CN111286352A

CN111286352A - Oil-containing solid waste pyrolysis device

Info

Publication number: CN111286352A
Application number: CN202010233352.7A
Authority: CN
Inventors: 刘三春; 陈辉; 师志虎; 范杰
Original assignee: Wuhan Jisi Guangyi Environmental Protection Technology Co Ltd
Current assignee: Wuhan Jisi Guangyi Environmental Protection Technology Co Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-06-16

Abstract

The invention belongs to the technical field of oily waste heat treatment equipment, and particularly relates to an oily solid waste pyrolysis device which comprises a feeding device, a first connecting pipe, a vaporization pipe, a second connecting pipe, a pyrolysis pipe, a third connecting pipe and a slag discharging device, wherein the feeding device is arranged from a feeding end to a discharging end in an upward inclined mode, the bottom of the discharging end is connected with the input end of the vaporization pipe through the first connecting pipe, the output end of the vaporization pipe is connected with the input end of the pyrolysis pipe through the second connecting pipe, the output end of the pyrolysis pipe is connected with the slag inlet end of the slag discharging device through the third connecting pipe, the slag discharging device is arranged in an upward inclined mode from the slag inlet end to the slag discharging end, a strict anoxic environment is formed during pyrolysis, safety and reliability are achieved, the service life of the equipment is long, and the manufacturing cost is low.

Description

Oil-containing solid waste pyrolysis device

Technical Field

The invention belongs to the technical field of oily waste heat treatment equipment, and particularly relates to an oily solid waste pyrolysis device.

Background

The oil-containing solid waste has special components and is difficult to degrade, mainly exists in the form of oil-containing sludge, and also comprises oil-containing sand, oil-containing biomass and other oil-containing substances. The oily sludge is not natural but formed in the oil exploitation process, and the oil content is high and can reach about 50%. The oil-containing sludge produced by each large oil field in China can reach millions of tons in total every year. The oily sludge contains a large amount of heavy metals and chemical components which are difficult to degrade, and if the oily sludge is directly discharged without being treated, serious damage is caused to the ecological environment and human health.

At present, the mode that adopts the pyrolysis in many places carries out innocent treatment to oily solid useless, but, the general design of current pyrolysis device is comparatively crude, does not form more strict oxygen deficiency condition when the pyrolysis, when carrying out the pyrolysis, has following problem: 1. after combustible gas generated by pyrolysis is mixed with air, flash explosion may occur, and potential safety hazards exist; 2. the secondary oxidation is easy to occur in the pyrolysis device, so that the possibility of oxygen corrosion of the pyrolysis device is increased, and the service life of equipment is possibly shortened; 3. pyrolysis gas generated by the pyrolysis device is easy to escape into the external environment, and unnecessary secondary pollution is generated.

Disclosure of Invention

In order to solve the problems, the invention provides the oil-containing solid waste pyrolysis device, which forms a strict oxygen-deficient environment during pyrolysis, is safe and reliable, has long service life of equipment and is low in manufacturing cost.

The invention is realized by adopting the following technical scheme:

the utility model provides a solid useless pyrolysis device of oiliness, includes loading attachment, first connecting pipe, vaporization pipe, second connecting pipe, pyrolysis pipe, third connecting pipe and unloads the sediment device, loading attachment sets up from feed end to discharge end tilt up, the bottom of discharge end is connected with the input of vaporization pipe through first connecting pipe, the output of vaporization pipe passes through the second connecting pipe and is connected with the input of pyrolysis pipe, the output of pyrolysis pipe passes through the third connecting pipe and unloads the sediment end of advancing of sediment device and be connected, unload the sediment device from advancing sediment end to arranging sediment end tilt up setting.

The invention has the beneficial effects that:

1. according to the oil-containing solid waste pyrolysis device, the high-temperature gas in the vaporization pipe and the pyrolysis pipe during working is in a micro-oxygen or oxygen-free state, so that secondary oxidation reaction is avoided during oil-containing solid waste treatment, the oxygen corrosion effect of the pipeline under a high-temperature condition can be effectively avoided, the vaporization pipe and the pyrolysis pipe can be made of metal materials with good heat conductivity, over-high metal corrosion resistance is not required to be emphasized, the utilization effect of heat energy can be improved, and the manufacturing cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of an oil-containing solid waste pyrolysis apparatus according to the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is an enlarged view of a portion B in fig. 1.

Fig. 4 is a schematic gas flow direction diagram of the oil-containing solid waste pyrolysis apparatus of the present invention.

Fig. 5 is an enlarged view of a portion C in fig. 4.

