阅读说明：本技术 喷丝板高温水解真空氧化炉 (spinneret plate high-temperature hydrolysis vacuum oxidation furnace ) 是由 杨俊� 杨荣超 于 2019-10-08 设计创作，主要内容包括：本发明为一种喷丝板高温水解真空氧化炉,炉膛(4)外壁铺设陶瓷加热带(7),炉膛(4)内蒸汽管道(8)采用简易喷射孔式设计,炉门(1)由气缸(30)自动锁紧。在外源蒸汽进入蒸汽加热器(14)前增设汽水分离器(24),降低喷丝板氧化生锈的可能性,在蒸汽回收处理装置中增设冷凝器(27),并串联于蒸汽喷淋洗涤塔(26)的前序,回收蒸汽先降温后处理,提高了后处理装置的工艺安全性；工件支架(2)栅格式优化设计,喷丝板立式置放,充分利用炉膛空间,提高工作效率。整机结构紧凑,工艺设计进一步优化,自动化程度高。(The invention relates to a spinneret plate high-temperature hydrolysis vacuum oxidation furnace, wherein a ceramic heating belt (7) is paved on the outer wall of a hearth (4), a steam pipeline (8) in the hearth (4) adopts a simple jet hole type design, and a furnace door (1) is automatically locked by an air cylinder (30). A steam-water separator (24) is additionally arranged before external steam enters a steam heater (14), so that the possibility of oxidation and rust of a spinneret plate is reduced, a condenser (27) is additionally arranged in a steam recovery processing device and is connected in series with the preorder of a steam spray washing tower (26), the recovered steam is firstly cooled and then processed, and the process safety of the post-processing device is improved; the workpiece support (2) is optimally designed in a grid mode, a spinneret plate is vertically placed, the space of a hearth is fully utilized, and the working efficiency is improved. The whole machine has compact structure, further optimized process design and high automation degree.)

1. The spinneret plate high-temperature hydrolysis vacuum oxidation furnace comprises a furnace body (5), a furnace door (1) and a steam fog post-treatment device (10), wherein an electric heating element (7) is paved on the furnace body (5), a waste collecting tank (12) is arranged on the lower side of the furnace body (5), and the furnace door (1) and the steam fog post-treatment device (10) are respectively arranged at the left end and the right end of the furnace body (5); a steam pipeline (8) loop with a plurality of steam injection holes and a workpiece track (13) for supporting the workpiece support (2) to run are laid in the hearth (4), the furnace door (1) is driven to open and close by a motor (16) through a gear (15) and a rack (18), and the workpiece support (2) for placing the workpiece is arranged on the inner side of the furnace door (1) and is opened and closed together with the furnace door (1); a steam heater (14) which can carry out secondary heating on the heat source steam is arranged on the outer side of the furnace body (5); the steam fog post-treatment device (10) comprises a steam recovery treatment device and a waste gas treatment device generated by overheating combustion during electric heating; the method is characterized in that: the steam recovery processing device consists of a condenser (27), a steam spray washing tower (26) and a wastewater collection tank (27), the waste gas processing device consists of a spray tank (22), a vacuum pump (23) and a water storage tank (28), the waste gas processing device and the steam recovery processing device share one wastewater collection tank (27), and wastewater in the spray tank (22) is directly discharged into the wastewater collection tank (27); the waste gas treatment device and the steam recovery treatment device are respectively communicated with the hearth (4) through a steam outlet (9) and a waste gas outlet (11) to form an independent recovery treatment device.

2. The spinneret pyrohydrolysis vacuum oxidation furnace of claim 1, wherein: the steam heater (14) is arranged at the lower side of the furnace body (4) in parallel, one end of the steam heater (14) is communicated with a steam pipeline (8) loop in the hearth (4) through a high-temperature steam inlet (6), the other end of the steam heater is connected with a steam-water separator (24), and an inlet of the steam-water separator (24) is communicated with a gas source for providing saturated steam; saturated steam from an air source is subjected to steam-water separation (24) through a steam-water separator (24), is subjected to secondary heating through a steam heater (14), and is sprayed into a hearth (4) through a plurality of steam spraying holes on a high-temperature steam inlet (6), a steam pipeline (8) and a steam pipeline (8) loop to perform hydrolytic oxidation on a heated workpiece (3).

