CN113028408A - Process and device for treating solid waste by high-temperature steam pyrolysis - Google Patents
Process and device for treating solid waste by high-temperature steam pyrolysis Download PDFInfo
- Publication number
- CN113028408A CN113028408A CN202110340486.3A CN202110340486A CN113028408A CN 113028408 A CN113028408 A CN 113028408A CN 202110340486 A CN202110340486 A CN 202110340486A CN 113028408 A CN113028408 A CN 113028408A
- Authority
- CN
- China
- Prior art keywords
- steam
- pyrolysis
- temperature
- gas
- pyrolysis furnace
- 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.)
- Pending
Links
- 239000002910 solid waste Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 title claims abstract description 21
- 238000002352 steam pyrolysis Methods 0.000 title claims abstract description 16
- 238000000197 pyrolysis Methods 0.000 claims abstract description 132
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000000428 dust Substances 0.000 claims abstract description 21
- 239000012265 solid product Substances 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 57
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 17
- 239000003546 flue gas Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000000498 cooling water Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 238000009270 solid waste treatment Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 description 9
- 239000002699 waste material Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 239000000178 monomer Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010813 municipal solid waste Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 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
- 239000006227 byproduct Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 239000003433 contraceptive agent Substances 0.000 description 1
- 230000002254 contraceptive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- -1 i.e. Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- 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
- F23G5/0276—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage using direct heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
-
- 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
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/30—Pyrolysing
- F23G2201/304—Burning pyrosolids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
- F23J2217/104—High temperature resistant (ceramic) type
-
- 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
- Y02E20/12—Heat utilisation in combustion or incineration of waste
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a process and a device for treating solid waste by high-temperature steam pyrolysis, wherein the solid waste is pretreated and then enters a pyrolysis furnace directly heated by high-temperature superheated steam for pyrolysis, a solid product generated by pyrolysis is cooled and then recovered, pyrolysis gas generated by pyrolysis enters a condenser along with the high-temperature steam, the pyrolysis gas obtained by heat exchange of the condenser is combusted, heat is recovered and dust is removed for discharge, condensate water obtained by heat exchange of the condenser is recovered into a steam generator, the obtained hot water is directly recovered into the steam generator, redundant hot water is discharged, feed water entering the steam generator is heated to form steam, and then the steam enters a steam superheater and is heated to form high-temperature superheated steam which is supplied to the pyrolysis furnace. The scheme of the invention can lead the solid waste to be directly contacted with high-temperature steam, has high heat exchange efficiency, is full of water vapor in the pyrolysis furnace, is easy to realize the anaerobic environment in the pyrolysis furnace, and greatly dilutes the concentration of pyrolysis gas, thereby reducing the safety risk of equipment.
Description
Technical Field
The invention relates to the field of solid waste pyrolysis treatment, in particular to a process and a device for treating solid waste by high-temperature steam pyrolysis.
Background
Solid waste, i.e., solid waste, refers to solid, semi-solid and articles, materials placed in containers that are discarded or discarded without losing their original value of use generated during manufacturing, life and other activities, and articles, materials regulated by law and administrative laws and regulations for inclusion in the management of solid waste, which are generally classified as solid waste management systems due to their great harmfulness. With the rapid development of economy, the environmental pollution caused by solid waste is becoming serious, and the problem of solid waste treatment has become a problem of general attention in all social circles.
The solid waste disposal follows the principle of 'reduction, resource and harmlessness', wherein the first principle is 'harmlessness'. The harmless treatment of the solid waste means that the solid waste or harmful components in the solid waste cannot harm the environment or are converted into substances harmless to the environment through proper treatment or disposal, and the disposal process is the harmless treatment of the solid waste. Typical disposal methods are landfill, composting, incineration and pyrolysis. The pyrolysis technology not only can realize harmless treatment, reduction and recycling of the garbage, but also can effectively overcome the problem of dioxin pollution generated by garbage incineration, thereby becoming a solid waste treatment technology with a larger development prospect. For example, patents such as "an anaerobic cracking treatment device for domestic garbage" with publication number CN111826176A, "a waste salt vacuum cracking system" with publication number CN111117668A, "an industrial waste salt treatment system" with patent number CN207222538U all report pyrolysis technology, so that organic harmful substances in solid waste are pyrolyzed under high temperature conditions. In the techniques of these patents, indirect heating is adopted to prevent the pollutants from reacting to generate secondary pollutants after contacting with air at high temperature. However, this heating method has the following disadvantages: 1. the sealing requirement is high, once combustible gas generated by cracking leaks, secondary pollution and even explosion accidents are easily caused, and particularly high risk and high cost are brought to continuous feeding and discharging processing equipment. 2. The heat transfer efficiency is low, so that the temperature of the organic harmful substances does not reach the pyrolysis temperature, and the content of the residual organic components is difficult to control.
