Material processing furnace

Abstract

The utility model aims to provide the material processing furnace comprising the sealing mechanism capable of improving the sealing performance of the furnace body. The material processing furnace comprises a furnace body sealing cavity comprising a barrel, a first end cover and a second end cover; the rotating shaft can rotate relative to the furnace body sealing cavity, and a first end part and a second end part of the rotating shaft respectively extend out of the furnace body sealing cavity through a first through hole and a second through hole which are formed in the first end cover and the second end cover and are respectively supported in the first bearing seat and the second bearing seat by utilizing a first bearing and a second bearing; the first bearing seat and the second bearing seat are respectively fixed on the outer sides, deviating from the furnace body sealing cavity, of the first end cover and the second end cover; and the first sealing mechanism is arranged at the first end part of the rotating shaft. The first sealing mechanism comprises a stuffing box, the stuffing box is fixed in a first through hole in the first end cover and arranged in the mode of surrounding the first end of the rotating shaft, the stuffing box is located between the first bearing and the barrel in the axial direction of the rotating shaft, and the rotating shaft is rotationally sealed in the stuffing box.

Description

Technical Field

[0001] The utility model relates to the field of petrochemical material processing, in particular to a material processing furnace. Background Art

[0002] In recent years, with the large-scale exploration and development of oil, natural gas, shale gas, etc., a large amount of oil-containing cuttings will be generated during the drilling operation of the drilling rig. These cuttings contain oil, clay, various chemical treatment agents, weighting materials, dirty oil, sewage, etc. The composition is complex and they are hazardous wastes. They have the characteristics of high oil content and many organic pollutants. According to statistics, the amount of oil-containing cuttings generated in a single well is about 300m 3 ~400m 3 If it is not handled properly, it will cause pollution to the environment, so it needs to be treated and disposed of in a timely manner.

[0003] At present, thermal desorption technology, which is one of the main treatment methods for oil-containing drill cuttings, is a solid and gas separation method. Its principle is based on the difference in volatility of substances at different temperatures. By controlling the heating temperature of the substance to reach the desorption temperature, the separation of the substance is achieved, that is, under anaerobic conditions, the material in the thermal desorption furnace is indirectly heated to reach the boiling point of the volatile substances in the material, so that the oil is volatilized and removed from the material, and then the volatilized oil is condensed and recovered. Such thermal desorption technology can achieve harmless treatment and resource utilization of oil-containing drill cuttings, and is usually implemented in a material treatment furnace.

[0004] The boiling point of oil-containing drill cuttings is high under normal pressure, and the material needs to be heated to a higher temperature in the material processing furnace for distillation. In order to solve this problem, the material processing furnace is often pumped to a negative pressure, which can reduce the boiling points of substances such as water and oil, thereby reducing the heating temperature in the material processing furnace. If the sealing performance of the furnace body of the material processing furnace is not good, it is impossible to form a negative pressure for vacuum distillation. The high temperature during distillation will cause the organic matter to be easily cracked, so the oil content in the drill cuttings residue discharged from the discharge port is high, which is not conducive to the recovery of oil. On the contrary, the higher the sealing performance of the furnace body of the material processing furnace, the better the negative pressure effect generated when the fan is used for negative pressure suction (or the higher the vacuum degree generated), and it can also extend the duration of the furnace body in the sealed state and reduce the frequency of starting the fan. Therefore, under the existing technical conditions and processing capabilities (the negative pressure range of the prior art is 70kPa to 100kPa), it is particularly important to improve the sealing performance of the furnace body of the material processing furnace as much as possible. Utility Model Content

[0005] [Technical issues to be solved]

[0006] In view of the above situation, the purpose of the utility model is to provide a material processing furnace with a sealing mechanism that can effectively improve the sealing performance of the furnace body.

[0007] [Technical solution to the problem]

[0008] The above object is achieved by a material processing furnace according to an embodiment of the present invention.

[0009] The material processing furnace according to the embodiment of the utility model comprises: a furnace body sealed cavity including a barrel, a first end cover and a second end cover; a rotating shaft capable of rotating relative to the furnace body sealed cavity, wherein the first end and the second end of the rotating shaft extend out of the furnace body sealed cavity through a first through hole provided in the first end cover and a second through hole provided in the second end cover respectively and are supported in a first bearing seat and a second bearing seat respectively by means of a first bearing and a second bearing, wherein the first bearing seat and the second bearing seat are respectively fixed on the outer side of the first end cover and the second end cover away from the furnace body sealed cavity; and a first sealing mechanism, which is arranged at the first end of the rotating shaft. Moreover, the first sealing mechanism comprises: a stuffing box, which is fixed in the first through hole in the first end cover and is arranged in a manner of surrounding the first end of the rotating shaft, wherein the stuffing box is located between the first bearing and the barrel in the axial direction of the rotating shaft, and the rotating shaft is rotatably sealed in the stuffing box.

[0010] In the above embodiment, the first sealing mechanism may further include: a labyrinth sealing component disposed on the first end cover. Moreover, the labyrinth sealing component extends from the first end cover toward the furnace body sealing cavity in a manner concentric with the rotating shaft until the labyrinth seal disposed in the inner peripheral surface of the labyrinth sealing component contacts the outer peripheral surface of the rotating shaft.

[0011] In the above embodiment, the stuffing box may include a stuffing box fixedly connected to the first through hole in the first end cover, and a space is formed between the inner circumferential surface of the stuffing box and the outer circumferential surface of the first end portion of the rotating shaft. Moreover, the space can be filled with a stuffing so that the rotating shaft is rotatably sealed in the stuffing box.

[0012] In the above embodiment, the stuffing box may further include: a pressure cover detachably disposed at the box opening of the stuffing box, one end of the pressure cover being able to move in the stuffing box along the axial direction of the rotating shaft.

[0013] In the above embodiment, an adjusting bolt may be provided on the gland, and the adjusting bolt is installed into the gland from the other end of the gland opposite to the one end in the axial direction of the rotating shaft.

[0014] In the above embodiment, an oil filling hole can be provided through the wall of the stuffing box, an oil ring can be provided at a position corresponding to the oil filling hole in the stuffing box, and an oil seal can be formed at the oil ring after lubricating grease is injected through the oil filling hole.

[0015] In the above embodiment, a sleeve may be fixedly mounted on the first end of the rotating shaft in a manner of surrounding the first end, and the stuffing box surrounds the sleeve. In addition, the sealing mechanism may further include: first and second sealing rings disposed between the inner circumferential surface of the sleeve and the outer circumferential surface of the first end of the rotating shaft, and the first and second sealing rings are disposed close to both ends of the sleeve, respectively.

[0016] In the above embodiment, the box bottom of the stuffing box is located on the side opposite to the box opening. At the bottom surface of the box bottom of the stuffing box facing the stuffing, a third sealing ring can be arranged between the inner peripheral surface of the stuffing box and the outer peripheral surface of the shaft sleeve in a radially tight fit manner.

[0017] In the above embodiment, the first end of the rotating shaft may be a first shaft head that is made separately and has a diameter smaller than that of the rotating shaft. End plates with the same diameter may be provided at one end where the first shaft head and the rotating shaft are joined to each other, and the first shaft head and the rotating shaft are joined to each other through the end plates. Moreover, the inner peripheral surface of the labyrinth seal component is in rotational contact with the outer peripheral surface of the end plate of the first shaft head.

[0018] In the above embodiment, the second end portion of the rotating shaft may be identical to the first end portion, and a second sealing mechanism identical to the first sealing mechanism may be provided at the second end portion of the rotating shaft.

[0019] In the above embodiment, the second end cover may be replaced with an arc-shaped housing. A bearing gland may be provided at a position away from the first end cover toward the outside by a predetermined distance in the axial direction of the rotating shaft so as to surround the first end portion of the rotating shaft. Furthermore, the first bearing seat may be fixed to the side of the bearing gland opposite to the first end cover side by fastening bolts, and the second bearing seat may be fixed to the outside of the housing by welding.

[0020] In the above embodiment, a spacer may be provided between the bearing cover and the first end cover, and the spacer connects the bearing cover and the end cover.

[0021] In the above embodiment, the first end of the rotating shaft can be externally connected to a power device after extending from the first bearing seat. The outer end of the second bearing seat can be detachably sealed by a blind cover through a flange. Moreover, a hand hole can be provided on the second bearing seat, and the hand hole is detachably sealed by a hand hole flange.

[0022] In the above embodiment, a dust cover may be provided at a position outside the first bearing in the axial direction of the rotating shaft in a manner surrounding the first end of the rotating shaft. The first bearing may be accommodated in a space defined by the dust cover, the first bearing seat, the bearing pressure cover, and the first end of the rotating shaft. Furthermore, a fourth sealing ring may be provided in the inner circumferential surface of the dust cover, and the fourth sealing ring surrounds the first end of the rotating shaft in a manner of radial press fit.

[0023] In the above embodiment, it can also include: at least one observation hole, which can be a pipe penetrating from the wall of the furnace body sealed cavity, and the outward end of the observation hole can be detachably sealed by a flange with a blind cover or a transparent observation window.

[0024] In the above embodiment, it may further include: a gas outlet, which may be a pipeline penetrating from the upper side wall of the furnace body sealed cavity, and the outward end of the gas outlet may be connected to a subsequent processing device via a sealed butterfly valve. Moreover, the subsequent processing device may include a fan.

[0025] In the above embodiment, the subsequent processing equipment may also include at least one of filtering equipment, pulse dust removal equipment, condensation separation equipment, spraying equipment, recovery equipment, and discharge equipment.

[0026] In the above embodiment, it may further include: a discharge port, which may be a pipe penetrating from the lower side wall of the furnace body sealed cavity, and the outward end of the discharge port may be connected to a discharge device via a ball valve. Moreover, the discharge device may cool, process, discharge or recycle the solid product discharged from the discharge port.

[0027] In the above embodiment, it may further include: a feed port, which may be a pipe penetrating from the upper side wall of the furnace body sealed cavity, and the outward end of the feed port may be connected to a hopper for holding materials via a ball valve.

[0028] In the above embodiment, it may further include: a purge port, which may be a pipe penetrating from the wall of the sealed cavity of the furnace body, for blowing inert gas. Moreover, the outward end of the purge port is connected to an inert gas source via a sealing butterfly valve.

[0029] [Beneficial Effects]

[0030] (1) Sealing structures such as ball valves and sealing butterfly valves are preferably provided at the feed inlet, solid product discharge port and gas outlet of the furnace body, respectively, to ensure that external gas does not leak into the furnace body when negative pressure is drawn into the furnace body; thereby, the furnace body can be configured as a furnace body sealed chamber.

[0031] When the furnace sealed chamber is working, the fan is first used to suck the furnace sealed chamber to form a negative pressure. The beneficial effects produced by the negative pressure suction are as follows: A. Compared with the equipment under normal pressure, the boiling point of water and oil in the material can be reduced under negative pressure, thereby improving the distillation effect in the furnace sealed chamber; B. Since the boiling point is lowered, the heating temperature during distillation can be reduced, thereby reducing the energy consumption of the furnace sealed chamber; C. Since the heating temperature during the distillation process is lower than the heating temperature of the equipment under normal pressure, it can reduce the chance of oil cracking at high temperature (the higher the temperature, the more gas will be produced by cracking), thereby improving the quality of the recovered oil.

[0032] (2) In order to ensure that the furnace body is in a negative pressure state or to achieve a better negative pressure effect, on the one hand, a fan is used to suck the furnace body sealing cavity; on the other hand, a rotary sealing mechanism is provided at the relative rotation position between the furnace body sealing cavity and the rotating shaft, a valve with good airtightness such as a ball valve is provided at the feed inlet and discharge port of the cylinder, and a valve with good airtightness such as a three-eccentric wafer butterfly valve is provided at the purge port and gas outlet of the cylinder, or a combination of the above measures is used to improve the overall sealing performance of the furnace body sealing cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a perspective view showing a configuration example of a material processing furnace including a sealing mechanism according to the first embodiment of the present invention.

[0034] Figure 2 is Figure 1 The enlarged perspective view of the part near the driving end head of the material handling furnace is shown.

[0035] Figure 3 is Figure 1 The shown is a partial enlarged stereoscopic view of the vicinity of the driven end head of the material processing furnace.

[0036] Figure 4 Shown with Figure 1 Corresponding cross-section of a material handling furnace.

[0037] Figure 5 Shown with Figure 2 The corresponding cross-sectional view near the drive end head.

[0038] Figure 6 Shown with Figure 3 The corresponding cross-sectional view near the driven end head.

[0039] Figure 7 1 is a schematic block diagram showing a configuration example of a material processing furnace including a sealing mechanism according to a second embodiment of the present invention.

[0040] [reference numerals list]

[0041] 1.1a: Material handling furnace; 2: Purge port; 3: Feed port; 4: Feed valve

[0042] 5: Gas outlet; 6: Subsequent processing equipment; 7: Discharge port; 8: Discharge valve

[0043] 9: Motor; 10, 10a: Cylinder; 11: Observation hole; 15, 17: (third) sealing ring

[0044] 20: Shell of driven end head; 21: Driven end bolt group; 22: Driven end bearing seat

[0045] 23: driven end bearing; 24: hand hole; 25: hand hole flange; 26: flange bolt

[0046] 200: driven end stuffing box; 201: stuffing box; 202: stuffing; 203: gland

[0047] 30: End cover of the drive end head; 31: Drive end bolt group; 32: Drive end bearing seat

[0048] 33: drive end bearing; 34: bearing gland; 35: (fourth) sealing ring; 36: shaft sleeve

[0049] 37: Fastening screw; 38: (first and second) sealing rings; 39: Spacer

[0050] 41: Oil filling hole; 42: Oil ring; 44: Adjusting bolt; 47: Labyrinth seal component

[0051] 300: driving end stuffing box; 301: stuffing box; 302: stuffing; 303: gland

[0052] 40, 40a: stirring shaft or mandrel; 402, 402a: driven end shaft head

[0053] 403, 403a: Drive end shaft DETAILED DESCRIPTION

[0054] The specific implementation scheme of the present utility model will be described in detail below with reference to the accompanying drawings.

[0055] Figure 1is a perspective view showing a configuration example of a material processing furnace including a sealing mechanism according to a first embodiment of the present utility model, Figure 2 is Figure 1 The enlarged perspective view of the driving end of the material handling furnace shown in FIG. Figure 3 is Figure 1 The enlarged stereoscopic view of the part near the driven end head of the material handling furnace shown in FIG. Figures 1 to 3 As shown, the material processing furnace 1 of the first embodiment of the present utility model includes a cylinder 10. The first end ( Figure 1 The left end of the cylinder 10 may be provided with a first flange, and the first flange is connected to the end cover 30 of the drive end head through a group of bolts (i.e., the drive end bolt group 31), so that the first end is sealed by the drive end head. Figure 1 The right end of the cylinder 10 (in the figure) may be provided with a second flange, and the second flange is connected to the housing 20 of the driven end head through a group of bolts (i.e., the driven end bolt group 21), so the second end is sealed by the driven end head. Thus, the furnace body sealing chamber is formed as a whole by the cylinder 10, the end cover 30 of the driving end head and the housing 20 of the driven end head.

[0056] exist Figure 1 In the example, the end cover 30 is disc-shaped and the shell 20 is arc-shaped, but the utility model is not limited to this. The driven end head including the shell 20 can be applicable to the driving end head, and the driving end head including the end cover 30 can also be applicable to the driven end head.

[0057] A gas outlet 5 may be provided on the cylinder wall of the cylinder 10. When the furnace sealed chamber needs to work under negative pressure, a fan (not shown) may be used to suck the furnace sealed chamber through the gas outlet 5 to form a negative pressure. In addition, the gas product generated after the material is processed in the furnace sealed chamber may also be discharged to the subsequent processing equipment through the gas outlet 5. In addition to using the above-mentioned fan to suck the furnace sealed chamber to form a negative pressure, the subsequent processing equipment may also perform subsequent processing on the distillate gas discharged from the furnace sealed chamber to improve the quality of the recovered oil. Examples of subsequent processing equipment may include, for example: the above-mentioned fan, filtering equipment, pulse dust removal equipment for blowing and dust removal on the filter element in the filtering equipment, condensation separation equipment, spraying equipment, discharge equipment or recovery equipment, etc., or any combination thereof.

[0058] Preferably, the gas outlet 5 is provided in the form of a pipeline that penetrates the upper side wall of the cylinder 10. A flange may be provided on the outward side of the gas outlet 5, and a flange may also be provided on the inlet side of the subsequent processing equipment, and the two flanges are fastened together by a set of flange bolts. Preferably, an O-ring may be provided between the two flanges to improve the airtightness of the joint between the two flanges relative to the outside of the sealed cavity. Preferably, the pipeline for forming the gas outlet 5 may be formed integrally with the cylinder 10.

[0059] In addition, a discharge port 7 may be provided on the cylinder wall of the cylinder 10. The solid product generated after the material is processed in the sealed chamber of the furnace body can be discharged to the discharge device (not shown) through the discharge port 7. Preferably, the discharge port 7 is provided in the form of a pipeline that penetrates the lower side wall of the cylinder 10. Preferably, the pipeline used to constitute the discharge port 7 can be formed integrally with the cylinder 10. Similar to the above-mentioned subsequent processing equipment, the inlet side of the discharge device and the discharge port 7 can be fastened together by means of a flange and flange bolts. The discharge device can be mainly used for cooling the solid product discharged from the discharge port 7.

[0060] Preferably, at least one observation hole 11 may be provided on the cylinder wall of the cylinder 10. The observation hole 11 may be provided in the form of a pipe that penetrates the cylinder wall of the cylinder 10. Preferably, the pipe used to form the observation hole 11 may be formed integrally with the cylinder 10. The number of the observation holes 11 is preferably such that at least the staff can observe or touch all the key areas in the cylinder 10.

[0061] As an example, a flange may be provided on the outward side of the observation hole 11, and a blind cover (not shown) may be detachably mounted on the flange using a set of flange bolts for sealing. Since the blind cover can be easily removed from the observation hole 11, the inside of the cylinder 10 can be conveniently observed and inspected through the observation hole 11. Further, the blind cover may be replaced with an observation window, which may be made of a high-temperature resistant transparent material such as tempered glass. Thus, the conditions of the various components disposed inside the cylinder 10 and the progress of the material processing process inside the cylinder 10 can be directly observed at any time through the observation window and the observation hole 11 without disassembly. In addition, since the observation window can be easily removed from the observation hole 11, the inside of the cylinder 10 can be conveniently further observed and inspected through the observation hole 11.

[0062] Figure 4 Shown with Figure 1 The corresponding cross-section of the material handling furnace. In order to avoid too many shadow lines hindering the visibility of the figure, Figure 4 Some hatching is omitted (the details of the omissions can be found in the following description). Figure 5 and Figure 6 ).like Figure 4 As shown, a core shaft 40 is arranged in the cylinder 10 along its central axis (i.e., the axial direction of the cylinder 10), and the core shaft 40 can be a rotating shaft that can rotate relative to the cylinder 10. When the material is processed in the material processing furnace 1, it is usually necessary to prevent the material from being hardened, attached or retained in the furnace sealing cavity. For this reason, the core shaft 40 can be designed as a stirring shaft 40. The first end ( Figure 4 The left end in the middle) is fixedly connected to the drive end shaft head 403, and the second end ( Figure 4 The right end portion in the figure) is fixedly connected to the driven end shaft head 402.

[0063] In the case of an example where the drive end shaft head 403 and the driven end shaft head 402 are not provided, the first end and the second end of the stirring shaft 40 can each continue to extend to serve as the drive end shaft head and the driven end shaft head. In the case of an example where the drive end shaft head 403 and the driven end shaft head 402 are provided, the diameter of each of the drive end shaft head 403 and the driven end shaft head 402 can be the same as or different from the diameter of the stirring shaft 40. What is shown in the present utility model is an example where the diameter of each of the drive end shaft head 403 and the driven end shaft head 402 is smaller than the diameter of the stirring shaft 40. At this time, end plates of the same size can be respectively provided at the right end of the drive end shaft head 403 and the first end of the stirring shaft 40 for mutual engagement, and end plates of the same size can be respectively provided at the left end of the driven end shaft head 402 and the second end of the stirring shaft 40 for mutual engagement.

[0064] A drive end bearing seat 32 is provided at the drive end shaft head 403, and the drive end bearing 33 is installed inside the drive end bearing seat 32 and located between the drive end bearing seat 32 and the drive end shaft head 403. Figure 2 and Figure 4 It can be seen that, at a position away from the end cover 30 toward the outside at a predetermined distance in the axial direction of the central axis of the furnace body sealing cavity (i.e., the axial direction of the stirring shaft 40), a bearing cover 34 is provided in a manner of surrounding the drive end shaft head 403. The drive end bearing seat 32 is fastened to the side of the bearing cover 34 opposite to the end cover 30 side by bolts.

[0065] A spacer 39 may be provided between the end cover 30 and the bearing cover 34, and the spacer 39 connects the end cover 30 and the bearing cover 34. An example of the spacer 39 is: Figure 2 and Figure 5As shown, a plurality of radial ribs parallel to the radial direction of the drive end shaft head 403 are arranged at regular or irregular intervals on the circumference of the drive end shaft head 403. As another example of the spacer 39, a hollow box body such as a cylinder or a rectangular parallelepiped that connects the end cover 30 and the bearing cover 34 can be provided, and a plurality of vertical, horizontal or radial ribs can be further arranged on the outer wall of the hollow box body, and these ribs are connected to the end cover 30 to play the role of reinforcing ribs.

[0066] A driven end bearing seat 22 is provided at the driven end shaft head 402, and a driven end bearing 23 is installed inside the driven end bearing seat 22 and located between the driven end bearing seat 22 and the driven end shaft head 402. The driven end bearing seat 22 is connected to the housing 20 of the driven end head by welding, for example. Figure 3 and Figure 4 It can be seen that a hand hole 24 can be provided on the driven end bearing seat 22 at the driven end shaft head 402, and the hand hole flange 25 is fastened to the hand hole 24 by flange bolts 26. By conveniently removing the hand hole flange 25, the driven end bearing 23 can be conveniently installed and maintained through the hand hole 24. A blind cover is installed at one end of the driven end bearing seat 22 open to the outside by means of a flange and flange bolts (see later). Figure 6 ), and thus was sealed by a cover.

[0067] In the case where the furnace body sealed cavity needs to be sucked to form a negative pressure as mentioned above, the furnace body sealed cavity is required to have a high overall sealing performance. The sealing mechanism of the furnace body sealed cavity includes not only the sealing ring, valve or cover as the basic sealing structure provided at the gas outlet 5, the discharge port 7, the observation hole 11, the hand hole 24, etc., but also includes a rotating sealing mechanism between the stirring shaft 40 and the furnace body sealed cavity (specifically, the driving end shaft head 403 of the stirring shaft 40 relative to the end cover 30, and the driven end shaft head 402 of the stirring shaft 40 relative to the housing 20).

[0068] [Rotary sealing mechanism]

[0069] Here we first explain the reason why a rotary sealing mechanism is required. Figure 4As shown, the right end of the drive end shaft head 403 is fixedly connected to the first end of the stirring shaft 40 in the inner cavity of the cylinder 10, and the left end extends to pass through the through hole in the first flange of the cylinder 10, the through hole in the end cover 30 of the drive end head, and the through hole in the bearing cover 34 in sequence, and is accommodated in the drive end bearing seat 32 with the drive end bearing 33 as the contact medium, and the left end continues to extend to be externally connected to the power device (such as the motor and gear transmission assembly not shown). In addition, the shell 20 of the driven end head has an arc-shaped cross-section to form an inner cavity, and the left end of the driven end shaft head 402 is fixedly connected to the second end of the stirring shaft 40 in the inner cavity of the shell 20, and the right end extends to pass through the through hole in the shell 20 and is accommodated in the driven end bearing seat 22 with the driven end bearing 23 as the contact medium.

[0070] The example described above is a case where the barrel 10 is fixed and the stirring shaft 40 rotates in the barrel 10. In an alternative example, the mandrel 40 can be fixed and the barrel 10 rotates around the mandrel 40. In another alternative example, the mandrel 40 and the barrel 10 can both rotate, and the rotation directions of the two are opposite, or the rotation directions of the two are the same but the speeds are different. Regardless of which of the above cases, at both the driving end and the driven end, it is involved to use bearings to support the mandrel 40 (specifically, the driven end shaft head 402 and the driving end shaft head 403) in the bearing seat and enable the mandrel 40 and the barrel 10 to rotate relative to each other.

[0071] In the present invention, in order to facilitate the inspection and replacement of the driven end bearing 23 and the driving end bearing 33, they are placed outside the furnace body sealing cavity. For the furnace body sealing cavity that requires vacuuming, it is particularly necessary to improve the sealing performance of the furnace body when using such an external bearing. Therefore, the present invention provides a newly designed sealing mechanism that can improve the sealing performance of the furnace body. The rotary sealing mechanism of the present invention may include a rotary sealing structure at the bearing, and a stuffing box sealing structure and a labyrinth sealing structure near the bearing.

[0072] The driving end sealing mechanism and the driven end sealing mechanism of the utility model will be described in turn below.

[0073] [Drive end sealing mechanism]

[0074] Figure 5 Shown with Figure 2 The corresponding cross-sectional view near the drive end head. Figure 4 and Figure 5 The utility model has at least the following first, second and third rotational contact positions at the driving end.

[0075] The first rotational contact position refers to the rotational contact position at the bearing, that is: the drive-end bearing 33 includes an inner ring, an outer ring, rolling elements, a retaining frame and lubricating grease, the inner ring is tightly fitted on the outer circumferential surface of the drive-end shaft head 403, the outer ring is loosely fitted in the hole of the drive-end bearing seat 32 to support the drive-end shaft head 403, and the outer ring and the inner ring rotate relative to each other with the rolling elements as the rolling medium and the contact medium.

[0076] The second rotational contact position means that a driving end stuffing box 300 (see FIG. 1 ) is arranged in the through hole of the end cover 30 in a manner surrounding the outer peripheral surface of the driving end shaft head 403. Figure 4 ), the stuffing box 300 includes a stuffing box 301, the outer peripheral surface of the stuffing box 301 is fixed in the through hole of the end cover 30, for example, by welding; the inner peripheral surface of the stuffing box 301 and the outer peripheral surface of the drive end shaft head 403 are separated by a predetermined distance in the radial direction of the drive end shaft head 403 to form a space, and the space can be filled with a stuffing 302, and the stuffing 302 and the outer peripheral surface of the drive end shaft head 403 are in rotational contact with each other.

[0077] The third rotational contact position refers to the point where the outer peripheral surface of the end plate at the right end of the drive end shaft head 403 is in contact with the sealing component (see Figure 5 The labyrinth seal components 47 (to be described later) are in rotational contact with each other.

[0078] In the utility model, by including a driving end sealing mechanism for performing rotational sealing on the above-mentioned first, second and third rotational contact positions, it is possible to prevent leakage of oil-containing hazardous solid products in the furnace body sealing chamber on the one hand, and to prevent outside air from entering the furnace body sealing chamber when vacuuming on the other hand.

[0079] At the first rotational contact position, the outer circumferential surface of the drive-end shaft head 403 is in an assembly relationship with the inner circumferential surface of the inner ring of the drive-end bearing 33, and the drive-end bearing 33 is preferably a spherical roller bearing.

[0080] The drive end bearing seat 32 and the bearing cover 34 are in an assembly relationship, and the two are fastened together by bolts, thereby forming a first sealing structure at the bearing; between the outer peripheral surface of the drive end shaft head 403 and the inner peripheral surface of the through hole in the bearing cover 34, a second sealing structure at the bearing is formed; in addition, at the outside of the drive end bearing 33, specifically, on the dust cover for protecting the drive end bearing 33 arranged in a manner surrounding the drive end shaft head 403, a sealing ring 35 is also arranged, and the sealing ring 35 is located in the inner peripheral surface of the dust cover, thereby forming a third sealing structure at the bearing. The sealing ring 35 is clamped on the drive end shaft head 403 in a radially tight fit manner to prevent the lubricating grease at the drive end bearing 33 from leaking to the outside and to prevent the outside dust from entering the drive end bearing 33. The drive end shaft head 403 is rotatably sealed in the sealing ring 35.

[0081] At the above-mentioned second rotational contact position, the stuffing box 300 is located between the driving end bearing 33 and the furnace body sealing cavity in the axial direction of the driving end shaft head 403 to separate them.

[0082] By compacting the filler 302 in the filler box 301, a first sealing structure is formed at the filler box between the outer peripheral surface of the drive end shaft head 403 and the inner peripheral surface of the filler 302. The cross section of the filler box 301 is a flat bottom surface. The box bottom 301 is in the shape of a cylinder, and a through hole for the stirring shaft 40 to pass through is formed in the box bottom opposite to the box mouth. The box bottom can be formed integrally on the stuffing box 301, or it can be formed separately and then fixedly assembled to the stuffing box 301. Preferably, in addition to the stuffing box 301 and the stuffing 302, the stuffing box 300 can also include a pressure cover 303 detachably arranged at the box mouth of the stuffing box 301. The pressure cover 303 can be used to prevent the stuffing 302 from falling off from the stuffing box 301, and the stuffing 302 in the stuffing box 301 can be further compacted through the box mouth of the stuffing box 301 along the axial direction of the drive end shaft head 403 to improve the sealing effect of the stuffing. Further preferably, an adjusting bolt 44 can be provided on the side of the pressure cover 303 opposite to the side of the stuffing 302. The adjusting bolt 44 is used in conjunction with the pressure cover 303 to further adjust the sealing effect of the stuffing in the stuffing box 301, thereby forming a second sealing structure at the stuffing box. As Figure 5As shown, at the box bottom of the stuffing box 301 protruding in the radial direction toward the drive end shaft head 403 to contact with the drive end shaft head 403, a sealing ring 17 can also be arranged at the bottom surface of the box bottom facing the stuffing 302. The sealing ring 17 is, for example, a copper ring, which is arranged between the outer peripheral surface of the drive end shaft head 403 and the inner peripheral surface of the stuffing box 301 in a radial compression fit manner to prevent tiny solid particles or gas from the furnace body sealing cavity from invading the stuffing box 301. The sealing ring 17 constitutes the third sealing structure at the stuffing box. The drive end shaft head 403 is rotatably sealed in the sealing ring 17.

[0083] In order to reduce the influence caused by the high temperature in the furnace sealing cavity, a sleeve 36 can be further provided between the stuffing box 300 and the drive end shaft head 403. The sleeve 36 surrounds the drive end shaft head 403 and is fixedly connected to the outer peripheral surface of the drive end shaft head 403 by means of a fastening screw 37, and the stuffing box 301 and the stuffing 302 surround the sleeve 36. At this time, the sealing ring 17 is provided between the outer peripheral surface of the sleeve 36 and the inner peripheral surface of the stuffing box 301 in a radially tight fit manner. A sealing ring 38 is provided on the inner peripheral surface near both ends of the sleeve 36, that is, two sealing rings 38 are provided between the sleeve 36 and the drive end shaft head 403, which constitute the fourth sealing structure at the stuffing box, thereby enhancing the sealing effect at the stuffing box 300.

[0084] Preferably, a channel that penetrates the wall of the stuffing box 301 and reaches the stuffing 302 can be provided as an oil filling hole 41. Lubricating grease can be added to the stuffing 302 in the stuffing box 301 through the oil filling hole 41, which can increase the lubrication effect, reduce the wear of the agitator shaft on the stuffing, and increase the service life of the stuffing box 300.

[0085] In the sealing structure formed by the stuffing box 300, the pressure on the packing 302 is unevenly distributed along the axial direction of the stuffing box 300. The pressure is highest near the gland 30, and the pressure gradually decreases as it moves away from the gland 30, which leads to uneven wear of the packing, and the packing closer to the gland 30 is more susceptible to damage. In order to solve this problem, the utility model can be provided with an oil ring 42 at a position aligned with the oil injection hole 41 in the stuffing box 301. The oil ring 42 can be made of carbon steel or stainless steel. The oil ring 42 is preferably arranged in the middle of the stuffing box 301 in the axial direction, so as to improve the uneven distribution of the pressure on the packing in the axial direction, thereby reducing the wear of the packing.

[0086] After the lubricating grease is injected through the oil injection hole 41, an oil seal is formed at the position of the oil ring 42. When the fan is used to suck to form a negative pressure, the oil seal can reduce the entry of external air into the furnace body sealing cavity. Therefore, the oil seal formed at the oil ring 42 can constitute the fifth sealing structure at the stuffing box, which can also improve the sealing effect at the stuffing box, thereby improving the sealing performance of the furnace body.

[0087] At the third rotational contact position, a labyrinth seal component 47 is provided on the end cover 30 in a manner concentric with the drive end shaft head 403. The labyrinth seal component 47 extends along the axial direction of the cylinder 10 to pass through the through hole of the first flange of the cylinder 10 and then extends into the inner cavity of the cylinder 10. The inner circumferential surface of the labyrinth seal component 47 and the outer circumferential surface of the end plate at the right end of the drive end shaft head 403 are in rotational contact with each other. The labyrinth seal provided in the inner circumferential surface of the labyrinth seal component 47 can enhance the sealing effect of the drive end shaft head 403 relative to the furnace body sealing cavity, thereby reducing the occurrence of the situation where tiny particles of solid phase materials invade the stuffing box 300.

[0088] In the case where the drive end shaft head 403 is not provided, the first end of the stirring shaft 40 continues to extend to serve as the drive end shaft head, and the above-mentioned end plate protruding outward in the radial direction may not be provided. In this case, the labyrinth seal component 47 is not in contact with the outer peripheral surface of the end plate, but is provided on the end cover 30 of the drive end head in a manner concentric with the stirring shaft 40 and in contact with the outer peripheral surface of the stirring shaft 40.

[0089] The driving end sealing mechanism of the utility model comprises at least one sealing structure at each of the first, second and third rotation contact positions or any combination thereof, thereby obtaining a driving end sealing mechanism with high air tightness.

[0090] [Driver end sealing mechanism]

[0091] Figure 6 Shown with Figure 3 The corresponding cross-sectional view near the driven end seal head. At the driven end, the utility model has at least the following fourth and fifth rotational contact positions.

[0092] The fourth rotational contact position refers to the rotational contact position at the bearing, that is, the driven end shaft head 402 is supported in the driven end bearing seat 22 with the driven end bearing 23 as the contact medium, and the outer peripheral surface of the driven end shaft head 402 and the inner ring of the driven end bearing 23 are in rotational contact with the outer ring of the driven end bearing 23 with the rolling body as the rolling medium and the contact medium. This can be similar to the first rotational contact position at the drive end bearing 33, and will not be repeated here.

[0093] The fifth rotational contact position means that a driven end stuffing box 200 is arranged in the through hole of the housing 20 in a manner surrounding the outer peripheral surface of the driven end shaft head 402 (see Figure 4 The stuffing box 200 includes a stuffing box 201, and the outer peripheral surface of the stuffing box 201 is fixed in the through hole of the housing 20 by welding, for example.

[0094] The stuffing box 200 is located between the driven end bearing 23 and the furnace body sealing cavity in the axial direction of the driven end shaft head 402 to separate them. The cross section of the stuffing box 201 is a flat bottom surface. The box bottom 201 is a box-shaped box, and a through hole for the stirring shaft 40 to pass through is formed in the box bottom opposite to the box mouth. The box bottom can be formed integrally on the stuffing box 201, or it can be formed separately and then fixedly assembled to the stuffing box 201. Preferably, in addition to the stuffing box 201 and the stuffing 202, the stuffing box 200 can also include a pressure cover 203 arranged at the box mouth of the stuffing box 201. The pressure cover 203 can be used to prevent the stuffing 202 from falling off the stuffing box 201, and the stuffing 202 in the stuffing box 201 can be compacted through the box mouth of the stuffing box 201 along the axial direction of the driven end shaft head 402 to improve the sealing effect of the stuffing. More details of the stuffing box 200 can be similar to the aforementioned driving end stuffing box 300, which will not be repeated here.

[0095] Similar to the shaft sleeve 36 arranged on the driving end shaft head 403 at the driving end, the two sealing rings 38 arranged on the shaft sleeve 36, the adjusting bolt 44 arranged on the pressure cover 303, the oil filling hole 41 and the oil ring 42 arranged in the stuffing box 301, the dust cover arranged on the outside of the bearing 33, the sealing ring 35 arranged in the dust cover, and the labyrinth sealing component 47 arranged on the end cover, etc., any combination of these components can be arranged at the driven end as needed, and they play the same role as at the driving end.

[0096] like Figure 6 As shown, at the bottom of the stuffing box 201 protruding in the radial direction toward the driven end shaft head 402 to contact with the driven end shaft head 402, a sealing ring 15 can also be arranged at the bottom surface of the box bottom facing the stuffing 202. The sealing ring 15 is, for example, a copper ring, which is arranged on the outer peripheral surface of the driven end shaft head 402 (if a shaft sleeve is arranged on the driven end shaft head 402, it refers to the outer peripheral surface of the shaft sleeve here) in a radial compression fit manner to prevent tiny solid particles or gas from the furnace body sealing cavity from invading the stuffing box 201. The sealing ring 15 also constitutes a sealing structure at the stuffing box 200. The driven end shaft head 402 is rotatably sealed in the sealing ring 15.

[0097] The driven end sealing mechanism may include any combination of the following: a stuffing box 200 located between the driven end bearing 23 and the furnace body sealing cavity, which constitutes the first seal of the driven end; a driven end bolt group 21 that fastens the cylinder 10 of the furnace body sealing cavity with the shell 20, which constitutes the second seal of the driven end; a hand hole flange 25 fixedly installed at the hand hole 24 by flange bolts 26, which constitutes the third seal of the driven end; a seal of the driven end bearing seat 22 toward the outside through a blind cover, which constitutes the fourth seal of the driven end; and a welding connection of the driven end bearing seat 22 relative to the shell 20, which constitutes the fifth seal of the driven end. In this way, a driven end sealing mechanism with high airtightness is obtained.

[0098] The following will describe an application example of the sealing mechanism of the present invention.

[0099] [Material handling furnace]

[0100] The oily drill cuttings generated by the drilling rig during the drilling operation can be discharged after being processed by the oily drill cuttings processing device. The sealing mechanism of the utility model as described above can be applied to the oily drill cuttings processing device, specifically, to the material processing furnace 1a of the oily drill cuttings processing device.

[0101] Figure 7 1 is a schematic block diagram showing a configuration example of a material processing furnace including a sealing mechanism according to a second embodiment of the present invention. Figure 7 As shown, the material processing furnace 1a of the utility model comprises a furnace body sealed cavity composed of a cylinder 10a, a shell 30a of a driving end head and a shell 20a of a driven end head. A rotating shaft is arranged in the furnace body sealed cavity along the central axis (i.e., the axial direction) of the furnace body sealed cavity, which may be a stirring shaft (also called a core shaft) 40a. Figure 7 The drive end head and driven end head shown in are similar to Figure 4 The driven end cap in the figure, but any or all of them can also be replaced by Figure 4 The driving end head in the embodiment, at this time, the shell 20a and / or the shell 30a is replaced by the end cover 30 in the first embodiment.

[0102] A feed port 3 may be provided on the material processing furnace 1a. The feed port 3 penetrates the upper side wall of the cylinder 10a in the form of a pipeline and is connected to the sealed cavity of the furnace body. A feed valve 4 may be further provided on the feed port 3 to control the opening and closing of the feed port 3 and the feed flow rate in the feed port 3. In addition, a feed device including a hopper may be provided upstream of the feed port 3, and the material pre-treated in the feed device (for example, removing impurities or screening out large particles) is fed into or stored in the hopper, and then fed into the sealed cavity of the furnace body through the feed port 3 when the feed valve 4 is open. In this way, the material can be subjected to thermal phase treatment such as heating and distillation in the sealed cavity of the furnace body.

[0103] After the material is processed in the sealed cavity of the furnace body, solid products and gas products are generally produced. For this reason, a solid product discharge port 7 and a gas outlet 5 are provided on the material processing furnace 1 to discharge the solid product and the gas product respectively. In addition to being able to discharge the gas product, the gas outlet 5 is also used as a gas extraction port when the sealed cavity of the furnace body is evacuated by a fan.

[0104] The discharge port 7 penetrates the lower side wall of the cylinder 10a in the form of a pipeline and is connected to the sealed cavity of the furnace body. A discharge valve 8 may be further provided on the discharge port 7 to control the opening and closing of the discharge port 7 and the discharge flow rate in the discharge port 7. A discharge device may be provided downstream of the discharge port 7 to perform treatments such as cooling, recovery or discharge on the solid product.

[0105] The gas outlet 5 penetrates the upper side wall of the cylinder 10a and is connected to the sealed cavity of the furnace body, and is located at a different position from the feed port 3. A subsequent processing device 6 may be provided downstream of the gas outlet 5. For example, the subsequent processing device 6 may include a fan to evacuate the sealed cavity of the furnace body. The subsequent processing device 6 may also include at least one filter element to filter the distillate gas discharged through the gas outlet 5. In order to prevent the dust in the distillate gas from clogging the filter holes and affecting the filtering effect of the filter element, the subsequent processing device 6 may also include a pulse dust removal system, which uses an inert gas to purge and remove dust from the filter element. In the subsequent processing device 6, a post-processing device for performing treatments such as condensation separation, spraying, recovery, and discharge on the distillate gas may be further provided, so that after removing the toxic and odorous components in the gas product, it can finally meet the standards for external discharge or recovery.

