CN216986410U

CN216986410U - Vacuum degassing device

Info

Publication number: CN216986410U
Application number: CN202220364897.6U
Authority: CN
Inventors: 霍志东; 吴富阳; 蒋桥兵; 李龙
Original assignee: Zhejiang Hangzhen Energy Technology Co ltd
Current assignee: Zhejiang Hangzhen Energy Technology Co ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-07-19
Anticipated expiration: 2032-02-23

Abstract

The utility model relates to a vacuum degassing device, including real empty room device, vacuum pipe-line system, vacuum power device, electrical system, real empty room device, vacuum pipe-line system, vacuum power device communicate in proper order, and the ladle is arranged in real empty room device, and electrical system is provided with the controller, and the controller all is connected characterized by with real empty room device, vacuum pipe-line system, vacuum power device: the vacuum chamber device comprises a pneumatic baffle mechanism, a vacuum tank and a vacuum cover, wherein the vacuum cover is arranged on the vacuum tank, a sealing ring is arranged on the vacuum tank, an argon system is communicated into the vacuum tank, the pneumatic baffle mechanism is connected with a controller, and the pneumatic baffle mechanism is arranged on the vacuum tank and matched with the sealing ring. The vacuum tank is also provided with a bleed-out detection device, and the controller is connected with the bleed-out detection device. The application has the advantages of long service life, low production cost and good safety.

Description

Vacuum degassing device

Technical Field

The application relates to a vacuum degassing device which is mainly suitable for technical occasions needing production in a vacuum environment.

Background

The vacuum degassing device is one of the most widely used external refining equipment in the world at present. The vacuum degassing device has multiple functions of vacuum degassing, argon blowing and stirring, non-vacuum temperature measurement sampling, wire feeding and the like. Can refine bearing steel, alloy structural steel, spring steel, high-quality carbon steel and the like. Because it has strong vacuum degassing capacity, it can ensure that the contents of hydrogen, oxygen and nitrogen in the steel are up to minimum level, and can accurately regulate molten steel components to make inclusion fully float upwards so as to effectively raise cleanliness of steel. The vacuum degassing device in the prior art is a VD vacuum chamber device, a vacuum pipeline, a vacuum main valve, a steam jet vacuum pump and an energy medium matching and automatic control system, a sealing ring on a vacuum tank is easily burnt by steel slag on a vacuum cover, and a special detection device is not arranged during steel leakage, so that the safety is influenced; in addition, the conventional VD vacuum degassing apparatus needs to be equipped with a steam supply system with high safety requirement and a turbid circulating water system with huge water amount, and the operation cost is high.

Disclosure of Invention

The technical problem that this application was solved is to overcome the above-mentioned not enough that exists among the prior art, and provides a structure succinct, long service life, low in production cost, the good vacuum degassing device of security.

The technical scheme adopted by the application for solving the technical problems is as follows: a vacuum degassing device comprises a vacuum chamber device, a vacuum pipeline system, a vacuum power device and an electric control system, wherein the vacuum chamber device, the vacuum pipeline system and the vacuum power device are sequentially communicated, a steel ladle is arranged in the vacuum chamber device, the electric control system is provided with a controller, and the controller is connected with the vacuum chamber device, the vacuum pipeline system and the vacuum power device, and is characterized in that the vacuum chamber device comprises a pneumatic baffle mechanism, a vacuum tank and a vacuum cover, the vacuum cover is arranged on the vacuum tank, a sealing ring is arranged on the vacuum tank, an argon system is communicated into the vacuum tank to stir molten steel, in order to prevent high-temperature steel slag on the vacuum cover from falling and burning the sealing ring when the vacuum cover is moved after vacuum smelting is finished, the pneumatic baffle mechanism is arranged on the vacuum tank and is matched with the sealing ring, when the vacuum cover is opened, the sealing ring on the vacuum tank is popped up and covered, and the service life of the sealing ring is prolonged.

Still be provided with bleed-out detection device on this application vacuum tank, the controller is connected with bleed-out detection device, and the controller reports to the police and closes all devices, the security of improve equipment operation when detecting abnormal conditions through bleed-out detection device.

