Dewaxing device for sintering furnace

Abstract

The utility model discloses a dewaxing device for a sintering furnace, which comprises a first-stage dewaxing device, the first-stage dewaxing device is of a double-cylinder structure, the double-cylinder structure is composed of a sleeve with a large outer part and an inner cylinder inside, a Pall ring filled with a conical surface is arranged at an air inlet of the inner cylinder, and a second-stage dewaxing device is arranged at the air inlet of the inner cylinder. And the two ends of the sleeve with the large outer part are sealed by matching single-layer flanges with sealing rings. The two ends of the first-stage dewaxing device are sealed by adopting the single flanges matched with the sealing rings, so that the problems that when the original first-stage dewaxing device adopts the double-layer flanges, the gap between the double-layer flanges can cause the shortcut of forming agent gas, the forming agent is not completely collected, a pump set is polluted, and the production cost is high are solved; the Pall ring filled with the conical surface is arranged in the inner cylinder, so that wax gas can be in full contact with a forming agent, the filtering performance of the first-stage dewaxing device is further improved, and the phenomenon of wax blockage caused by incomplete collection of the forming agent due to the fact that wax is low in melting point and rapid in solidification is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of paraffin recovery, and in particular relates to a dewaxing device used in a sintering furnace. Background Art

[0002] Product dewaxing is an essential part of the operation of the sintering furnace and plays a vital role in product sintering.

[0003] In the current operation of the sintering furnace, under the positive pressure dewaxing state, paraffin enters the primary dewaxing device in a vapor state, enters the secondary dewaxing device through the filter, and hydrogen is volatilized by burning in the ignition basin. During negative pressure dewaxing, paraffin also passes through the primary dewaxing device in a gaseous state to enter the secondary dewaxing device, passes through the filter in the connecting pipe between the secondary dewaxing tanks and then returns to the dewaxing pipeline, and is finally discharged through the valve; this will cause excess wax to enter the pump cavity, and then there will be residual wax and insufficient wax capacity in the dewaxing device, which will have a great impact on the quality of the products that need to be dewaxed in the equipment, and even affect the service life of some important parts of the sintering furnace. In addition, since the rear end cover flange of the primary dewaxing device is a double-layer flange connection, this will result in the flange surfaces of the two flanges being unable to be absolutely sealed, which will cause the molding agent gas to take a shortcut, resulting in incomplete collection of the molding agent, pollution of the pump unit, and increased production costs. Utility Model Content

[0004] The utility model provides a dewaxing device for a sintering furnace, which can effectively solve the above problems.

[0005] The utility model is achieved in this way:

[0006] A dewaxing device for a sintering furnace, comprising:

[0007] A first-stage dewaxing device, the first-stage dewaxing device is a double-tube structure, the double-tube structure is composed of an outer large sleeve and an inner cylinder, the air inlet of the inner cylinder is provided with a ball ring filled with a conical surface, and the smaller side of the ball ring filled with a conical surface faces the air inlet of the inner cylinder, and the larger side faces the air outlet of the inner cylinder, both ends of the outer large sleeve are sealed by a single-layer flange with a sealing ring, and the outer large sleeve is also provided with a wax drain valve assembly at one end close to the air outlet;

[0008] A secondary dewaxing device, the secondary dewaxing device includes a negative pressure pipeline and a positive pressure pipeline, the negative pressure pipeline and the positive pressure pipeline are connected to the primary dewaxing device in parallel and at intervals, the negative pressure pipeline is connected to the inner cylinder near the air inlet, and the bottom of the positive pressure pipeline is connected to the large external sleeve.

[0009] As a further improvement, the cone-filled ball ring has an oblique structure on the top and a flat structure on the bottom.

[0010] As a further improvement, the negative pressure pipe is filled with ball rings.

[0011] As a further improvement, a plurality of staggered downwardly inclined baffles are provided at the connection point between the negative pressure pipeline and the first-stage dewaxing device, and the plurality of baffles form a bent air guide channel.

[0012] As a further improvement, a condensation pipe is provided in the negative pressure pipe, and the condensation pipe is used to cool the wax gas in the negative pressure pipe.

[0013] As a further improvement, a partition is provided at the connection between the positive pressure pipeline and the primary dewaxing device, and the partition is used to slow down the flow speed of the wax gas and separate the wax gas into paths.

[0014] As a further improvement, an ignition wax collecting device is provided at the top end of the positive pressure pipe.

[0015] As a further improvement, the first-stage dewaxing device is placed at an angle as a whole, and a pipeline support assembly is provided at the bottom end thereof. A pressure wax drain pipe assembly is provided on one side, and the pressure wax drain pipe assembly is connected to the bottom end of the first-stage dewaxing device. The pressure wax drain pipe assembly is connected to the ignition wax collecting device through the ignition basin wax collecting device.

[0016] As a further improvement, a wax discharge pipe is provided on the side wall of the negative pressure pipe, and one end of the wax discharge pipe is connected to the wax discharge valve assembly.

