CN103708569A - Wheel-type pyrolyzer used for papermaking black liquid treatment - Google Patents
Wheel-type pyrolyzer used for papermaking black liquid treatment Download PDFInfo
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- CN103708569A CN103708569A CN201310644312.1A CN201310644312A CN103708569A CN 103708569 A CN103708569 A CN 103708569A CN 201310644312 A CN201310644312 A CN 201310644312A CN 103708569 A CN103708569 A CN 103708569A
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Abstract
The invention discloses a wheel-type papermaking black liquid pyrolyzer. Continuous scooping is achieved by utilization of a wheel-type structure and a liquid scooping device. Papermaking black liquid is subjected to pyrolysis by utilization of exhaust gases of a boiler as a heat source. The generated mixed gases are burnt through a combustor and converted into clean gases which are discharged. The generated exhaust gases go into an exhaust gas circulation system and go into a plurality of heat exchangers along with boiler exhaust gases, and papermaking black liquid is preheated. The residues after pyrolysis are rotated to a certain height along with the liquid scooping device and falls on a residue draining baffle plate. The pyrolyzer is advantaged by simple structure, convenient operation, and large processing amount. Heat for pyrolysis of papermaking black liquid is from heat exchanged from boiler exhaust gases. When the treatment method is compared with a conventional processing method, energy consumption during the processing is lowered.
Description
Technical field
The invention belongs to industrial waste residue disposal equipment, be specifically related to a kind of wheeled pyrolyzer of processing for black liquid.
Background technology
Papermaking raw material used is mainly agricultural crop straw, in its composition, all contain Mierocrystalline cellulose, xylogen and hemicellulose (glycan class) three parts, in paper-making process, only utilized part Mierocrystalline cellulose wherein, other accounts for 25% xylogen and accounts for the compositions such as 28% hemicellulose and wood sugar, potassium, nitrogen, phosphorus, discarded with black liquid.And in black liquor, contained xylogen and hemicellulose and wood sugar, potassium, nitrogen, phosphorus etc. all have very high utility value in work, agriculture production.
Three strands of waste water are discharged by operation in paper mill: the one, and pulping cooking waste liquor, i.e. black liquid; The 2nd, after separated black liquor, the washing of paper pulp, choosing, drift ice, also claim middle section water; The 3rd, the plain boiled water on paper machine, plain boiled water can be processed rear reuse.In fact middle section water is the incomplete remaining part of black liquid extraction, generally account for total amount 10% in, and contained the more than 90% of pollutent Zhan Quan factory disposal of pollutants total amount in black liquor, therefore, black liquid is the major portion that pollute in paper mill, significant for effective processing of black liquid.
Patent 1: a kind for the treatment of process (CN201210095877.4 applying date 2012.4.1) that is applicable to black liquid (black paper-making liquid of alkali pulping that the wheat straw class of particularly take is raw material).By the first standing processing of fresh black liquor, the black liquor after processing adds high-efficient alkali and analyses agent, separates out xylogen, and filtrate is carried out biological reinforcing technology processing again.Through experimental study, find, the method black liquid treatment capacity is little, and equipment is loaded down with trivial details, is not easy to operation.
Patent 2: a kind of high-efficient multi-function treatment device for black liquor of papermaking (CN02255202.2, applying date 2002-11-11).Can realize and black liquid is processed to the while up to standard can realize the black liquor after processing is carried out to recycle can be by the task of the lignin extraction and application in black liquor.Because this patent need to be extracted xylogen, thus higher to technical requirements, being not easy to extensively investment and exploitation, applicable surface is less.
Therefore there is Technologies of Black Liquor Treatment and the device of the features such as energy consumption is low, format high throughput, safe and reliable, equipment is simple, will there is important engineering using value.