The vacuum power device adopts a mechanical vacuum pump set, the mechanical vacuum pump set comprises a four-stage water ring pump set, a three-stage Roots pump set, a two-stage Roots pump set, a one-stage Roots pump set and a pump side emptying valve, the four-stage spiral water ring pump set is formed by connecting a plurality of water ring pumps in parallel, the output end of the four-stage water ring pump set is connected with the atmosphere, the input end of the four-stage screw water ring pump is connected with the output end of the three-stage Roots pump set, the input end of the three-stage Roots pump set is connected with the output end of the two-stage Roots pump set, the input end of the two-stage Roots pump set is connected with the output end of the one-stage Roots pump set, the input end of the one-stage Roots pump set is provided with the pump side emptying valve, a flow detection device, the pump side emptying valve, the flow detection device and a controller.

The vacuum pipeline system comprises a vacuum pipeline, a fire retardant filter, a pneumatic vacuum breaking device, a manual vacuum breaking device, a first vacuum main valve, a bypass valve, a bag-type dust remover, an explosion-proof device and a second vacuum main valve, the fire-retardant filter and the bag-type dust remover are connected between the vacuum chamber device and the mechanical vacuum pump set through vacuum pipelines, a pneumatic vacuum breaking device, a manual vacuum breaking device, a waste gas temperature detection device and a first vacuum main valve are arranged on the vacuum pipeline between the fire-retardant filter and the bag-type dust remover, an explosion-proof device, a dust detection device, a pressure detection device and a second vacuum main valve are arranged on the vacuum pipeline between the bag-type dust remover and the mechanical vacuum pump set, bypass valves are installed on two sides of the first vacuum main valve, and the pneumatic vacuum breaking device, the waste gas temperature detection device, the dust detection device, the pressure detection device, the first vacuum main valve, the second vacuum main valve and the bypass valves are all connected with a controller.

This application vacuum pipe periphery between vacuum tank and the back-fire relief filter is provided with water cooling plant, water cooling plant and cooling water system intercommunication, and water cooling plant is connected with the controller.

The vacuum degassing device adopts a mechanical vacuum pump set specially designed according to a VD smelting process to provide required vacuum conditions for VD vacuum degassing of molten steel. The flue gas pretreatment system composed of a fire retardant filter and a bag-type dust remover ensures that the particulate matter-containing waste gas generated by VD degassing enters a mechanical vacuum pump set after being purified, thereby ensuring the service life and the long-term use stability of the vacuum pump set. Also because this application has adopted this set of flue gas pretreatment system, VD degasification tail gas can discharge up to standard, and a whole set of process equipment can be applied and promoted under the condition that satisfies the environmental protection requirement.

The controller adopts a PLC or an industrial personal computer and transmits programmable logic controller to acquire and process all real-time on-site analog quantity and switching value detection data through a TCP/IP Ethernet, thereby realizing the monitoring of the main equipment of the vacuum degassing device.

Compared with the prior art, the application has the following advantages and effects: the steam jet vacuum pump has the advantages of simple structure, long service life, low production cost and good safety, and adopts a mechanical vacuum pump set with special design to replace the traditional steam jet vacuum pump. In order to ensure that the mechanical vacuum pump normally operates under the VD vacuum degassing working condition, the flue gas is filtered and cooled through a vacuum pipeline system, the temperature of the flue gas entering a mechanical vacuum pump group is ensured to be lower than 60 ℃, and the content of particles is ensured to be lower than 20mg/m³The operating requirements of (c). Because the vacuum pipeline system adopts the bag-type dust collector as the flue gas purification unit, the environmental protection emission requirement which is increasingly required can be well met.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

In the figure: the device comprises an argon system 1, a steel leakage detection device 2, a pneumatic baffle mechanism 3, a vacuum tank 4, a steel ladle 5, a vacuum cover 6, a vacuum pipeline 7, a water cooling device 71 on the vacuum pipeline 7, a first vacuum degree detection device 8, a fire retardant filter 9, a pneumatic vacuum breaking device 10, a manual vacuum breaking device 11, a waste gas temperature detection device 12, a first vacuum main valve 13, a bypass valve 14, a bag-type dust remover 15, an explosion-proof device 16, a dust detection device 17, a pressure detection device 18, a second vacuum main valve 19, a second vacuum degree detection device 20, a cooling water system 21, a nitrogen system 22, a flow measurement device 23, a pump side vacuum breaking valve 24, a first-level roots pump set 25, a second-level roots pump set 26, a third-level roots pump set 27 and a fourth-level water ring pump set 28.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present application and are not limited to the following examples.

Referring to fig. 1, the embodiment of the present application mainly includes a vacuum chamber device a, a vacuum pipeline system B, a mechanical vacuum pump group C, a detection system, and an electric control system, and a matched medium system provides the above devices with required electricity, compressed air, nitrogen, argon, cooling water, and hydraulic power.

The vacuum chamber device a includes: pneumatic baffle mechanism 3, vacuum tank 4, ladle 5, vacuum lid 6, pneumatic baffle mechanism 3 is connected with the controller, reports to the police and closes all devices when the controller detects abnormal conditions through bleed-out detection device 2, and pneumatic baffle mechanism 3 installs on vacuum tank 4 and pops out when vacuum lid 6 is opened and covers the sealing washer (not shown on the drawing) on vacuum tank 4, and the slag drops to burning the sealing washer when preventing that vacuum lid 6 from opening.

The vacuum piping system B includes: the device comprises a vacuum pipeline 7, a fire retardant filter 9, a pneumatic vacuum breaking device 10, a manual vacuum breaking device 11, a first vacuum main valve 13, a bypass valve 14, a bag-type dust remover 15, an explosion-proof device 16 and a second vacuum main valve 19. The fire-retardant filter 9 and the bag-type dust collector 15 are connected between the vacuum chamber device A and the mechanical vacuum pump set C through vacuum pipelines, a pneumatic vacuum breaking device 10, a manual vacuum breaking device 11, a waste gas temperature detection device 12 and a first vacuum main valve 13 are arranged on the vacuum pipeline between the fire-retardant filter 9 and the bag-type dust collector 15, an explosion-proof device 16, a dust detection device 17, a pressure detection device 18 and a second vacuum main valve 19 are arranged on the vacuum pipeline between the bag-type dust collector 15 and the mechanical vacuum pump set C, bypass valves 14 are installed on two sides of the first vacuum main valve 13 (connected with the first vacuum main valve 13 in parallel), the bypass valve 13 is opened first before the first vacuum main valve 13 is opened, pressure equalization is carried out before the first vacuum main valve 13 is opened, so as to ensure that the first vacuum main valve 13 is opened smoothly, and the pneumatic vacuum breaking device 10, the waste gas temperature detection device 12, the dust detection device 17, the pressure detection device 18, The first vacuum main valve 13, the second vacuum main valve 19 and the bypass valve 14 are all connected with the controller.

The periphery of the vacuum pipeline 7 near the vacuum tank 4 between the vacuum tank 4 and the fire retardant filter 7 is provided with a water cooling device 71, the water cooling device 71 is communicated with the cooling water system 21 and is used for reducing the gas temperature entering the fire retardant filter 7, and the water cooling device 71 is connected with a controller.

Mechanical vacuum pump package C includes level four water ring pump package 28, tertiary roots pump package 27, second grade roots pump package 26, one-level roots pump package 25, broken empty valve 24 of pump side, level four water ring pump package 28 connect its output to atmosphere after parallelly connected by a plurality of water ring pump, level four water ring pump package 28 input termination tertiary roots pump package 27 (parallelly connected by a plurality of roots pump) output, tertiary roots pump package 27's output termination second grade roots pump package 26 (parallelly connected by a plurality of roots pump) output, second grade roots pump package 26 input termination one-level roots pump package 25 (parallelly connected by a plurality of roots pump) output, one-level roots pump package 25 input and vacuum pipe system output intercommunication, be used for providing mechanical vacuum power.

The detection system is in the prior art, is connected with a controller of an electric control system, and comprises a bleed-out detection device 2 arranged on a vacuum chamber device A; the vacuum degree detection device I8, the waste gas temperature detection device 11, the dust detection device 17, the pressure detection device 18 and the vacuum degree detection device II 20 are installed on the vacuum pipeline system B; the flow detection device 23 is used for the mechanical vacuum pump set C.

The media systems, which are all combined applications of the prior art, include the argon gas system 1, the cooling water system 21, the nitrogen gas system 22, and the prior art not shown in the figure, such as a compressed air system (which can also be replaced by a nitrogen gas system) and a hydraulic system. Wherein the nitrogen system 22 is used for breaking the bag-type dust remover 15, reversely blowing the filter bag and filling nitrogen to protect the filter bag when the device is not used for a long time. Because the waste gas generated in the vacuum degassing process contains combustible substances such as aluminum powder, magnesium powder and the like, the nitrogen can be used for preventing the filter bag from being burnt due to spontaneous combustion of aluminum and magnesium after the filter bag is contacted with air.

The electric control system, not shown in the figure, in the prior art, realizes the electric automatic control of each device through a controller in the system, and is specifically customized according to the requirements of users.