Fig. 6 is an enlarged view of a portion D in fig. 4.

In the figure, 1, a feeding device; 2. a first connecting pipe; 3. a vaporization tube; 31. a vaporization housing; 32. a vaporization coil 33, a vaporization conveying device; 4. a second connecting pipe; 5. a pyrolysis tube; 51. pyrolyzing the shell; 52. a pyrolysis coil; 53. a pyrolysis conveying device; 6. a third connecting pipe; 7. a slag discharge device; 71. a slag discharge pipe; 8. an exhaust pipe; 9. a bridge pipe; 91. a pyrolytic linking segment; 92. a bridging section; 93. a vaporizing connecting section.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

The high-temperature gas is gas which is heated in the vaporizing tube 3 and the pyrolysis tube 5 compared with the outside gas, and the temperature of the heated gas is higher than 50 ℃ compared with the outside gas.

Referring to fig. 1, a solid useless pyrolysis device of oiliness, including loading attachment 1, first connecting pipe 2, vaporization pipe 3, second connecting pipe 4, pyrolysis pipe 5, third connecting pipe 6 and unload sediment device 7, loading attachment 1 sets up from the feed end to discharge end tilt up, the bottom of discharge end is connected with the input of vaporization pipe 3 through first connecting pipe 2, the output of vaporization pipe 3 passes through second connecting pipe 4 and is connected with the input of pyrolysis pipe 5, the output of pyrolysis pipe 5 passes through third connecting pipe 6 and unloads the sediment end of advancing of sediment device 7 and be connected, unload sediment device 7 from advancing sediment end to arranging sediment end tilt up setting.

Preferably, at least 1 of the first connecting pipe 2, the second connecting pipe 4 and the third connecting pipe 6 is vertically arranged; the arrangement is that when the first connecting pipe 2, the second connecting pipe 4 and the third connecting pipe 6 are all obliquely arranged, the pyrolysis gas obtained by the oil-containing solid waste pyrolysis device has a tendency of rising along the inner walls of the first connecting pipe 2, the second connecting pipe 4 and the third connecting pipe 6, and the material can form a turbulent flow effect after contacting with the inner walls when being transported from top to bottom, so that the flow of the pyrolysis gas is further disturbed.

For example, as a preferable scheme, in order to facilitate the material in the feeding device 1 to fall down into the vaporization pipe 3 as soon as possible, while the contact with the inner wall of the first connecting pipe 2 is reduced, and simultaneously the plugging effect of a micro-oxygen layer is formed between the vaporizing pipe 3 and the feeding device 1, so as to prevent the outside oxygen-enriched air from entering the vaporizing pipe 3 and the pyrolysis pipe 5, the first connecting pipe 2 can be vertically arranged, and referring to fig. 4, after the high-temperature gas in the vaporization pipe 3 enters the top of the feeding device 1 through the first connecting pipe 2, a micro-oxygen layer containing the high-temperature gas is formed on the top of the feeding device 1, the range of the micro-oxygen layer refers to the space above the dotted line of the feeding device 1 in fig. 4, and at this time, the second connecting pipe 4 and the third connecting pipe 6 may be inclined with a certain inclination angle, for example, the inclination angle is 8 °, and may also be respectively vertically arranged;

for another example, as a further preferable scheme, the second connecting pipe 4 is vertically arranged, so that the material in the vaporizing pipe 3 can conveniently and quickly fall into the pyrolysis pipe 5;

for another example, as a further preferable scheme, the third connecting pipe 6 is vertically arranged, and the high-temperature gas in the pyrolysis pipe 5 is influenced by the self-pressure to form a micro-oxygen layer in the third connecting pipe 6, and referring to fig. 5, the range of the micro-oxygen layer refers to a space above the dotted line of the third connecting pipe 6; even more, as the heating time is extended, referring to fig. 6, the range of the micro-oxygen layer is referred to a space above the dotted line of the slag release pipe 71.

Because the high-temperature gas inside the vaporizing tube 3 and the pyrolysis tube 5 is in a micro-oxygen or oxygen-free state during working, at least the following two effects are achieved: 1. ensures that no secondary oxidation reaction occurs during the treatment of the oil-containing solid waste, for example, can avoid the secondary oxidation of CO, thereby avoiding the formation of CO₂(ii) a 2. The oxygen corrosion effect of the pipeline under the high-temperature condition can be effectively avoided, so that the vaporization pipe 3 and the pyrolysis pipe 5 can be made of metal materials with better heat conductivity without emphasizing the overhigh metal corrosion resistance, and the utilization effect of heat energy can be improved; in this embodiment, all of the first connecting pipe 2, the second connecting pipe 4 and the third connecting pipe 6 are vertically arranged, so that the best use effect can be achieved.

