CN114251669B - Tanning sludge pyrolysis incinerator with chromium oxidation inhibiting function and treatment method thereof - Google Patents
Tanning sludge pyrolysis incinerator with chromium oxidation inhibiting function and treatment method thereof Download PDFInfo
- Publication number
- CN114251669B CN114251669B CN202111541155.2A CN202111541155A CN114251669B CN 114251669 B CN114251669 B CN 114251669B CN 202111541155 A CN202111541155 A CN 202111541155A CN 114251669 B CN114251669 B CN 114251669B
- Authority
- CN
- China
- Prior art keywords
- chamber
- pyrolysis
- incineration
- sludge
- ash
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 138
- 239000010802 sludge Substances 0.000 title claims abstract description 66
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 31
- 239000011651 chromium Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 15
- 230000003647 oxidation Effects 0.000 title claims abstract description 14
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 10
- 230000009467 reduction Effects 0.000 claims abstract description 48
- 238000005192 partition Methods 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000002893 slag Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000010985 leather Substances 0.000 claims description 21
- 230000000903 blocking effect Effects 0.000 claims description 13
- 238000006388 chemical passivation reaction Methods 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 8
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000006477 desulfuration reaction Methods 0.000 claims description 5
- 230000023556 desulfurization Effects 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 230000005764 inhibitory process Effects 0.000 claims 1
- 238000000638 solvent extraction Methods 0.000 claims 1
- 239000002956 ash Substances 0.000 description 49
- 239000007789 gas Substances 0.000 description 19
- 230000008569 process Effects 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Gasification And Melting Of Waste (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of incinerators, in particular to a tanning sludge pyrolysis incinerator with a chromium oxidation inhibiting function and a treatment method thereof, comprising a furnace body, wherein a feed inlet and a slag discharge outlet are respectively arranged on the furnace body, a pyrolysis chamber, an incineration chamber and a slag reduction chamber are arranged in the furnace body, the feed inlet is communicated with the pyrolysis chamber, a partition mechanism is arranged between the pyrolysis chamber and the incineration chamber, the partition mechanism is used for connecting or sealing the pyrolysis chamber and the incineration chamber, and realizes that tanning sludge in the pyrolysis chamber enters the incineration chamber or seals the pyrolysis chamber in a partition manner.
Description
Technical Field
The invention relates to the technical field of incinerators, in particular to a tanning sludge pyrolysis incinerator with a chromium oxidation inhibiting function and a treatment method thereof.
Background
The tanning sludge is a large amount of industrial solid waste produced by the tanning industry and has the characteristics of high organic matter content and high heavy metal chromium content. The common disposal mode of the tanning sludge is incineration or pyrolysis, but if a common incinerator is adopted in the incineration process, trivalent chromium in the tanning sludge is greatly oxidized into hexavalent chromium due to excessive air, the hexavalent chromium has better solubility, and a strong three-cause effect is achieved, so that ash residues are classified as dangerous wastes, serious pollution is caused to the production environment, the disposal cost of the ash residues is greatly increased, and the economic burden of enterprises is increased. If a pyrolysis mode is adopted, the biochar generated in the pyrolysis process has limited application in soil remediation and the like due to the high chromium content. Therefore, chromium-containing organic solid wastes such as tanning sludge require strict control of chromium oxidation in the incineration pyrolysis process, however, the incineration process is an oxygen-enriched condition, and control of chromium oxidation is extremely difficult. It has been pointed out that chromium oxidation reaction can be inhibited by adding kaolin, phosphate and the like, however, adding strong acid salt and kaolin during the incineration of tanning sludge affects the calorific value of tanning sludge, resulting in insufficient heat of the incinerator, thereby affecting the normal operation of the whole incinerator.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problem that the existing tanning sludge can oxidize trivalent chromium into hexavalent chromium in a large amount in an incinerator, the invention provides a tanning sludge pyrolysis incinerator with a chromium oxidation inhibiting function and a treatment method thereof.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a possess tanning mud pyrolysis incinerator that restraines chromium oxidation function, includes the furnace body, be provided with feed inlet and slag tap on the furnace body respectively, have pyrolysis chamber, burn room and ash reduction chamber in the furnace body, feed inlet and pyrolysis chamber intercommunication, be provided with the partition mechanism between pyrolysis chamber and the burning chamber, the partition mechanism is used for connecting or seal the partition between pyrolysis chamber and the burning chamber to realize that the tanning mud in the pyrolysis chamber enters into the burning chamber or cuts off sealedly, burn room and ash reduction chamber intercommunication each other, burn the room and be located between pyrolysis chamber and the ash reduction chamber, slag tap and ash reduction chamber intercommunication, be provided with the first pipeline of intercommunication each other between pyrolysis chamber and the ash reduction chamber, be provided with the valve that is used for opening and close on the first pipeline, be provided with the pipeline who carries combustible medium in the burning chamber.
