CN118324388A

CN118324388A - High-temperature thermal desorption process and system based on oil sludge solid waste treatment

Info

Publication number: CN118324388A
Application number: CN202410741415.8A
Authority: CN
Inventors: 张斌; 黄小云
Original assignee: Jiangsu Boyou Environmental Technology Co ltd
Current assignee: Jiangsu Boyou Environmental Technology Co ltd
Filing date: 2024-06-11
Publication date: 2024-07-12

Abstract

The invention discloses a high-temperature thermal desorption process and a system based on oil sludge solid waste treatment, comprising the following steps: s01, pretreatment: drying and mixing the oily solid waste to obtain mixed oil sludge; s02, heating treatment: and (3) inputting the mixed oil sludge into rotary pyrolysis equipment, and intermittently heating the mixed oil sludge at a preset temperature to obtain pyrolysis oil gas, water vapor and solid products. According to the high-temperature thermal desorption process and system based on the oil sludge solid waste treatment, the non-condensable gas generated by thermal desorption is subjected to acid removal treatment, then is mixed with the natural gas, and is combusted in the hot blast stove, so that the non-condensable gas is treated in a combustion manner, most of impurities are removed through combustion and then is discharged, and compared with the steps of treating the non-condensable gas, the method of purifying and then incinerating can save freedom, and the purifying effect is good.

Description

High-temperature thermal desorption process and system based on oil sludge solid waste treatment

Technical Field

The invention relates to the technical field of thermal desorption, in particular to a high-temperature thermal desorption process and a high-temperature thermal desorption system based on oil sludge solid waste treatment.

Background

The solid waste of the oil sludge, also called as oily sludge, refers to sludge mixed with petroleum hydrocarbon such as crude oil, various finished oil, residual oil and the like, belongs to dangerous waste and can cause harm to human bodies, animals and plants, and therefore, the solid waste of the oil sludge can be discharged after special treatments such as biological treatment, thermal washing, tempering and centrifugation, solvent extraction, chemical demulsification, solid-liquid separation, thermal cracking, thermal desorption (thermal desorption), pyrolysis method, incineration method and the like are required.

In the special treatment, the thermal desorption is to heat the dried and mixed oil-containing sludge to evaporate pollutants in the oil-containing sludge into a gaseous state after reaching a certain temperature, and obtain oil liquid and pollutants in the oil-containing sludge after condensation and separation, so that the oil-containing components can be recycled for the second time, and the pollutants are treated for the second time.

In the special treatment, the incineration method is characterized by quick and effective combustion in an aerobic state after oil sludge proportioning, and is the most used method, but the oil-containing components are not utilized, and the flue gas generated after the incineration also contains part of pollutants in the oil-containing sludge and can pollute the environment.

According to patent number CN113680784B, publication (bulletin) day: 2023-02-07 discloses an oily solid waste thermal desorption system and process for efficiently utilizing heat energy, wherein the system comprises: thermal desorption device, dust collector, dust removal dewatering device and burn the device, thermal desorption device's high temperature desorption gas outlet pass through the pipeline with dust collector's entry links to each other, dust collector's gas outlet pass through the pipeline with dust removal dewatering device's air inlet pipeline links to each other, dust removal dewatering device's exhaust duct pass through the pipeline with burn the entry of device and link to each other. The process and the system provided by the invention have the advantages of low operation difficulty, low cost and high energy utilization efficiency.

In the prior art comprising the patent, the oil-containing sludge can form vapor and slag after being heated and evaporated, and the vapor can be subjected to condensation treatment to extract oil in the vapor, but the condensation treatment contains noncondensable gas, and the noncondensable gas can be discharged only through additional multi-layer filtering treatment steps, so that the cost of the thermal desorption treatment process is increased.

Disclosure of Invention

The invention aims to provide a high-temperature thermal desorption process and a high-temperature thermal desorption system based on oil sludge solid waste treatment, and aims to solve the problem that non-condensable gas in thermal desorption treatment needs additional multi-layer filtration treatment.