3. The spinneret pyrohydrolysis vacuum oxidation furnace of claim 1 or 2, wherein: the electric heating element (7) is a ceramic heating belt and is arranged on the outer side of the hearth; the furnace body (4) is a double-layer heat preservation furnace body, and the ceramic heating belt (7) is arranged in the heat preservation layer outside the hearth.

4. The spinneret pyrohydrolysis vacuum oxidation furnace of claim 1 or 2, wherein: the condenser (27) additionally arranged in the steam recovery processing device is connected in series with the preorder of the steam spray washing tower (26) and is communicated with the steam spray washing tower (26) through a pipeline; when steam is heated, recovered steam from the hearth (4) is firstly connected into a condenser (27) from a steam outlet (9) for rapid cooling treatment, and then is sent into a steam spray washing tower (26) for washing and separation treatment, and spray wastewater is directly sent into a wastewater collection tank (27); the condensate in the condenser (27) is also discharged directly into a waste water collection tank (27).

5. The spinneret pyrohydrolysis vacuum oxidation furnace of claim 1 or 2, wherein: when the waste gas treatment device is electrically heated, the vacuum pump (23) is started simultaneously, and the hearth is in a vacuum state; polymer smog generated by electric heating combustion enters the spraying tank (22) from the waste gas outlet (11) to be washed and separated under the action of negative pressure of the hearth, spraying wastewater in the spraying tank (22) is directly discharged into the wastewater collecting tank (27) to be treated in a centralized manner, and a water storage tank (28) is also arranged between the spraying tank (22) and the vacuum pump (23).

6. The spinneret pyrohydrolysis vacuum oxidation furnace of claim 1 or 2, wherein: the waste gas treatment device and the steam recovery treatment device respectively work independently and operate sequentially; when the electric heating is carried out, the waste gas treatment device is started, and the steam recovery treatment device is closed; when the steam is heated, the steam recovery processing device is started, and the waste gas processing device is closed.

7. The spinneret pyrohydrolysis vacuum oxidation furnace of claim 1 or 2, wherein: an air cylinder (30) is arranged on the furnace body on one side of the furnace door, and the furnace door is tightly pressed on the furnace body through the air cylinder (30) to tightly press and seal the hearth (4).

8. The spinneret pyrohydrolysis vacuum oxidation furnace of claim 1 or 2, wherein: the workpiece supports (2) are arranged in a double-layer mode on the inner side of the furnace door (1), each layer of workpiece support (2) is designed to be in a grid shape, and the heated workpieces (3) are vertically placed in the grids of the workpiece supports (2).

9. The spinneret pyrohydrolysis vacuum oxidation furnace of claim 1, wherein: the heating process of the invention can adopt a process sequence of firstly heating steam and then heating electricity or firstly heating electricity and then heating steam as required:

When steam is heated, the saturated steam at 150 ℃ which is sent from an external source is firstly subjected to steam-water separation by a steam-water separator (24), part of water in the steam-water separation becomes dry steam after being separated, and then the dry steam is secondarily heated to superheated steam at about 300 ℃ by a steam heater (14), then is sent into a pipeline loop of a steam pipeline (8) in the hearth (4) through a steam inlet (6), a plurality of steam injection small holes are uniformly distributed on the steam pipeline (8), high-temperature steam is injected into the hearth (4) through the injection small holes and carries out high-temperature steam injection heating on heated workpieces (3) such as a spinneret plate and the like, so that about 80% of the polymer adhered to the spinneret is hydrolyzed and melted at a high temperature, the polymer waste flows into a waste collecting tank (12) at the lower side of the furnace body (5), and is collected and then treated in a centralized way, thereby achieving the purpose of hydrolysis, oxidation and cleaning; in order to keep the high-temperature steam pressure in the hearth (4) balanced and stable, at the moment, a steam recovery treatment device in a steam fog post-treatment device is started simultaneously, polymer mixed steam with small molecular chains in the hearth (4) firstly enters a condenser (27) through a steam outlet (9) for cooling and condensing treatment, then is sent into a steam spraying washing tower (26) for spraying, washing and cooling treatment again, harmful gas is absorbed, and the washed wastewater is directly discharged into a wastewater collecting tank (25) for centralized treatment and is discharged after reaching the standard;

when the furnace is electrically heated, a ceramic heating belt (7) wound on the outer wall of the furnace (4) carries out high-temperature electric radiation heating on the interior of the furnace (4) through an external power supply, the temperature in the furnace (4) is continuously heated to 300-400 ℃, a vacuum pump (23) is started at the same time, the interior of the furnace (4) is in a vacuum state, a small amount of unmelted high polymer is subjected to vacuum cracking, and the waste after combustion and melting directly flows into a waste collecting tank (12); when the temperature in the hearth (4) is continuously raised to 400-450 ℃, introducing fresh air to fully oxidize and burn the residual polymer; the waste gas treatment device in the steam fog post-treatment device is started simultaneously, the hearth (4) is under the negative pressure effect, waste gas generated during polymer combustion is sucked into the spraying tank (22) through the waste gas outlet (11) to be sprayed, washed and cooled, and treated waste water is directly discharged into the waste water collecting tank (25) or is overflowed, precipitated and purified through the water storage tank (28) and then discharged into the waste water collecting tank (25).

Technical Field

the invention relates to a heating furnace in chemical fiber machinery, in particular to a vacuum oxidation furnace which utilizes high-temperature steam and a ceramic heating element as heat sources to carry out high-temperature hydrolysis separation on a melt on a spinneret plate.

Background

The applicant filed a patent of 'a horizontal spinneret plate high-temperature hydrolysis oxidation furnace' on 11/8 in 2018, with the patent number of 2018218363179, and the granted date of 2019, 5/28. The utility model discloses a steam and electric combined heating horizontal hydrolysis oxidation furnace, which introduces high-temperature steam on the basis of the traditional electric heating to fully hydrolyze and melt chemical fiber raw materials attached to a spinneret plate so as to achieve the purpose of cleaning components; the oxidizing gas fog generated by the electric heating element and the high-temperature steam are respectively sprayed and washed for subsequent treatment, so that the environmental pollution is reduced; the opening and closing of the furnace door are independently controlled by a motor, so that the operation is convenient, and the time and the labor are saved; the furnace door, the furnace body and the vapor fog post-processing device adopt a modular frame design, and the structure is compact.

Although the above utility model has many innovations, there are still many disadvantages to be improved. Firstly, although the opening and closing of the furnace door are electrically moved, the closing of the furnace door and the furnace body needs to be manually locked and closed through bolts, so that the labor intensity is high; secondly, the steam fog post-treatment process still needs to be further optimized and improved, wherein high-temperature recovered steam directly enters a spray tower, so that the water consumption is large and the waste is serious; and thirdly, high-temperature steam is directly heated by the heater and then is sent into the furnace body, and the steam in the hearth contains a large amount of water and can be discharged into the waste collecting tank along with the waste, so that the inner wall of the hearth and the waste collecting tank are seriously stuck and difficult to clean.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a spinneret plate high-temperature hydrolysis vacuum oxidation furnace. On the basis of ensuring the prior steam and electricity combined heating, hydrolyzing and oxidizing cleaning technology, the whole machine structure and the process route are further optimally designed, the automation degree and the working efficiency are improved, and the service lives of equipment and a spinneret plate are prolonged.