The invention reforms the incinerator into the pyrolysis chamber, the incineration chamber and the ash reduction chamber, the pyrolysis chamber dries and pyrolyzes the tanning sludge under the condition of isolating air, thereby generating a large amount of pyrolysis gas and leading the pyrolysis gas into the ash reduction chamber, the hexavalent chromium in the ash is reduced into trivalent chromium by the pyrolysis gas under the action of pyrolysis atmosphere by the temperature of the ash, the pyrolysis gas stays in the ash reduction chamber and upwards enters the incineration chamber to be incinerated together with a combustible medium and then discharged.
In order to realize the partition mechanism, further, the partition mechanism comprises a partition plate and a driving mechanism, a chute is arranged between the pyrolysis chamber and the incineration chamber on the furnace body, the partition plate is matched with the chute, the partition plate is arranged in the chute in a sliding manner, the driving mechanism is arranged on the furnace body, and the output end of the driving mechanism is arranged on the partition plate. The baffle plate is driven to slide in the chute by the driving mechanism, and the pyrolysis chamber and the incineration chamber are controlled to be connected or separated.
In order to prevent the tanning sludge from directly falling into the ash reduction chamber, a blocking net for preventing the tanning sludge from falling into the ash reduction chamber is further arranged in the incineration chamber, and the blocking net is positioned between the conveying pipeline and the blocking mechanism. Through setting up the separation net in the incineration chamber, the separation net will make leather mud and burn in the incineration chamber, prevents that leather mud from directly falling to the lime-ash reduction chamber.
In order to ensure that the pyrolysis gas enters the ash reduction chamber from the pyrolysis chamber, a first fan is further arranged on the first pipeline. Through setting up first fan on first pipeline, pyrolysis gas passes through first pipeline from pyrolysis chamber to ash reduction chamber under the guide of first fan.
In order to reduce the damage of the flue gas in the incineration chamber to the environment, a second pipeline is communicated between the incineration chamber and the ash reduction chamber, and a second fan and a dust removing device are arranged on the second pipeline. And the flue gas is conveyed to the dust removal device for dust removal through the second pipeline, most substances are filtered, and the influence of the flue gas on the environment is reduced.
In order to prevent harmful gas from going out, a desulfurization device is further arranged on the second pipeline. By installing the desulfurization device on the second pipeline, the harmful substances in the flue gas discharged in the incineration chamber can be removed through the desulfurization device.
In order to facilitate the falling of the tanning sludge into the cavity of the required incinerator, the pyrolysis chamber, the incineration chamber and the ash reduction chamber are sequentially arranged from top to bottom. The pyrolysis chamber, the incineration chamber and the ash reduction chamber are sequentially arranged from top to bottom, so that the tanning sludge automatically falls into the required chamber under the action of gravity.