In order to achieve the above object, the present invention provides the following technical solutions: a high-temperature thermal desorption process based on oil sludge solid waste treatment comprises the following steps:

s01, pretreatment: drying and mixing the oily solid waste to obtain mixed oil sludge;

s02, heating treatment: inputting the mixed oil sludge into rotary pyrolysis equipment, and intermittently heating the mixed oil sludge at a preset temperature to obtain pyrolysis oil gas, water vapor and solid products;

s03, condensing, separating and heating: treating the solid product as waste, introducing pyrolysis oil gas and water vapor into a spray module to obtain condensable gas and non-condensable gas, mixing the condensable gas with water after condensation, and carrying out solid-liquid separation by sedimentation to obtain pyrolysis oil and oily wastewater;

S04, impurity removal treatment: the non-condensable gas is input into a purification module to remove impurities such as acidic substances and the like, so as to obtain purified non-condensable gas;

S05, mixing and incinerating: the purified non-condensable gas is mixed with natural gas through a gas fan and then is fed into a hot blast stove to burn, and then heat is supplied to rotary pyrolysis equipment;

s06, tail gas purification: the non-condensable gas is purified by the flue gas treatment module and discharged after being combusted in the hot blast stove.

A high-temperature thermal desorption system based on sludge solid waste treatment, which is used for realizing the step S02 in the process, and comprises the following steps:

the rotary material bin is respectively provided with an outer spiral plate and an inner spiral plate with opposite screw thread rotation directions along the axis;

the indirect heating bin is sleeved outside the rotary material bin, and the first end of the indirect heating bin is fixedly communicated with the hot blast stove;

The rotary material bin is driven to rotate forwards, so that the inner spiral plate is driven to turn over to convey the mixed oil sludge to the first end, and the outer spiral plate is driven to convey heat to the second end.

Preferably, a diversion channel is arranged between the indirect heating bin and the outer spiral plate, and separation recesses are symmetrically arranged on the upper edge of the indirect heating bin along the axis so as to separate the two diversion channels and drive heat flow to flow along the outer spiral plate.

Preferably, the second end of the indirect heating bin is provided with a separation material barrel, a blocking mechanism is arranged between the separation material barrel and the indirect heating bin, the blocking mechanism comprises symmetrically movable blocking plates, and the blocking plates are close to each other along with the forward rotation of the rotary material bin and are far away from each other along with the reverse rotation of the rotary material bin.

Preferably, the separation discharging barrel comprises a steam pipe and a material fixing pipe, and the two plugging plates are attached to each other and then intermittently opened and closed along with continuous forward rotation of the rotary material bin.

Preferably, the second end of the separation material barrel is rotationally connected with a rotary gear ring, an attaching tooth block which is elastically connected with the rotary gear ring in a coupling way, and the plugging plate is coupled with the rotary gear ring.

Preferably, the second end of the separation material barrel is suspended and provided with a tensioning plate, and Zhang Geban is opened and closed intermittently along with the mutual separation of the two plugging plates.

Preferably, a preheating mechanism is arranged between the steam pipe and the indirect heating bin, the preheating mechanism comprises a preheating bin sleeved on the steam pipe, and the preheating bin is fixedly communicated with the indirect heating bin to transfer heat flow.

Preferably, a first preheating channel and a second preheating channel are arranged between the indirect heating bin and the preheating bin, and the rotary material bin is driven to rotate positively and negatively to drive heat flow to be conveyed to the preheating bin along the first preheating channel or the second preheating channel.

Preferably, a transmission air belt is rotatably connected between the first preheating channel and the second preheating channel, raised plates are arranged on the transmission air belt in a linear array, and the raised plates are pushed by the outer spiral plates to move.

In the technical scheme, the high-temperature thermal desorption process and system based on the treatment of the solid waste of the oil sludge provided by the invention have the following beneficial effects: the non-condensable gas generated through thermal desorption is mixed with natural gas after being subjected to acid removal treatment, and burnt in the hot blast stove, so that the non-condensable gas is treated in a burning manner, most of impurities are removed through burning and then is discharged, and compared with the steps of treating the non-condensable gas, the method of burning after purification can save freedom and has good purification effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic diagram of a system flow provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of an embodiment of the present invention;

FIG. 3 is an exploded view of a preheating mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a plugging mechanism according to an embodiment of the present invention;

FIG. 5 is an exploded view of a plugging mechanism according to an embodiment of the present invention;

FIG. 6 is an enlarged schematic view of FIG. 5A;

FIG. 7 is a schematic overall cross-sectional view of an embodiment of the present invention;

FIG. 8 is an enlarged schematic view of FIG. 7 at B;

FIG. 9 is a schematic overall cross-sectional view of an embodiment of the present invention;

FIG. 10 is a schematic diagram of a rotary material bin, an external spiral plate and a preheating mechanism provided by an embodiment of the invention;

FIG. 11 is an exploded view of a rotary material bin, an outer screw plate and an inner screw plate provided by an embodiment of the invention;

Fig. 12 is an enlarged schematic view at C in fig. 11.

