Energy-saving and efficient VD refining furnace

Abstract

The utility model relates to the field of smelting equipment, in particular to an energy-saving and efficient VD refining furnace which comprises a VD furnace, a vacuum cover arranged at the upper end of the VD furnace, a vacuum pipe connected with the vacuum cover, a smoke pre-filtering mechanism arranged in the middle of the vacuum pipe, a water ring pump unit connected with the tail end of the vacuum pipe, a conveying pipe arranged on the water ring pump unit, and a vacuum pump unit connected with the conveying pipe. A smoke post-filtering mechanism is arranged at the front end of the vacuum pump unit, the vacuum pump unit comprises a plurality of steam pumps, the steam pumps are connected with the vacuum pump unit, the vacuum pump unit comprises a plurality of steam pumps and a plurality of vacuum pumps connected in series, and the steam pumps are connected with the corresponding vacuum pumps. The device has the advantages of improving efficiency and saving energy.

Description

Technical Field

[0001] The utility model relates to the field of smelting equipment, in particular to an energy-saving and high-efficiency VD refining furnace. Background Art

[0002] A VD furnace is a vacuum induction melting furnace. Its basic principle is to use electromagnetic induction to generate high temperatures to melt metal materials. The VD furnace has the functions of decarburization, degassing, desulfurization, and removing impurities. The vacuum degree of the VD furnace is a key indicator of refining efficiency. Existing vacuum equipment uses a steam pump to drive the vacuum pump. However, due to the high steam demand, it is easy to lead to insufficient steam supply in the workshop. Additional steam needs to be produced to supply the steam pump, resulting in energy waste. Therefore, it is particularly necessary to develop an energy-saving and efficient VD refining furnace. Summary of the Invention

[0003] The purpose of the utility model is to provide an energy-saving and high-efficiency VD refining furnace, which has the advantages of improving refining efficiency and saving energy.

[0004] The technical solutions adopted are as follows:

[0005] An energy-saving and efficient VD refining furnace comprises a VD furnace, wherein a vacuum hood is provided at the upper end of the VD furnace, the vacuum hood is connected to a vacuum tube, a flue gas pre-filtering mechanism is provided in the middle of the vacuum tube, a water ring pump unit is connected to the end of the vacuum tube, the water ring pump unit is provided with a delivery pipe, the delivery pipe is connected to the vacuum pump unit, a flue gas post-filtering mechanism is provided at the front end of the vacuum pump unit, and the vacuum pump unit comprises a plurality of steam pumps and a plurality of vacuum pumps connected in series, and the steam pumps are connected to the corresponding vacuum pumps.

[0006] Preferably, a smoke cooling mechanism is provided on the vacuum tube at the front end of the smoke pre-filter mechanism. The smoke cooling mechanism comprises a shell sleeved on the vacuum tube, and a water inlet pipe and a water outlet pipe are respectively provided at the lower end and the upper end of the shell.

[0007] Preferably, a plurality of heat dissipation fins are provided on the vacuum tube inside the shell.

[0008] Preferably, the flue gas pre-filter mechanism includes a shell, a fan blade is rotatably provided in the shell, an air inlet and an air outlet are respectively provided on the upper and lower sides of the fan blade, and an ash discharge valve is provided at the lower end of the shell.

[0009] Preferably, the flue gas post-filtration mechanism includes a spray-type dust collector.

[0010] Compared with the existing technology, the beneficial effects are:

[0011] 1. The utility model utilizes a water ring pump to evacuate the VD furnace, improves the vacuum degree in the VD furnace, and then utilizes a steam pump to drive a vacuum pump unit to further improve the vacuum degree in the VD furnace. Part of the steam pump is replaced by part of the water ring pump, which saves the use of steam and eliminates the need for the smelting workshop to produce additional steam to supply the steam pump, thus saving energy. At the same time, the water ring pump, steam pump and vacuum pump unit work together to improve the vacuum degree in the VD furnace, and the refining efficiency is higher.

