CN213295240U

CN213295240U - Pyrolysis gas pipeline

Info

Publication number: CN213295240U
Application number: CN202021911137.XU
Authority: CN
Inventors: 于军; 宋占龙; 苏颖; 李明泽; 梁恒
Original assignee: SHANDONG WATER ENVIRONMENTAL PROTECTION CO Ltd; Shandong University; Shandong Academy of Environmental Science
Current assignee: SHANDONG WATER ENVIRONMENTAL PROTECTION CO Ltd; Shandong University; Shandong Academy of Environmental Science
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2021-05-28
Anticipated expiration: 2030-09-03

Abstract

The utility model relates to an oiliness sludge treatment equipment field specifically is a pyrolysis gas pipeline, including furnace body and pyrolysis gas pipeline, pyrolysis gas pipeline includes body, spiral scraper blade and actuating mechanism, the body is connected in the lateral part of furnace body, be equipped with the hydrojet mouth in the body, the spiral scraper blade is installed in the body and is extended to the low reaches of body by the upper reaches of hydrojet mouth, actuating mechanism is used for driving the spiral scraper blade rotatory. Compared with the prior art, the utility model discloses a pyrolysis gas pipeline realizes pyrolysis gas pipeline's comprehensive cleanness through set up hydrojet mouth and spiral scraper blade in pyrolysis gas pipeline, prevents that pyrolysis gas pipeline from blockking up because of the coking, need not shut down and cleans, guarantees the production progress.

Description

Pyrolysis gas pipeline

Technical Field

The utility model relates to an oiliness sludge treatment equipment field specifically is a pyrolysis gas pipeline.

Background

The oily sludge is a mixture of various forms which is formed by mixing crude oil or finished oil into soil or other media, wherein oil content in the mixture can not be directly recovered and can cause pollution, and the oily sludge is one of main pollutants in the petrochemical industry. Under the increasing pressure of environmental protection, the pollution problem caused by the oily sludge accumulated in oil fields and refining and chemical enterprises is highly emphasized by the nation, and the enterprises need to properly dispose the oily sludge generated in the production activities. At present, the treatment modes for oil-containing sludge reaching the standard at home and abroad comprise incineration treatment, water washing treatment, profile control agent treatment, temporary storage and pyrolysis, wherein the pyrolysis method has the advantages of moderate cost, mature process, high reduction degree, capability of recycling partial oil, thorough harmlessness, no secondary pollution and the like.

CN108911456A discloses a new oily sludge treatment system, which comprises three sequentially connected crackers, namely a primary cracker, a secondary cracker and a tertiary cracker, wherein the oily sludge sequentially passes through the primary cracker, the secondary cracker and the tertiary cracker for treatment; the cracker includes feed inlet, reaction chamber, natural gas combustor, oil gas export and discharge gate, be provided with screw propulsion and heat-radiating pipe in the reaction chamber, the feed inlet reaches the discharge gate is located respectively the both ends of reaction chamber and with the reaction chamber intercommunication is with the feeding and the ejection of compact, the natural gas combustor with heat-radiating union coupling is used for the heating heat-radiating pipe makes heat-radiating pipe heats through the mode of radiation the reaction chamber, screw propulsion is used for with material in the reaction chamber is followed the feed inlet impels extremely the discharge gate, the gas that produces in the reaction chamber is followed reserve mouthful discharge. Cracked oil gas comes out from the oil gas outlet and can coke in the pipeline to gradually block the pipeline, so that the pipeline needs to be stopped to clean, and the production progress is influenced.

CN110608443A discloses a small-sized solid organic waste purification system, see paragraph 0035 of the document, "for removing the deposited ash of the condenser pipe 9 and the air outlet 1-9 connected between the purification device and the incinerator 1, the ash removal device is used for removing the deposited ash on the pipe wall in the condenser pipe; in the operation process of the equipment, the burnt plaster is easy to deposit in the pipeline, a turbine worm box C-2 is fixed in the condensing pipe 9, a transverse output shaft C-6 of the turbine worm box C-2 is connected with a hard spring C-1, the diameter of the spring occupies at least two thirds of the space, and the hard spring pushes the plaster to move towards two sides, so that the plaster accumulated in the transverse pipe is cleaned; the vertical output shaft C-5 of the worm gear case C-2 is connected to a chain which rotates to scrape the stucco from the pipe wall, and the stucco falls under its own weight into the putty storage bin 10 below. The worm gear box C-2 is manually operated in a rocking handle mode in consideration of the miniaturization and cost of the equipment. When the rocking handle operation port works in the garbage furnace, the suspension cover C-4 is used for sealing gas. "the dust cleaning device has the defects that: (1) the hard spring can only clean and convey plaster in a straight line and is not suitable for a bent cracking gas channel; (2) the pyrolysis gas contains ash particles, oil vapor, noncondensable gas, water vapor and the like, the oil vapor is condensed through the condensing pipe to fractionate light and heavy components in the pyrolysis gas so as to recover the oil and the gas, the ash particles in the pyrolysis gas are melted into a liquid state or a softened state at a high temperature, the ash particles in the molten state meet the condensing pipe along with the downstream conveying, the ash particles are changed into the softened state from the liquid state and then changed into a solid state along with the temperature reduction, and if the ash particles still keep the softened state and contact the condensing pipe, the ash particles are bonded on a heating surface due to cooling to form coking, so that the condensing pipe is easy to cause pipeline coking.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the not enough of above-mentioned prior art, provide a pyrolysis gas pipeline, through set up hydrojet mouth and spiral scraper blade in pyrolysis gas pipeline, realize pyrolysis gas pipeline's comprehensive cleanness, prevent that pyrolysis gas pipeline from blockking up because of the coking, need not shut down and clean, guarantee the production progress.

The utility model discloses the technical problem that will solve adopts following technical scheme to realize: the utility model provides a pyrolysis gas pipeline, includes body, spiral scraper blade and actuating mechanism, be equipped with the hydrojet mouth in the body, spiral scraper blade installs in the body and extends to the low reaches of body by the upper reaches of hydrojet mouth, actuating mechanism is used for driving spiral scraper blade rotatory.

The technical proposal of the utility model is also that: the liquid spraying opening faces to the downstream of the pipe body, and the spiral scraper extends from the upstream of the liquid spraying opening to the liquid spraying opening or the downstream of the liquid spraying opening. By adopting the technical scheme, the liquid is sprayed out of the liquid spraying port facing the downstream of the pipe body, so that the cracked gas can be quenched, the inner wall of the large-diameter section can be uniformly washed, and the coke residue and the plaster can be washed to the downstream of the pipe body.

The technical proposal of the utility model is also that: the liquid spraying openings are uniformly distributed at intervals along the circumferential direction of the pipe body.

The technical proposal of the utility model is also that: the pipe body comprises a small-diameter section and a large-diameter section, the outer diameter of the small-diameter section is smaller than the inner diameter of the large-diameter section, and the spiral scraper is coaxial with the small-diameter section and matched with the inner diameter of the small-diameter section; the small-diameter section is coaxially connected to the upstream of the large-diameter section, an annular plate is arranged at the connecting end of the small-diameter section and the large-diameter section, and the liquid spraying ports are uniformly distributed on the annular plate; the outer fixing sleeve of the small-diameter section is provided with an outer sleeve, an annular cavity is formed among the outer sleeve, the small-diameter section and the annular plate, and the outer sleeve is provided with a liquid inlet communicated with the annular cavity. The pyrolysis gas pipeline of the technical scheme has simple processing and manufacturing and low cost.

The technical proposal of the utility model is also that: the inner wall of the liquid spraying opening is provided with a spiral groove. In the technical scheme, the spiral groove forms a rotary atomization effect on the liquid, so that the heat exchange effect and the mass transfer effect of the liquid and the pyrolysis gas are enhanced.

Compared with the prior art, the utility model discloses pyrolysis gas pipeline's beneficial effect does: (1) cracking gas flows outwards through the pipe body, because the temperature of the part of the pipe body close to the furnace body is higher and is easier to carbonize and coke, the part of the coking body is firmer and is difficult to clean, and the part of the coking body is not suitable to be quenched and washed by liquid, otherwise the liquid enters the furnace body to influence the cracking reaction, the inner wall of the pipe body is scraped and cleaned by the spiral scraper, and the coking body is scraped from the inner wall of the pipe body by the spiral scraper and is conveyed to the downstream of the pipe body; for the pipe body relatively far away from the furnace body, liquid is sprayed into the pipe body through the liquid spraying opening, the cracked gas is quenched, the molten soot particles are rapidly cooled to be in a solidified state and are suspended in the liquid, the liquid can further reduce the viscosity of the soot particles and prevent the inner wall of the pipe body from coking, and the liquid can wash off impurities such as plaster, coking bodies and the like attached to the inner wall of the pipe body and convey the impurities to the downstream; (2) liquid is sprayed into the tube body through the liquid spraying port, and the high-temperature pyrolysis gas is cooled, so that part of oil gas in the pyrolysis gas is liquefied, and the subsequent separation and recovery of the pyrolysis gas are facilitated; (3) the pyrolysis gas after retrieving is used for as the gas, and consequently the sulphide wherein exceeds standard can the polluted atmosphere, the utility model discloses a spray liquid, make the sulphide in the pyrolysis gas dissolve in the flushing agent to purify the pyrolysis gas.

Drawings

Fig. 1 is a perspective view of a cracked gas exhaust system according to an embodiment.

Fig. 2 is a perspective view of a cracked gas pipeline in accordance with a first embodiment.

FIG. 3 is a main sectional view of a cracked gas pipeline in accordance with one embodiment.

FIG. 4 is a perspective view of a spiral flight according to a first embodiment.

FIG. 5 is a perspective view of an annular plate in accordance with an embodiment.

In the figure: 1. furnace body, 2, pyrolysis gas pipeline, 3, spiral scraper, 4, driving mechanism, 5, small diameter section, 6, large diameter section, 7, annular plate, 8, liquid spraying opening, 9, outer sleeve, 10, annular cavity, 11, liquid inlet, 12, solid-liquid separation device, 13, mixed reflux pipe, 14, circulating pipeline, 15, explosion-proof opening, 16, driving shaft, 17 and spiral groove.

Detailed Description

The following examples are further illustrative of the present invention, but the present invention is not limited thereto. Because of the utility model discloses it is more complicated, therefore embodiment is only right the utility model discloses a point part carries out the detail, the utility model discloses the part of not detail all can adopt prior art.

Example 1:

as shown in fig. 1 to 5, the pyrolysis gas duct of the present embodiment is a part of a pyrolysis gas discharge system of a pyrolysis furnace, and the pyrolysis gas discharge system of the pyrolysis furnace includes a furnace body 1, a pyrolysis gas duct 2, and a solid-liquid separation device 12.

The pyrolysis gas pipeline 2 comprises a pipe body, a spiral scraper 3 and a driving mechanism.

As shown in fig. 3, the pipe body includes a small diameter section 5 and a large diameter section 6, and the small diameter section 5 has an outer diameter smaller than an inner diameter of the large diameter section 6. The side wall of the furnace body 1 is provided with a mounting hole, and the part of the small-diameter section 5 is inserted into the mounting hole. The small diameter section 5 is coaxially connected with the upstream of the large diameter section 6 through a flange, the connecting end of the small diameter section 5 and the large diameter section 6 is provided with an annular plate 7, the liquid spraying ports 8 are uniformly distributed on the annular plate 7, as shown in fig. 5, the annular plate 7 is provided with a plurality of liquid spraying ports 8 along the circumferential direction, and the liquid spraying ports 8 face the downstream of the pipe body. The inner wall of the liquid spraying port 8 is provided with a spiral groove 17, and the spiral groove 17 forms a rotary atomization effect on liquid, so that the heat exchange effect and the mass transfer effect of the liquid and pyrolysis gas are enhanced. The outer fixing sleeve of minor diameter section 5 is equipped with outer tube 9, form annular chamber 10 between outer tube 9, minor diameter section 5 and the annular plate 7, be equipped with the liquid inlet 11 with annular chamber 10 intercommunication on the outer tube 9.

The spiral scraper 3 is coaxially arranged in the small-diameter section 5 and extends from the upstream of the liquid spraying opening 8 to the downstream of the liquid spraying opening 8, and the spiral scraper 3 is matched with the inner diameter of the small-diameter section 5.

The driving mechanism 4 is used for driving the spiral scraper 3 to rotate, in this embodiment, the driving mechanism 4 is a speed reduction motor, and the driving mechanism 4 is installed at the downstream end of the large-diameter section and is connected with the spiral scraper 3 through a driving shaft 16. Because the driving mechanism 4 is relatively far away from the furnace body 1, the failure of the driving mechanism 4 caused by the high-temperature radiation of the furnace body 1 can be avoided.

Along the one end that body and furnace body 1 are connected to the direction of keeping away from furnace body 1, the body downward sloping sets up, can further avoid the liquid that the hydrojet 8 sprays and by clear cinder, plaster entering furnace body 1, prevents to influence the pyrolytic reaction in the furnace body 1.

The large-diameter section 6 is provided with an explosion-proof opening 15, and when the pressure in the tube body rises to a certain value, the tube body can be opened automatically to release the pressure, so that the safety of the tube body is protected.

As shown in fig. 1, the lower end of the pipe body is connected with a solid-liquid separation device 12 through a mixing return pipe 13, the solid-liquid separation device 12 is connected with a liquid inlet 11 through a circulating pipeline 14, a circulating water pump 17 is arranged on the circulating pipeline 14, and the output pressure of the circulating water pump 17 is 3-4 kg.

Cracking gas flows out of the furnace body 1 through the pipe body, because the small-diameter section 5 is close to the furnace body 1, the temperature of the small-diameter section 5 is higher, carbonization and coking are easier, the coking body of the small-diameter section 5 is firmer and is difficult to clean, and the part of the coking body is not suitable to be washed by liquid, otherwise the liquid enters the furnace body 1 to influence the cracking reaction, the inner wall of the small-diameter section 5 is scraped and cleaned by the spiral scraper 3 extending from the upstream end of the small-diameter section 5 to the downstream of the liquid spraying port 8, and the coking body is scraped from the inner wall of the small-diameter section 5 by the spiral scraper 3 and is conveyed to the downstream of the; to keeping away from the big footpath section 6 of furnace body relatively, spray liquid in 8 to big footpath section 6 through the hydrojet, carry out the rapid cooling to the pyrolysis gas, make fused grits cool off fast and be the solidification and suspend in liquid, and liquid can further reduce the viscidity of grits, prevent the coking of body inner wall, and, liquid can wash the plaster of a plaster on the 6 inner walls of big footpath section attached to, impurity such as the coking body, and carry impurity downstream, be applicable to the non-linear type pipeline, realize the comprehensive cleanness of pyrolysis gas pipeline, prevent that pyrolysis gas pipeline from blockking up because of the coking, do not need to shut down and clean, guarantee the production progress. Because the small-diameter section 5 is connected to the side part of the furnace body 1, the liquid sprayed by the liquid spraying opening 8, the cleaned coke slag and the plaster can be prevented from entering the furnace body 1, and the pyrolysis reaction is not influenced. Liquid is sprayed into the tube body through the liquid spraying port 8, high-temperature pyrolysis gas is cooled, and subsequent pyrolysis gas separation is facilitated. The liquid, the coke slag and the plaster enter the solid-liquid separation device 12 through the mixing return pipe 13 to realize the separation of the coke slag, the pyrolysis gas and the liquid, and the liquid is pumped back to a liquid spraying opening through the circulating pipeline 14 by the circulating water pump 17 to realize the recycling of the liquid.

The "upstream" and "downstream" in this embodiment refer to upstream and downstream in the flow direction of the cracked gas.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. The utility model provides a pyrolysis gas pipeline, includes the body, its characterized in that: still include spiral scraper blade (3) and actuating mechanism, be equipped with hydrojet mouth (8) in the body, spiral scraper blade (3) are installed in the body and are extended to the low reaches of body by the upper reaches of hydrojet mouth (8), actuating mechanism (4) are used for driving spiral scraper blade (3) and rotate.

2. The cracked gas conduit of claim 1, wherein: the liquid spraying opening (8) faces to the downstream of the pipe body, and the spiral scraper (3) extends from the upstream of the liquid spraying opening (8) to the liquid spraying opening (8) or the downstream of the liquid spraying opening.

3. The cracked gas conduit of claim 1, wherein: the liquid spraying ports (8) are uniformly distributed along the circumferential direction of the pipe body at intervals.

4. Pyrolysis gas conduit according to claim 1 or 2, characterized in that: the pipe body comprises a small-diameter section (5) and a large-diameter section (6), the outer diameter of the small-diameter section (5) is smaller than the inner diameter of the large-diameter section (6), and the spiral scraper (3) is coaxial with the small-diameter section (5) and matched with the inner diameter of the small-diameter section (5); the small-diameter section (5) is coaxially connected to the upstream of the large-diameter section (6), an annular plate (7) is arranged at the connecting end of the small-diameter section (5) and the large-diameter section (6), and the liquid spraying ports (8) are uniformly distributed on the annular plate (7); the outside fixed cover of path section (5) is equipped with outer tube (9), form between outer tube (9), path section (5) and annular plate (7) ring chamber (10), be equipped with on outer tube (9) with liquid entry (11) of ring chamber (10) intercommunication.

5. The cracked gas conduit of claim 4, wherein: the inner wall of the liquid spraying opening (8) is provided with a spiral groove (17).