The treatment method of the tanning sludge pyrolysis incinerator with the chromium oxidation inhibiting function comprises the following steps of:
s1, directly entering leather making sludge to be incinerated into an incineration chamber through a feed inlet after being dried, mixing the leather making sludge with a combustible medium conveyed by a conveying pipeline, and incinerating at a high temperature, wherein the temperature of the incineration chamber is 400-1000 ℃;
s2, drying another batch of leather making sludge to be incinerated, and then enabling the leather making sludge to enter a pyrolysis chamber from a feed inlet for pyrolysis;
s3, introducing pyrolysis gas after pyrolysis into an ash reduction chamber through a first pipeline and contacting with incineration ash;
s4, introducing the pyrolyzed tanning sludge in the incineration chamber into the incineration chamber through a partition mechanism.
Further, the temperature of the pyrolysis chamber in the step S2 ranges from 200 ℃ to 400 ℃ and the pyrolysis time ranges from 10min to 20min, and when the pressure in the pyrolysis chamber is higher than 101.325kPa, the pyrolysis gas is conveyed to the ash reduction chamber through the first pipeline.
Further, the residence time of the tanning sludge after pyrolysis in the step S4 in the incineration chamber and the residence time of the incineration ash in the ash reduction chamber are all 10-20 min.
The beneficial effects of the invention are as follows: when the tanning sludge pyrolysis incinerator with the chromium oxidation inhibiting function and the treatment method thereof are used, the incinerator is transformed into the pyrolysis chamber, the incineration chamber and the ash reduction chamber, the pyrolysis chamber dries and pyrolyzes tanning sludge under the condition of isolating air, so that a large amount of pyrolysis gas is generated and is led into the ash reduction chamber, hexavalent chromium in ash is reduced into trivalent chromium by pyrolysis gas under the action of pyrolysis atmosphere by means of the temperature of ash, the pyrolysis gas stays in the ash reduction chamber and then enters the incineration chamber, and is discharged after being incinerated together with a combustible medium.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a front view of the present invention;
fig. 2 is a schematic view of the internal structure of the present invention.
In the figure: 1. furnace body, 101, feed inlet, 102, slag discharging port, 2, pyrolysis chamber, 3, incineration chamber, 4, ash reduction chamber, 5, first pipeline, 6, valve, 7, conveying pipeline, 8, baffle, 9, actuating mechanism, 10, separation net, 11, first fan, 12, second pipeline, 13, dust collector, 14, desulfurizing device, 15, second fan.
Detailed Description
The invention is further described in detail below in connection with the examples:
the present invention is not limited to the following embodiments, and those skilled in the art can implement the present invention in various other embodiments according to the present invention, or simply change or modify the design structure and thought of the present invention, which fall within the protection scope of the present invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
As shown in fig. 1-2, a tanning sludge pyrolysis incinerator with chromium oxidation inhibition function comprises a furnace body 1, wherein a feed inlet 101 and a slag discharge port 102 are respectively arranged on the furnace body 1, a pyrolysis chamber 2, an incineration chamber 3 and a slag reduction chamber 4 are arranged in the furnace body 1, the feed inlet 101 is communicated with the pyrolysis chamber 2, a partition mechanism is arranged between the pyrolysis chamber 2 and the incineration chamber 3, the partition mechanism is used for connecting or sealing the pyrolysis chamber 2 and the incineration chamber 3, tanning sludge in the pyrolysis chamber 2 enters the incineration chamber 3 or seals the pyrolysis chamber 2 in a partition manner, the incineration chamber 3 and the slag reduction chamber 4 are mutually communicated, the incineration chamber 3 is positioned between the pyrolysis chamber 2 and the slag reduction chamber 4, the slag discharge port 102 is communicated with the slag reduction chamber 4, a first pipeline 5 which is mutually communicated is arranged between the pyrolysis chamber 2 and the slag reduction chamber 4, a valve 6 which is used for opening and closing is arranged on the first pipeline 5, and a conveying pipeline 7 for conveying combustible media is arranged in the incineration chamber 3. The combustible medium here is natural gas.