Reference numerals illustrate:

1. A rotary material bin; 11. an outer spiral plate; 111. a wind stagnation plate; 12. an inner spiral plate; 2. indirectly heating the bin; 21. a first preheating channel; 22. an air inlet pipe; 221. an air outlet pipe; 23. a separation recess; 3. separating a discharge barrel; 31. a vapor tube; 32. a material fixing pipe; 4. a preheating mechanism; 41. preheating a bin; 42. a transfer wind belt; 421. a protruding plate; 43. a second preheating channel; 44. a first pair of tuyeres; 441. a second pair of tuyeres; 5. a scattering mechanism; 51. penetrating the board; 511. a chute; 52. a turnover plate; 521. an expansion plate; 522. a second elastic member; 6. a plugging mechanism; 60. attaching the tooth blocks; 601. a first elastic member; 61. a plugging plate; 611. a guide way; 612. a sliding bar; 62. a meshing gear; 63. rotating the gear ring; 630. a base ring; 631. intermittent teeth; 64. zhang Geban; 641. a sliding column; 642. and a fixing rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

Example 1

As shown in fig. 1, a high-temperature thermal desorption process based on oil sludge solid waste treatment comprises the following steps:

S02, heating treatment: weighing and metering the mixed oil sludge, inputting the metered mixed oil sludge into a feeding bin, inputting the mixed oil sludge into rotary pyrolysis equipment by a conveyor (a screw conveyor or a scraper conveyor), and intermittently heating the mixed oil sludge at a preset temperature (the preset temperature is 350-550 ℃) (the mixed oil sludge is isolated from air and does not directly contact flame or high-temperature airflow), so as to obtain pyrolysis oil gas, water vapor and solid products;

S03, condensing, separating and heating: the solid product is treated as waste, pyrolysis oil gas and water vapor are introduced into a spraying module to obtain condensable gas (long-chain, heterocyclic organic matters, water and other gases) and non-condensable gas (CO, H2, C1-C4 hydrocarbons, H2S and other gases), the condensable gas is sprayed and condensed in the spraying module and then mixed with water to obtain an oil-water residue mixture, the oil-water residue mixture is settled, solid-liquid separation is carried out in an oil-water separator to obtain pyrolysis oil and oily wastewater, the pyrolysis oil is pumped into a tank area for storage, and the oily wastewater is discharged into a sewage treatment system for treatment;

s06, tail gas purification: the non-condensable gas is combusted in the hot blast stove and then is purified by a flue gas treatment module (spray cooling, dry deacidification, active carbon adsorption, bag dust removal, induced draft fan and reservation) and then is discharged.

According to the technical scheme, the non-condensable gas generated through thermal desorption is mixed with natural gas after being subjected to acid removal treatment, and burnt in the hot blast stove, so that the non-condensable gas is treated in a burning mode, most of impurities are removed through burning and then is discharged, and compared with the steps of treating the non-condensable gas, the method of burning after purification can save freedom and has a good purifying effect.

Example two

As shown in fig. 2 to 12, a high temperature thermal desorption system based on sludge solid waste treatment comprises:

The rotary material bin 1 is respectively provided with an outer spiral plate 11 and an inner spiral plate 12 with opposite screw thread rotation directions along the axis;

The indirect heating bin 2 is sleeved outside the rotary material bin 1, and the first end of the indirect heating bin is fixedly communicated with the hot blast stove;

the rotary material bin 1 is driven to rotate forward so as to drive the inner spiral plate 12 to turn over to convey the mixed sludge to the first end and drive the outer spiral plate 11 to convey heat to the second end.