[0106] A purge port 2 may also be provided in the wall of the cylinder 10a. The purge port 2 may be a pipe penetrating the wall of the cylinder 10a, and may be provided at any position of the furnace body sealed cavity. Before subjecting the material to thermal distillation treatment, an inert gas (such as nitrogen, argon, etc.) may be blown into the furnace body sealed cavity from an inert gas source through the purge port 2 to deoxygenate the furnace body sealed cavity. After the thermal distillation treatment of the material is completed, the furnace body sealed cavity is in a negative pressure state, and an inert gas may be blown in through the purge port 2 to cause the furnace body sealed cavity to cool down and become a normal pressure state or a state close to normal pressure (such as a slightly positive pressure) as soon as possible, and then the discharge port 7 is opened for discharge.

[0107] An external heating device may be provided on the outer wall surface of the cylinder 10a, and additionally or alternatively, a mandrel heating device may be provided inside the mandrel 40a. Examples of heating methods of the two heating devices include electromagnetic heating, resistance heating, and heating by other heat carriers (heat-conducting oil, molten salt, high-temperature steam, etc.). The sealed cavity of the furnace body can be heated by the external heating device and the mandrel heating device, so that the material in the sealed cavity of the furnace body can be subjected to thermal distillation treatment.

[0108] The motor 9 drives the stirring shaft 40a through the gear transmission assembly and the drive end shaft head 403a, so that the stirring shaft 40a rotates relative to the furnace body sealing cavity, thereby rotating the stirring component arranged on the stirring shaft 40a and / or the breaking device arranged on the stirring shaft 40a or in the furnace body sealing cavity, so as to turn over, stir and break the material in the furnace body sealing cavity. In this way, it is possible to avoid the material from being compacted or the material from being attached or retained somewhere, and the material can be heated fully and evenly, thereby improving the heating effect of the external heating device and the core shaft heating device. The above-mentioned stirring component can be, for example, a stirring paddle, a material feeder or a rake tooth, or any combination thereof. The above-mentioned breaking device can be, for example, a chain, a vibrating ball, a steel ring, an eccentric steel ring, a vortex spring or a shock rod, or any combination thereof.

[0109] The operation flow of the material processing furnace 1a of the present invention is as follows: before the material feeding operation is performed, the discharge port 7 is first closed by using the discharge valve 8; when the stirring shaft 40a is rotating, the feed valve 4 is opened, and the material flows from the hopper into the furnace body sealed cavity through the feed port 3; after the material feeding operation is completed, the feed port 3 is closed by using the feed valve 4; the purge port 2 is opened, and the furnace body sealed cavity is deoxygenated by blowing inert gas, and then the purge port 2 is closed; then, the furnace body sealed cavity is sucked by the fan through the gas outlet 5 to form a negative pressure; under the negative pressure state, The material in the sealed cavity of the furnace body is heated and distilled; during the heating distillation, the fan is continued to be used for suction through the gas outlet 5, and the gaseous product after thermal phase separation (for example, containing evaporated water and evaporated oil) is also discharged through the gas outlet 5 to the subsequent processing equipment for treatment, recovery or environmental discharge; after the heating distillation is completed, the suction of negative pressure is stopped, and the purge port 2 is opened to blow in inert gas so that the sealed cavity of the furnace body becomes close to normal pressure (preferably slightly positive pressure); then, the discharge port 7 is opened by the discharge valve 8, and the solid product is discharged to the discharge equipment for further cooling, treatment, recovery or discharge.

[0110] The utility model can reduce the boiling point of water and oil in the material by performing heating distillation under negative pressure, thereby reducing the energy consumption of the material processing furnace 1a, and can also reduce the cracking gas generated by organic matter due to high temperature, thereby improving the quality of recovered oil.

[0111] In the present invention, during the period when the inlets and outlets such as the purge port 2, the feed port 3 and the discharge port 7 are closed to evacuate the furnace body sealed cavity, these inlets and outlets need to form a sealing structure together with the furnace body sealed cavity to prevent the leakage of external air into the furnace body sealed cavity. However, the feed valve 4 at the feed port 3 and the discharge valve 8 at the discharge port 7 will be reduced in sealing performance after long-term operation due to the wear of the materials. In the present invention, in order to meet the requirements of airtightness, the feed valve 4 and the discharge valve 8 are each preferably a ball valve with good airtightness, and more preferably an eccentric ball valve.

[0112] In addition, in the present invention, the purge port 2 and the gas outlet 5 also need to meet the airtightness requirements when they are in a closed state. For this reason, they can preferably be provided with sealing butterfly valves such as three-eccentric clamp butterfly valves. The three-eccentric clamp butterfly valve is composed of a valve body, a valve disc, a sealing ring and a valve shaft. There are three eccentricities between the valve disc and the valve shaft, namely, the eccentricity of the valve shaft, the eccentricity of the valve disc center and the eccentricity of the valve body center, so that when the valve disc rotates, three eccentric operations can be generated to achieve sealing performance. When the valve is closed, the valve disc rotates in a clockwise or counterclockwise direction, so that the sealing ring in the valve body and the valve face generate a certain pressure. At this time, the center of the valve disc and the center of the valve shaft do not coincide, resulting in an eccentric distance, which increases the friction between the valve disc and the sealing ring and improves the sealing performance; when the valve is opened, the valve disc rotates to reach the opening angle, and the sealing ring is isolated from the valve medium, thereby achieving smooth valve operation.

[0113] The above-mentioned feed valve (e.g., ball valve) 4, discharge valve (e.g., ball valve) 8, and sealing butterfly valves arranged at the purge port 2 and the gas outlet 5 belong to the basic sealing structure of the material processing furnace 1a of the utility model. In addition to these basic sealing structures, the material processing furnace 1a also requires a rotary sealing mechanism between the stirring shaft and the furnace body sealing cavity. The driving end sealing mechanism and driven end sealing mechanism described above in the utility model can be applied to the driving end head and driven end head of the material processing furnace 1a.

[0114] In the present invention, by equipping a single material processing furnace 1a, its processing capacity can generally be sufficient to cope with the amount of drill cuttings generated by a drilling rig. However, in order to meet the continuous operation of the feeding equipment and the discharging equipment and the drill cuttings processing requirements of different sites, a drilling rig can be equipped with more than two material processing furnaces 1a so that the drill cuttings on site can be processed in time. One, two or more material processing furnaces 1a can be modularly designed to facilitate on-site installation and transfer transportation.

[0115] The scope of the present technology is not limited to the illustrative embodiments shown in the drawings and described above, and also includes all embodiments that can provide effects equivalent to those of the present technology. In addition, the scope of the present technology is not limited to the combination of features of the present invention described in each claim, and can also be defined by all desired combinations of certain specific features among all the disclosed features.