In order to save the installation space of the oil-containing solid waste pyrolysis device, the feeding end of the feeding device 1 and the slag discharging end of the slag discharging device 7 are positioned on the same vertical plane; in order to facilitate the transfer of the oil-containing solid waste pyrolysis device, the vaporizing tube 3, the second connecting tube 4 and the hot connecting tube can be integrally installed on the prying seat.

Preferably, the vaporization pipe 3 comprises a vaporization shell 31, a vaporization coil 32 and a vaporization conveying device 33, the pyrolysis pipe 5 comprises a pyrolysis shell 51, a pyrolysis coil 52 and a pyrolysis conveying device 53, the vaporization coil 32 and the pyrolysis coil 52 are medium-high frequency electromagnetic heating coils, the vaporization conveying device 33 and the pyrolysis conveying device 53 are spiral conveying devices, the vaporization coil 32 is wound on the outer wall of the vaporization shell 31, the pyrolysis coil 52 is wound on the outer wall of the pyrolysis shell 51, further preferably, the length of the vaporization coil 32 is 1/5-1/3 of the length of the vaporization shell 31, and the length of the pyrolysis coil 52 is 1/5-1/3 of the length of the pyrolysis shell 51;

preferably, an exhaust pipe 8 is arranged at the top of the output end of the vaporization pipe 3, the exhaust pipe 8 is used for exhausting high-temperature gas in the vaporization pipe 3, and preferably, the length of the vaporization shell 31 is 6-8 m, in this embodiment, the length of the vaporization shell 31 is 8m, the coating length of the vaporization coil 32 is 2m, the coating length of the pyrolysis coil 52 is 2m, and the distance between the bottom end of the exhaust pipe 8 and the end of the output end of the vaporization pipe 3 is 0.5 m; under the prerequisite of guaranteeing that the high-temperature gas in vaporization pipe 3 and pyrolysis tube 5 is in the pressure-fired state, blast pipe 8 can realize the pump drainage effect to high-temperature gas through the mode of external draught fan to accelerate the speed of transfering to high-temperature gas in suitable within range, be favorable to guaranteeing the treatment effect to the solid useless of oiliness. In addition, the micro-positive pressure state can ensure that the pyrolysis gas is not discharged to the outside, and the environment pollution caused by the pyrolysis gas is avoided.

Preferably, a bridging pipe 9 is arranged between the input end of the vaporization pipe 3 and the output end of the pyrolysis pipe 5; through the arrangement of the bridge pipe 9, the high-temperature gas generated in the pyrolysis pipe 5 enters the vaporization pipe 3 through the bridge pipe 9 and is discharged to the outside through the exhaust pipe 8.

Referring to fig. 1 to 3, preferably, the bridge pipe 9 is of a U-shaped structure, the bridge pipe 9 includes a pyrolysis connecting section 91, a bridge section 92 and a vaporization connecting section 93, and an output end of the pyrolysis pipe 5 is communicated with an input end of the vaporization pipe 3 through the pyrolysis connecting section 91, the bridge section 92 and the vaporization connecting section 93 in sequence; further preferably, at least one of the pyrolysis connecting section 91 and the vaporization connecting section 93 is a vertically arranged straight tubular structure, and the arrangement of the straight tubular structure can prevent high-temperature gas generated in the vaporization pipe 3 from entering the pyrolysis pipe 5 through the bridging pipe 9 to the greatest extent, so that the pyrolysis separation effect of the pyrolysis pipe 5 can be ensured; in this embodiment, the pyrolysis connecting section 91 and the vaporization connecting section 93 are vertically arranged straight tubular structures; still more preferably, the bridging section 92 has a straight tubular structure or a curved structure; in the present embodiment, the curved structure is an arc-shaped structure, and the protruding end of the arc-shaped structure is far away from the vaporizing tube 3.

Referring to fig. 1 to 3, the lower end of the vaporization connecting section 93 is communicated with a position on the vaporization shell 31 with a height of 2/3 to 7/8, preferably, the height of the vaporization shell 31 is 320 to 380mm, in this embodiment, the height of the vaporization shell 31 is 360mm, and the lower end of the vaporization connecting section 93 is communicated with a position on the vaporization shell 31 with a height of 290 mm.

When in use, the following steps are referenced:

firstly, pretreating oil-containing solid wastes such as oil-containing sludge, oil-containing sand and the like to obtain particles with the particle size of less than 10 mm;

secondly, opening the vaporization coil 32 and the pyrolysis coil 52, and adjusting the temperature of the vaporization tube 3 to be 200-350 ℃ and the temperature of the pyrolysis tube 5 to be 350-550 ℃;

thirdly, loading the material to the input end of the feeding device 1;

and fourthly, starting the vaporization conveying device 33, the pyrolysis conveying device 53, the feeding device 1 and the slag discharging device 7, and then starting the induced draft fan.

After the steps are operated, the oil-containing solid waste pyrolysis device can normally operate; and the pyrolysis flue gas is cooled by four-stage water spraying to collect oil, and the non-condensable gas is output and recovered or is combusted in an environment-friendly manner.

The invention is not limited to the above-described examples, and various modifications or alterations without inventive work may be made by those skilled in the art within the scope of the invention defined by the claims appended hereto.

Claims

1. The utility model provides an oiliness is useless pyrolysis device admittedly which characterized in that: including loading attachment (1), first connecting pipe (2), vaporization pipe (3), second connecting pipe (4), pyrolysis pipe (5), third connecting pipe (6) and unload sediment device (7), loading attachment (1) sets up from feed end to discharge end tilt up, the bottom of discharge end is connected with the input of vaporization pipe (3) through first connecting pipe (2), the output of vaporization pipe (3) is connected with the input of pyrolysis pipe (5) through second connecting pipe (4), the output of pyrolysis pipe (5) is connected with the sediment end of advancing of unloading sediment device (7) through third connecting pipe (6), unload sediment device (7) from advancing sediment end to sediment end tilt up setting.

2. The oil-containing solid waste pyrolysis device according to claim 1, characterized in that: wherein 1 of first connecting pipe (2), second connecting pipe (4) and third connecting pipe (6) sets up vertically, or, wherein 2 of first connecting pipe (2), second connecting pipe (4) and third connecting pipe (6) set up vertically, or, first connecting pipe (2), second connecting pipe (4) and the whole vertical settings of third connecting pipe (6).

3. The oil-containing solid waste pyrolysis device according to claim 1, characterized in that: the feeding end of the feeding device (1) and the slag discharging end of the slag discharging device (7) are positioned on the same vertical surface.

4. The oil-containing solid waste pyrolysis device according to claim 1, characterized in that: vaporization pipe (3) are including vaporization casing (31), vaporization coil (32) and vaporization conveyor (33), pyrolysis pipe (5) are including pyrolysis casing (51), pyrolysis coil (52) and pyrolysis conveyor (53), vaporization coil (32) and pyrolysis coil (52) are medium and high frequency electromagnetic heating coil, vaporization conveyor (33) and pyrolysis conveyor (53) are spiral conveyor, vaporization coil (32) winding sets up on the outer wall of vaporization casing (31), pyrolysis coil (52) winding sets up on the outer wall of pyrolysis casing (51) the length of vaporization coil (32) cladding is 1/5 ~ 1/3 of vaporization casing (31) length, the length of pyrolysis coil (52) cladding is 1/5 ~ 1/3 of pyrolysis casing (51) length.

5. The oil-containing solid waste pyrolysis device according to claim 1, characterized in that: an exhaust pipe (8) is arranged at the top of the output end of the vaporization pipe (3), and the exhaust pipe (8) is used for exhausting high-temperature gas in the vaporization pipe (3).

6. The oil-containing solid waste pyrolysis device according to claim 1, characterized in that: a bridging pipe (9) is arranged between the input end of the vaporization pipe (3) and the output end of the pyrolysis pipe (5).

7. The oil-containing solid waste pyrolysis device according to claim 6, characterized in that: bridge pipe (9) are U font structure, bridge pipe (9) include pyrolysis linkage segment (91), bridge segment (92) and vaporization linkage segment (93), and the output of pyrolysis pipe (5) loops through pyrolysis linkage segment (91), bridge segment (92) and vaporization linkage segment (93) and communicates with the input of vaporization pipe (3).

8. The oil-containing solid waste pyrolysis device according to claim 7, characterized in that: the pyrolysis connecting section (91) and/or the vaporization connecting section (93) are vertically arranged straight tube-shaped structures, and the bridging section (92) is a straight tube-shaped structure or a bent structure.

9. The oil-containing solid waste pyrolysis device according to claim 8, characterized in that: the bent structure is an arc-shaped structure, and the protruding end of the arc-shaped structure is far away from the vaporization pipe (3).

10. The oil-containing solid waste pyrolysis device according to claim 7, characterized in that: the lower end of the vaporization connecting section (93) is communicated with the position with the height of 2/3-4/5 on the vaporization shell (31).