Specifically, the outer spiral plate 11 is disposed on the outer wall of the rotary material bin 1, the inner spiral plate 12 is disposed on the inner wall of the rotary material bin 1, the rotary material bin 1 is rotationally connected to the indirect heating bin 2, the rotary material bin 1 is driven by a motor or a motor to rotate along the indirect heating bin 2, a first end (taking fig. 3 as a reference, a left end and a right end as a left end) of the indirect heating bin 2 is symmetrically and fixedly communicated with the air inlet pipe 22 and the air outlet pipe 221, the air inlet pipe 22 is fixedly communicated with the hot blast stove, after the mixed sludge to be heated is input into the rotary material bin 1, a feed inlet of the rotary material bin 1 is closed and starts to rotate positively, the inner spiral plate 12 rotates along with the rotation to convey the mixed sludge to the first end, so that when the air inlet pipe 22 inputs hot air into the first end of the indirect heating bin 2, the temperature of the first end is higher, the heat flow can rise along with the rotation of the outer spiral plate 11 to convey the second end of the indirect heating bin 2, the air outlet pipe 221 is located at the first end, the heat flow can flow along with the rotation of the outer spiral plate 11 in the indirect heating bin 2, after the mixed sludge is discharged from the outer wall of the rotary material bin 1, the mixed sludge is directly discharged from the rotary material bin 1 after the spiral plate is lifted, the heat flow is directly discharged from the inner spiral plate is conveyed from the first end of the rotary material bin 1, and the mixed sludge is directly discharged from the inner spiral plate is cooled, after the inner heat flow is discharged from the inner spiral plate is directly, and the inner heat flow is discharged from the inner spiral plate is directly, when the inside.

In the above technical scheme, through the outer spiral plate 11 and the inner spiral plate 12 that screw thread rotation direction is opposite, when the gyration material storehouse 1 forward rotation is concentrated to the inside mixed oil sludge and is turned over and mix not hard up, outside heat flow can be guided to heat along gyration material storehouse 1 outer wall, promote the utilization ratio of heat flow.

As an embodiment provided by the invention, a diversion channel is arranged between the indirect heating bin 2 and the outer spiral plate 11, and separation recesses 23 are symmetrically arranged on the upper side along the axis so as to separate the two diversion channels and drive heat flow to flow along the outer spiral plate 11.

Specifically, the flow guiding channel is used for flowing out heat flow from the pitch between the outer spiral plates 11, and the separation recess 23 is attached to the maximum diameter of the outer spiral plates 11, so that the heat flow at the lower part is blocked by the separation recess 23 when the heat flow rises, so that the heat flow is limited to flow along the pitch between the outer spiral plates 11, and the heat flow transmission capability when the outer spiral plates 11 rotate is improved.

As an embodiment provided by the invention, the second end of the indirect heating bin 2 is provided with the separation charging basket 3, a blocking mechanism 6 is arranged between the separation charging basket and the separation charging basket, the blocking mechanism 6 comprises symmetrically movable blocking plates 61, and the blocking plates 61 are close to each other along with the forward rotation of the rotary material bin 1 and are far away from each other along with the reverse rotation of the rotary material bin 1.

Specifically, the sliding strip 612 is disposed on the plugging plate 61, the base ring 630 is disposed at the second end of the rotary material bin 1, the sliding strip 612 is slidably connected to the base ring 630, when the rotary material bin 1 rotates forward to heat, the two plugging plates 61 will approach each other to plug the discharge port formed at the second end of the rotary material bin 1, and when the rotary material bin 1 rotates forward to turn over, the two plugging plates 61 will move away from each other to open the discharge port.

When the mixed sludge to be heated is input into the rotary material bin 1, the rotary material bin 1 starts to rotate positively, the inner spiral plate 12 conveys the mixed sludge to the first end along with rotation during positive rotation, the mixed sludge is heated when the temperature of the first end is higher, meanwhile, the two plugging plates 61 are close to each other to plug the discharge port, rising heat flow can be conveyed to the second end of the indirect heating bin 2 along with rotation of the outer spiral plate 11 along with positive rotation, so that heat flow circulates along the indirect heating bin 2, the rotary material bin 1 rotates reversely, at the moment, the inner spiral plate 12 in the inside can convey the heated mixed sludge to the second end to be discharged, the outer spiral plate 11 can overturn and guide the air flow to the first end to be converged, so that heat flow is reduced to pass through the range of the outer wall of the rotary material bin 1 and is discharged from the air outlet pipe 221 directly, and meanwhile, the two plugging plates 61 are mutually far away to open the discharge port to discharge the separated material bucket 3.