Summary of the invention
The object of the present invention is to provide a kind of wheeled pyrolyzer of processing for black liquid, can increase substantially the heat treatment capacity of black liquid, and there is the features such as safe and reliable, equipment simple, easy handling, treatment capacity are large.。
The technical solution that realizes the object of the invention is: a kind of wheeled pyrolyzer of processing for black liquid, comprises pyrolysis case, flue gas blower fan, burner, first-class heat exchanger, flue gas shunting device and secondary heat exchanger, pyrolysis case comprises driving toothed gear, wheel disc, liquid getting device, reservoir, the baffle plate of slagging tap, slag notch, smoke inlet passage, spout and exhanst gas outlet passage, wherein reservoir, slag tap baffle plate and smoke inlet passage is all arranged on pyrolysis case bottom, driving toothed gear is arranged on pyrolysis case center, and be positioned at wheel disk center, N liquid getting device is evenly arranged on the circumferential edges of wheel disc, N >=4, reservoir is set below wheel disc, driving toothed gear drives wheel disc and liquid getting device to rotate, guarantee that liquid getting device stretches into reservoir and dips black liquid, at the reservoir one side setting baffle plate of slagging tap, be connected with the slag notch that is arranged on pyrolysis case shell, reservoir opposite side is provided with smoke inlet passage, on the pyrolysis case shell above reservoir, be provided with spout, pyrolysis box top and with the shell of smoke inlet passage homonymy on be provided with exhanst gas outlet passage, exhanst gas outlet passage, flue gas blower fan, burner, first-class heat exchanger, flue gas shunting device is connected by flue successively with smoke inlet passage, and flue gas shunting device is connected with secondary heat exchanger by flue again, secondary heat exchanger, first-class heat exchanger is connected by liquid-transport pipe-line successively with spout.
The baffle plate of slagging tap is connected the height of a side higher than the height of the side that is connected with slag notch with reservoir, the baffle plate of slagging tap is arranged on that side that liquid getting device is rotated down, and can receive from the residue of free-falling in liquid getting device.
Several interchanger are set on smoke pipe or liquid-transport pipe-line.
The present invention compared with prior art, its remarkable advantage: send out and compare with electrodialysis with conventional Silvola recovery, the wheeled pyrolyzer system that the design proposes, high-temperature flue gas by power plant emission heats, make the Mierocrystalline cellulose in black liquid, hemicellulose, the organic substance pyrolytic gasifications such as xylogen, the methane that utilizes a simple burner that pyrolysis is produced, hydrogen, the burning such as carbon monoxide generates carbonic acid gas and water, and then prevented the pollution of pyrolysis gas to environment, this designing apparatus less investment, simple to operation, treatment capacity is large, and the energy of pyrolysis black liquid is from the heat exchange with flue gas, compare with conventional treatment process and reduced the energy consumption in treating processes.
Accompanying drawing explanation
Fig. 1 is wheeled pyrolyzer device schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
It is thermal source that the high-temperature flue gas of boiler combustion discharge is take in the present invention, under the condition of oxygen deprivation, the laser heating of realization to black liquid, heat-processed is dried black liquid and starts pyrolysis, the gases such as the methane that pyrolysis produces, hydrogen, carbon monoxide are through burner combustion, thereby have prevented the pollution of pyrolysis gas to environment.Dried waste residue is stayed in liquid getting device 3, and servo-actuated wheel disc rotates and reaches certain angle, because action of gravity drops on the baffle plate of slagging tap, and is slipped to slag notch, and slag notch is blocked, and realizes automatic sealing gland, at the interior pressure-fired of realizing of pyrolysis case 15.
The processing 35.3m3 black liquid per hour of take is example:
Pyrolysis case 15 geometrical characteristic parameters are: lower cross section size 1000 * 500mm, height 1000mm.Wheel disc 2 radius 300mm, wheel disc 2 thickness 300mm, the long 100mm of liquid getting device 3, wide 300mm, degree of depth 50mm, 12 liquid getting devices 3 altogether, reservoir 4 right sides and cinder notch 6 are at a distance of 29cm, right side height of baffle plate 15cm.
The Typical Disposition of parameters of operating part is as follows:
(1) flue gas blower fan: centrifugal blower, flow 500m
3/ h, pressure head 350Pa, speed control by frequency variation;
(2) driving toothed gear drive-motor: three-phase asynchronous motor, rotating speed 4r/min;
Key operation parameter is as follows:
The temperature T 1=450 ℃ of smoke inlet place;
Smoke outlet temperature T 2=220 ℃;
Flow V2=80 m of smoke inlet place
3/ h
The mean specific heat 1.122kj/ (kg ℃) of flue gas,
The mean density of flue gas is 1100kg/m3
Black liquid decomposes needed heat and is about 523kJ/kg
The density of black liquid is about 1230kg/m3
Per hour as calculated can pyrolysis 35.3m3 black liquid.