Claims

1. Material handling furnace, characterized by include: A furnace sealed chamber including a barrel, a first end cover and a second end cover; A rotating shaft capable of rotating relative to the furnace body sealed cavity, wherein the first end portion and the second end portion of the rotating shaft respectively extend out of the furnace body sealed cavity through a first through hole provided in the first end cover and a second through hole provided in the second end cover, and are supported in a first bearing seat and a second bearing seat by using a first bearing and a second bearing respectively, and the first bearing seat and the second bearing seat are respectively fixed on the outer sides of the first end cover and the second end cover facing away from the furnace body sealed cavity; as well as a first sealing mechanism, which is disposed at the first end portion of the rotating shaft, Wherein, the first sealing mechanism comprises: A stuffing box is fixed in the first through hole in the first end cover and is arranged in a manner surrounding the first end of the rotating shaft. The stuffing box is located between the first bearing and the cylinder in the axial direction of the rotating shaft, and the rotating shaft is rotatably sealed in the stuffing box.

2. The material processing furnace according to claim 1, characterized in that: The first sealing mechanism further comprises: a labyrinth sealing component disposed on the first end cover, and The labyrinth seal component extends from the first end cover toward the furnace body sealing cavity in a manner concentric with the rotating shaft until the labyrinth seal provided in the inner peripheral surface of the labyrinth seal component contacts the outer peripheral surface of the rotating shaft.

3. The material processing furnace according to claim 2, characterized in that: The stuffing box includes a stuffing box fixedly connected to the first through hole in the first end cover, a space is formed between the inner peripheral surface of the stuffing box and the outer peripheral surface of the first end portion of the rotating shaft, and The space can be filled with a stuffing box so that the rotating shaft is rotatably sealed within the stuffing box.

4. The material processing furnace according to claim 3, characterized in that: The stuffing box further comprises: a pressure cover detachably arranged at the box opening of the stuffing box, and one end of the pressure cover can move in the stuffing box along the axial direction of the rotating shaft.

5. The material processing furnace according to claim 4, characterized in that: An adjusting bolt is arranged on the gland. The adjusting bolt is installed into the gland from the other end of the gland opposite to the one end in the axial direction of the rotating shaft.

6. The material processing furnace according to claim 3, characterized in that: An oil filling hole is provided through the wall of the stuffing box, An oil ring is arranged in the stuffing box at a position corresponding to the oil filling hole, and After lubricating grease is injected through the oil injection hole, an oil seal can be formed at the oil ring.

7. The material processing furnace according to claim 3, characterized in that: A sleeve is tightly mounted on the first end of the rotating shaft in a manner surrounding the first end, the stuffing box surrounds the sleeve, and The first sealing mechanism further includes: first and second sealing rings disposed between the inner circumferential surface of the sleeve and the outer circumferential surface of the first end portion of the rotating shaft, and the first and second sealing rings are disposed close to both ends of the sleeve, respectively.

8. The material processing furnace according to claim 7, characterized in that: The box bottom of the stuffing box is located on the side opposite to the box opening. At the bottom surface of the box bottom of the stuffing box facing the stuffing, a third sealing ring is arranged between the inner circumferential surface of the stuffing box and the outer circumferential surface of the shaft sleeve in a radially tight fit manner.

9. The material processing furnace according to claim 3, characterized in that: The first end portion of the rotating shaft is a first shaft head which is manufactured separately and has a diameter smaller than that of the rotating shaft. End plates with the same diameter are respectively provided at one end where the first shaft head and the rotating shaft are connected to each other, and the first shaft head and the rotating shaft are connected to each other through the end plates, and An inner peripheral surface of the labyrinth seal member is in rotational contact with an outer peripheral surface of the end plate of the first shaft head.

10. The material processing furnace according to any one of claims 1 to 9, characterized in that: The second end portion of the rotating shaft has the same structure as the first end portion, and A second sealing mechanism that is the same as the first sealing mechanism is provided at the second end portion of the rotating shaft.

11. The material processing furnace according to claim 10, characterized in that: The second end cover is replaced by an arc-shaped shell, A bearing cover is provided at a position away from the first end cover toward the outside by a predetermined distance in the axial direction of the rotating shaft so as to surround the first end portion of the rotating shaft, and The first bearing seat is fixed to the side of the bearing cover opposite to the first end cover side by fastening bolts, and the second bearing seat is fixed to the outer side of the housing by welding.

12. The material processing furnace according to claim 11, characterized in that: A spacer is provided between the bearing cover and the first end cover, and the spacer connects the bearing cover and the first end cover.

13. The material processing furnace according to claim 11, characterized in that: The first end of the rotating shaft is externally connected to a power device after extending from the first bearing seat. The outer end of the second bearing seat is detachably sealed by a cover through a flange, and A hand hole is provided on the second bearing seat, and the hand hole is detachably sealed by a hand hole flange.

14. The material processing furnace according to claim 13, characterized in that: A dust cover is provided at a position outside the first bearing in the axial direction of the rotating shaft so as to surround the first end of the rotating shaft. The first bearing is accommodated in a space defined by the dust cover, the first bearing seat, the bearing cover and the first end of the rotating shaft, and A fourth sealing ring is arranged on the inner circumferential surface of the dustproof cover, and the fourth sealing ring surrounds the first end portion of the rotating shaft in a radially tight fit manner.

15. The material processing furnace according to claim 14, characterized in that Also includes: At least one observation hole is a pipe penetrating from the wall of the sealed cavity of the furnace body, and one end of the observation hole facing outward is detachably sealed by a blind cover or a transparent observation window using a flange.

16. The material processing furnace according to claim 14, characterized in that Also includes: The gas outlet is a pipe penetrating from the upper side wall of the sealed cavity of the furnace body, and the outward end of the gas outlet is connected to the subsequent processing equipment via a sealed butterfly valve. Wherein, the subsequent processing equipment includes a fan.

17. The material processing furnace according to claim 16, characterized in that: The subsequent processing equipment also includes at least one of filtering equipment, pulse dust removal equipment, condensation separation equipment, spraying equipment, recovery equipment, and discharge equipment.

18. The material processing furnace according to claim 16, characterized in that Also includes: The discharge port is a pipe penetrating from the lower side wall of the furnace body sealed cavity, and the outward end of the discharge port is connected to the discharge device via a ball valve. Wherein, the discharging equipment cools down, processes, discharges or recycles the solid product discharged from the discharge port.

19. The material processing furnace according to claim 18, characterized in that Also includes: The feed port is a pipe penetrating from the upper side wall of the sealed cavity of the furnace body, and the outward end of the feed port is connected to a hopper for containing materials via a ball valve.

20. The material processing furnace according to claim 19, characterized in that Also includes: a purge port, which is a pipe penetrating from the wall of the sealed chamber of the furnace body, for blowing in an inert gas, and An outward end of the purge port is connected to an inert gas source via a sealing butterfly valve.

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