As an embodiment provided by the invention, the separating and discharging barrel 3 comprises a steam pipe 31 and a material fixing pipe 32, and after the two plugging plates 61 are mutually attached, the two plugging plates are intermittently opened and closed along with the continuous forward rotation of the rotary material bin 1;

The second end of the separation material barrel 3 is rotationally connected with a rotary gear ring 63, and is elastically connected with a fitting gear block 60 coupled with the rotary gear ring 63, and the plugging plate 61 is coupled with the rotary gear ring 63.

Specifically, the rotating gear ring 63 is rotationally connected to the base ring 630, intermittent teeth 631 are circumferentially arranged on the rotating gear ring 63, a free stroke exists between the intermittent teeth 631, a first elastic member 601 is arranged between the attaching tooth block 60 and the second end of the separating barrel 3, the base ring 630 is rotationally connected with the engaging gear 62, the engaging gear 62 is respectively coupled with the sliding bar 612 and the rotating gear ring 63, when the separating barrel 3 rotates, the attaching tooth block 60 is attached to the intermittent teeth 631 on the rotating gear ring 63, at this time, the rotating gear ring 63 rotationally drives the sliding bar 612 to slidingly push the plugging plate 61 to rotate, and when the two plugging plates 61 attach to each other, the continuously rotating rotary material bin 1 bends the first elastic member 601 to enable the attaching tooth block 60 to be separated from the intermittent teeth 631, and the coupling with the rotating gear ring 63 is lost, and when rebounding, gaps appear between the two plugging plates 61, at this time, vapor pressure in the rotary material bin 1 is improved, leakage is performed from the gaps, and when the attaching tooth block 60 passes through the stroke to couple with the other intermittent teeth 631, gaps between the two plugging plates 61 are eliminated, and intermittent opening and closing of the plugging plates 61 can be released.

When the mixed sludge to be heated is input into the rotary material bin 1, the rotary material bin 1 starts to rotate positively, the inner spiral plate 12 conveys the mixed sludge to the first end along with rotation, the first end is heated when the temperature is higher, meanwhile, the joint tooth block 60 can be jointed on the intermittent tooth 631 on the rotary tooth ring 63 to drive the rotary tooth ring 63 to rotate, so that the two plugging plates 61 are driven to be close to each other to plug the discharge hole and rotate continuously, gaps can appear on the two plugging plates 61 to discharge steam along with continuous rotation, rising heat flow can be conveyed to the second end of the indirect heating bin 2 along with rotation of the outer spiral plate 11 along with positive rotation, so as to circulate heat flow along with the indirect heating bin 2, the rotary material bin 1 rotates reversely, at the moment, the inner spiral plate 12 in the inside can convey the heated mixed sludge to the second end to be discharged, the outer spiral plate 11 can overturn and guide the air flow to the first end to be converged, so that the heat flow is reduced through the range of the outer wall of the rotary material bin 1, and the two plugging plates 61 are directly discharged from the air outlet pipe 221, and meanwhile, the two plugging plates 61 are far away from each other, so that the discharge port is opened to discharge the material from the separation material bin 3.

As an embodiment of the present invention, the second end of the separation barrel 3 is suspended with a tensioning plate 64, zhang Geban 64 which is intermittently opened and closed along with the two plugging plates 61 being separated from each other.

Specifically, zhang Geban and 3834 include dead lever 642, dead lever 642 sets up on base ring 630, zhang Geban includes two elastic metal supported's piece that opens and shuts, be provided with the slip post 641 on the piece that opens and shuts, slip post 641 sliding connection is in the guide way 611 of seting up on shutoff board 61, when shutoff board 61 is with gyration material storehouse 1 reversal and keeping away from each other, can open and carry out elasticity energy storage through the piece that opens and shuts of slip post 641 pulling, then when laminating tooth piece 60 card goes into idle running, the piece that opens and shuts can rebound and close to realize reciprocating opening and shutting, the piece that opens and shuts that reciprocates can assist the discharge gate of mixing sludge discharge when the ejection of compact.