The partition mechanism comprises a partition plate 8 and a driving mechanism 9, a chute is arranged between the pyrolysis chamber 2 and the incineration chamber 3 on the furnace body 1, the partition plate 8 is matched with the chute, the partition plate 8 is arranged in the chute in a sliding manner, the driving mechanism 9 is arranged on the furnace body 1, and the output end of the driving mechanism 9 is arranged on the partition plate 8. The driving mechanism 9 is a servo motor, a gear is arranged at the output end of the servo motor, a rack is arranged on the partition plate 8, the gear is meshed with the rack, a guide shaft is arranged on the partition plate 8, a guide hole matched with the guide shaft is formed in the furnace body 1, and the guide shaft is arranged in the guide hole in a sliding mode.
A blocking net 10 for preventing tanning sludge from falling to the ash reduction chamber 4 is arranged in the incineration chamber 3, and the blocking net 10 is positioned between the conveying pipeline 7 and the blocking mechanism.
The first pipeline 5 is provided with a first fan 11.
A second pipeline 12 is communicated between the incineration chamber 3 and the ash reduction chamber 4, and a second fan 15 and a dust removing device 13 are arranged on the second pipeline 12.
The second pipeline 12 is provided with a desulfurization device 14.
The pyrolysis chamber 2, the incineration chamber 3 and the ash reduction chamber 4 are sequentially arranged from top to bottom.
The treatment method of the tanning sludge pyrolysis incinerator with the chromium oxidation inhibiting function comprises the following steps of:
s1, directly entering the leather making sludge to be incinerated into an incineration chamber 3 through a feeding port 101 after being dried, mixing the leather making sludge with a combustible medium conveyed by a conveying pipeline 7, and incinerating at a high temperature, wherein the temperature range of the incineration chamber 3 is 400-1000 ℃;
s2, drying another batch of leather making sludge to be incinerated, and then enabling the leather making sludge to enter a pyrolysis chamber 2 through a feed inlet 101 for pyrolysis;
s3, introducing pyrolysis gas after pyrolysis into the ash reduction chamber 4 through a first pipeline 5 and contacting with incineration ash;
s4, introducing the pyrolyzed tanning sludge in the incineration chamber 3 into the incineration chamber 3 through a partition mechanism.
Wherein the temperature of the pyrolysis chamber 2 in the step S2 ranges from 200 ℃ to 400 ℃ and the pyrolysis time ranges from 10min to 20min, and when the air pressure in the pyrolysis chamber 2 is higher than 101.325kPa, the pyrolysis gas is conveyed to the ash reduction chamber 4 through the first pipeline 5.
Wherein the residence time of the tanning sludge after pyrolysis in the step S4 in the incineration chamber 3 and the residence time of the incineration ash in the ash reduction chamber 4 are all 10-20 min.
When the tanning sludge pyrolysis incinerator with the chromium oxidation inhibiting function and the treatment method thereof are used, the tanning sludge pyrolysis incinerator is started up: the leather making sludge after drying enters the pyrolysis chamber 2 through the feeding port 101, and the pyrolysis chamber 2 cannot normally operate because the incineration chamber 3 is not ignited and started, so that the leather making sludge in the pyrolysis chamber 2 directly enters the incineration chamber 3 by opening the partition plate 8 between the pyrolysis chamber 2 and the incineration chamber 3, the incineration is started in the incineration chamber 3 by supplementing the natural gas ignition mode, meanwhile, the leather making sludge in the second batch enters the pyrolysis chamber 2, the pyrolysis chamber 2 and the incineration chamber 3 are separated and sealed through the partition plate 8, the leather making sludge in the pyrolysis chamber 2 starts to be pyrolyzed under the heat and the temperature provided by the incineration chamber 3, part ash residues in the incineration process of the leather making sludge in the first batch in the incineration chamber 3 fall into the ash chamber to be stored, and the pyrolysis incinerator is started successfully.
