CN221099321U - Dewaxing system of sintering furnace - Google Patents

Abstract

The utility model discloses a dewaxing system of a sintering furnace, which belongs to the technical field of paraffin recovery and comprises a dewaxing tank and a wax storage tank which are arranged up and down, wherein a heat exchange assembly for cooling wax gas to liquid wax is arranged in the dewaxing tank, a communicating vertical pipe for feeding the wax gas into and discharging the liquid wax is arranged at the bottom of the dewaxing tank, an exhaust vertical pipe for connecting a vacuum pump and/or an ignition device is arranged at the top of the dewaxing tank, a filtering mechanism is arranged in the exhaust vertical pipe, a communicating port communicated with the communicating vertical pipe is arranged at the top of the wax storage tank, a wax removing port is arranged at the bottom of the wax storage tank, an air inlet communicated with the sintering furnace is arranged on the side wall of the wax storage tank, the air inlet is positioned between the communicating port and the wax removing port, and constant-temperature water jackets for keeping the liquid wax in a liquid state are sleeved outside the dewaxing tank and the wax storage tank. The dewaxing position and the wax storage position are mutually separated, dewaxing is carried out by the dewaxing tank, wax storage is carried out by the wax storage tank, the problem that the heat exchange is influenced by the wax liquid submerged heat exchange assembly cannot occur, the wax gas collection rate is ensured, and pollution caused by the outward discharge of the wax gas is avoided.

Description

Dewaxing system of sintering furnace

Technical Field

The utility model relates to the technical field of paraffin recovery, in particular to a dewaxing system of a sintering furnace.

Background

Along with the temperature rise of the sintering furnace, the forming agent in the product in the sintering furnace can gasify along with the temperature rise to form wax gas, and the wax gas can corrode and damage other parts in the sintering furnace. At present, the suction of the wax gas mainly comprises two processes, namely a hydrogen micro-positive pressure dewaxing process, wherein a certain amount of hydrogen is filled into a sintering furnace, then the hydrogen is ignited at the tail end of a dewaxing system, and the hydrogen in the furnace flows through the pressure difference generated by the combustion of the hydrogen, so that the wax gas in the furnace is carried out and enters the dewaxing system through a lower wax pipeline; the other is a negative pressure dewaxing process, wherein a vacuum pump is added at the tail end of a dewaxing system, a certain amount of inert gas is injected into a furnace, and the inert gas is directly pumped out by the vacuum pump.

Because the dewaxing system is a component for sucking and collecting the wax gas in the sintering furnace, the sucking rate and the collecting rate of the wax gas are two very important indexes in the dewaxing system. The collection of the wax gas mainly depends on the heat exchange device in the dewaxing system to cool and liquefy the flowing wax gas, so how the heat exchange effect directly affects the collection rate of the wax gas, if the wax gas cannot be completely collected, the wax gas can be directly discharged into the atmosphere to cause environmental pollution for the hydrogen micro positive pressure dewaxing process, and the wax gas enters the vacuum pump to pollute the pump cavity and pump oil of the vacuum pump to cause frequent cleaning and replacement of the pump oil of the vacuum pump pre-filter and the pump cavity. In order to improve the heat exchange effect, the conventional dewaxing system is generally provided with two-stage dewaxing devices, as shown in fig. 11, which is a dewaxing system having two dewaxing processes of positive pressure and negative pressure, and different dewaxing paths can be selected according to the process requirements, but the dewaxing system has a great problem when collecting wax gas: the installation position of the first-stage dewaxing heat exchanger is also the wax storage position of the whole dewaxing system, after the dewaxing system runs for a period of time, the liquid wax stored in the dewaxing system can gradually rise to submerge the first-stage heat exchanger, the heat exchange efficiency of the first-stage dewaxing heat exchanger is directly influenced, the heat exchange efficiency of the first-stage dewaxing heat exchanger can be continuously reduced along with the progress of the dewaxing process, the dewaxing effect cannot be ensured, and especially on the dewaxing path of the hydrogen micro-positive pressure dewaxing process, only the first-stage heat exchanger participates in dewaxing, and once the first-stage heat exchanger is submerged by wax liquid, the problem that complete dewaxing cannot occur can occur.

