CN103673643B - High-temperature flue gas waste heat recovery and dust extraction all-in-one device - Google Patents
High-temperature flue gas waste heat recovery and dust extraction all-in-one device Download PDFInfo
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- CN103673643B CN103673643B CN201310597222.1A CN201310597222A CN103673643B CN 103673643 B CN103673643 B CN 103673643B CN 201310597222 A CN201310597222 A CN 201310597222A CN 103673643 B CN103673643 B CN 103673643B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention relates to a high-temperature flue gas waste heat recovery and dust extraction all-in-one device. The high-temperature flue gas waste heat recovery and dust extraction all-in-one device comprises furnace connectors, material filtering beds, a left wind passing unit, a right wind passing unit and a four-way reversing valve, wherein the furnace connectors and the material filtering beds are connected with air flues on the two sides of a high-temperature kiln. Each wind passing unit comprises an upper wind opening, the corresponding low-temperature area material filtering bed, a low-temperature area frame, the corresponding high-temperature area material filtering bed, a high-temperature area frame, the corresponding furnace connector, a dust collection box and an ash outlet with movable partition plates from top to bottom. Each material filtering bed comprises accumulated ceramic balls. The high-temperature flue gas waste heat recovery and dust extraction all-in-one device allows filtration and ash removing to be conducted in a mode that the leftward direction and the rightward direction are switched in a timed mode and filtration and ash removing are periodically and alternately conducted, and allows ash removing and heat absorption to be achieved in a mode that high-temperature flue gas from one side passes through the corresponding material filtering beds from bottom to top so that filtration and heat accumulation can be achieved, and air from the other side reversely blows the corresponding material filtering beds from top to bottom so that ash removing and heat absorption can be achieved. The ash-laden gas flue can be unceasingly filtered, waste heat in the high-temperature gas flue can be unceasingly recovered, meanwhile, function regeneration and fresh air preheating can be simultaneously conducted, cooling and dirt removing of the high-temperature flue gas are achieved, and combustion efficiency is improved.
Description
Technical field
The present invention relates to the corollary equipment of industrial furnace, more particularly, the invention particularly relates to and a kind ofly clean the corollary equipment with recovery waste heat for industrial furnace.
Background technology
Current industrial circle, stove is widely adopted and reaches certain production object with combustion of fossil fuel generation heat energy, gives off flue gas after industrial furnace fuel combustion, and flue gas is the heterogeneous aerosol of solid, liquids and gases material composition, and Main Ingredients and Appearance is CO
2, H
2o, CO, NO and flue dust, wherein flue dust belongs to particle contamination, and particle contamination is one of important pollutant of air, and atmosphere pollution has day by day seriously directly jeopardized the comfortable, healthy of human body, and even the environment that the mankind depend on for existence, the oxious component in flue gas needs to reduce discharge by improvement burning and dedusting.
Traditional industrial furnace flue gas ash removal, mainly adopts dust removal with machine, electrostatic precipitation, filtering type bag-type dust, washing type wet dedusting etc.Because high-temperature flue gas has very vigorous erosion destructive power to the equipment of traditional deduster, filtering material, also can produce the impact of thermal expansion to deduster structure, and the Applicable temperature of traditional deduster is low, therefore, high-temperature dust removal effect is bad, generally effectively can only work between 50-200 DEG C.
Temperature is reached to the dedusting of 200 DEG C-1000 DEG C and above high-temperature flue gas, main employing at present is first lowered the temperature and is used the way of traditional deduster dedusting again; Cool-down method mainly contain directly cooling as: adopt wild air cooling, water cooling etc.After wild air cooling cooling, exhaust gas volumn increases, and waste heat recovery efficiency is low, and thermal loss is large; Water cooling cooling then increases the complexity of dust pelletizing system, and cooling-down effect is also bad.
