CN102410742A

CN102410742A - Kiln waste heat utilization system with a dust and fume separation device

Info

Publication number: CN102410742A
Application number: CN2011103627571A
Authority: CN
Inventors: 张秋玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-14
Filing date: 2011-11-14
Publication date: 2012-04-11

Abstract

The invention provides a kiln waste heat utilization system with a dust and fume separation device. In the kiln waste heat utilization system, a dust and fume separation device and a waste heat boiler device are additionally arranged at the tail part of a kiln and are connected through a chimney pipeline; the dust and fume separation device comprises a high-pressure insulative element, a stand pipe, an electric corona quad arranged in the stand pipe, an electric corona quad fixing member and a dust and fume collecting bucket; a waste heat boiler exchanges heat with kiln smoke by means of an evaporator constituted by helical finned tubes, and water in the boiler is heated to generate a certain amount of steam to be supplied to a user for use; and the smoke subjected to heat exchanging and cooling is exhausted by a draught fan and is discharged out of a chimney. The kiln waste heat utilization system with the dust and fume separation device, provided by the invention, can be used for fully utilizing a heat source of the high-temperature kiln smoke to generate the steam capable of being supplied to the user for use, so that energy wastes are reduced; meanwhile, the pollution of the dust and fume in the discharged smoke to the environment is avoided, and the new industrial structure for energy saving and emission reduction, which is vigorously popularized in China, are in accordance with.

Description

A kind of using residual heat from kiln furnace with dust separating device utilizes system

Technical field

The present invention relates to the calcining kiln technical field, particularly a kind of using residual heat from kiln furnace with dust separating device utilizes system.

Background technology

Kiln is the equipment in order to calcining materials or burnt product that is built into refractory material, and at China's occurred very early burning paper as sacrificial offerings various kilns of pottery, stock need carry out in stove that high-temperature calcination is could sintering capable to become required device.Can be divided into kilns such as brickkiln, porcelain kiln, pottery kiln, cement kiln according to the different kilns of calcining materials kind.Because the firing temperature of kiln inside is very high; High-temperature residual heat flue gas after the tradition kiln is fired is directly to discharge chimney; Can cause wasting of a large amount of thermals source like this, and owing to contain volume of smoke in the kiln discharged flue gas, directly the discharging meeting causes bigger pollution to environment.

Summary of the invention

Problems such as the waste of the thermal source that direct discharging causes to the high-temperature residual heat flue gas of traditional kiln and environmental pollution; The present invention proposes a kind of bootstrap system with dust separating device; It is afterbody increase dust separating device and waste heat boiler device at the general industry kiln; Absorb the flue dust in the flue gas and reclaim used heat a large amount of in the high-temperature flue gas, produce a certain amount of steam and supply the user to use, the waste heat flue gas behind the desuperheat enters chimney through air-introduced machine and finally discharges atmosphere; Realize the saving of the energy, meet the energy-saving and emission-reduction requirement that country advocates.

For reaching the object of the invention; Concrete; Dust separating device and waste heat boiler device that the afterbody that using residual heat from kiln furnace with dust separating device of the present invention utilizes system to be included in kiln connects; Both link to each other by the flue pipeline, and said dust separating device comprises High-Voltage Insulation element, standpipe and is arranged at its inner corona wire group, corona wire group fixture and flue dust collecting bucket; Said waste heat boiler has the evaporimeter that spiral fin coil constitutes, and carries out heat exchange by evaporimeter and kiln gas, the water in the boiler is heated produce a certain amount of steam confession user use; Discharge by chimney by the air-introduced machine extraction through the flue gas after the heat exchange cooling.

During work, the flue gas that comes out from kiln at first gets into dust separating device through the gas approach of dust separating device, through its inner high-pressure electrostatic precipitation electric field that forms the flue dust in the flue gas is separated, and the flue dust after the separation is assembled in the flue dust collecting bucket; Flue gas through dedusting is discharged by outlet, gets into the flue entrance of waste heat boiler, in bootstrap system, carries out discharging after the heat exchange, and the steam output that produces in the preboiler supplies the user to use.

Preferably; Bootstrap system of the present invention; Can be by the shared waste heat boiler of a plurality of kilns, continuous flue arranged and through the control of flue butterfly valve between each kiln and the waste heat boiler, even during indivedual kiln blowing out; The waste heat flue gas of other kilns still produces a certain amount of steam through waste heat boiler, realizes the uninterrupted bootstrap system of whole kiln.

Using residual heat from kiln furnace with dust separating device of the present invention utilizes system; The thermal source that can make full use of the high temperature kiln flue gas produces the steam that can supply the user to use; Reduced the waste of the energy; Reduced simultaneously and contained flue dust in the flue gas, reduced environmental pollution, met the new industrial structure of the energy-saving and emission-reduction that country widelys popularize.

Description of drawings

Through the detailed description below in conjunction with accompanying drawing, aforesaid purpose, the feature and advantage with other of the present invention will become obvious.Wherein:

The composition structural representation that utilizes system for the using residual heat from kiln furnace with dust separating device of one embodiment of the invention shown in Figure 1;

The composition structural representation that utilizes system for the using residual heat from kiln furnace with dust separating device of another embodiment of the present invention shown in Figure 2;

Shown in Figure 3 is the structural representation of the dust separating device of bootstrap system of the present invention.