[0012] 2. The utility model is provided with a flue gas pre-filter mechanism and a flue gas post-filter mechanism to filter the flue gas and reduce the damage of the flue gas to the vacuum pump. At the same time, the dust in the flue gas can be mixed with the water in the water ring pump to further reduce the smoke dust in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional structural diagram of an energy-saving and efficient VD refining furnace of the utility model.

[0014] Figure 2 This is a schematic diagram of the top view of an energy-saving and efficient VD refining furnace of the utility model.

[0015] Figure 3 This is a schematic diagram of the internal structure of a flue gas pre-filter mechanism of an energy-saving and efficient VD refining furnace of the present invention;

[0016] In the figure: 1. VD furnace; 2. Vacuum cover; 3. Vacuum tube; 4. Shell; 5. Fan blades; 6. Outer casing; 7. Water inlet pipe; 8. Water outlet pipe; 9. Heat dissipation fins; 10. Water ring pump unit; 11. Spray dust collector; 12. Vacuum pump unit; 13. Steam pump; 14. Delivery pipe. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to specific embodiments. Figures 1 to 3 As shown:

[0018] Example 1: An energy-saving and efficient VD refining furnace includes a VD furnace 1. A vacuum hood 2 is provided at the upper end of the VD furnace 1. The vacuum hood 2 is connected to a vacuum tube 3. A flue gas pre-filter mechanism is provided in the middle of the vacuum tube 3. The flue gas pre-filter mechanism performs preliminary dust removal on solid smoke in the flue gas entering the vacuum tube 3 from the VD furnace 1, thereby reducing the dust content in the flue gas.

[0019] The end of the vacuum tube 3 is connected to a water ring pump unit 10, which is connected to the vacuum tube 3. The water ring pump is used to evacuate the VD furnace 1 to improve the vacuum degree in the VD furnace 1. At the same time, the dust in the flue gas is taken away by the water circulating in the water ring pump. The water circulating in the water ring pump can reduce the dust content in the flue gas. The water ring pump unit 10 is provided with a delivery pipe 14, and the delivery pipe 14 is connected to the vacuum pump unit 12.

[0020] The flue gas output from the water ring pump unit 10 enters the vacuum pump unit 12. A flue gas post-filtration mechanism is provided at the front end of the vacuum pump unit 12. The flue gas post-filtration mechanism filters the flue gas entering the vacuum pump unit 12 to further reduce the dust content in the flue gas. The vacuum pump unit 12 includes multiple steam pumps 13 and multiple vacuum pumps connected in series. The steam pump 13 is connected to the corresponding vacuum pump. The steam pump 13 provides power to the vacuum pump unit 12. The steam generated in the smelting workshop is transported to the steam pump 13 through a steam pipe.

[0021] Example 2: An energy-saving and efficient VD refining furnace includes a VD furnace 1, a vacuum hood 2 is provided at the upper end of the VD furnace 1, the vacuum hood 2 is connected to a vacuum tube 3, a flue gas pre-filter mechanism is provided in the middle of the vacuum tube 3, the flue gas pre-filter mechanism includes a shell 4, a fan blade 5 is rotatably provided in the shell 4, the shell 4 is provided with an air inlet and an air outlet on the upper and lower sides of the fan blade 5, respectively, and an ash discharge valve is provided at the lower end of the shell 4. The flue gas pre-filter mechanism performs preliminary dust removal on the solid smoke in the smoke entering the vacuum tube 3 from the VD furnace 1, thereby reducing the dust content in the smoke.

[0022] A flue gas cooling mechanism is provided on the vacuum tube 3 at the front end of the flue gas pre-filter mechanism. The flue gas cooling mechanism includes a shell 6 sleeved on the vacuum tube 3. The lower end and upper end of the shell 6 are respectively provided with a water inlet pipe 7 and a water outlet pipe 8. A plurality of heat dissipation fins 9 are provided on the vacuum tube 3 inside the shell 6. The flue gas cooling mechanism is used to reduce the temperature of the flue gas in the vacuum tube 3.