Electric cleaner is used for high-temperature dust removal and explores by the states such as U.S., moral, Japan, is mainly in the experimental stage at present, existing reach 650 ~ 790 DEG C, run the experimental record of 100 hours under 570kpa, efficiency of dust collection can reach 95% ~ 99.5%; But exist corona discharge instability, electrode life short, to problems such as smoke components sensitivity, high-temperature insulations, in the short time, be difficult to break through.
The high-temperature dust removal technology studied or studying also has pottery to knit shape filter, ceramic fiber filter, metal felt filter, sintered metal mesh pipe filter, too cotton filter etc., the filter efficiency of these dedusters can reach more than 99%, but all there is respective problem, as strength problem, permanent plugging Problem of Failure, Cost Problems etc.
The domestic report having various granular-bed filter, mainly moving granular bed filter and ebullated bed granular-bed filter, these granular-bed filters all adopt flue gas from the top down through grain bed, and particle is fluidization or boiling-like when reverse gas cleaning.The new and effective double layer particle height of bed temperature filtering technique of up-to-date China of report Shi Yang state professor research and development and equipment, its general principle is: filter course is made up of lightness sensation in the upper and heaviness in the lower, upper coarse and lower fine double-layer filter material, as above metafiltration material is expanded perlite granule, and lower floor's filtrate is extra large sand.During filtration, ash-laden gas from top to bottom through filtering layer, first through coarse grained upper filter material layer, most dust in entrap gas, then through the lower filter material layer of fine grain, intercept and capture the fine dust leaking through filtering layer.During reverse gas cleaning, blowback air is from bottom to top by filtering layer, and two-layer filtrate is all fluidization, and intergranular dust is less easily entrained by away, reaches quick deashing.Because upper strata filtering material particle density is only 1/20 of lower floor's filtrate, upper strata filtering material particle is suspended on lower floor's filter material layer all the time, and two-layer filtrate does not mix mutually mutually, remains that double-decker is constant.But, this granular-bed filter does not still change conventional particles layer filter flue gas from the top down through grain bed, still there is the problem that dust is difficult on grain bed top clear up, fluidised reverse gas cleaning easily produces irregular operation, affects efficiency of dust collection.And existing deduster not for high-temperature flue gas waste heat recovery with effectively utilize.
Summary of the invention
For the above-mentioned shortcoming of prior art, the object of the invention is to provide a kind of high-temperature flue gas waste heat recovery and dust removal integrated plant, its tool has the following advantages: adopt the double-fixed bed structure in the left and right of Ceramic Balls filtrate with departing from tradition, therefore, double-fixed bed structure permission left and right timing reversing, cycle carry out filtering and deashing by turns, allow high-temperature flue gas on one side to realize filtering and accumulation of heat through filtrate bed from bottom to top, and another side external air from top to bottom blowback filtrate bed realize deashing and heat absorption; Constantly can filter ash-laden gas, constantly reclaim waste heat in high-temperature flue gas, and functional regeneration can be made to filtrate bed and to fresh air preheating simultaneously; Not only realized the cooling of high-temperature flue gas and scrubbing, but also improved efficiency of combustion simultaneously, and the cycle of stable operation is longer, environmental protection, energy-conservation, on-road efficiency significantly improve.
For this reason, technical solution of the present invention is a kind of high-temperature flue gas waste heat recovery and dust removal integrated plant, it comprises the stove interface, the filtrate bed that are connected with the bilateral air flue of high temperature kiln, and described integrated apparatus comprises two, left and right wind unit, four-way change-over valve excessively; Each wind unit of crossing comprises from top to bottom: the ash hole of one of uptake, low-temperature space filtrate bed, low-temperature space framework, high-temperature region filtrate bed, high-temperature region framework, described stove interface, disposal box, band active clapboard; Described filtrate bed comprises the Ceramic Balls of accumulation; 2 uptakes connect 2 valve ports of described four-way change-over valve respectively, and other 2 valve ports of described four-way change-over valve connect air inlet, exhaust opening respectively.