The specific embodiment

Utilize the composition structural representation of system in conjunction with the using residual heat from kiln furnace with dust separating device of the present invention shown in Figure 1; The using residual heat from kiln furnace with dust separating device of one embodiment of the invention utilizes system to comprise to be installed in the dust separating device 4 and waste heat boiler device of kiln afterbody; Both connect through the flue gas flue; The waste heat boiler device comprises waste heat boiler 2 and the evaporimeter 22 that is arranged on its bottom; After the high temperature kiln flue gas comes out from kiln; Under the effect of air-introduced machine 3, at first carry out flue dust through dust separating device 4 and separate, waste heat boiler 2 carries out heat exchange through evaporimeter 22 and kiln gas, the water in the boiler is added thermosetting steam supply the user to use; Flue gas through after the heat exchange is drawn to smoke stack emission by air-introduced machine 3.Be provided with the entering of flue butterfly valve 1 control flue gas at waste heat boiler flue entrance A place, when kiln is not worked cooling, flue is closed through flue butterfly valve 1.Described evaporimeter is selected Influences of Structure of Spiral Finned Tube for use, and this structure is a kind of extended surface, under the heating surface area situation that equates, reduces about 30% steel than the light pipe heating surface of ordinary construction.Steel adopt rectangular tube to replace traditional Two bors d's oeuveres channel-section steel, and the welding job amount of having practiced thrift workshop channel-section steel Two bors d's oeuveres weld seam reduces cost of labor.Under the condition of the moment of inertia on the identical cross-section and module of anti-bending section, rectangular tube reduces about 10% steel than Two bors d's oeuveres channel-section steel.

The composition structural representation that utilizes system for the using residual heat from kiln furnace of another embodiment of the present invention shown in Figure 2.Shown in figure, the shared waste heat boiler of several kilns, the waste heat flue gas that comes out from kiln gets into the waste heat boiler evaporating heating surface after getting into the dust separating device dedusting behind the flue separately, and the cooling back is extracted out by air-introduced machine and is discharged chimney; Waste heat boiler absorbs the steam confession user use that produces certain mass behind the high-temperature flue gas heat.Each flue like this, when some kiln is not worked in a plurality of kilns, through flue butterfly valve 1 this floss hole is sealed, and the flue gas of other kilns normally carries out discharging after the heat exchange through the entering of flue butterfly valve 1 control flue gas.

Utilize the structural representation of the dust separating device of system again referring to waste heat system shown in Figure 3; It comprises high-temperature insulation element 40; Standpipe 42 be arranged at its inner corona wire group 41, corona wire group 41 is fixed through fixed structure 45 and device case, the inwall of standpipe 42 is as the control of dust pole plate of high-pressure electrostatic precipitation electric field.During work; The flue gas that the kiln burning produces gets into dust separating device 4 from chimney intake 101 under the effect of air-introduced machine 3; The high voltage electric field that corona wire group 41 produces is with air ionization; The dust granules electric charge moves and finally accumulates on the tube wall pole plate of standpipe 42 at round about electrode under the effect of electric field force, through vibration or beating mode the dust of assembling is recovered in the flue dust collecting bucket 48.Flue gas after the dedusting from top outlet A ' the flue entrance A that gets into waste heat boiler carry out the heat exchange with the evaporimeter of waste heat boiler.When the shared waste heat boiler of a plurality of kilns, a dust separating device can be set respectively at the afterbody of each kiln, also can be the shared dust separating devices of all kilns.Carry out the evaporimeter heat exchange with waste heat boiler after utilizing dust separating device that the particle flue dust in the flue gas is reclaimed again, except reducing smoke contamination, also can avoid soot dust granule attached to the efficient that influences heat exchange on the finned-tube evaporator.

Kiln gas bootstrap system with dust separating device of the present invention; Can combine single or a plurality of kilns to use; Effectively the kiln gas heat is utilized again, practiced thrift the consumption of the energy, responded the requirement of the industry restructuring of national energy-saving and emission-reduction.

The present invention is not limited to described embodiment, and those skilled in the art still can do some corrections or change, so rights protection scope of the present invention is as the criterion with claims restricted portion not breaking away from spirit of the present invention promptly openly in the scope.

Claims

1. the using residual heat from kiln furnace with dust separating device utilizes system; It is characterized in that; Dust separating device and waste heat boiler device that its afterbody that is included in kiln connects; Both link to each other through the flue pipeline, and said dust separating device comprises High-Voltage Insulation element, standpipe and is arranged at its inner corona wire group, corona wire group fixture and flue dust collecting bucket; The bottom of said waste heat boiler is provided with the evaporimeter that spiral fin coil constitutes, and carries out heat exchange through the kiln gas after evaporimeter and the dedusting, the water in the boiler is heated produce a certain amount of steam confession user use; Extract out through the chimney discharge by air-introduced machine through the flue gas after the heat exchange cooling.

2. the using residual heat from kiln furnace with dust separating device as claimed in claim 1 utilizes system; It is characterized in that; Said bootstrap system can link to each other with single or a plurality of kilns, continuous flue is arranged between each kiln and the waste heat boiler and the flue butterfly valve is set in flue to open and close with the flue of controlling each kiln.

3. the using residual heat from kiln furnace with dust separating device as claimed in claim 1 utilizes system; It is characterized in that; The process that said bootstrap system carries out the high-temperature flue gas UTILIZATION OF VESIDUAL HEAT IN does; The flue gas that the kiln burning produces gas approach from dust separating device under the effect of air-introduced machine gets into dust separating device, under the high-pressure electrostatic precipitation electric field action of dust separating device, carries out flue dust and separates; Flue gas after the dedusting gets into the smoke inlet of waste heat boiler from the outlet of dust separating device then, carries out heat exchange with the evaporimeter of waste heat boiler; Flue gas after the heat exchange is discharged through chimney under the effect of air-introduced machine.