bucket communicate, be difficult for obstruction, heating surface wear is reduced, and is corrosion-resistant.Thereby long service life.

Embodiment and description of drawings:

Fig. 1 is the side view of an embodiment of the utility model, and Fig. 2 is a transverse sectional view.

The cold medium import of 1-; 2-leads to the flue (spiral flue outlet) of air-introduced machine; The 3-spiral flue; The spiral hot-flow flue of 4-; 5-hot-flow flue outlet (communicating) with combustion apparatus; The 6-ash bucket; The import of 7-spiral flue.

The utility model spiral channel available metal is made.

Embodiment 2:

Screw type fume emission passage opposite side can be the circulation passage of cold WATER AS FLOW MEDIUM, and spiral shell core and feed pump join, and outlet and boiler join, and the energy has been saved in water preheating behind spiral circulation passage, also can be other cold medium.

Embodiment 3:

Can be coated with the anti-abrasive material of thickening in the import department of spiral fume emission passage, flue-gas temperature reduces section (the passage wall temperature is lower than sulfuric acid vapor dew point place) and takes anti-corrosion measure.

Embodiment 4:

In the porch of spiral discharge flue, spray into the lime adsorbent, or place adsorbents such as coke or charcoal can alleviate sulfide greatly as the adsorbent equipment of absorption sulfide discharge capacity in the outside of exhaust gases passes.

Claims

1, spiral heat-exchange dust remover, it is characterized in that the fume emission passage is that the screw type ecto-entad heart revolves, the upper end of the spiral shell heart and air-introduced machine air intake vent communicate, the most external flue mouth of spiral channel and the exhaust opening of combustion apparatus communicate, the lower end and the tobacco pipe of spiral discharge flue communicate, another wall of its spiral discharge flue is that spiral air preheat passage is by the outward turning of spiral shell mind-set, the upper end of the spiral shell heart can communicate with air blast, and the ragged edge exit of helical duct can communicate with the air inlet of combustion apparatus.

2, spiral heat-exchange dust remover according to claim 1, another wall that it is characterized in that above-mentioned spiral fume emission passage can be the circulation passage of screw type cold WATER AS FLOW MEDIUM, by spiral shell mind-set inner rotary, the spiral shell heart and feed pump join, and enter boiler after the helical duct circulation.