The operation stage of the tanning sludge pyrolysis incinerator: under the conditions of temperature and heat provided by the incineration section, the temperature of the pyrolysis chamber 2 is controlled below 400 ℃ at the highest, the tanning sludge is further dehydrated and decomposed, substances such as alkane, alkene and the like are released in the pyrolysis process, the pressure in the pyrolysis chamber 2 is increased along with the increase of released pyrolysis gas, a gas pressure switch is triggered, a fan is started, the pyrolysis gas in the pyrolysis chamber 2 is pumped into an ash chamber, the bottom of the ash chamber runs from bottom to top, and the pyrolysis gas is in countercurrent contact with incineration ash in the ash chamber and stays for more than 10-20 min;
after pyrolysis of the pyrolysis chamber 2 is finished, a sealing port between the pyrolysis chamber 2 and the incineration chamber 3 is opened, pyrolysis tanning sludge enters the incineration chamber 3 to start incineration, meanwhile, the pyrolysis chamber 2 is sealed by controlling the partition plate 8, next batch of tanning sludge is put into the pyrolysis chamber 3 to carry out pyrolysis, natural gas is introduced as auxiliary fuel under the blocking of the two layers of blocking nets 10 to carry out full combustion, the blocking nets 10 are knocked by a mechanical shaking device to ensure full oxygenation and complete combustion in the combustion process, and the completely combusted tanning sludge falls into the bottom of the incineration chamber 3 through a screen mesh and enters an ash chamber through the blocking net between the incineration chamber 3 and the ash chamber;
the flue gas generated in the incineration process of the incineration chamber 3 contains more particles, sulfur oxides, nitrogen oxides and the like, after being led out through the second pipeline 12 at the upper part of the incineration chamber 3, the flue gas is firstly collected by a bag-type dust collector and then is subjected to sulfur oxide and nitrogen oxides removal by a desulfurizing tower and a denitration device, and the dust of the particles collected by the bag can be manually led into an ash chamber to be gasified and reduced together with incineration ash by pyrolysis gas, so that harmless treatment of fly ash is completed.
The above-described preferred embodiments according to the present invention are intended to suggest that, from the above description, various changes and modifications can be made by the worker in question without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (9)
1. The utility model provides a tanning mud pyrolysis incinerator that possesses inhibition chromium oxidation function, includes furnace body (1), be provided with feed inlet (101) and slag tap (102) on furnace body (1) respectively, its characterized in that: the furnace body (1) is internally provided with a pyrolysis chamber (2), an incineration chamber (3) and an ash reduction chamber (4), the pyrolysis chamber (2) is used for drying and pyrolyzing leather making sludge under the condition of isolating air, a feeding port (101) is communicated with the pyrolysis chamber (2), a partition mechanism is arranged between the pyrolysis chamber (2) and the incineration chamber (3), the partition mechanism is used for connecting or sealing and partitioning the pyrolysis chamber (2) and the incineration chamber (3), leather making sludge in the pyrolysis chamber (2) enters the incineration chamber (3) or the pyrolysis chamber (2) is partitioned and sealed, the incineration chamber (3) and the ash reduction chamber (4) are mutually communicated, the incineration chamber (3) is positioned between the pyrolysis chamber (2) and the ash reduction chamber (4), a slag discharging port (102) is communicated with the ash reduction chamber (4), a first pipeline (5) which is mutually communicated is arranged between the pyrolysis chamber (2) and the ash reduction chamber (4), a valve (6) used for opening and closing is arranged on the first pipeline (5), and a combustion medium (7) is arranged in the combustion pipeline (7);
the first pipeline (5) is provided with a first fan (11) and is used for generating a large amount of pyrolysis gas in the pyrolysis chamber (2) and guiding the pyrolysis gas into the ash reduction chamber (4), so that hexavalent chromium in ash is reduced into trivalent chromium by the pyrolysis gas under the action of pyrolysis atmosphere at the self temperature of the ash, and meanwhile, the pyrolysis gas enters the incineration chamber (3) upwards after staying in the ash reduction chamber (4) and is discharged after being incinerated together with a combustible medium.