A wheeled pyrolyzer of processing for black liquid, comprises pyrolysis case 15, flue gas blower fan 10, burner 11, first-class heat exchanger 12, flue gas shunting device 13 and secondary heat exchanger 14, pyrolysis case 15 comprises driving toothed gear 1, wheel disc 2, liquid getting device 3, reservoir 4, the baffle plate 5 of slagging tap, slag notch 6, smoke inlet passage 7, spout 8 and exhanst gas outlet passage 9, wherein reservoir 4, slag tap baffle plate 5 and smoke inlet passage 7 is all arranged on pyrolysis case 15 bottoms, driving toothed gear 1 is arranged on pyrolysis Xiang15 center, and be positioned at wheel disc 2 centers, drive wheel disc 2 to rotate, 12 liquid getting devices 3 are evenly arranged on the circumferential edges of wheel disc 2, reservoir 4 is set below wheel disc 2, liquid getting device 3 stretches into reservoir 4 and dips black liquid, at the reservoir 4 one side settings baffle plate 5 of slagging tap, be connected with the slag notch 6 that is arranged on pyrolysis case 15 shells, reservoir 4 opposite sides are provided with smoke inlet passage 7, on pyrolysis case 15 shells above reservoir 4, be provided with spout 8, pyrolysis case 15 tops and with the shell of smoke inlet passage 7 homonymies on be provided with exhanst gas outlet passage 9, exhanst gas outlet passage 9, flue gas blower fan 10, burner 11, first-class heat exchanger 12, flue gas shunting device 13 is connected by flue successively with smoke inlet passage 7, and flue gas shunting device 13 is connected with secondary heat exchanger 14 by flue again, secondary heat exchanger 14, first-class heat exchanger 12 is connected by pipeline successively with spout 8.
The side height that the baffle plate 5 of slagging tap is connected with reservoir 4 is higher than the side height being connected with slag notch 6, and the baffle plate 5 of slagging tap is arranged on that side that liquid getting device 3 is rotated down, and can receive from the residue of liquid getting device 3 interior free-fallings.
Both vertexs of baffle plate 5 or reservoir 4 of slagging tap are greater than driving toothed gear 1 center to the maximum distance of liquid getting device 3 bottoms to the distance at driving toothed gear 1 center, guarantee when driving toothed gear 1 drives wheel disc 2 and liquid getting device 3 to rotate, both vertexs of baffle plate 5 or reservoir 4 of slagging tap do not affect liquid getting device 3 and rotate.
Flow through secondary heat exchanger 14, first-class heat exchanger 12 of black liquid progressively promotes temperature by heat exchange, then through spout 8, injects in wheeled pyrolyzer.Driving toothed gear 1 drives wheel disc 2 to do clockwise circumferential motion, during liquid getting device 3 process reservoir 4, dip a small amount of black liquid, subsequently by hot flue gas direct drying, after organic composition pyrolysis, with flue gas, get rid of, desciccate forwards certain angle to liquid getting device 3, because action of gravity is dropped on the baffle plate 5 of slagging tap, and be slipped to slag notch 6, slag notch 6 is blocked, realized automatic sealing gland, can by slag notch 6, get rid of pyrolysis case 15 at any time.High-temperature flue gas enters pyrolysis case 15 by smoke inlet passage 7, after heating black liquid, by exhanst gas outlet passage 9, discharge pyrolysis case, along pipeline, through flue gas blower fan 10, enter burner 11, in burner 11, after combustion heating, discharge, along pipeline, entering the interior heat exchange of first-class heat exchanger 12 is cooled to temperature required, enter again flue gas shunting device 13, shunting rear section flue gas again enters pyrolysis case 15 by smoke inlet passage 7 and circulates, and residue flue gas flow is disposed in atmosphere after secondary heat exchanger 14 and black liquid heat exchange.
By example, can find out, wheeled interchanger can be realized the continuous processing to black liquid, has utilized the smoke pre-heating of boiler, has reduced greatly energy consumption, and can process more black liquid within the unit time, owing to processing black liquid, also produce high-temperature flue gas, by internal recycling, again enter pyrolysis case heating black liquid, reduced energy consumption, and simple to operate, to invest littlely, the plant investment that is applicable to various scales is used.