When the mixed sludge to be heated is input into the rotary material bin 1, the rotary material bin 1 starts to rotate positively, the inner spiral plate 12 conveys the mixed sludge to the first end along with rotation, the first end is heated when the temperature is higher, meanwhile, the joint tooth block 60 can joint the intermittent tooth 631 on the rotary tooth ring 63 to drive the rotary tooth ring 63 to rotate, so that the two plugging plates 61 are driven to be close to each other to plug the discharge port, and continue to rotate along with the rotation of the outer spiral plate 11 along with the positive rotation, the rising heat flow can be conveyed to the second end of the indirect heating bin 2 along with the rotation of the outer spiral plate 11, so that the heat flow circulates along with the indirect heating bin 2, the rotary material bin 1 rotates reversely, at the moment, the inner spiral plate 12 can convey the heated mixed sludge to the second end to be discharged, the outer spiral plate 11 can overturn and guide the air flow to the first end to be converged, so that the heat flow is reduced through the range of the outer wall of the rotary material bin 1, the two plugging plates 61 are directly discharged from the air outlet pipe 221, and are mutually far away, the two plugging plates are mutually separated from each other to open the discharge port to discharge the separation material bin 3, the discharge port is opened to the limit position, and the mixed sludge can be discharged when the discharge port is opened and closed.

As an embodiment provided by the invention, a preheating mechanism 4 is arranged between the steam pipe 31 and the indirect heating bin 2, the preheating mechanism 4 comprises a preheating bin 41 sleeved on the steam pipe 31, and the preheating bin 41 is fixedly communicated with the indirect heating bin 2 to transfer heat flow.

Specifically, the preheating bin 41 is used for hooping the vapor tube 31 to transfer heat flow to heat the vapor tube 31, so that vapor is directly condensed on the vapor tube 31 in the process of avoiding the leakage of the intermittently opened and closed plugging plate 61, thereby reducing liquid dropping on the material fixing tube 32 and increasing the collection rate of the vapor.

As an embodiment provided by the invention, a first preheating channel 21 and a second preheating channel 43 are arranged between the indirect heating bin 2 and the preheating bin 41, and the rotary material bin 1 is driven to rotate positively and negatively to drive heat flow to be conveyed to the preheating bin 41 along the first preheating channel 21 or the second preheating channel 43.

Specifically, the preheating bin 41 is fixedly connected with the first pair of air openings 44 and the second pair of air openings 441 respectively, the first pair of air openings 44 are fixedly connected with the second preheating channel 43, the second pair of air openings 441 are fixedly connected with the first preheating channel 21, when the revolving material bin 1 is heated in a forward rotation mode, heat flow enters the preheating bin 41 along the first preheating channel 21 to preheat the steam pipe 31 and then is discharged from the air outlet pipe 221 along the second preheating channel 43, when the revolving material bin 1 is discharged in a reverse rotation mode, the heat flow is conveyed to the preheating bin 41 along the second preheating channel 43 and is discharged from the air outlet pipe 221 along the first preheating channel 21, the steam pipe 31 can be heated in a forward rotation and reverse rotation mode, so that condensation is prevented from being generated in advance, and more steam is generated in a reverse rotation discharging process, but the heat flow is poured into the air outlet pipe 221 by the rotating outer spiral plate 11, and the heat flow is conveyed to the preheating bin 41 along the second channel 43 so that heating of the preheating bin 41 is increased.

When the mixed sludge to be heated is input into the rotary material bin 1, the rotary material bin 1 starts to rotate positively, the inner spiral plate 12 conveys the mixed sludge to the first end along with rotation, the temperature of the first end is higher, meanwhile, the joint tooth block 60 can be jointed on the intermittent tooth 631 on the rotary tooth ring 63 to drive the rotary tooth ring 63 to rotate, so that the two plugging plates 61 are mutually close to plug the discharge port, and continue to rotate along with the rotation, gaps can be formed between the two plugging plates 61 to discharge steam, the rising heat flow can be conveyed to the second end of the indirect heating bin 2 along with rotation of the outer spiral plate 11, so as to circulate the heat flow along with the indirect heating bin 2, the heat flow enters the preheating bin 41 along with the first preheating channel 21 to preheat the steam pipe 31 and then is discharged from the discharge air pipe 221 along the second preheating channel 43, the inner spiral plate 12 can convey the heated mixed sludge to the second end at this moment, the outer spiral plate 11 can overturn and guide the first end of the air to converge, so that the heat flow is reduced, the heat flow passes through the range of the outer wall of the rotary material bin 1, the two plugging plates are directly discharged from the preheating plate 11 along with the first preheating channel 21 and then discharged from the second preheating channel 43, the two material bin are simultaneously opened to the second preheating channel 43, the two material bin are separated from the discharge bin is discharged along with the second preheating channel 43, and the discharge hopper is separated from the discharge hopper, and the discharge hopper is opened along with the first material hopper, and the discharge bin is separated from the discharge hopper, and the discharge hopper is discharged from the discharge hopper is separated.