[0023] The end of the vacuum tube 3 is connected to a water ring pump unit 10, which is connected to the vacuum tube 3. The water ring pump is used to evacuate the VD furnace 1 to improve the vacuum degree in the VD furnace 1. At the same time, the dust in the flue gas is taken away by the water circulating in the water ring pump. The water circulating in the water ring pump can reduce the dust content in the flue gas. The water ring pump unit 10 is provided with a delivery pipe 14, and the delivery pipe 14 is connected to the vacuum pump unit 12.

[0024] The flue gas output from the water ring pump unit 10 enters the vacuum pump unit 12. A flue gas post-filtration mechanism is provided at the front end of the vacuum pump unit 12. The flue gas post-filtration mechanism includes a spray dust collector 11. The flue gas post-filtration mechanism filters the flue gas entering the vacuum pump unit 12 to further reduce the dust content in the flue gas. The vacuum pump unit 12 includes multiple steam pumps 13 and multiple vacuum pumps connected in series. The steam pump 13 is connected to the corresponding vacuum pump. The steam pump 13 provides power to the vacuum pump unit 12. The steam generated in the smelting workshop is transported to the steam pump 13 through a steam pipe.

[0025] The specific working process is as follows: cooling water is input into the outer shell 6 from the water inlet pipe 7 to cool the vacuum tube 3, the water ring pump and the steam pump 13 are started, the steam pump 13 drives the vacuum pump, and the water ring pump unit 10 evacuates the VD furnace 1 to improve the vacuum degree in the VD furnace 1. After that, the steam pump 13 is used to drive the vacuum pump unit 12 to further improve the vacuum degree in the VD furnace 1. Part of the steam pump 13 is replaced by part of the water ring pump unit 10, which saves the use of steam and eliminates the need for the smelting workshop to produce additional steam to supply the steam pump 13, saving energy. At the same time, the water ring pump unit 10, the steam pump 13 and the vacuum pump unit 12 work together to improve the vacuum degree in the VD furnace 1, and the refining efficiency is high.

[0026] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An energy-saving and efficient VD refining furnace, characterized by: The invention comprises a VD furnace (1), wherein a vacuum cover (2) is provided at the upper end of the VD furnace (1), the vacuum cover (2) is connected to a vacuum tube (3), a flue gas pre-filtering mechanism is provided in the middle of the vacuum tube (3), a water ring pump unit (10) is connected to the end of the vacuum tube (3), the water ring pump unit (10) is provided with a delivery pipe (14), the delivery pipe (14) is connected to the vacuum pump unit (12), a flue gas post-filtering mechanism is provided at the front end of the vacuum pump unit (12), and the vacuum pump unit (12) comprises a plurality of steam pumps (13) and a plurality of vacuum pumps connected in series, and the steam pumps (13) are connected to corresponding vacuum pumps.

2. The energy-saving and high-efficiency VD refining furnace according to claim 1, characterized in that: A smoke cooling mechanism is provided on the vacuum tube (3) at the front end of the smoke pre-filter mechanism. The smoke cooling mechanism comprises a shell (6) sleeved on the vacuum tube (3). A water inlet pipe (7) and a water outlet pipe (8) are provided at the lower end and the upper end of the shell (6), respectively.

3. The energy-saving and high-efficiency VD refining furnace according to claim 2, characterized in that: A plurality of heat dissipation fins (9) are provided on the vacuum tube (3) inside the housing (6).

4. The energy-saving and high-efficiency VD refining furnace according to claim 1, characterized in that: The smoke pre-filter mechanism comprises a shell (4), a fan blade (5) is rotatably arranged in the shell (4), an air inlet and an air outlet are respectively arranged on the upper and lower sides of the fan blade (5), and an ash discharge valve is arranged at the lower end of the shell (4).

5. The energy-saving and high-efficiency VD refining furnace according to claim 1, characterized in that: The flue gas post-filtration mechanism comprises a spray-type dust collector (11).

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