The technical scheme of the invention is that the steam fog post-treatment device comprises a furnace body 5, a furnace door 1 and a steam fog post-treatment device 10, wherein an electric heating element 7 is laid on the furnace body 5, a waste collecting tank 12 is arranged on the lower side of the furnace body 5, and the furnace door 1 and the steam fog post-treatment device 10 are respectively arranged at the left end and the right end of the furnace body 5; a steam pipeline 8 loop with a plurality of steam injection holes and a workpiece track 13 for supporting the workpiece support 2 to run are laid in the hearth 4, the furnace door 1 is driven to open and close by a motor 16 through a gear 15 and a rack 18, and the workpiece support 2 for placing the workpiece is arranged on the inner side of the furnace door 1 and is opened and closed together with the furnace door 1; a steam heater 14 which can carry out secondary heating on the heat source steam is arranged outside the furnace body 5; the steam fog post-treatment device 10 comprises a steam recovery treatment device and a waste gas treatment device generated by overheating combustion during electric heating; the method is characterized in that: the steam recovery processing device consists of a condenser 27, a steam spray washing tower 26 and a wastewater collection tank 27, the waste gas processing device consists of a spray tank 22, a vacuum pump 23 and a water storage tank 28, the waste gas processing device and the steam recovery processing device share one wastewater collection tank 27, and the wastewater in the spray tank 22 is directly discharged into the wastewater collection tank 27; the waste gas treatment device and the steam recovery treatment device are respectively communicated with the hearth 4 through a steam outlet 9 and a waste gas outlet 11 to form an independent recovery treatment device.

the steam heater 14 is arranged at the lower side of the furnace body 4 in parallel, one end of the steam heater 14 is communicated with a steam pipeline 8 loop in the hearth 4 through a high-temperature steam inlet 6, the other end of the steam heater is connected with a steam-water separator 24, and the inlet of the steam-water separator 24 is communicated with a gas source for providing saturated steam; saturated steam from an air source is subjected to steam-water separation 24 through a steam-water separator 24, secondary heating is performed through a steam heater 14, and then superheated high-temperature steam is sprayed into the hearth 4 through a high-temperature steam inlet 6, a steam pipeline 8 and a plurality of steam spraying holes in a steam pipeline 8 loop to perform hydrolytic oxidation on the heated workpiece 3.

The electric heating element 7 is a ceramic heating belt and is arranged on the outer side of the hearth; the furnace body 4 is a double-layer heat preservation furnace body, and the ceramic heating belt 7 is arranged in the heat preservation layer outside the hearth.

The steam recovery processing device is additionally provided with a condenser 27 which is connected in series with the preorder of the steam spray washing tower 26 and is communicated with the steam spray washing tower 26 through a pipeline; when steam is heated, recovered steam from the hearth 4 is firstly introduced into a condenser 27 from a steam outlet 9 for rapid cooling treatment, and then is sent into a steam spray washing tower 26 for washing and separation treatment, and spray wastewater is directly sent into a wastewater collection tank 27; the condensed water in the condenser 27 is also directly discharged into a waste water collection tank 27.

In the waste gas treatment device, when the furnace is electrically heated, the vacuum pump 23 is started simultaneously, and the furnace chamber is in a vacuum state; polymer smog produced by electric heating combustion enters the spraying tank 22 from the waste gas outlet 11 for washing and separating treatment under the action of negative pressure of the hearth, spraying wastewater in the spraying tank 22 is directly discharged into a wastewater collecting tank 27 for centralized treatment, and a water storage tank 28 is also arranged between the spraying tank 22 and the vacuum pump 23.

The waste gas treatment device and the steam recovery treatment device respectively work independently and operate sequentially; when the electric heating is carried out, the waste gas treatment device is started, and the steam recovery treatment device is closed; when the steam is heated, the steam recovery processing device is started, and the waste gas processing device is closed.