As an embodiment of the present invention, a transfer wind band 42 is rotatably connected between the first preheating channel 21 and the second preheating channel 43, and a protruding plate 421 is disposed on the transfer wind band 42 in a linear array, and the protruding plate 421 is pushed by the outer spiral plate 11 to move.

Specifically, the transfer wind band 42 is rotatably connected between the first preheating channel 21 and the second preheating channel 43 through two rotating shafts, the transfer wind band 42 is provided with raised plates 421 in a linear array, the outer spiral plate 11 is provided with a wind hysteresis plate 111 for reducing pitch and retaining heat flow, and when the outer spiral plate 11 rotates along with the rotary material bin 1, the wind hysteresis plate 111 pushes against the raised plates 421, so that the transfer wind band 42 is turned over to drive the heat flow to flow in the first preheating channel 21 and the second preheating channel 43.

As a preferred embodiment of the present invention, the rotary material bin 1 is provided with the scattering mechanism 5, the scattering mechanism 5 includes a penetrating plate 51 disposed at the junction of the outer spiral plate 11 and the inner spiral plate 12, a turning plate 52 is rotatably connected to the penetrating plate 51, and expansion plates 521 are elastically connected to two sides of the turning plate 52.

Specifically, a second elastic member 522 is disposed between the overturning plate 52 and the expansion plate 521, a receiving groove for accommodating the overturning plate 52 is formed in the penetrating plate 51, inclined grooves 511 are formed in two sides of the receiving groove, inclined surfaces are formed in the expansion plate 521, the receiving groove faces the discharge hole, when the revolving material bin 1 rotates positively, mixed oil sludge is accumulated at the first end of the revolving material bin 1 and inclines towards the second end, the inclined material at this time pushes the overturning plate 52 out of the receiving groove, the second elastic member 522 pushes the expansion plate 521 to be far away from the overturning plate 52 to form hook climbing to comb and loose the material, so as to accelerate thermal desorption, and when the revolving material bin 1 rotates reversely, the overturning plate 52 pushes the material to move towards the second end, and at this time, the overturning plate 52 is resisted to retract along the inclined grooves 511 and the inclined surfaces to the receiving groove, so that the overturning plate 52 and the expansion plate 521 are combined to form plane auxiliary pushing material.

When the mixed sludge to be heated is input into the rotary material bin 1, the rotary material bin 1 starts to rotate positively, the inner spiral plate 12 conveys the mixed sludge to the first end along with rotation, the mixed sludge is heated when the temperature of the first end is higher, meanwhile, the joint tooth block 60 is jointed on the intermittent tooth 631 on the rotary tooth ring 63 to drive the rotary tooth ring 63 to rotate, so as to drive the two plugging plates 61 to approach each other to plug the discharge hole, and continue to rotate along with the rotation, gaps are formed between the two plugging plates 61 to discharge steam, simultaneously, the inclined material pushes the turnover plate 52 out of the storage groove, the second elastic piece 522 pushes the expansion plate 521 away from the turnover plate 52 to form hook climbing to comb and loose the material, the ascending heat flow is conveyed to the second end of the indirect heating bin 2 along with the rotation of the outer spiral plate 11 along with positive rotation, the heat flow enters the preheating bin 41 along with the first preheating channel 21 to preheat the steam pipe 31 and then is discharged from the air outlet pipe 221 along with the second preheating channel 43, the rotary material bin 1 is reversed, the internal inner spiral plate 12 can convey the heated mixed sludge to the second end for discharge, meanwhile, the turning plate 52 can be retracted into the storage groove along the chute 511 and the inclined plane by resistance, so that the turning plate 52 and the expansion plate 521 are combined to form a planar auxiliary boosting material, the external spiral plate 11 can turn over to guide the air flow to the first end for convergence, so that the heat flow is reduced to be discharged from the air outlet pipe 221 directly through the range of the outer wall of the rotary material bin 1, the two blocking plates 61 are mutually far away to open the discharge hole for discharging the separated sludge 3, after the internal inner spiral plate 12 is opened to the limit position, the reciprocally opened and closed shutter can assist the mixed sludge to discharge the discharge hole during discharging, meanwhile, the heat flow is conveyed to the preheating bin 41 along the second preheating channel 43, and is discharged from the air outlet duct 221 along the first preheating duct 21.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.