The present invention adopts Ceramic Balls as fixed bed filtrate, and two, left and right cross the stove interface of wind unit on the lower, 2 uptakes connect 2 valve ports of described four-way change-over valve and other 2 valve ports respectively and connect air inlet, exhaust opening respectively and just constitute the two wind unit of crossing in left and right of the present invention; Because the enough height of the proportion of Ceramic Balls can not be subject to the loosening of flue gas, larger, the Ceramic Balls bulk density such as the fine fabric of ratio of heat capacities of Ceramic Balls be applicable to retaining dust again relative smooth be easy to deashing; On the one hand, high-temperature flue gas is allowed still can stably to realize filtering and accumulation of heat through filtrate bed, filtrate bed from bottom to top, on the other hand, permission introducing external air from top to bottom blowback filtrate bed realizes filtrate deashing and bottom weight control of dust, effectively can also realize air heat absorption simultaneously, preheated air again via in one of lower furnace interface input stove, reuse heat energy.Therefore, the two so double-fixed bed structure permission air-flow in left and right timing reversing between both left and right crossed wind unit and form, the left and right cycle carries out filtering and deashing by turns.In a word, waste heat recovery of the present invention and dust removal integrated plant, dust in up flue gas constantly can be retained the waste heat in filtration, constantly recovery high-temperature flue gas, realize the cooling of high-temperature flue gas, and descending fresh air can be utilized to make the descending air of gravitational dust collection and functional regeneration and preheating to the dust that filtrate bed retains, thus not only effectively can reduce the Substances Pollution of flue gas and high temperature pollutes, but also improve the efficiency of combustion of stove simultaneously simultaneously.Combustion air is down blowing off the dust being trapped in refractory ball surface into disposal box through fixed bed, and fixed bed high-temperature region refractory ball completes regeneration, can drop into accumulation of heat and the dedusting in next cycle.And to sum up analyze visible, the cycle of apparatus of the present invention stable operation is longer, and environmental protection, energy-conservation, on-road efficiency are significantly improved.
For improving operation stability, finishing simplification further, dust removal integrated plant of the present invention comprises following structure to be improved:
Described low-temperature space filtrate bed, high-temperature region filtrate bed also comprise the filtrate basket of the stainless steel of splendid attire Ceramic Balls.
For improving device working life further, increasing the temperature cycle of operation, dust removal integrated plant of the present invention comprises following structure to be improved:
The material of the filtrate basket of described high-temperature region framework, high-temperature region filtrate bed is high temperature resistant stainless steel.
For increasing device working life further, improving the efficiency of filtration and accumulation of heat, increasing stable operation cycle, dust removal integrated plant of the present invention comprises following structure to be improved:
The granularity of described Ceramic Balls is 10-20mm, and in filtrate bed, the bulk density of Ceramic Balls is 1700-2100kg/ cubic meter.
Ceramic Balls in described low-temperature space filtrate bed is the high-alumina refractory material of alundum (Al2O3) content 48-75%; Ceramic Balls in the filtrate bed of described high-temperature region is the corundum refractory material of alundum (Al2O3) content 75-90%.
For further simplification device overall structure, be convenient to installation and maintenance, increase high-temperature filter material change the ease-to-operate safeguarded with hinge rotational structure, dust removal integrated plant of the present invention comprises following structure to be improved:
Described wind unit of crossing comprises mutually corresponding upper and lower cylinder; Described uptake, low-temperature space filtrate bed, low-temperature space framework is comprised successively in upper cylinder; The ash hole of one of described high-temperature region framework, stove interface, disposal box, band active clapboard is comprised successively in lower cylinder; Hinge axis is equiped with between described upper and lower cylinder, described high-temperature region filtrate bed is between upper and lower cylinder, its filtrate basket to be hinged on this hinge axis and its periphery comprise can be closely sealed with upper and lower cylinder sealing ring, this hinge axis is also hinged with high-temperature region filtrate bed for subsequent use and the filtrate basket of same structure and material simultaneously.
For the globality increasing apparatus structure further, the simplicity of suiting measures to local conditions, dust removal integrated plant of the present invention comprises following structure to be improved:
Equal diameters, the axial line of described upper and lower cylinder overlap.