Therefore, it is a subject of great attention to find a process and an apparatus for harmless treatment of solid waste, which can overcome the defects of the current solid waste treatment method.
Disclosure of Invention
The technical scheme adopted by the invention for solving the technical problems is as follows: a process for treating solid waste by high-temperature steam pyrolysis comprises the following steps:
the pretreated solid waste enters a pyrolysis furnace directly heated by high-temperature superheated steam for pyrolysis under the action of a feeding device;
cooling and recovering harmless solid products generated by pyrolysis, and feeding pyrolysis gas generated by pyrolysis into a condenser along with high-temperature steam;
pyrolysis gas obtained after heat exchange of the condenser is discharged after combustion, heat recovery and dust removal; the condensed water obtained after heat exchange of the condenser is purified and then recycled into the steam generator, the obtained hot water is directly recycled into the steam generator, and redundant hot water is discharged;
the feed water entering the steam generator is heated into steam, and then enters the steam superheater to be heated into high-temperature superheated steam which is supplied to the pyrolysis furnace.
Further, the preferred method is that the temperature of the high-temperature superheated steam supplied to the pyrolysis furnace is 700-.
Further, the preferred method is that the pyrolysis gas and the air are mixed and then combusted to generate the high-temperature flue gas with the temperature of 800-.
Further, the preferred method is that the high-temperature flue gas is sequentially heated by a steam superheater and a steam generator.
Further, the preferred method is as follows:
s1, feeding the pretreated solid waste into a pyrolysis furnace from the top of the pyrolysis furnace under the action of a feeding device, feeding high-temperature superheated steam into the pyrolysis furnace from the side surface of the bottom of the pyrolysis furnace, and directly heating the solid waste by the high-temperature superheated steam to generate pyrolysis gas and harmless solid products;
s2, discharging harmless solid products in the pyrolysis furnace into a cooler through the bottom of the pyrolysis furnace, and recovering the products after cooling;
s3, pyrolysis gas generated in the pyrolysis furnace enters a condenser through the side face of the upper part of the pyrolysis furnace along with high-temperature steam, mixed gas is condensed to obtain pyrolysis gas and condensate water, the pyrolysis gas is used as a heat source after being completely combusted and is sequentially sent to a steam superheater and a steam generator, tail gas is removed after heat recovery for treatment, the condensate water is recovered into the steam generator after being subjected to purification treatment, meanwhile, cooling water is heated into hot water after heat exchange, part of the hot water is recovered into the steam generator, and excess hot water is discharged;
s4, heating the feed water entering the steam generator by high-temperature flue gas to form steam, heating the steam by the high-temperature flue gas to form high-temperature superheated steam, and supplying the high-temperature superheated steam to the pyrolysis furnace.
The invention also discloses a high-temperature steam pyrolysis treatment solid waste device, which comprises a pyrolysis furnace (1), a cooler (2), a steam superheater (3), a steam generator (4), condensed water purification equipment (5), a condenser (6), a combustor (7), a bag-type dust remover (8) and a fan (9);
a discharge hole of the pyrolysis furnace (1) is connected with a feed hole of the cooler (2), and a pyrolysis harmless solid product is directly discharged through the discharge hole of the cooler (2);
an exhaust port of the pyrolysis furnace (1) is connected with an air inlet of the condenser (6);
cooling water is introduced into the condenser (6) through a water inlet, an air outlet of the condenser (6) is connected with an air inlet of the combustor (7), a condensed water outlet of the condenser (6) is connected with a water inlet of the condensed water purifying equipment (5), and a cooling water outlet of the condenser (6) is connected with a water inlet of the steam generator (4);
the water outlet of the condensed water purifying device (5) is connected with the water inlet of the steam generator (4);
the steam outlet of the steam generator (4) is connected with the steam inlet of the steam superheater (3);
a steam outlet of the steam superheater (3) is connected with an air inlet of the pyrolysis furnace (2);
pyrolysis gas and air mixed gas are introduced into the gas inlet of the combustor (7), and the gas outlet of the combustor (7) is connected with the gas inlet of the steam superheater (3);
the air outlet of the steam superheater (3) is connected with the air inlet of the steam generator (4);
the gas outlet of the steam generator (4) is connected with the gas inlet of the bag-type dust collector (8), the gas outlet of the bag-type dust collector (8) is connected with the gas inlet of the fan (9), and the flue gas is discharged through the gas outlet of the fan (9).