The specific application process of the embodiment of the application is as follows:

the method comprises the steps of placing a steel ladle with molten steel in a vacuum chamber, taking a mechanical vacuum pump set specially designed according to VD smelting process requirements as a vacuum power device, starting the mechanical vacuum pump set, reducing the vacuum in the vacuum chamber to be below 67Pa in working vacuum degree within process specified time, keeping the vacuum for about 15-20 minutes, carrying out vacuum degassing, stopping the mechanical vacuum pump set, breaking the vacuum in the vacuum chamber to restore to atmospheric pressure, opening the vacuum chamber, and lifting out the steel ladle until the VD smelting process is finished.

The embodiment of the application has the following advantages:

1. the pneumatic baffle mechanism is arranged to prevent a sealing ring on the vacuum tank from being burnt, and the bleed-out detection device is used for alarming and shutting down when abnormal conditions are detected;

2. the production cost and the energy consumption are low, the occupied area is small, and compared with a steam jet pump scheme, a steam supply system and a turbid circulating water system are reduced, and the cost, the consumption and the occupied area of the two parts are correspondingly reduced;

3. the energy-saving and environment-friendly discharge device has the advantages that the energy is saved, the environment is protected, the operation cost is greatly reduced, the discharge can better meet the environment-friendly requirement, and the working environment of workers is improved.

All simple variations and combinations of the technical features and technical solutions of the present application are considered to fall within the scope of the present application.

Claims

1. The utility model provides a vacuum degassing device, includes real empty room device, vacuum pipe-line system, vacuum power device, electrical system, real empty room device, vacuum pipe-line system, vacuum power device communicate in proper order, and the real empty room device is arranged in to the ladle, and electrical system is provided with the controller, and the controller all is connected characterized by with real empty room device, vacuum pipe-line system, vacuum power device: the vacuum chamber device comprises a pneumatic baffle mechanism, a vacuum tank and a vacuum cover, wherein the vacuum cover is arranged on the vacuum tank, a sealing ring is arranged on the vacuum tank, an argon system is communicated into the vacuum tank, the pneumatic baffle mechanism is connected with a controller, and the pneumatic baffle mechanism is arranged on the vacuum tank and matched with the sealing ring.

2. The vacuum degassing apparatus according to claim 1, wherein: the vacuum tank is also provided with a bleed-out detection device, and the controller is connected with the bleed-out detection device.

3. The vacuum degassing apparatus according to claim 1, wherein: vacuum power device adopts mechanical vacuum pump package, mechanical vacuum pump package includes level four water ring pump package, tertiary roots pump package, second grade roots pump package, one-level roots pump package, pump side break empty valve, level four spiral shell water ring pump package comprises a plurality of water ring pump is parallelly connected, level four water ring pump package output termination atmosphere, level four screw rod water ring pump input termination tertiary roots pump package output, tertiary roots pump package input termination second grade roots pump package output, second grade roots pump package input termination one-level roots pump package output, one-level roots pump package input and vacuum pipe system output intercommunication, tertiary roots pump package, second grade roots pump package, one-level roots pump package comprises a plurality of roots pump is parallelly connected, one-level roots pump package input is provided with pump side break empty valve, flow detection device, pump side break empty valve, flow detection device is connected with the controller.

4. The vacuum degassing apparatus according to claim 1, wherein: the vacuum pipeline system comprises a vacuum pipeline, a fire retardant filter, a pneumatic vacuum breaking device, a manual vacuum breaking device, a first vacuum main valve, a bypass valve, a bag-type dust remover, an explosion-proof device and a second vacuum main valve, the fire-retardant filter and the bag-type dust remover are connected between the vacuum chamber device and the mechanical vacuum pump set through vacuum pipelines, a pneumatic vacuum breaking device, a manual vacuum breaking device, a waste gas temperature detection device and a first vacuum main valve are arranged on the vacuum pipeline between the fire-retardant filter and the bag-type dust remover, an explosion-proof device, a dust detection device, a pressure detection device and a second vacuum main valve are arranged on the vacuum pipeline between the bag-type dust remover and the mechanical vacuum pump set, bypass valves are installed on two sides of the first vacuum main valve, and the pneumatic vacuum breaking device, the waste gas temperature detection device, the dust detection device, the pressure detection device, the first vacuum main valve, the second vacuum main valve and the bypass valves are all connected with a controller.

5. The vacuum degassing apparatus according to claim 4, wherein: and a water cooling device is arranged on the periphery of the vacuum pipeline between the vacuum tank and the fire retardant filter, is communicated with a cooling water system, and is connected with the controller.