Described upper and lower cylinder is arranged on the platform of different levels respectively.
For increasing the automaticity, intelligent of device cycle rotation further, dust removal integrated plant of the present invention comprises following structure to be improved:
Described four-way change-over valve is with the actuator of electronic switching; Its other 2 valve ports connect air inlet fan, induced-draft fan respectively.
For improving operability, reliability, the feature of environmental protection of deashing control of dust further, dust removal integrated plant of the present invention comprises following structure to be improved:
Described active clapboard comprises can 2 pieces up and down of break-make successively.
Trial production shows, beneficial effect of the present invention comprises:
1, realize the waste heat recovery of more than 200-1000 DEG C high-temperature flue gas and dust removal integrated, efficiency of dust collection can reach 99%, and flue-gas temperature is reduced to 150 ~ 200 DEG C, obtains remarkable effects of energy conservation and environmental protection.
2, burning combustion air blasts, and by regenerative fixed bed heat is taken away and participates in burning, realizes the fume afterheat warm-up combustion-supporting air utilizing industrial furnace, improves fuel combustion, improve thermal efficiency of industrial furnace, realize energy-conservation 10%-30%.
3, high-temperature flue gas waste heat recovery of the present invention and dust removal integrated new technology, be different from traditional granular-bed filter, flue gas is adopted to enter grain bed from bottom to top, dust is convenient to cleaning in grain bed bottom, and can not again be deposited in stratum granulosum top, plugging particle layer due to gravity when deashing, this flue gas is from bottom to top, reverse gas cleaning new technological flow from top to bottom, is conducive to the raising of cleaning efficiency.
4, structure of the present invention is fixed-bed structure, and the situation of irregular operation can not appear in particle because of fluidisation or boiling.The double-fixed bed structure that the present invention adopts, can timing reversing, and the cycle is reused, and realizes the functional regeneration of stratum granulosum, and adopts online replacing technology for subsequent use, for continuous seepage provides safeguard, belongs to regenerative fixed bed.
5, bed technology has the report being applied to industrial furnace heat-accumulation combustion at present, and its mainly accumulation of heat effect, also known as regenerator.Effect is exactly that air produces high temperature air by fixed bed accumulation of heat, come combustion-supporting with high temperature air, domestic title regenerative combustion technology or be called heat accumulating type high temperature air combustion technology, tradition heat-accumulation combustion adopt fixed bed gas flow be flue gas from the top down, air from the bottom up, exhaust gas dust still stays industrial furnace inside, do not possess dedusting function, and apparatus of the present invention have dedusting heat accumulation function concurrently.
6, in apparatus of the present invention, flue gas is from bottom to top, reverse gas cleaning renewable high-effective dust-removing technology from top to bottom, comprehensive function that is efficient, energy-saving and environmental protection can be reached, greatly reduce the resistant to elevated temperatures requirement of cleaner simultaneously, reduce costs, extend the service life of cleaner, enhance productivity.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is that integrated apparatus embodiment of the present invention filters the structural representation of right unit deashing at left unit.
Fig. 2 is the structural representation that Fig. 1 embodiment is filtered at the right unit of left unit deashing.
Fig. 3 is the structural representation that in Fig. 1 embodiment, high-temperature region for subsequent use filtrate bed switches.
Detailed description of the invention
As Fig. 1,2, shown in be respectively integrated apparatus embodiment of the present invention difference switch under structural representation.A kind of high-temperature flue gas waste heat recovery of the present invention and dust removal integrated plant embodiment, it comprises the stove interface 27, the filtrate bed that are connected with the bilateral air flue 11,12 of high temperature kiln (do not give and illustrating), and described filtrate bed comprises the filtrate basket 20(of the stainless steel of splendid attire Ceramic Balls (do not give and illustrating) see Fig. 3), to be deposited in granularity in filtrate basket 20 be the Ceramic Balls of 10-20mm; In filtrate bed, the bulk density of Ceramic Balls is 1700-2100kg/ cubic meter.And described integrated apparatus comprises two, left and right and crosses wind unit, four-way change-over valve 40 with electronic switching actuator 41.
Cylinder 201, lower cylinder 202 in the mutual correspondence that left and right wind unit excessively comprises equal diameters, axial line overlaps; Described upper and lower cylinder 201,202 is arranged on respectively on the platform of different levels and (does not give and illustrating).Described uptake 21, upper collecting chamber 22, low-temperature space filtrate bed 23, low-temperature space framework 24 is comprised successively in upper cylinder 201; The ash hole of one of described high-temperature region framework 26, stove interface 27, disposal box 28, band active clapboard 29 is comprised successively in lower cylinder 202; Described active clapboard 29 comprises can 2 pieces up and down of break-make successively.Hinge axis 30 is equiped with between described upper and lower cylinder 201,202, and high-temperature region filtrate bed 250 is between upper and lower cylinder 201,202, its filtrate basket 20(is see Fig. 3) to be hinged on this hinge axis 30 and its periphery comprise can with upper and lower cylinder 201,202 closely sealed sealing rings (not being shown in detail), this hinge axis 30 is also hinged with high-temperature region filtrate bed 251 for subsequent use and the filtrate basket 20 of same structure and material simultaneously.The material of the filtrate basket 20 of described high-temperature region framework 26, high-temperature region filtrate bed 250 is high temperature resistant stainless steel.
2 uptakes 21 crossing wind unit connect 2 valve ports of described four-way change-over valve 40 respectively, and other 2 valve ports of described four-way change-over valve 40 are respectively by air inlet fan 42, induced-draft fan 43 and connect air inlet, exhaust opening (not all being shown in detail).
Ceramic Balls in described low-temperature space filtrate bed 23 is the high-alumina refractory material of alundum (Al2O3) content 48-75%; Ceramic Balls in described high-temperature region filtrate bed 250 is the corundum refractory material of alundum (Al2O3) content 75-90%.
As Fig. 3, be depicted as the structural representation that in Fig. 1 embodiment, high-temperature region for subsequent use filtrate bed switches.Owing to hinge axis 30 being hinged with high-temperature region filtrate bed 250 and high-temperature region filtrate bed 251 for subsequent use simultaneously, and its filtrate basket 20 periphery all comprise can with upper and lower cylinder 201,202 closely sealed sealing rings (not being shown in detail), therefore, apparatus of the present invention can displace with high-temperature region filtrate bed 251 for subsequent use the high-temperature region filtrate bed 250 needing overhaul process in good time neatly, thus guarantee device can long-term stability, environmental protection, energy-conservation, run efficiently.
Integrated apparatus embodiment handover operation of the present invention is as follows:
Switch 1 as shown in Figure 1, for integrated apparatus embodiment of the present invention to filter the structural representation of right unit deashing at left unit: on the left of high temperature kiln, air flue 11 high-temperature flue gas is out from bottom to top successively through left stove interface 27, high-temperature region filtrate bed 250, low-temperature space filtrate bed 23, uptake 21, four-way change-over valve 40 left entry, the induced-draft fan 43 of crossing wind unit, is discharged in environment by exhaust opening; The left filtrate bed crossing wind unit still can stably realize filtering and accumulation of heat; On the other hand, the external air introduced by air inlet fan 42 by air inlet is from top to bottom successively through four-way change-over valve 40 right entry, right uptake 21, low-temperature space filtrate bed 23, high-temperature region filtrate bed 250, the stove interface 27 crossing wind unit, input in high temperature kiln by air flue on the right side of high temperature kiln 12, right wind unit filtrate bed of crossing obtains reverse gas cleaning and realizes bottom weight control of dust, effectively can also realize air heat absorption simultaneously, preheated air again via in one of lower furnace interface input stove, reuse heat energy.
Switch 2 as shown in Figure 2, structural representation for integrated apparatus embodiment of the present invention is filtered at the right unit of left unit deashing: under the control of electronic switching actuator 41, the internal path of four-way change-over valve 40 switches, the operation in the unit of left and right of air and high-temperature flue gas is just in time contrary with the flow direction, does not describe in detail for this reason.