[0017] The beneficial effects of the utility model are:

[0018] 1. A ball ring with a conical surface filling is arranged in the inner cylinder so that the wax gas can fully contact with the molding agent, thereby improving the filtering performance of the primary dewaxing device and avoiding the phenomenon of wax blockage caused by incomplete collection of the molding agent due to the low melting point of the wax and its rapid solidification.

[0019] 2. Positive pressure pipelines and negative pressure pipelines are set up so that the dewaxing device can achieve the effect of switching between positive and negative pressure processes, thereby improving the applicability of the dewaxing device.

[0020] 3. The connecting pipe between the positive pressure pipe and the negative pressure pipe is cancelled, and a wax discharge pipe is arranged on the negative pressure pipe, which solves the problem of residual wax in the pump chamber of the original dewaxing device.

[0021] 4. Single flanges and sealing rings are used at both ends of the first-stage dewaxing device for sealing, which avoids the problem that when the original first-stage dewaxing device uses double-layer flanges, the gap between the double-layer flanges will cause the molding agent gas to take a shortcut, resulting in incomplete collection of the molding agent, contamination of the pump unit, and increased production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model.

[0025] Reference numerals:

[0026] 1-primary dewaxing device, 101-single-layer flange, 102-sleeve, 103-inner cylinder, 1031-air outlet of inner cylinder, 1032-air inlet of inner cylinder, 2-negative pressure pipeline, 201-wax exhaust pipeline, 202-baffle, 3-positive pressure pipeline, 4-ignition wax collecting device, 5-pipeline support assembly. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0028] In the description of the present invention, the terms "upper", "lower", "above", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] Reference Figure 1-2As shown, this embodiment provides a dewaxing device for a sintering furnace, comprising:

[0030] A first-stage dewaxing device 1, the first-stage dewaxing device 1 is a double-tube structure, the double-tube structure is composed of an outer large sleeve 102 and an inner cylinder 103, the air inlet of the inner cylinder 103 is provided with a ball ring filled with a conical surface, and the smaller side of the ball ring filled with a conical surface faces the air inlet of the inner cylinder 103, and the larger side faces the air outlet of the inner cylinder 103, both ends of the outer large sleeve 102 are sealed by a single-layer flange 101 with a sealing ring, and the outer large sleeve 102 is also provided with a wax drain valve assembly at one end close to the air outlet;

[0031] The secondary dewaxing device includes a negative pressure pipe 2 and a positive pressure pipe 3. The negative pressure pipe 2 and the positive pressure pipe 3 are connected to the primary dewaxing device 1 in parallel and at intervals. The negative pressure pipe 2 is connected to the inner cylinder 103 near the air inlet, and the bottom of the positive pressure pipe 3 is connected to the large external sleeve 102.

[0032] Furthermore, the cone-filled ball ring has an oblique structure on the top and a flat structure on the bottom.

[0033] Single flanges and sealing rings are used at both ends of the first-stage dewaxing device 1 for sealing, thereby avoiding the problem that when the original first-stage dewaxing device 1 uses double-layer flanges, the gap between the double-layer flanges will cause the molding agent gas to take a shortcut, resulting in incomplete molding agent collection, pollution of the pump group, and increased production costs.

[0034] By arranging a ball ring with a conical filling in the inner cylinder 103, the air inlet area is small, and the gas can be compressed when the air flow rate remains unchanged, so that it can fully contact with the filler; the air outlet area is large, which reduces the impact on the air circulation rate and can improve the filtering performance of the dewaxing device, avoiding the phenomenon of wax blockage caused by incomplete collection of the molding agent due to the low melting point of the wax and its rapid solidification.

[0035] Furthermore, a partition is provided at the connection between the positive pressure pipeline 3 and the primary dewaxing device 1, and the partition is used to slow down the flow speed of the wax gas and separate the wax gas into different paths.

[0036] Furthermore, an ignition wax collecting device 4 is provided at the top of the positive pressure pipe 3 .

[0037] Furthermore, the first-stage dewaxing device 1 is placed at an angle as a whole, and a pipe support assembly 5 is provided at its bottom end. A pressure wax drain pipe assembly is provided on one side. The pressure wax drain pipe assembly is connected to the bottom end of the first-stage dewaxing device 1, and the pressure wax drain pipe assembly is connected to the ignition wax collecting device 4 through the ignition basin wax collecting device.

[0038] Furthermore, the negative pressure pipe 2 is filled with ball rings.

[0039] Furthermore, a plurality of staggered downwardly inclined baffles 202 are provided at the connection point between the negative pressure pipe 2 and the primary dewaxing device 1, and the plurality of baffles 202 form a bent air guide channel.

[0040] Furthermore, a condensation pipe is provided in the negative pressure pipe 2 , and the condensation pipe is used to cool the wax gas in the negative pressure pipe 2 .