The air cylinder 30 is arranged on the furnace body at one side of the furnace door, and the furnace door is tightly pressed on the furnace body through the air cylinder 30 to tightly press and seal the hearth 4.

The workpiece supports 2 are arranged in a double-layer mode on the inner side of the furnace door 1, each layer of workpiece support 2 is designed to be in a grid shape, and the heated workpieces 3 are vertically placed in the grids of the workpiece supports 2.

The heating process of the invention can adopt a process sequence of firstly heating steam and then heating electricity or firstly heating electricity and then heating steam as required:

When steam is heated, 150 ℃ saturated steam fed from an external source is subjected to steam-water separation by a steam-water separator 24, part of water in the steam-water separation is separated to form dry steam, the dry steam is subjected to secondary heating to about 300 ℃ superheated steam by a steam heater 14, and then the superheated steam is fed into a pipeline loop of a steam pipeline 8 in a hearth 4 through a steam inlet 6, a plurality of steam injection small holes are uniformly distributed on the steam pipeline 8, high-temperature steam is injected into the hearth 4 through the injection small holes, and high-temperature steam injection heating is performed on a heated workpiece 3 such as a spinneret plate and the like, so that about 80% of polymers attached to the spinneret plate are hydrolyzed and melted in a high-temperature state, polymer waste materials flow into a waste material collecting tank 12 on the lower side of a furnace body 5, and are collected and then subjected to centralized treatment, and the aim of hydrolytic oxidation cleaning is. In order to keep the high-temperature steam pressure in the hearth 4 balanced and stable, at the moment, a steam recovery processing device in the steam fog post-processing device is started simultaneously, polymer mixed steam with small molecular chains in the hearth 4 firstly enters a condenser 27 through a steam outlet 9 for cooling and condensation processing, and then is sent into a steam spraying washing tower 26 for spraying, washing and cooling processing again, so that harmful gas is absorbed. The washed wastewater is directly discharged into a wastewater collecting tank 25 for centralized treatment and is discharged after reaching the standard;

When the furnace is electrically heated, the ceramic heating belt 7 wound on the outer wall of the furnace 4 is used for heating the interior of the furnace 4 by high-temperature electric radiation through an external power supply, the temperature of the furnace 4 is continuously heated to 300-400 ℃, the vacuum pump 23 is started at the same time, the interior of the furnace 4 is in a vacuum state, a small amount of unmelted high polymer is subjected to vacuum cracking, and the waste after combustion and melting directly flows into the waste collection tank 12; when the temperature of the hearth 4 is continuously raised to about 400-450 ℃, introducing fresh air to fully oxidize and burn the residual polymer; at the moment, a waste gas treatment device in the steam fog post-treatment device is started, the furnace chamber 4 is under the action of negative pressure, waste gas generated during polymer combustion is sucked into the spraying tank 22 through the waste gas outlet 11 for spraying, washing and cooling treatment, and the treated waste water is directly discharged into the waste water collecting tank 25 or is discharged into the waste water collecting tank 25 after overflowing, precipitating and purifying through the water storage tank 28.

compared with the prior art, the invention has the advantages that: the structure and the process are more reasonable and optimized, and the technical performance is good. Firstly, a steam-water separator is added in front of a steam heater, so that saturated steam from an air source is subjected to a steam-water separation process firstly, the water content of high-temperature steam entering the steam heater and a hearth is reduced, the steam heater, the hearth and heated elements are effectively protected from being oxidized and rusted easily, and the service lives of the steam heater, a furnace body and a spinneret plate are prolonged; secondly, a condenser is added in the steam recovery processing device, so that high-temperature recovery steam in the hearth is quickly cooled in the condenser, and then is sent into a steam spray washing tower for washing and separating processing, and the safety performance of the post-processing device is improved; the furnace door opening and closing motor is independently controlled, and is automatically locked by the air cylinder after being closed, so that the furnace cavity is good in sealing effect, convenient to operate and time-saving and labor-saving; and fourthly, the heated spinneret plate workpieces are vertically placed on the workpiece support, so that the working efficiency of each spinneret plate is greatly improved on the premise of full and uniform heating.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is an expanded view of the vapor post-treatment device 10 of FIG. 1;

FIG. 4 is a left side view of FIG. 1;

FIG. 5 is a process flow diagram of the present invention.