Claims

1. The high-temperature thermal desorption process based on the treatment of the solid waste of the oil sludge is characterized by comprising the following steps of:

2. A high-temperature thermal desorption system based on the solid waste treatment of oil sludge, which is characterized in that it is used for realizing the step S02 in the high-temperature thermal desorption process based on the solid waste treatment of oil sludge according to claim 1, and comprises:

The rotary material bin (1) is respectively provided with an outer spiral plate (11) and an inner spiral plate (12) with opposite screw thread rotation directions along the axis;

The indirect heating bin (2) is sleeved outside the rotary material bin (1), and the first end of the indirect heating bin is fixedly communicated with the hot blast stove;

the rotary material bin (1) is driven to rotate forward so as to drive the inner spiral plate (12) to turn over to convey the mixed oil sludge to the first end and drive the outer spiral plate (11) to convey heat to the second end.

3. The high-temperature thermal desorption system based on the solid waste treatment of the oil sludge according to claim 2, wherein a diversion channel is arranged between the indirect heating bin (2) and the outer spiral plate (11), and separation recesses (23) are symmetrically arranged on the upper edge axis so as to separate the two diversion channels and drive heat flow to flow along the outer spiral plate (11).

4. The high-temperature thermal desorption system based on oil sludge solid waste treatment according to claim 2, wherein a separation material barrel (3) is arranged at the second end of the indirect heating bin (2), a plugging mechanism (6) is arranged between the two, the plugging mechanism (6) comprises symmetrically movable plugging plates (61), and the plugging plates (61) are close to each other along with forward rotation of the rotary material bin (1) and are far away from each other along with reverse rotation of the rotary material bin (1).

5. The high-temperature thermal desorption system based on oil sludge solid waste treatment according to claim 4, wherein the separation material barrel (3) comprises a steam pipe (31) and a solid material pipe (32), and the two plugging plates (61) are continuously and positively rotated to intermittently open and close along with the rotary material bin (1) after being mutually attached.

6. The high-temperature thermal desorption system based on oil sludge solid waste treatment according to claim 5, wherein a rotary gear ring (63) is rotatably connected to the second end of the separation barrel (3), a fitting gear block (60) coupled with the rotary gear ring (63) is elastically connected to the second end of the separation barrel, and the plugging plate (61) is coupled with the rotary gear ring (63).

7. The high-temperature thermal desorption system based on oil sludge solid waste treatment according to claim 6, wherein a tensioning plate (64) is arranged at the second end of the separation barrel (3) in a suspending manner, and the Zhang Geban (64) is opened and closed intermittently along with the two plugging plates (61) after being mutually far away.

8. The high-temperature thermal desorption system based on oil sludge solid waste treatment according to claim 5, wherein a preheating mechanism (4) is arranged between the steam pipe (31) and the indirect heating bin (2), the preheating mechanism (4) comprises a preheating bin (41) sleeved on the steam pipe (31), and the preheating bin (41) is fixedly communicated with the indirect heating bin (2) to transfer heat flow.

9. The high-temperature thermal desorption system based on sludge solid waste treatment according to claim 8, wherein a first preheating channel (21) and a second preheating channel (43) are arranged between the indirect heating bin (2) and the preheating bin (41), and the rotary material bin (1) is driven to rotate positively and negatively to drive heat flow to be conveyed to the preheating bin (41) along the first preheating channel (21) or the second preheating channel (43).

10. The high-temperature desorption system based on the sludge solid waste treatment according to claim 9, wherein a transfer wind belt (42) is rotatably connected between the first preheating channel (21) and the second preheating channel (43), raised plates (421) are arranged on the transfer wind belt (42) in a linear array, and the raised plates (421) are pushed by the outer spiral plates (11) to move.