[0041] Furthermore, a wax discharge pipe 201 is provided on the side wall of the negative pressure pipe 2 , and one end of the wax discharge pipe 201 is connected to the wax discharge valve assembly.

[0042] By setting up a positive pressure pipeline 3 and a negative pressure pipeline 2, the dewaxing device can achieve the effect of switching between positive and negative pressure processes, thereby improving the applicability of the dewaxing device, and by filling a ball ring in the negative pressure pipeline 2 and cooperating with the wax discharge pipeline 201, the liquid wax in the negative pressure pipeline 2 can be directly discharged through the wax discharge valve assembly.

[0043] By eliminating the connecting pipe between the positive pressure pipe 3 and the negative pressure pipe 2 and providing a wax discharge pipe 201 on the negative pressure pipe 2, the problem of residual wax in the pump chamber of the original dewaxing device is solved.

[0044] The working principle of this utility model:

[0045] In the dewaxing and wax discharge process of the sintering furnace, when positive pressure dewaxing is used, paraffin enters the inner cylinder 103 from the primary dewaxing device 1 through the ball ring filled with a cone surface in a gaseous manner, and then enters the secondary dewaxing device through the filtering effect of the ball ring filled with a cone surface. The lower end partition of the secondary dewaxing device will slow down the flow rate of the gas and divide the gas into two paths. One path climbs up along the positive pressure pipeline 3 and burns part of the hydrogen through the ignition wax collection device 4 and collects the paraffin. The other path enters the negative pressure pipeline 2. The condensation device of the negative pressure pipeline 2 makes the gas cool and transform from gaseous to liquid. Finally, according to the pumping force of the pump, the wax is discharged from the wax discharge pipeline 201 and the wax discharge valve assembly. When negative pressure dewaxing is used, paraffin enters the inner cylinder 103 from the primary dewaxing device 1 through the ball ring filled with a cone surface in a gaseous manner, and then enters the negative pressure pipeline 2 through the filtering effect of the ball ring filled with a cone surface. Because the ball ring is provided in the negative pressure pipeline 2 for filtering, and the condensation device is used to directly discharge the liquid wax from the wax discharge valve assembly.

[0046] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A dewaxing device for a sintering furnace, characterized in that: include: A first-stage dewaxing device, the first-stage dewaxing device is a double-tube structure, the double-tube structure is composed of an outer large sleeve and an inner cylinder, the air inlet of the inner cylinder is provided with a ball ring filled with a conical surface, and the smaller side of the ball ring filled with a conical surface faces the air inlet of the inner cylinder, and the larger side faces the air outlet of the inner cylinder, both ends of the outer large sleeve are sealed by a single-layer flange with a sealing ring, and the outer large sleeve is also provided with a wax drain valve assembly at one end close to the air outlet; A secondary dewaxing device, the secondary dewaxing device includes a negative pressure pipeline and a positive pressure pipeline, the negative pressure pipeline and the positive pressure pipeline are connected to the primary dewaxing device in parallel and at intervals, the negative pressure pipeline is connected to the inner cylinder near the air inlet, and the bottom of the positive pressure pipeline is connected to the large external sleeve.

2. The dewaxing device for a sintering furnace according to claim 1, characterized in that: The cone-filled ball ring has an oblique structure on the top and a flat structure on the bottom.

3. The dewaxing device for a sintering furnace according to claim 1, characterized in that: The negative pressure pipe is filled with ball rings.

4. The dewaxing device for a sintering furnace according to claim 3, characterized in that: A plurality of staggered downwardly inclined baffles are provided at the connection point between the negative pressure pipeline and the first-stage dewaxing device, and the plurality of baffles form a bent air guide channel.

5. The dewaxing device for a sintering furnace according to claim 3, characterized in that: A condensation pipe is arranged in the negative pressure pipe, and the condensation pipe is used to cool the wax gas in the negative pressure pipe.

6. The dewaxing device for a sintering furnace according to claim 1, characterized in that: A partition is provided at the connection between the positive pressure pipeline and the primary dewaxing device, and the partition is used to slow down the flow speed of the wax gas and separate the wax gas into different paths.

7. The dewaxing device for a sintering furnace according to claim 1, characterized in that: An ignition and wax collecting device is arranged at the top end of the positive pressure pipe.

8. The dewaxing device for a sintering furnace according to claim 7, characterized in that: The first-stage dewaxing device is placed at an angle as a whole, and a pipeline support assembly is arranged at its bottom end. A pressure wax drain pipe assembly is arranged on one side. The pressure wax drain pipe assembly is connected to the bottom end of the first-stage dewaxing device, and the pressure wax drain pipe assembly is connected to the ignition wax collecting device through the ignition basin wax collecting device.

9. The dewaxing device for a sintering furnace according to claim 1, characterized in that: A wax discharge pipeline is arranged on the side wall of the negative pressure pipeline, and one end of the wax discharge pipeline is communicated with the wax discharge valve assembly.

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