Further, the preferred structure is that the pyrolysis furnace (1) comprises a pyrolysis furnace body (10) and a plurality of layers of detachable tower plates (12), a central shaft (11) is erected in the pyrolysis furnace body, a plurality of stirring arms (13) are annularly arranged on the outer wall of the central shaft (11), one end of the central shaft (11) is driven to rotate by a transmission motor (15) arranged outside the pyrolysis furnace body (10), the stirring arms are hinged with a plurality of rake blades (14), and the tower plates are provided with a plurality of tower plate holes (16).
Further, the preferable structure is that the central shaft is composed of a plurality of sections of monomer structures which can be mutually connected, and the connection mode among the monomer structures is one of clamping connection or bolt connection.
Further, the preferable structure is that the connection mode between one end of the stirring arm and the outer wall of the central shaft is one of clamping connection or threaded connection.
Further, the preferable structure is that the bag-type dust collector is an electrically heated bag-type dust collector.
Compared with the prior art, the solid waste treatment process and device by high-temperature steam pyrolysis have the following beneficial effects:
1. the solid waste in the pyrolysis furnace directly contacts with steam for heat exchange, and the heat transfer efficiency is greatly improved by matching with the stirring action of the stirring arm, so that the organic harmful substances in the solid waste are easily heated to the pyrolysis temperature, and the content of residual organic components can be effectively controlled;
2. the residence time of the solid waste in the pyrolysis furnace can be adjusted by adjusting the rotating speed and the number of tower plates of the transmission motor, so that the solid waste adaptability of the pyrolysis device is improved;
3. the concentration of pyrolysis gas generated by pyrolysis is diluted by a large amount of steam in the pyrolysis furnace, so that the safety risk of equipment is greatly reduced;
4. the superheated steam does not contain oxygen, so that an anaerobic environment in the pyrolysis furnace can be kept during pyrolysis, and the solid waste can be subjected to anaerobic continuous pyrolysis;
5. the water discharged from the condenser is used as the water supply of the steam generator, so that the water is recycled, the consumption of fresh water is saved, the generation amount of waste water is reduced, and the heat of high-temperature steam discharged from a high-temperature steam outlet of the pyrolysis furnace is fully utilized;
6. the pyrolysis gas heats for steam superheater and steam generator in proper order after the burning, has effectively utilized the heat of high temperature flue gas, has also reduced the input of extra energy.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic process flow diagram of the solid waste high-temperature steam pyrolysis treatment of the present invention;
FIG. 2 is a schematic view of the structure of a pyrolysis furnace;
FIG. 3 is a schematic structural view of a tray;
the labels in the figure are: 1 is the pyrolysis oven, 2 is the cooler, 3 is steam superheater, 4 is steam generator, 5 is comdenstion water clarification plant, 6 is the condenser, 7 is the combustor, 8 is the sack cleaner, 9 is the fan, 10 is the pyrolysis oven furnace body, 11 is the center pin, 12 is the column plate, 13 is the rabbling arm, 14 is the harrow leaf, 15 is driving motor, 16 is the column plate hole.