Reference numbers in the figures: 1-furnace door, 2-workpiece support, 3-heated workpiece, 4-furnace chamber, 5-furnace body, 6-high-temperature steam inlet, 7-electric heating element (ceramic heating belt), 8-steam pipeline, 9-steam outlet, 10-steam fog post-treatment device, 11-waste gas outlet, 12-waste material collecting tank, 13-workpiece track, 14-steam heater, 15-gear, 16-motor, 17-workpiece frame roller, 18-rack, 19-furnace door roller, 20-furnace door track, 21-furnace door support, 22-spray tank, 23-vacuum pump, 24-steam-water separator, 25-waste water, 26-steam spray washing collecting tank, 27-condenser, 28-water storage tank, 29-frame, 30-cylinder.

Detailed Description

The invention is described in further detail below with reference to the attached drawing figures:

the invention discloses a spinneret high-temperature hydrolysis vacuum oxidation furnace, which is further optimized and improved on the basis of the prior utility model 'a horizontal spinneret high-temperature hydrolysis oxidation furnace' (patent number 2018218363179).

The invention is mainly applied to a heating furnace for heating components such as a spinneret plate and the like in chemical fiber spinning machinery at high temperature, in particular to a horizontal oxidation furnace for carrying out high-temperature vacuum hydrolysis separation on a melt on the spinneret plate by using high-temperature steam. The chemical fiber spinning polymer raw material attached to the spinneret plate is fully hydrolyzed and melted through a steam and electricity double compound heating process, so that the aim of oxidizing and cleaning is fulfilled. The heated workpiece in the invention mainly refers to a spinneret plate in a spinneret plate device.

The invention is composed of a furnace body 5, a furnace door 1 and a steam fog post-processing device 10.

An electric heating element 7 is laid on the furnace body 5, a waste collecting tank 12 is arranged on the lower side of the furnace body 5, and the furnace door 1 and the steam fog post-treatment device 10 are respectively arranged at the left end and the right end of the furnace body 5; a steam pipeline 8 loop with a plurality of steam injection holes and a workpiece track 13 for supporting the workpiece support 2 to run are laid in the hearth 4, the furnace door 1 is driven to open and close by a furnace door electric opening and closing device, and the workpiece support 2 for placing the workpiece is arranged on the inner side of the furnace door 1 and is opened and closed together with the furnace door 1.

A steam heater 14 capable of secondarily heating the heat source steam is arranged outside the furnace body 5. The steam heater 14 is arranged at the lower side of the furnace body 4 in parallel, one end of the steam heater 14 is communicated with a steam pipeline 8 loop in the hearth 4 through a high-temperature steam inlet 6, the other end of the steam heater is connected with a steam-water separator 24, and the inlet of the steam-water separator 24 is communicated with a gas source for providing saturated steam; saturated steam from an air source is subjected to steam-water separation 24 through a steam-water separator 24, secondary heating is performed through a steam heater 14, and then superheated high-temperature steam is sprayed into the hearth 4 through a high-temperature steam inlet 6, a steam pipeline 8 and a plurality of steam spraying holes in a steam pipeline 8 loop to perform hydrolytic oxidation on the heated workpiece 3.

The electric heating element 7 is a ceramic heating belt and clings to the outer side of the hearth; the furnace body 4 is a double-layer heat preservation furnace body, and the ceramic heating belt 7 is arranged in the heat preservation layer outside the hearth.