Claims (3)
1. a wheeled pyrolyzer of processing for black liquid, it is characterized in that: comprise pyrolysis case (15), flue gas blower fan (10), burner (11), first-class heat exchanger (12), flue gas shunting device (13) and secondary heat exchanger (14), pyrolysis case (15) comprises driving toothed gear (1), wheel disc (2), liquid getting device (3), reservoir (4), the baffle plate (5) of slagging tap, slag notch (6), smoke inlet passage (7), spout (8) and exhanst gas outlet passage (9), reservoir (4) wherein, slag tap baffle plate (5) and smoke inlet passage (7) is all arranged on pyrolysis case (15) bottom, driving toothed gear (1) is arranged on pyrolysis case (15) center, and be positioned at wheel disc (2) center, N liquid getting device (3) is evenly arranged on the circumferential edges of wheel disc (2), N >=4, in wheel disc (2) below, reservoir (4) is set, driving toothed gear (1) drives wheel disc (2) and liquid getting device (3) to rotate, guarantee that liquid getting device (3) stretches into reservoir (4) and dips black liquid, at reservoir (4) the one side settings baffle plate (5) of slagging tap, be connected with the slag notch (6) that is arranged on pyrolysis case (15) shell, reservoir (4) opposite side is provided with smoke inlet passage (7), on pyrolysis case (15) shell of reservoir (4) top, be provided with spout (8), pyrolysis case (15) top and with the shell of smoke inlet passage (7) homonymy on be provided with exhanst gas outlet passage (9), exhanst gas outlet passage (9), flue gas blower fan (10), burner (11), first-class heat exchanger (12), flue gas shunting device (13) is connected by flue successively with smoke inlet passage (7), flue gas shunting device (13) is connected with secondary heat exchanger (14) by flue again, secondary heat exchanger (14), first-class heat exchanger (12) is connected by liquid-transport pipe-line successively with spout (8).
2. the wheeled pyrolyzer of processing for black liquid according to claim 1, it is characterized in that: the baffle plate of slagging tap (5) is connected the height of a side higher than the height of the side that is connected with slag notch (6) with reservoir (4), the baffle plate (5) of slagging tap is arranged on that side that liquid getting device (3) is rotated down, and can receive from the residue of the interior free-falling of liquid getting device (3).
3. the wheeled pyrolyzer of processing for black liquid according to claim 1, is characterized in that: several interchanger are set on smoke pipe or liquid-transport pipe-line.
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| CN201310644312.1A CN103708569B (en) | 2013-12-05 | 2013-12-05 | Wheel-type pyrolyzer used for papermaking black liquid treatment |
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| CN201310644312.1A CN103708569B (en) | 2013-12-05 | 2013-12-05 | Wheel-type pyrolyzer used for papermaking black liquid treatment |
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| CN103708569A true CN103708569A (en) | 2014-04-09 |
| CN103708569B CN103708569B (en) | 2014-12-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0118058A2 (en) * | 1983-03-04 | 1984-09-12 | Deutsche Babcock Aktiengesellschaft | Process and apparatus for the destruction of liquid or pasty waste |
| JP2008039331A (en) * | 2006-08-09 | 2008-02-21 | Mitsubishi Materials Techno Corp | Processing system and method for discarded automobile |
| CN101307244A (en) * | 2008-06-27 | 2008-11-19 | 东南大学 | Oil-making method of double-bed interactive and circling type for pyrolyzing sludge |
| CN101717175A (en) * | 2009-12-03 | 2010-06-02 | 清华大学 | Constant-pressure muggy gasification and pyrolysis conditioning method of sludge in sewage plant |
| CN102022739A (en) * | 2009-09-15 | 2011-04-20 | 上海煜工环保科技有限公司 | Smoke pyrolysis and gasification incineration waste treatment method and device |
-
2013
- 2013-12-05 CN CN201310644312.1A patent/CN103708569B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0118058A2 (en) * | 1983-03-04 | 1984-09-12 | Deutsche Babcock Aktiengesellschaft | Process and apparatus for the destruction of liquid or pasty waste |
| JP2008039331A (en) * | 2006-08-09 | 2008-02-21 | Mitsubishi Materials Techno Corp | Processing system and method for discarded automobile |
| CN101307244A (en) * | 2008-06-27 | 2008-11-19 | 东南大学 | Oil-making method of double-bed interactive and circling type for pyrolyzing sludge |
| CN102022739A (en) * | 2009-09-15 | 2011-04-20 | 上海煜工环保科技有限公司 | Smoke pyrolysis and gasification incineration waste treatment method and device |
| CN101717175A (en) * | 2009-12-03 | 2010-06-02 | 清华大学 | Constant-pressure muggy gasification and pyrolysis conditioning method of sludge in sewage plant |
Non-Patent Citations (2)
| Title |
|---|
| 李腊红: "回转窑焚烧炉处理醋酸残渣和丁烯醛废液", 《山西化工》, vol. 29, no. 5, 31 October 2009 (2009-10-31), pages 69 - 70 * |
| 蒋家羚等: "废轮胎热裂解设备的开发", 《化工进展》, vol. 21, no. 9, 30 September 2002 (2002-09-30), pages 681 - 684 * |
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