Detailed Description
The following is a detailed description of specific embodiments of the technical solution of the present invention, but the present invention is not limited to the following description:
as shown in fig. 1 to 3, the present invention provides a process apparatus for high temperature steam pyrolysis treatment of solid waste, comprising a pyrolysis furnace 1, a cooler 2, a steam superheater 3, a steam generator 4, a condensed water purification device 5, a condenser 6, a burner 7, a bag-type dust remover 8, and a fan 9;
a discharge hole of the pyrolysis furnace 1 is connected with a feed hole of the cooler 2, and pyrolysis harmless products are directly discharged through the discharge hole of the cooler 2;
the exhaust port of the pyrolysis furnace 1 is connected with the air inlet of the condenser 6;
cooling water is introduced into the condenser 6 through a water inlet, an air outlet of the condenser 6 is connected with an air inlet of the combustor 7, a condensed water outlet of the condenser 6 is connected with a water inlet of the condensed water purifying device 5, and a cooling water outlet of the condenser 6 is connected with a water inlet of the steam generator 4;
the water outlet of the condensed water purifying device 5 is connected with the water inlet of the steam generator 4;
the steam outlet of the steam generator 4 is connected with the steam inlet of the steam superheater 3;
a steam outlet of the steam superheater 3 is connected with an air inlet of the pyrolysis furnace 2;
pyrolysis gas and air mixed gas are introduced into the gas inlet of the combustor 7, and the gas outlet of the combustor 7 is connected with the gas inlet of the steam superheater 3;
the air outlet of the steam superheater 3 is connected with the air inlet of the steam generator 4;
the air outlet of the steam generator 4 is connected with the air inlet of the bag-type dust collector 8;
the air outlet of the bag-type dust collector 8 is connected with the air inlet of the fan 9, and the flue gas is discharged through the air outlet of the fan 9;
pyrolysis oven (1) can dismantle column tray (12) including pyrolysis oven furnace body (10) and multilayer, erects center pin (11) in the pyrolysis oven furnace body, the outer wall of center pin (11) is fitted with a contraceptive ring and is equipped with a plurality of rabbling arms (13), just the one end of center pin (11) is through setting up the outer driving motor (15) drive of pyrolysis oven furnace body (10) is rotatory, articulated a plurality of harrow leaves (14) on the rabbling arm, it has a plurality of column tray holes (16) to open on the column tray, plays to leak material and gas leakage, leaks the effect of high temperature steam.
The invention provides a process method for treating solid waste by high-temperature steam pyrolysis, which comprises the following steps:
s1, feeding the pretreated solid waste into a pyrolysis furnace from the top of the pyrolysis furnace under the action of a feeding device, feeding high-temperature superheated steam into the pyrolysis furnace from the side surface of the bottom of the pyrolysis furnace, and directly heating the solid waste by the high-temperature superheated steam to generate pyrolysis gas and harmless solid products;
s2, discharging harmless solid products in the pyrolysis furnace into a cooler through the bottom of the pyrolysis furnace, and recovering the products after cooling;
s3, pyrolysis gas generated in the pyrolysis furnace enters a condenser through the side face of the upper part of the pyrolysis furnace along with high-temperature superheated steam, mixed gas is condensed to obtain pyrolysis gas and condensate water, the pyrolysis gas is used as a heat source after being completely combusted and is sequentially sent to a steam superheater and a steam generator, tail gas is removed after heat recovery for treatment, the condensate water is recovered into the steam generator after being subjected to purification treatment, meanwhile, cooling water is heated into hot water after heat exchange, part of the hot water is recovered into the steam generator, and excess hot water is discharged;
s4, heating the feed water entering the steam generator by high-temperature flue gas to form steam, heating the steam by the high-temperature flue gas to form high-temperature superheated steam, and supplying the high-temperature superheated steam to the pyrolysis furnace.
In step 3, the temperature of the high-temperature steam discharged from the pyrolysis furnace is higher than 150 ℃.
In the step 3, the burner burns by mixing pyrolysis gas and air, when the amount of the pyrolysis gas is insufficient, natural gas needs to be supplemented, and the heat carried by the flue gas from the burner is ensured to meet the consumption of the steam superheater and the steam generator.
In step 4, the initial feed water to the steam generator is fresh water.
The central shaft is composed of a plurality of sections of monomer structures which can be mutually connected, and the connection mode among the monomer structures is one of clamping connection or bolt connection.
The connection mode between one end of the stirring arm and the outer wall of the central shaft is one of clamping connection or threaded connection.
The bag-type dust remover is an electric heating bag-type dust remover, so that water vapor carried by smoke entering the bag-type dust remover is prevented from condensing to cause the bag-type dust remover to be stuck.