The steam fog post-treatment device 10 is also provided with two post-treatment devices of steam and electricity, namely a steam recovery treatment device and a waste gas treatment device generated by overheating combustion during electric heating. The steam recovery processing device comprises a condenser 27, a steam spray washing tower 26 and a wastewater collection tank 27, the waste gas processing device comprises a spray tank 22, a vacuum pump 23 and a water storage tank 28, the waste gas processing device and the steam recovery processing device share the wastewater collection tank 27, and wastewater in the spray tank 22 is directly discharged into the wastewater collection tank 27. The waste gas treatment device and the steam recovery treatment device are respectively communicated with the hearth 4 through a steam outlet 9 and a waste gas outlet 11 to form an independent recovery treatment device.

The steam recovery processing device is additionally provided with a condenser 27 which is connected in series with the preorder of the steam spray washing tower 26 and is communicated with the steam spray washing tower 26 through a pipeline; when steam is heated, recovered steam from the hearth 4 is firstly introduced into a condenser 27 from a steam outlet 9 for rapid cooling treatment, and then is sent into a steam spray washing tower 26 for washing and separation treatment, and spray wastewater is directly sent into a wastewater collection tank 27; the condensed water in the condenser 27 is also directly discharged into a waste water collection tank 27.

in the waste gas treatment device, when the furnace is electrically heated, the vacuum pump 23 is started simultaneously, and the furnace chamber is in a vacuum state; polymer smog produced by electric heating combustion enters the spraying tank 22 from the waste gas outlet 11 for washing and separating treatment under the action of negative pressure of the hearth, spraying wastewater in the spraying tank 22 is directly discharged into a wastewater collecting tank 27 for centralized treatment, and a water storage tank 28 is also arranged between the spraying tank 22 and the vacuum pump 23.

The electric furnace door opening and closing device comprises a motor 16, a gear 15, a rack 18, a furnace door track 20, a furnace door roller 19, a furnace door bracket 21, a workpiece bracket 2, a workpiece bracket roller 17 and a workpiece track 13, wherein the furnace door track 20 is fixed on a whole machine frame 29. The outer side of the oven door 1 is connected with a rack 18 through an oven door bracket 21, the rack 18 is provided with an oven door roller 19, and the oven door roller 19 is supported on an oven door track 20 to roll and move. The motor 16 drives the oven door bracket 21 through the gear 15 and the rack 18 to push the oven door 1 to move horizontally, so as to realize the opening or closing action of the oven door 1. The workpiece support 2 is fixed on the inner side of the furnace door 1, the workpiece rail 13 is arranged on the bottom side of the furnace chamber 4, and the workpiece support 2 moves on the workpiece rail 13 through the workpiece support roller 17, so that the workpiece support 2 can carry the heated spinneret plate workpiece to move stably in the furnace chamber 4.

The end wall of the furnace body 5 at one side of the furnace door 1 is provided with the air cylinder 30, and when the furnace door 1 is closed, the air cylinder 30 is automatically pressed on the furnace body so as to pneumatically press and seal the hearth 4.

The workpiece supports 2 are arranged on the inner side of the furnace door 1 in a double-layer mode, each layer of workpiece support 2 is designed to be in a grid shape, and the heated workpieces 3 are vertically placed in the grids of the workpiece supports 2, so that the number of the heated workpieces is greatly increased, and the working efficiency is improved.

The heating process of the invention can adopt a process sequence of firstly heating steam and then heating electricity or firstly heating electricity and then heating steam as required:

When steam is heated, 150 ℃ saturated steam fed from an external source is subjected to steam-water separation by a steam-water separator 24, part of water in the steam-water separation is separated to form dry steam, the dry steam is subjected to secondary heating to about 300 ℃ superheated steam by a steam heater 14, and then the superheated steam is fed into a pipeline loop of a steam pipeline 8 in a hearth 4 through a steam inlet 6, a plurality of steam injection small holes are uniformly distributed on the steam pipeline 8, high-temperature steam is injected into the hearth 4 through the injection small holes, and high-temperature steam injection heating is performed on a heated workpiece 3 such as a spinneret plate and the like, so that about 80% of polymers attached to the spinneret plate are hydrolyzed and melted in a high-temperature state, polymer waste materials flow into a waste material collecting tank 12 on the lower side of a furnace body 5, and are collected and then subjected to centralized treatment, and the aim of hydrolytic oxidation cleaning is. In order to keep the high-temperature steam pressure in the hearth 4 balanced and stable, at the moment, a steam recovery processing device in the steam fog post-processing device is started simultaneously, polymer mixed steam with small molecular chains in the hearth 4 firstly enters a condenser 27 through a steam outlet 9 for cooling and condensation processing, and then is sent into a steam spraying washing tower 26 for spraying, washing and cooling processing again, so that harmful gas is absorbed. The washed wastewater is directly discharged into a wastewater collecting tank 25 for centralized treatment and is discharged after reaching the standard;

When the furnace is electrically heated, the ceramic heating belt 7 wound on the outer wall of the furnace 4 is used for heating the interior of the furnace 4 by high-temperature electric radiation through an external power supply, the temperature of the furnace 4 is continuously heated to 300-400 ℃, the vacuum pump 23 is started at the same time, the interior of the furnace 4 is in a vacuum state, a small amount of unmelted high polymer is subjected to vacuum cracking, and the waste after combustion and melting directly flows into the waste collection tank 12; when the temperature of the hearth 4 is continuously raised to about 450 ℃, introducing fresh air to ensure that the residual polymer is fully oxidized and combusted; at the moment, a waste gas treatment device in the steam fog post-treatment device is started, the furnace chamber 4 is under the action of negative pressure, waste gas generated during polymer combustion is sucked into the spraying tank 22 through the waste gas outlet 11 for spraying, washing and cooling treatment, and the treated waste water is directly discharged into the waste water collecting tank 25 or is discharged into the waste water collecting tank 25 after overflowing, precipitating and purifying through the water storage tank 28.

the vapor recovery processing device and the waste gas processing device in the vapor post-processing device 10 must operate independently in sequence, but cannot operate simultaneously. When the vapor recovery processing device is started, the vacuum pump 23 must be turned off to stop the exhaust gas processing device; when the exhaust gas treatment device is started, the valve of the steam inlet 9 must be closed, so that the steam recovery treatment device is in a closed state.

The condenser 27, the steam spray washing tower 26 and the spray tank 22 are respectively externally connected with circulating cooling water.

The invention optimizes the structure and process design of the prior art. Firstly, an electric heating element of a furnace body 5 is changed into a ceramic heating belt 7 from an electric heating wire and is arranged on the outer side of a hearth, so that the space of the hearth 4 is increased on the premise of ensuring the heat efficiency; the second time, the air cylinder 30 locking mechanism is additionally arranged at the furnace door 1, so that the furnace door 1 realizes pneumatic automatic locking; thirdly, when external saturated steam is connected, a steam-water separator 24 is additionally arranged, firstly, steam-water separation is carried out on moisture in the external saturated steam, and then high-temperature overheating heating is carried out, so that the moisture content of the steam sent into the hearth 4 is greatly reduced, the possibility of easy oxidation and rust of metal equipment such as the hearth, a spinneret plate and the like is reduced, and the service lives of the equipment and the spinneret plate are prolonged; fourthly, a condenser 27 is additionally arranged in the steam recovery processing device and is arranged in the preorder of the steam spraying washing tower 26, and the subsequent steam post-processing is carried out on the premise of fully reducing the steam temperature, so that the safety of the process is improved; fifthly, the workpiece supports 2 are further optimally designed, a workpiece double-layer placing design method is adopted, each layer of workpiece support is designed to be in a grid shape, the heated workpieces 3 are vertically placed in the grids of the workpiece supports 2, the number of the heated workpieces 3 is greatly increased, and the workpiece efficiency is improved.