Disclosure of utility model

The utility model aims to solve the technical problems and provide a dewaxing system of a sintering furnace, which is characterized in that dewaxing is carried out by a dewaxing tank, wax is stored by a wax storage tank, the dewaxing position and the wax storage position are mutually separated, the problem that the heat exchange efficiency is influenced by a wax liquid submerged heat exchange assembly is avoided, the wax gas collection rate is ensured, and the pollution caused by the outward discharge of the wax gas is avoided.

In order to achieve the above object, the present utility model provides the following solutions: the utility model discloses a dewaxing system of a sintering furnace, which comprises a dewaxing tank and a wax storage tank which are arranged up and down, wherein a heat exchange assembly for cooling wax gas to liquid wax is arranged in the dewaxing tank, a communication vertical pipe for feeding the wax gas into the dewaxing tank and discharging the liquid wax is arranged at the bottom of the dewaxing tank, an exhaust vertical pipe for connecting a vacuum pump and/or an ignition device is arranged at the top of the dewaxing tank, a filtering mechanism is arranged in the exhaust vertical pipe, a communication port communicated with the communication vertical pipe is arranged at the top of the wax storage tank, a wax discharge port is arranged at the bottom of the wax storage tank, an air inlet for communicating with the sintering furnace is arranged at the side wall of the wax storage tank, the air inlet is positioned between the communication port and the wax discharge port, and a constant-temperature water jacket for keeping the liquid wax in a liquid state is sleeved outside the dewaxing tank and the wax storage tank.

Preferably, a first-stage heat exchange chamber and a second-stage heat exchange chamber are sequentially arranged in the dewaxing tank from outside to inside, the communication standpipe is communicated with the bottom of the first-stage heat exchange chamber, the top of the first-stage heat exchange chamber is communicated with the top of the second-stage heat exchange chamber, the bottom of the second-stage heat exchange chamber is provided with a wax outlet, one end of the exhaust standpipe extends into the bottom of the second-stage heat exchange chamber, and the other end of the exhaust standpipe extends out from the top of the second-stage heat exchange chamber; the heat exchange assembly comprises a primary heat exchanger and a secondary heat exchanger, wherein the primary heat exchanger is positioned in the primary heat exchange cavity, and the secondary heat exchanger is positioned in the secondary heat exchange cavity.

Preferably, the primary heat exchanger is a tube fin heat exchanger.

Preferably, the secondary heat exchanger is a spiral fin heat exchanger.

Preferably, the first paraffin removal device is communicated with the paraffin removal port, the second paraffin removal device is connected with the paraffin removal port, the first paraffin removal device and the second paraffin removal device respectively comprise a paraffin removal pipe with a constant temperature water jacket, and a ball valve is arranged at the paraffin outlet end of the paraffin removal pipe.

Preferably, the wax outlet end of the wax removing pipe of the first wax removing device is higher than the communication port.

Preferably, the filter mechanism comprises a filter material, a screw and a filter screen in threaded connection with two ends of the screw, the screw and the exhaust vertical pipe are coaxially arranged, the filter screens at two ends of the screw are clamped at two ends of the exhaust vertical pipe, and the filter material is filled between the two filter screens.

Preferably, the exhaust standpipe is connected with the vacuum pump and the ignition device simultaneously through a tee joint.

Preferably, an adjusting control mechanism with a ball valve is arranged between the exhaust vertical pipe and the ignition device, and a ball valve is arranged between the vacuum pump and the exhaust vertical pipe.

Preferably, the tee is a reducing tee.

Compared with the prior art, the utility model has the following technical effects:

1. In the sintering furnace dewaxing system, the original dewaxing integrated cavity is divided into the dewaxing tank and the wax storage tank which are independent, the dewaxing position and the wax storage position are mutually separated, the dewaxing tank is mainly responsible for dewaxing, the wax storage tank is mainly responsible for receiving liquid wax flowing back from the dewaxing tank, the liquid wax in the wax storage tank is stored and cannot submerge a heat exchange assembly in the dewaxing tank, so that the influence of wax liquid on the heat exchange efficiency of the heat exchange assembly can be avoided, the wax gas collection rate is ensured, the pollution caused by the discharge of the wax gas is avoided, meanwhile, the liquid wax in mixed gas is reserved by the filtering mechanism, the liquid wax is prevented from being carried out of the dewaxing system by the gas, the filtering effect is achieved, and the whole sintering furnace dewaxing system is in a vertical structure.