2. The tanning sludge pyrolysis incinerator with chromium oxidation inhibition function according to claim 1, characterized in that: partition mechanism includes baffle (8) and actuating mechanism (9), be provided with the spout on furnace body (1) between pyrolysis chamber (2) and incineration chamber (3), baffle (8) and spout assorted, baffle (8) slip setting is in the spout, actuating mechanism (9) set up on furnace body (1), the output of actuating mechanism (9) sets up on baffle (8).
3. The tanning sludge pyrolysis incinerator with chromium oxidation inhibition function according to claim 1, characterized in that: a blocking net (10) for preventing tanning sludge from falling to the ash reduction chamber (4) is arranged in the incineration chamber (3), and the blocking net (10) is positioned between the conveying pipeline (7) and the blocking mechanism.
4. The tanning sludge pyrolysis incinerator with chromium oxidation inhibition function according to claim 1, characterized in that: a second pipeline (12) is communicated between the incineration chamber (3) and the ash reduction chamber (4), and a second fan (15) and a dust removal device (13) are arranged on the second pipeline (12).
5. The tanning sludge pyrolysis incinerator with chromium oxidation inhibition function according to claim 4, wherein: the second pipeline (12) is provided with a desulfurization device (14).
6. The tanning sludge pyrolysis incinerator with chromium oxidation inhibition function according to claim 1, characterized in that: the pyrolysis chamber (2), the incineration chamber (3) and the ash reduction chamber (4) are sequentially arranged from top to bottom.
7. A method for treating a tanning sludge pyrolysis incinerator having a chromium oxidation inhibiting function according to any one of claims 1 to 6, comprising the steps of:
s1, directly entering leather making sludge to be incinerated into an incineration chamber (3) through a feed inlet (101) after being dried, mixing the leather making sludge with a combustible medium conveyed by a conveying pipeline (7) and incinerating at a high temperature, wherein the temperature of the incineration chamber (3) is in a range of 400-1000 ℃;
s2, drying another batch of leather making sludge to be incinerated, and then enabling the leather making sludge to enter a pyrolysis chamber (2) through a feed inlet (101) for pyrolysis;
s3, introducing pyrolysis gas after pyrolysis into an ash reduction chamber (4) through a first pipeline (5) and contacting with incineration ash;
s4, introducing the pyrolyzed tanning sludge in the incineration chamber (3) into the incineration chamber (3) through a partition mechanism.
8. The method for treating a tanning sludge pyrolysis incinerator having a chromium oxidation inhibition function according to claim 7, characterized in that: wherein in the step S2, the temperature of the pyrolysis chamber (2) ranges from 200 ℃ to 400 ℃, the pyrolysis time ranges from 10min to 20min, and when the air pressure in the pyrolysis chamber (2) is higher than 101.325kPa, the pyrolysis gas is conveyed to the ash reduction chamber (4) through the first pipeline (5).