The working principle of the invention is as follows: the invention can adopt a large amount of byproduct waste salt containing toxic and harmful chemical substances generated in the production process of fine chemical industry, chemical pesticide products or intermediates as raw materials. Under the condition that the pyrolysis furnace is filled with high-temperature steam, a transmission motor 15 is started, waste salt continuously enters a first layer of tower plate 10 on the upper part of the pyrolysis furnace from the top of the pyrolysis furnace, a stirring arm 13 with a rake blade 14 rotates to continuously turn over and copy the waste salt, and the waste salt is pushed into a tower plate hole 16 and then falls onto the next layer of tower plate. In the falling process of the waste salt, the waste salt is continuously in direct contact heat exchange with high-temperature steam entering from the bottom of the pyrolysis furnace, organic harmful substances in the waste salt are fully pyrolyzed, harmless solid products generated by pyrolysis are discharged to a cooler 2 from the bottom of the pyrolysis furnace, pyrolysis gas generated by pyrolysis is discharged into a condenser 6 from the top of the pyrolysis furnace along with the high-temperature steam, the pyrolysis gas obtained by separation in the condenser enters a burner 7, high-temperature flue gas is generated by full combustion, the high-temperature flue gas sequentially supplies a steam superheater 3 and a steam generator for heat exchange 4, dust removal is performed to reach the emission standard, the high-temperature steam is condensed into condensate water, the condensate water is recycled into a steam generator 4 after purification treatment, cooling water becomes hot water after heat exchange through the condenser 6, part of the hot water is recycled into the steam generator 4, excessive hot water is discharged, and water entering the steam generator 4 becomes steam, the steam is heated by the steam superheater 3 to become high-temperature superheated steam, and the high-temperature superheated steam is supplied to the pyrolysis furnace 1.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A process for treating solid waste by high-temperature steam pyrolysis is characterized by comprising the following steps:
the pretreated solid waste enters a pyrolysis furnace directly heated by high-temperature superheated steam for pyrolysis under the action of a feeding device;
cooling and recovering a solid product generated by pyrolysis, and feeding pyrolysis gas generated by pyrolysis into a condenser along with high-temperature steam;
pyrolysis gas obtained after heat exchange of the condenser is discharged after combustion, heat recovery and dust removal; the condensed water obtained after heat exchange of the condenser is purified and then recycled into the steam generator, the obtained hot water is directly recycled into the steam generator, and redundant hot water is discharged;
the feed water entering the steam generator is heated into steam, and then enters the steam superheater to be heated into high-temperature superheated steam which is supplied to the pyrolysis furnace.
2. The process as claimed in claim 1, wherein the temperature of the superheated steam supplied to the pyrolysis furnace is 700 ℃ and the temperature of the high-temperature steam discharged from the pyrolysis furnace is 150 ℃ and 250 ℃.
3. The process as claimed in claim 1, wherein the pyrolysis gas is mixed with air to generate high temperature flue gas at 800-.
4. The process of claim 3, wherein the high temperature flue gas is sequentially heated by a steam superheater and a steam generator.
5. The process for high-temperature steam pyrolysis treatment of solid waste according to claim 1, characterized in that the specific method is as follows:
s1, feeding the pretreated solid waste into a pyrolysis furnace from the top of the pyrolysis furnace under the action of a feeding device, feeding high-temperature superheated steam into the pyrolysis furnace from the side surface of the bottom of the pyrolysis furnace, and directly heating the solid waste by the high-temperature superheated steam to generate pyrolysis gas and harmless solid products;
s2, discharging harmless solid products in the pyrolysis furnace into a cooler through the bottom of the pyrolysis furnace, and recovering the products after cooling;
s3, pyrolysis gas generated in the pyrolysis furnace enters a condenser through the side face of the upper part of the pyrolysis furnace along with high-temperature superheated steam, mixed gas is condensed to obtain pyrolysis gas and condensate water, the pyrolysis gas is used as a heat source after being completely combusted and is sequentially sent to a steam superheater and a steam generator, tail gas is removed after heat recovery for treatment, the condensate water is recovered into the steam generator after being subjected to purification treatment, meanwhile, cooling water is heated into hot water after heat exchange, part of the hot water is recovered into the steam generator, and excess hot water is discharged;
s4, heating the feed water entering the steam generator by high-temperature flue gas to form steam, heating the steam by the high-temperature flue gas to form high-temperature superheated steam, and supplying the high-temperature superheated steam to the pyrolysis furnace.
6. A process unit for treating solid waste by high-temperature steam pyrolysis is characterized by comprising a pyrolysis furnace (1), a cooler (2), a steam superheater (3), a steam generator (4), a condensed water purifier (5), a condenser (6), a burner (7), a bag-type dust remover (8) and a fan (9);
a discharge hole of the pyrolysis furnace (1) is connected with a feed hole of the cooler (2), and a pyrolysis harmless solid product is directly discharged through the discharge hole of the cooler (2);
an exhaust port of the pyrolysis furnace (1) is connected with an air inlet of the condenser (6);
cooling water is introduced into the condenser (6) through a water inlet, an air outlet of the condenser (6) is connected with an air inlet of the combustor (7), a condensed water outlet of the condenser (6) is connected with a water inlet of the condensed water purifier (5), and a cooling water outlet of the condenser (6) is connected with a water inlet of the steam generator (4);
the water outlet of the condensed water purifier (5) is connected with the water inlet of the steam generator (4);
the steam outlet of the steam generator (4) is connected with the steam inlet of the steam superheater (3);
a steam outlet of the steam superheater (3) is connected with an air inlet of the pyrolysis furnace (2);
pyrolysis gas and air mixed gas are introduced into the gas inlet of the combustor (7), and the gas outlet of the combustor (7) is connected with the gas inlet of the steam superheater (3);
the air outlet of the steam superheater (3) is connected with the air inlet of the steam generator (4);
the gas outlet of the steam generator (4) is connected with the gas inlet of the bag-type dust collector (8), the gas outlet of the bag-type dust collector (8) is connected with the gas inlet of the fan (9), and the flue gas is discharged through the gas outlet of the fan (9).
7. The process device for high-temperature steam pyrolysis treatment of solid waste is characterized in that the pyrolysis furnace (1) comprises a pyrolysis furnace body (10) and a plurality of layers of detachable trays (12), a central shaft (11) is erected in the pyrolysis furnace body, a plurality of stirring arms (13) are arranged on the outer wall of the central shaft (11), one end of the central shaft (11) is driven to rotate by a transmission motor (15) arranged outside the pyrolysis furnace body (10), a plurality of rake blades (14) are hinged on the stirring arms, and a plurality of tray holes (16) are formed in the trays.
8. The apparatus of claim 7, wherein the central shaft is composed of a plurality of segments of interconnected single structures, and the single structures are connected by one of clamping connection and bolt connection.
9. The process device for high-temperature steam pyrolysis solid waste treatment according to claim 8, wherein the connection mode between one end of the stirring arm and the outer wall of the central shaft is one of clamping connection or threaded connection.
10. The process unit for high-temperature steam pyrolysis treatment of solid waste according to claim 6, characterized in that the bag-type dust remover is an electrically heated bag-type dust remover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110340486.3A CN113028408A (en) | 2021-03-30 | 2021-03-30 | Process and device for treating solid waste by high-temperature steam pyrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110340486.3A CN113028408A (en) | 2021-03-30 | 2021-03-30 | Process and device for treating solid waste by high-temperature steam pyrolysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113028408A true CN113028408A (en) | 2021-06-25 |
Family
ID=76453011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110340486.3A Pending CN113028408A (en) | 2021-03-30 | 2021-03-30 | Process and device for treating solid waste by high-temperature steam pyrolysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113028408A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113831926A (en) * | 2021-10-13 | 2021-12-24 | 深圳市捷晶能源科技有限公司 | Anaerobic pyrolysis treatment device and method for printing ink slag |
| CN114349091A (en) * | 2021-12-29 | 2022-04-15 | 太原理工大学 | Pyrolysis treatment process for desulfurization waste liquid |
| CN114349090A (en) * | 2021-12-29 | 2022-04-15 | 太原理工大学 | Harmless treatment process for coking desulfurization waste liquid |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4708068A (en) * | 1986-08-20 | 1987-11-24 | Kabushiki Kaisha Komatsu Seisakusho | Fluidized-bed incineration equipment for removing organic substances |
| CN203927932U (en) * | 2014-03-04 | 2014-11-05 | 马振青 | Entirety solid waste gasification combined cycle system |
| CN104501173A (en) * | 2014-12-30 | 2015-04-08 | 杭州韦尔茂通环境技术有限公司 | Device and process for pyrolysis treatment on chemical-industry type solid waste and waste liquid |
| CN105157031A (en) * | 2015-08-31 | 2015-12-16 | 重庆丹霞节能科技有限公司 | Hazardous waste pyrolysis treatment process |
| CN205782974U (en) * | 2016-05-27 | 2016-12-07 | 上海第升环保科技有限公司 | A kind of pyrolytic incineration waste heat recovery device |
| US20170218274A1 (en) * | 2014-08-12 | 2017-08-03 | Shizheng YU | Waste Incinerator |
| CN107191937A (en) * | 2017-07-07 | 2017-09-22 | 大连理工大学 | A kind of external-heat is pyrolyzed combustion integrative device and method |
-
2021
- 2021-03-30 CN CN202110340486.3A patent/CN113028408A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4708068A (en) * | 1986-08-20 | 1987-11-24 | Kabushiki Kaisha Komatsu Seisakusho | Fluidized-bed incineration equipment for removing organic substances |
| CN203927932U (en) * | 2014-03-04 | 2014-11-05 | 马振青 | Entirety solid waste gasification combined cycle system |
| US20170218274A1 (en) * | 2014-08-12 | 2017-08-03 | Shizheng YU | Waste Incinerator |
| CN104501173A (en) * | 2014-12-30 | 2015-04-08 | 杭州韦尔茂通环境技术有限公司 | Device and process for pyrolysis treatment on chemical-industry type solid waste and waste liquid |
| CN105157031A (en) * | 2015-08-31 | 2015-12-16 | 重庆丹霞节能科技有限公司 | Hazardous waste pyrolysis treatment process |
| CN205782974U (en) * | 2016-05-27 | 2016-12-07 | 上海第升环保科技有限公司 | A kind of pyrolytic incineration waste heat recovery device |
| CN107191937A (en) * | 2017-07-07 | 2017-09-22 | 大连理工大学 | A kind of external-heat is pyrolyzed combustion integrative device and method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113831926A (en) * | 2021-10-13 | 2021-12-24 | 深圳市捷晶能源科技有限公司 | Anaerobic pyrolysis treatment device and method for printing ink slag |
| CN114349091A (en) * | 2021-12-29 | 2022-04-15 | 太原理工大学 | Pyrolysis treatment process for desulfurization waste liquid |
| CN114349090A (en) * | 2021-12-29 | 2022-04-15 | 太原理工大学 | Harmless treatment process for coking desulfurization waste liquid |
| CN114349090B (en) * | 2021-12-29 | 2023-08-15 | 太原理工大学 | Coking desulfurization waste liquid harmless treatment process |
| CN114349091B (en) * | 2021-12-29 | 2023-10-13 | 太原理工大学 | Pyrolysis treatment process for desulfurization waste liquid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113028408A (en) | Process and device for treating solid waste by high-temperature steam pyrolysis | |
| CN107971330B (en) | System and method for repairing ectopic thermal desorption of organic contaminated soil by efficiently utilizing waste heat | |
| CN109078976B (en) | Thermal desorption device, thermal desorption restoration system and contaminated soil thermal desorption restoration method | |
| CN107120656B (en) | Melting furnace for indirect thermal cracking and ash combustion and treatment method thereof | |
| CN103449701B (en) | Method and device for refinery sludge carbonization treatment and carbon recovery | |
| CN107774698B (en) | Anaerobic catalytic hot cracking system and method for waste batteries | |
| CN109351754A (en) | A kind of method and solid waste treatment system of solid waste processing | |
| CN105841160B (en) | A kind of organic matter self energizing is dried and pyrolysis, full constituent recycling system and process | |
| CN104876414A (en) | Method and device for pyrolytic carbonizing treatment of sludge | |
| CN104877690A (en) | Organic waste pyrolysis carbonization treatment method and device | |
| CN209550214U (en) | A kind of solid waste treatment system | |
| CN108911459A (en) | A kind of municipal sludge pyrolysis processing set technique and device | |
| CN211419939U (en) | Oily sludge treatment device | |
| CN113877940B (en) | Medical waste treatment process | |
| CN108728140B (en) | Organic hazardous waste low-temperature pyrolysis power generation system | |
| CN112062435B (en) | Oil sludge pyrolysis treatment device and process thereof | |
| CN110715299B (en) | Plasma torch medical waste treatment system and application method thereof | |
| CN112815329A (en) | Multi-process cooperative hazardous waste disposal and waste heat utilization system and method | |
| CN111978966A (en) | Oily sludge treatment system based on syllogic rotary kiln | |
| CN108467742B (en) | Sand desorption treatment method and device by utilizing flue gas indirect heating | |
| CN106675592B (en) | Indirect thermal desorption carbonization device and treatment method | |
| CN213746746U (en) | Harmless treatment equipment for hazardous waste | |
| CN205664385U (en) | Organic matter self -power is dry to divide resource system with pyrolysis, complete set | |
| CN112779057A (en) | Comprehensive oil sludge treatment system and comprehensive oil sludge treatment method | |
| CN215175077U (en) | Hazardous waste salt pyrolysis system |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210625 |