2. In the dewaxing system of the sintering furnace, the dewaxing tank is divided into two stages of heat exchange chambers, the total heat exchange components are divided into two stages of heat exchangers, after the wax gas enters the wax storage tank, the wax gas is subjected to primary heat exchange cooling under the action of the constant-temperature water jacket, then enters the first stage heat exchange chamber of the dewaxing tank, is subjected to primary heat exchange cooling under the action of the first stage heat exchanger, then enters the second stage heat exchange chamber, and is subjected to secondary heat exchange cooling under the action of the second stage heat exchanger, the wax gas is separated out through triple heat exchange cooling, so that the dewaxing can be thoroughly performed, and the wax gas is ensured to be completely collected.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the internal structure of a dewaxing system in elevation;

FIG. 2 is a schematic diagram of the internal structure of a dewaxing system from a side view;

FIG. 3 is a schematic perspective view of a wax storage tank;

FIG. 4 is a schematic diagram of the structure of a dewaxing tank;

FIG. 5 is a schematic view of the internal structure of the dewaxing tank;

FIG. 6 is a schematic perspective view of a heat exchange assembly;

FIG. 7 is a schematic perspective view of a primary heat exchanger;

FIG. 8 is a schematic perspective view of a secondary heat exchanger;

FIG. 9 is a schematic perspective view of a filter mechanism;

FIG. 10 is a schematic view showing the internal structure of the first wax removing device;

fig. 11 is a schematic diagram of the internal structure of a conventional dewaxing system.

Reference numerals illustrate:

1. A dewaxing tank; 2. a wax storage tank; 3. constant temperature water jacket; 4. a primary heat exchanger; 5. a secondary heat exchanger; 6. a filtering mechanism; 7. a first de-waxing device; 8. a second de-waxing device; 9. an adjustment control mechanism; 10. reducing tee joint; 11. a vacuum pump line; 12. an ignition device;

101. A communicating vertical pipe; 102. an exhaust stack; 103. a primary heat exchange chamber; 104. a secondary heat exchange chamber; 105. an assembly end flange; 106. a wax storage end flange; 107. a three-way end flange;

201. a communication port; 202. an air inlet; 203. dewaxing end flanges; 204. a ground margin mounting plate;

301. A water jacket inlet pipe; 302. a water jacket water outlet pipe;

401. A heat exchange assembly cover plate; 402. a heat exchange water inlet pipe; 403. conical fins;

501. A helical fin; 502. a heat exchange sleeve; 503. a heat exchange water outlet pipe;

601. a screw; 602. a filter screen;

701. a first de-waxing pipe; 702. a first ball valve;

801. a second de-waxing pipe; 802. and a second ball valve.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment provides a dewaxing system of a sintering furnace, which comprises a dewaxing tank 1 and a wax storage tank 2, as shown in fig. 1 to 11, wherein the dewaxing tank 1 and the wax storage tank 2 are arranged up and down. The dewaxing tank 1 is internally provided with a heat exchange assembly, the bottom of the dewaxing tank 1 is provided with a communication vertical pipe 101, the top of the dewaxing tank 1 is provided with an exhaust vertical pipe 102, the exhaust vertical pipe 102 is used for being connected with a vacuum pump and/or an ignition device 12, and a filtering mechanism 6 is arranged in the exhaust vertical pipe 102. The top of the wax storage tank 2 is provided with a communication port 201, the communication port 201 is communicated with the communication vertical pipe 101, the bottom of the wax storage tank 2 is provided with a wax discharge port, the side wall of the wax storage tank 2 is provided with an air inlet 202, the air inlet 202 is communicated with the sintering furnace, and the air inlet 202 is positioned between the communication port 201 and the wax discharge port. The dewaxing tank 1 and the wax storage tank 2 are respectively sleeved with a constant temperature water jacket 3. The vacuum pump and the ignition device 12 can be arranged at one time to realize one of a negative pressure dewaxing process and a hydrogen micro-positive pressure dewaxing process, or the vacuum pump and the ignition device 12 can be arranged at the same time, and then the negative pressure dewaxing process or the hydrogen micro-positive pressure dewaxing process is selected according to the actual working condition.

Working principle:

Hot water (usually hot water at about 70 ℃) with preset temperature is continuously introduced into the constant temperature water jacket 3 outside the dewaxing tank 1 and the wax storage tank 2, mixed gas in the sintering furnace enters the wax storage tank 2 through the air inlet 202, part of the wax gas is cooled and liquefied under the heat exchange of the constant temperature water jacket 3 and remains in the wax storage tank 2, the rest of the wax gas enters the communication vertical pipe 101 through the communication port 201 at the top of the wax gas and the mixed gas, then enters the dewaxing tank 1 through the communication vertical pipe 101, the gas exchanges heat with the heat exchange assembly, so that the rest of the wax gas in the gas is completely cooled to liquid wax, the liquid wax drops to the bottom of the dewaxing tank 1 under the action of gravity, then flows into the wax storage tank 2 through the communication vertical pipe 101 and the communication port 201, and other gases in the gas enter the exhaust vertical pipe 102, the liquid wax carried in the mixed gas can be effectively intercepted by the filtering mechanism 6 to remain in the dewaxing system by entering the vacuum pump or the ignition device 12 after being filtered by the filtering mechanism 6, the liquid wax dropped by the communication port 201 is collected in the wax storage tank 2, when the sintering furnace finishes one-time sintering or the liquid wax in the wax storage tank 2 reaches a preset liquid level (usually not exceeding the air inlet 202), the wax discharge port (which is closed before) is opened to discharge the liquid wax in the wax storage tank 2, and the continuously-introduced hot water in the constant-temperature water jackets 3 outside the dewaxing tank 1 and the wax storage tank 2 can keep the liquid state of the cooled liquid wax in the dewaxing tank 1 and the wax storage tank 2 in the above process, and the cooled liquid wax can not be further cooled and solidified into solid wax so as to be discharged in the later period. This dewaxing system has divided into two independent parts of wax storage jar 2 and dewaxing jar 1, and liquid wax can not cross the heat transfer assembly in dewaxing jar 1, can not influence heat transfer efficiency then, has guaranteed wax gas collection effect.

In order to ensure the heat exchanging effect, in this embodiment, as shown in fig. 1 to 11, the interior of the dewaxing tank 1 is divided into two heat exchanging spaces: the primary heat exchange chamber 103 and the secondary heat exchange chamber 104 are sequentially arranged from outside to inside, namely the primary heat exchange chamber 103 is annularly wrapped around the secondary heat exchange chamber 104. The communication standpipe 101 is communicated with the bottom of the primary heat exchange chamber 103, and the top of the primary heat exchange chamber 103 is communicated with the top of the secondary heat exchange chamber 104. The bottom of the secondary heat exchange chamber 104 is provided with a wax outlet, one end of the exhaust standpipe 102 extends into the bottom of the secondary heat exchange chamber 104, and the other end of the exhaust standpipe 102 extends out of the top of the secondary heat exchange chamber 104. The heat exchange assembly comprises a primary heat exchanger 4 and a secondary heat exchanger 5, wherein the primary heat exchanger 4 is positioned in a primary heat exchange chamber 103, and the secondary heat exchanger 5 is positioned in a secondary heat exchange chamber 104. The above is only a two-stage heat exchange implementation mode, in practice, if more wax gas exists, three-stage heat exchange modes, even more than three-stage heat exchange modes, namely, a three-stage heat exchange chamber and more than three-stage heat exchange chambers are additionally arranged, and a three-stage heat exchanger and more than three-stage heat exchangers are additionally arranged.

The working process comprises the following steps:

The gas in the wax storage tank 2 firstly enters the first-stage heat exchange chamber 103 from the communication vertical pipe 101 and then flows upwards, the first-stage heat exchange is carried out by the first-stage heat exchanger 4 in the flowing process, most of the wax gas in the gas is liquefied to form liquid wax, then flows back into the first-stage heat exchange chamber 103 from the communication vertical pipe 101, the rest of the wax gas flows into the second-stage heat exchange chamber 104 along with the gas from the top of the first-stage heat exchange chamber 103, then flows downwards along the second-stage heat exchange chamber 104, the second-stage heat exchange is carried out by the second-stage heat exchanger 5 in the flowing process, all the rest of the wax gas in the gas is cooled to form liquid wax, the dewaxed gas is discharged through the exhaust vertical pipe 102 or is discharged into a vacuum pump or is discharged into the ignition device 12, but no matter which is discharged, the gas is subjected to twice heat exchange, the heat exchange is sufficient, the residual wax gas can be effectively avoided, and when the sintering furnace completes primary sintering or the liquid wax in the second-stage heat exchange chamber 104 reaches a preset liquid level (normally does not exceed the second-stage heat exchanger 5), and is discharged from a wax outlet at the bottom of the second-stage heat exchange chamber 104 (before being closed).

Further, in this embodiment, as shown in fig. 1 to 11, the primary heat exchanger 4 is a tube-type fin heat exchanger, and the tube-type fin heat exchanger mainly includes a heat exchange water inlet tube 402, and then a plurality of tapered fins 403 are sequentially arranged on a vertical tube section of the heat exchange water inlet tube 402 at intervals from bottom to top so as to match with a gas rising path, increase a heat exchange area, and improve a heat exchange effect.

Further, in this embodiment, as shown in fig. 1 to 11, the secondary heat exchanger 5 is a spiral fin heat exchanger, and the spiral fin heat exchanger mainly includes a heat exchange sleeve 502, the heat exchange sleeve 502 is sleeved on the exhaust standpipe 102, the heat exchange sleeve 502 is externally communicated with a spiral fin 501, one side of the heat exchange sleeve 502 is communicated with the heat exchange water inlet pipe 402 of the primary heat exchanger 4, and a heat exchange water outlet pipe 503 is arranged on the other side of the heat exchange sleeve 502. Hot water enters from the heat exchange water inlet pipe 402, sequentially passes through all the conical fins 403 from bottom to top, enters into the heat exchange sleeve 502, flows into the lower part from the upper part of the spiral fins 501, and is discharged from the heat exchange water outlet pipe 503.

In this embodiment, as shown in fig. 1 to 11, the dewaxing tank 1 is mainly composed of stainless steel pipes, the top and bottom of the stainless steel pipes are not sealed, the constant temperature water jacket 3 is sleeved outside the stainless steel pipes, stainless steel sealing plates are welded at the bottoms of the stainless steel pipes and the constant temperature water jacket 3 for sealing, an assembly end flange 105 is arranged at the top opening of the stainless steel pipes, and a wax storage end flange 106 is arranged at the bottom. The wax storage tank 2 is mainly composed of stainless steel pipes, the top and the bottom of the stainless steel pipes are unsealed, a constant-temperature water jacket 3 is sleeved outside the stainless steel pipes, stainless steel sealing plates are welded at the bottoms of the stainless steel pipes and the constant-temperature water jacket 3 for sealing, a dewaxing end flange 203 is arranged at the top opening of the stainless steel pipes, and a foundation mounting plate 204 is arranged at the stainless steel sealing plates at the bottom of the wax storage tank 2. Dewaxing jar 1 and wax storage jar 2 pass through wax storage end flange 106, dewaxing end flange 203 bolted connection, and bolted connection has heat transfer assembly apron 401 on the assembly end flange 105, has offered many heat transfer tube hole that supply heat transfer inlet tube 402 and heat transfer outlet pipe 503 to wear out on the heat transfer assembly apron 401, and heat transfer inlet tube 402 and heat transfer outlet pipe 503 weld on the heat transfer tube hole.

In this embodiment, as shown in fig. 1 to 11, the first wax removing device 7 is connected to the wax removing port, and the second wax removing device 8 is connected to the wax outlet. The first paraffin removal device 7 comprises a first paraffin removal pipe 701, the constant temperature water jacket 3 is wrapped outside the first paraffin removal pipe 701 to prevent liquid paraffin from solidifying, and a first ball valve 702 is arranged at the paraffin outlet end of the first paraffin removal pipe 701. The second wax removing device 8 comprises a second wax removing pipe 801, the constant temperature water jacket 3 is wrapped outside the second wax removing pipe 801 to prevent liquid wax from solidifying, and a second ball valve 802 is arranged at the wax outlet end of the second wax removing pipe 801.

Working principle:

when the paraffin removal is performed, the exhaust standpipe 102 is required to be closed, then nitrogen is filled into the paraffin storage tank 2 and the dewaxing tank 1 through the air inlet 202, the air pressure in the paraffin storage tank 2 and the dewaxing tank 1 is continuously increased along with continuous filling of the nitrogen, at the moment, the first ball valve 702 and the second ball valve 802 are opened, the high pressure in the dewaxing system can extrude the liquid paraffin reserved in the paraffin storage tank 2 and the dewaxing tank 1 through the first paraffin removal pipe 701 and the second paraffin removal pipe 801 respectively, and when the liquid paraffin is discharged, the first ball valve 702 and the second ball valve 802 are closed.

In this embodiment, as shown in fig. 1 to 11, the wax outlet end of the first wax removing pipe 701 is not lower than the communication port 201, and preferably both are flush. The wax outlet end of the second de-waxing tube 801 is substantially flush with the wax outlet end of the first de-waxing tube 701. The second wax removing pipe 801 and the first wax removing pipe 701 can be connected with a wax liquid recovery device to recover the wax liquid.

In the present embodiment, as shown in fig. 1 to 11, the filter mechanism 6 includes a filter material, a screw 601, and a filter screen 602. The two filter screens 602 are respectively in threaded connection with two ends of the screw 601, and the filter screens 602 at the two ends of the screw 601 are clamped at two ends of the exhaust vertical pipe 102, so that the screw 601 is coaxially suspended in the exhaust vertical pipe 102, and the filter material is filled between the two filter screens 602. Preferably, a nut is added on the outer side of the filter screen 602 to ensure the connection stability. Preferably, the filter material may be a pall ring, which is a small ring formed by rolling metal sheets, and has two rows of windows with tongues on the ring wall, each window has 5 tongues, and the filtering is to filter wax gas in the mixed gas, the boiling point of the wax gas is 250-350 ℃, and the gaseous wax can be liquefied into liquid wax and remain in the dewaxing system by reducing the temperature of the mixed gas and increasing the contact surface of the mixed gas and pall ring, so as to achieve the filtering effect.

In this embodiment, as shown in fig. 1-11, the exhaust stack 102 is connected to both the vacuum pump and the ignition device 12 via a tee joint. Specifically, a tee joint end flange 107 can be arranged at the exhaust end of the exhaust standpipe 102, and the tee joint is provided with an exhaust end flange, and the tee joint and the exhaust standpipe 102 can be fixedly connected through the tee joint end flange 107 and the exhaust end flange in a bolt connection manner, so that the dewaxing system has two dewaxing processes.

In this embodiment, as shown in fig. 1 to 11, an adjusting control mechanism 9 is disposed between the exhaust standpipe 102 and the ignition device 12, the adjusting control mechanism 9 is provided with a third ball valve, a fourth ball valve is disposed between the vacuum pump and the exhaust standpipe 102, one end of the specific tee is connected with the exhaust standpipe 102, the other end is connected with the adjusting control mechanism 9, and the third end is connected with the vacuum pump through a vacuum pump pipeline 11.

Working principle:

① When the hydrogen micro-positive pressure dewaxing process is carried out: the ball valve of the adjusting and controlling mechanism 9 is in an open state, the ball valve connected to the vacuum pump is in a closed state, at the moment, hydrogen can float upwards to enter the ignition device 12 for combustion, and the pressure difference generated by the combustion of the hydrogen enables the hydrogen in the sintering furnace to flow, so that the wax gas in the furnace is continuously brought into the wax storage tank 2, and then the subsequent dewaxing process is carried out.

② When the negative pressure dewaxing process is carried out: the ball valve of the adjusting and controlling mechanism 9 is in a closed state, the ball valve connected to the vacuum pump is in an open state, a certain amount of inert gas is filled into the sintering furnace, the filled inert gas is pumped into the wax storage tank 2 by the vacuum pump together with the mixed gas such as the wax, and then the subsequent dewaxing process is carried out.

In this embodiment, as shown in fig. 1 to 11, the tee is a reducing tee 10, and the reducing section of the reducing tee 10 is mainly the end connected to the exhaust standpipe 102.

In this embodiment, as shown in fig. 1 to 11, the water jacket water inlet pipe 301 of the constant temperature water jacket 3 sleeved outside the wax storage tank 2 and the dewaxing tank 1 is lower than the water jacket water outlet pipe 302. Namely, the water jacket water inlet pipe 301 of the wax storage tank 2 is positioned at the bottom of the wax storage tank, the water jacket water outlet pipe 302 is positioned at the top of the wax storage tank, and the water jacket water inlet pipe and the water jacket water outlet pipe are respectively arranged at two sides of the wax storage tank 2. Also, the water jacket inlet pipe 301 of the dewaxing tank 1 is positioned at the bottom of the dewaxing tank, the water jacket outlet pipe 302 is positioned at the top of the dewaxing tank, and the water jacket inlet pipe and the water jacket outlet pipe are respectively arranged at two sides of the dewaxing tank 1.

In this embodiment, as shown in fig. 1 to 11, the dewaxing system has a vertical structure as a whole, and compared with the conventional horizontal dewaxing system, the dewaxing system has a more compact structure and a smaller occupied area, is beneficial to optimizing the layout of the sintering furnace, and is more attractive in appearance.

The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims (10)

1. The utility model provides a fritting furnace dewaxing system, its characterized in that, including dewaxing jar and the wax storage jar of arranging from top to bottom, be equipped with in the dewaxing jar and be used for cooling wax gas to the heat transfer assembly of liquid wax, the bottom of dewaxing jar is equipped with the intercommunication standpipe that supplies wax gas to get into and liquid wax flows, the top of dewaxing jar is equipped with the exhaust standpipe that is used for connecting vacuum pump and/or ignition, be equipped with filtering mechanism in the exhaust standpipe, the top of wax storage jar be equipped with the intercommunication mouth of intercommunication standpipe intercommunication, the bottom of wax storage jar is equipped with the paraffin removal mouth, the lateral wall of wax storage jar is equipped with the air inlet that is used for with the fritting furnace intercommunication, the air inlet is located the intercommunication mouth with between the paraffin removal mouth, dewaxing jar with all overlap outside the wax storage jar and be equipped with the constant temperature water jacket that is used for liquid wax to keep liquid state.

2. The dewaxing system of a sintering furnace according to claim 1, wherein a primary heat exchange chamber and a secondary heat exchange chamber are sequentially arranged in the dewaxing tank from outside to inside, the communication vertical pipe is communicated with the bottom of the primary heat exchange chamber, the top of the primary heat exchange chamber is communicated with the top of the secondary heat exchange chamber, a wax outlet is formed in the bottom of the secondary heat exchange chamber, one end of the exhaust vertical pipe extends into the bottom of the secondary heat exchange chamber, and the other end of the exhaust vertical pipe extends out of the top of the secondary heat exchange chamber; the heat exchange assembly comprises a primary heat exchanger and a secondary heat exchanger, wherein the primary heat exchanger is positioned in the primary heat exchange cavity, and the secondary heat exchanger is positioned in the secondary heat exchange cavity.

3. A fritting furnace dewaxing system according to claim 2, wherein said primary heat exchanger is a tube fin heat exchanger.

4. A sintering furnace dewaxing system according to claim 3 wherein said secondary heat exchanger is a spiral fin heat exchanger.

5. The sintering furnace dewaxing system according to claim 2, wherein the wax removing port is communicated with a first wax removing device, the wax outlet is connected with a second wax removing device, the first wax removing device and the second wax removing device comprise a wax removing pipe with a constant temperature water jacket, and a ball valve is arranged at the wax outlet end of the wax removing pipe.

6. The sintering furnace dewaxing system of claim 5, wherein the wax outlet end of the wax discharge tube of the first wax discharge device is higher than the communication port.

7. The fritting furnace dewaxing system of claim 1, wherein the filter mechanism comprises a filter material, a screw and a filter screen screwed to both ends of the screw, the screw is coaxially disposed with the vent stack, the filter screens at both ends of the screw are clamped at both ends of the vent stack, and the filter material is filled between the two filter screens.

8. A sintering furnace dewaxing system according to claim 1 wherein said exhaust standpipe is connected to both said vacuum pump and said ignition means by means of a tee joint.

9. The sintering furnace dewaxing system according to claim 8, wherein an adjusting control mechanism with a ball valve is arranged between the exhaust standpipe and the ignition device, and a ball valve is arranged between the vacuum pump and the exhaust standpipe.

10. A fritting furnace dewaxing system according to claim 9, wherein said tee is a reducing tee.