By the continuous cycling of above-mentioned switching, uninterruptedly realize ash-laden gas to filter, uninterruptedly make functional regeneration to filtrate bed, and the waste heat that can uninterruptedly reclaim in high-temperature flue gas, realize the cooling of high-temperature flue gas and the preheating of fresh air simultaneously, thus not only effectively reduced smoke pollution, but also improve efficiency of combustion simultaneously.
Claims (10)
1. high-temperature flue gas waste heat recovery and a dust removal integrated plant, it comprises the stove interface, the filtrate bed that are connected with the bilateral air flue of high temperature kiln, it is characterized in that: described integrated apparatus comprises two, left and right and crosses wind unit, four-way change-over valve; Each wind unit of crossing comprises from top to bottom: the ash hole of one of uptake, low-temperature space filtrate bed, low-temperature space framework, high-temperature region filtrate bed, high-temperature region framework, described stove interface, disposal box, band active clapboard; Described filtrate bed comprises the Ceramic Balls of accumulation; 2 uptakes connect 2 valve ports of described four-way change-over valve respectively, and other 2 valve ports of described four-way change-over valve connect air inlet, exhaust opening respectively.
2. high-temperature flue gas waste heat recovery and dust removal integrated plant as claimed in claim 1, is characterized in that: described low-temperature space filtrate bed, high-temperature region filtrate bed also comprise the filtrate basket of the stainless steel of splendid attire Ceramic Balls.
3. high-temperature flue gas waste heat recovery and dust removal integrated plant as claimed in claim 2, is characterized in that: the material of the filtrate basket of described high-temperature region framework, high-temperature region filtrate bed is high temperature resistant stainless steel.
4. high-temperature flue gas waste heat recovery and dust removal integrated plant as claimed in claim 1 or 2, is characterized in that: the granularity of described Ceramic Balls is 10-20mm, and in filtrate bed, the bulk density of Ceramic Balls is 1700-2100kg/ cubic meter.
5. high-temperature flue gas waste heat recovery and dust removal integrated plant as claimed in claim 1 or 2, is characterized in that: the Ceramic Balls in described low-temperature space filtrate bed is the high-alumina refractory material of alundum (Al2O3) content 48-75%; Ceramic Balls in the filtrate bed of described high-temperature region is the corundum refractory material of alundum (Al2O3) content 75-90%.
6. high-temperature flue gas waste heat recovery and dust removal integrated plant as claimed in claim 3, is characterized in that: described wind unit of crossing comprises mutually corresponding upper and lower cylinder; Described uptake, low-temperature space filtrate bed, low-temperature space framework is comprised successively in upper cylinder; The ash hole of one of described high-temperature region framework, stove interface, disposal box, band active clapboard is comprised successively in lower cylinder; Hinge axis is equiped with between described upper and lower cylinder, described high-temperature region filtrate bed is between upper and lower cylinder, its filtrate basket to be hinged on this hinge axis and its periphery comprise can be closely sealed with upper and lower cylinder sealing ring, this hinge axis is also hinged with high-temperature region filtrate bed for subsequent use and the filtrate basket of same structure and material simultaneously.
7. high-temperature flue gas waste heat recovery and dust removal integrated plant as claimed in claim 6, is characterized in that: equal diameters, the axial line of described upper and lower cylinder overlap.
8. high-temperature flue gas waste heat recovery and dust removal integrated plant as claimed in claim 6, is characterized in that: described upper and lower cylinder is arranged on the platform of different levels respectively.
9. high-temperature flue gas waste heat recovery and dust removal integrated plant as claimed in claim 1, is characterized in that: described four-way change-over valve is with the actuator of electronic switching; Its other 2 valve ports connect air inlet fan, induced-draft fan respectively.
10. high-temperature flue gas waste heat recovery and dust removal integrated plant as claimed in claim 1, is characterized in that: described active clapboard comprises can 2 pieces up and down of break-make successively.
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