9. The method for treating a tanning sludge pyrolysis incinerator having a chromium oxidation inhibition function according to claim 7 or 8, characterized by: wherein the residence time of the tanning sludge after pyrolysis in the step S4 in the incineration chamber (3) and the residence time of the incineration ash in the ash reduction chamber (4) are all 10-20 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111541155.2A CN114251669B (en) | 2021-12-16 | 2021-12-16 | Tanning sludge pyrolysis incinerator with chromium oxidation inhibiting function and treatment method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111541155.2A CN114251669B (en) | 2021-12-16 | 2021-12-16 | Tanning sludge pyrolysis incinerator with chromium oxidation inhibiting function and treatment method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114251669A CN114251669A (en) | 2022-03-29 |
| CN114251669B true CN114251669B (en) | 2023-11-17 |
Family
ID=80792595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111541155.2A Active CN114251669B (en) | 2021-12-16 | 2021-12-16 | Tanning sludge pyrolysis incinerator with chromium oxidation inhibiting function and treatment method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114251669B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642139A (en) * | 2017-02-20 | 2017-05-10 | 长沙超梵环境科技有限公司 | Domestic refuse pyrolysis and gasification and fly ash direct melting device and use method thereof |
| CN106824979A (en) * | 2017-01-04 | 2017-06-13 | 长沙汇聚环境技术有限公司 | A kind of cooperative disposal method of Cr VI slag and biomass castoff |
| CN207849376U (en) * | 2018-01-08 | 2018-09-11 | 修武永乐新能源环保设备有限公司 | A kind of paint can and paint Slag treatment device |
| CN110848701A (en) * | 2019-11-14 | 2020-02-28 | 陕西润和环保科技有限公司 | Internal heating type garbage gasification incinerator device |
| CN112728557A (en) * | 2021-01-12 | 2021-04-30 | 河南科技大学 | Medical waste pyrolysis incinerator |
-
2021
- 2021-12-16 CN CN202111541155.2A patent/CN114251669B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106824979A (en) * | 2017-01-04 | 2017-06-13 | 长沙汇聚环境技术有限公司 | A kind of cooperative disposal method of Cr VI slag and biomass castoff |
| CN106642139A (en) * | 2017-02-20 | 2017-05-10 | 长沙超梵环境科技有限公司 | Domestic refuse pyrolysis and gasification and fly ash direct melting device and use method thereof |
| CN207849376U (en) * | 2018-01-08 | 2018-09-11 | 修武永乐新能源环保设备有限公司 | A kind of paint can and paint Slag treatment device |
| CN110848701A (en) * | 2019-11-14 | 2020-02-28 | 陕西润和环保科技有限公司 | Internal heating type garbage gasification incinerator device |
| CN112728557A (en) * | 2021-01-12 | 2021-04-30 | 河南科技大学 | Medical waste pyrolysis incinerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114251669A (en) | 2022-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105509062B (en) | Full-scale continuous pyrolysis incineration device for electronic and electric appliance wastes | |
| KR100823747B1 (en) | Method and device for combustion of solid fuel, especially solid waste | |
| CN112050221A (en) | Waste incineration system with pyrolysis gasification | |
| CN2795672Y (en) | Three burning type burning processing system for liquid and solid waste materials | |
| CN205316333U (en) | Full-scale continuous pyrolysis incineration device for electronic and electric appliance wastes | |
| CN210291891U (en) | Purify waste incinerator of dioxin flue gas | |
| CN114251669B (en) | Tanning sludge pyrolysis incinerator with chromium oxidation inhibiting function and treatment method thereof | |
| JP4626875B2 (en) | Low pollution incineration equipment | |
| CN206055638U (en) | For the cracking incinerator of waste process of endangering | |
| CN1782497A (en) | Incinerator for medical garbage | |
| CN212565792U (en) | Waste incineration system with pyrolysis gasification | |
| CN105782983B (en) | A kind of exhaust gas recycled for multiple times type waste disposal method | |
| CN111076180B (en) | High-low temperature variable gas speed waste incineration system and method thereof | |
| CN2788024Y (en) | Clean coal combustion furnace | |
| CN219607094U (en) | Oxyhydrogen flame incinerator for household garbage | |
| KR20010017060A (en) | Rotary kiln incineration system | |
| CN108469028A (en) | A kind of equipment using Brown Gas burning domestic garbage | |
| CN219809908U (en) | Garbage incinerator with U-shaped structure and conical closing-in exhaust port | |
| CN2544191Y (en) | Incinerator treatment system for industrial dangerous waste | |
| CN113578933B (en) | Elementary self-circulation treatment system for household garbage | |
| KR200146872Y1 (en) | A trash burner | |
| CN220669453U (en) | Environmental protection smokeless desk-top remains cremator | |
| RU2229060C2 (en) | Oil-slime heat treatment installation | |
| CN110296416B (en) | Carbonization incinerator for treating solid waste materials and working method thereof | |
| CN218209580U (en) | Garbage incinerator for treating medical and domestic garbage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |