Waste gas and oil smoke filtering device for vacuum melting furnace

Abstract

The utility model relates to the technical field of metal smelting auxiliary equipment, in particular to a vacuum smelting furnace waste gas and oil smoke filtering device which comprises an electric dust remover, a cooling dust removal chamber and a gas filtering water tank. An inlet of the electric dust collector is communicated with a waste gas outlet of the vacuum melting furnace through a pipeline, and the electric dust collector removes most dust pollutants. An outlet of the electric dust remover is communicated with a flue gas inlet of the cooling dust removal chamber; a cooling dust removal chamber flue gas outlet is communicated with a flue gas inlet of a gas filtering water tank, and purified flue gas is discharged from a flue gas outlet of the gas filtering water tank. The waste gas and oil smoke filtering device of the vacuum melting furnace is provided with the cooling dust removal chamber and the gas filtering water tank, metal simple substances and acid gas volatilized in smoke can be removed, and the filtering effect on the waste gas and oil smoke of the vacuum melting furnace is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal smelting auxiliary equipment, in particular to a vacuum smelting furnace exhaust gas oil fume filtering device. Background Art

[0002] Vacuum smelting uses vacuum to maintain the vacuum environment in the metal smelting furnace, which is conducive to reducing impurities and improving quality. The exhaust gas fumes extracted from the vacuum smelting furnace contain metal particles and volatile impurities, which cannot be directly emptied and need to be filtered first. The current filtering device generally uses filter materials to adsorb particles, such as patent document CN218358130U-A vacuum smelting furnace exhaust gas filtering device for target materials.

[0003] This type of filtration method can effectively filter particulate matter, but is not effective in removing volatile impurities. Utility Model Content

[0004] The main purpose of the utility model is to provide a vacuum smelting furnace exhaust gas oil fume filtering device to improve the vacuum smelting furnace exhaust gas oil fume filtering effect.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a vacuum melting furnace exhaust gas oil fume filtering device is provided, comprising:

[0006] an electric dust collector, the inlet of which is connected to the exhaust gas outlet of the vacuum melting furnace;

[0007] A cooling and dust removal chamber, the smoke inlet of which is connected to the outlet of the electric dust collector, a filter material is fixed on one side of the chamber, and a cooling pipe grid capable of circulating external air is arranged on the other side;

[0008] An air filter water tank is arranged at one side of the cooling and dust removal chamber, and a smoke outlet of the cooling and dust removal chamber is connected to the air filter water tank through a pipeline.

[0009] The electric dust collector removes most of the dust pollutants. The outlet of the electric dust collector is connected to the flue gas inlet of the cooling dust removal chamber; the flue gas outlet of the cooling dust removal chamber is connected to the flue gas inlet of the air filter water tank, and the purified flue gas is discharged from the flue gas outlet of the air filter water tank. In the cooling dust removal chamber, the metal element volatilized during the alloy smelting process is mainly removed, and the acid gas in the flue gas is absorbed in the air filter water tank.

[0010] As a further improvement, the cooling and dust removal chamber includes at least two cooling and dust removal units, each of which is connected to the electric dust collector and the air filter water tank through a pipeline and can independently complete the cooling and dust removal operation.

[0011] As a further improvement, the cooling and dust removal unit includes a cooling chamber and a dust removal chamber, the upper parts of the cooling chamber and the dust removal chamber are isolated from each other; the lower parts of the cooling chamber and the dust removal chamber are connected.

[0012] As a further improvement, the cooling tube grid is installed in the cooling chamber, and the cooling tube grid is composed of no less than three serpentine tubes connected in parallel.

[0013] As a further improvement, the inlet and outlet of the cooling tube grid are in communication with the outside air.

[0014] As a further improvement, the serpentine tube is a metal tube, and a ceramic layer is sprayed on the outer wall of the metal tube.

[0015] As a further improvement, the air filter water tank has an air inlet pipe and an air outlet pipe, and the air inlet pipe extends into the air filter water tank and is close to the bottom of the air filter water tank.

[0016] As a further improvement, the air filter water box has a liquid inlet and a liquid outlet, the pipeline connected to the liquid outlet has a branch connected to the upper part of the cooling chamber, and the lower part of the cooling chamber is provided with a cooling chamber liquid outlet.

[0017] The application of the technical solution of the utility model has the following technical effects:

[0018] The vacuum smelting furnace exhaust gas oil fume filtering device provided by the utility model is provided with a cooling dust removal chamber and an air filtering water tank, which can remove volatile metal elements and acid gases in the fume and improve the filtering effect of the vacuum smelting furnace exhaust gas oil fume. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 The overall layout diagram of the waste gas and oil fume filtering device of the vacuum smelting furnace according to the utility model is shown;

[0021] Figure 2 A three-dimensional view of the cooling and dust removal chamber of the utility model is shown;

[0022] Figure 3 The front view of the cooling and dust removal chamber of the utility model is shown;

[0023] Figure 4 Shows Figure 1 AA section view in;

[0024] Figure 5 Shows Figure 1 BB section view in;

[0025] Figure 6 The three-dimensional view of the cooling and dust removal chamber of the utility model shows the structure of the cooling pipe grid after a part of the shell is removed.

[0026] The above drawings include the following reference numerals:

[0027] 1. Electric dust collector;

[0028] 2. Cooling and dust removal chamber;

[0029] 21. Cooling and dust removal chamber flue gas inlet;

[0030] 22. Smoke outlet of warm dust removal chamber;

[0031] 3. Air filter water tank;

[0032] 31. Smoke inlet of air filter water tank;

[0033] 32. Smoke outlet of air filter water tank;

[0034] 33. With air filter water tank inlet;

[0035] 34. Liquid outlet of air filter water tank;

[0036] 4. Cooling and dust removal unit;

[0037] 41. Cooling chamber;

[0038] 42. Dust removal chamber;

[0039] 43. Communication port;

[0040] 44. Replaceable filter element unit;

[0041] 45. Liquid inlet of cooling chamber;

[0042] 46. ​​Sprinkler head;

[0043] 47. Liquid outlet of cooling chamber;

[0044] 5. Cooling tube grid;

[0045] 51. Serpentine tube;

[0046] 52. Cooling grid inlet;

[0047] 53. Cooling pipe grid outlet. DETAILED DESCRIPTION

[0048] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] like Figure 1As shown, the exhaust gas oil fume filtering device of the vacuum smelting furnace includes an electric dust collector 1, a cooling dust removal chamber 2, and a filter water tank 3. The inlet of the electric dust collector 1 is connected to the exhaust gas outlet of the vacuum smelting furnace through a pipeline, and the electric dust collector 1 removes most of the dust pollutants. The outlet of the electric dust collector is connected to the flue gas inlet 21 of the cooling dust removal chamber; the flue gas outlet 22 of the cooling dust removal chamber is connected to the flue gas inlet 31 of the filter water tank, and the purified flue gas is discharged from the flue gas outlet 32 ​​of the filter water tank. In the cooling dust removal chamber 2, the metal elements volatilized during the alloy smelting process, such as lead and zinc, are mainly removed. In the filter water tank 3, the acidic gases in the flue gas, such as hydrogen chloride and sulfur dioxide, are absorbed. The flue gas pipelines between the electric dust collector 1, the cooling dust removal chamber 2, and the filter water tank 3 are connected to transfer the flue gas, and a suitable fan is set to provide the required pressure.

[0050] The electric dust collector 1 can be purchased externally. The structure of the cooling and dust removal chamber 2 is further described below.

[0051] like Figure 2-6 As shown, in this embodiment, the cooling and dust removal chamber 2 includes three parallel cooling and dust removal units 4, each of which can operate independently to complete the cooling and dust removal operation. The cooling and dust removal unit 4 includes a cooling chamber 41 and a dust removal chamber 42. The upper parts of the cooling chamber 41 and the dust removal chamber are isolated from each other by a chamber wall, and the lower parts of the cooling chamber 41 and the dust removal chamber 42 are connected.

[0052] The upper portion of the cooling chamber 41 has a gas inlet, which can be used as the cooling dust removal chamber flue gas inlet 21 after a valve is set. A connecting port 43 is provided on the cavity wall shared by the lower portion of the cooling chamber 41 and the dust removal chamber 42, so that the cooling chamber 41 is connected to the dust removal chamber 42 at the lower portion, and the cooled flue gas can enter the dust removal chamber 42 from the cooling chamber 41.

[0053] A cooling tube grid 5 is installed inside the cooling chamber 41. The cooling tube grid 5 is formed by connecting a plurality of serpentine tubes 51 in parallel. The lower part of the cooling tube grid 5 has a cooling tube grid inlet 52 and a cooling tube grid outlet 53. The medium flowing through the cooling tube grid 5 can be water or air.

[0054] A replaceable filter element unit 44 is installed in the dust removal chamber 42. The replaceable filter element unit 44 is installed on a frame provided in the dust removal chamber 42. An opening is provided above the dust removal chamber 42. By opening the opening, a replaceable filter element unit 44 can be lifted up for replacement. The filter material of the replaceable filter element unit 44 can be activated carbon, which adsorbs and cools the metal element that fixes the particles. The upper part of the dust removal chamber 42 has a smoke outlet, which serves as the warm dust removal chamber smoke outlet 22.

[0055] The structure of the air filter water tank 3 is a cylindrical or square water tank, having a air filter water tank smoke inlet 31 and an air filter water tank smoke outlet 32. The pipeline connected to the air filter water tank smoke inlet 31 extends downward to a position close to the bottom wall of the air filter water tank. The air filter water tank smoke outlet 32 ​​is opened at the top. The air filter water tank 3 also has an air filter water tank water inlet 33 and an air filter water tank liquid outlet 34. The acidic gas generated in the smelting furnace can be absorbed by water. The air filter water tank liquid outlet 34 is processed, mainly to process the acidity of the liquid.

[0056] As a further improvement, a branch is led out at the liquid outlet 34 of the air filter water tank, and the branch enters the cooling chamber 41 from the top of the cooling chamber 41, so as to flush the cooling tube grid 5 of the cooling chamber 41. This is because when the cooling tube grid 5 cools the flue gas, the gaseous metal elements will partially adhere to the cooling tube grid 5. Excessive accumulation will cause the cooling tube grid 5 to be overstressed and cause the risk of failure. When cleaning is required, the cooling and dust removal unit 4 is set to a stop working state, and is cleaned with acidic water led out from the air filter water tank 3, which is conducive to removing the metal elements from the cooling tube grid 5. After cleaning with acidic water, it is necessary to clean it with clean water in time, and then start working and dry it with hot gas.

[0057] In terms of specific structure, a cooling chamber liquid inlet 45 is fixed on the top of the cooling chamber 41, and a spray head 46 is fixedly connected to the cooling chamber liquid inlet. A cooling chamber liquid outlet 47 is fixed on the bottom, and the liquid coming out is separately processed to treat the acidity and metal ions of the liquid. In this way, the acidic waste liquid containing metal ions can be processed in a centralized manner, reducing the processing amount of the metal ion waste liquid. A ceramic layer can be sprayed on the cooling pipe grid and the inner wall of the cooling chamber to prevent the erosion of the acidic liquid.

[0058] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vacuum smelting furnace exhaust fume filtering device, characterized in that: include: an electric dust collector, the inlet of which is connected to the exhaust gas outlet of the vacuum melting furnace; A cooling and dust removal chamber, the smoke inlet of which is connected to the outlet of the electric dust collector, a filter material is fixed on one side of the chamber, and a cooling pipe grid capable of circulating external air is arranged on the other side; An air filter water tank is arranged at one side of the cooling and dust removal chamber, and a smoke outlet of the cooling and dust removal chamber is connected to the air filter water tank through a pipeline.

2. The vacuum melting furnace exhaust fume filtering device according to claim 1, characterized in that: The cooling and dust removal chamber includes at least two cooling and dust removal units, each of which is connected to the electric dust collector and the air filter water tank through a pipeline and can independently complete the cooling and dust removal operation.

3. The vacuum melting furnace exhaust fume filtering device according to claim 2, characterized in that: The cooling and dust removal unit comprises a cooling chamber and a dust removal chamber. The upper parts of the cooling chamber and the dust removal chamber are isolated from each other; the lower parts of the cooling chamber and the dust removal chamber are connected.

4. The vacuum melting furnace exhaust fume filtering device according to claim 3, characterized in that: The cooling tube grid is installed in the cooling chamber, and the cooling tube grid is composed of no less than three serpentine tubes connected in parallel.

5. The vacuum melting furnace exhaust fume filtering device according to claim 4, characterized in that: The inlet and outlet of the cooling tube grid are in communication with the external air.

6. The vacuum melting furnace exhaust fume filtering device according to claim 4, characterized in that: The serpentine tube is a metal tube, and a ceramic layer is sprayed on the outer wall of the metal tube.

7. The vacuum melting furnace exhaust fume filtering device according to claim 3, characterized in that: The air filter water box is provided with an air inlet pipe and an air outlet pipe, wherein the air inlet pipe extends into the air filter water box and is close to the bottom of the air filter water box.

8. The vacuum melting furnace exhaust fume filtering device according to claim 7, characterized in that: The air filter water box has a liquid inlet and a liquid outlet. The pipeline connected to the liquid outlet has a branch connected to the upper part of the cooling chamber. The lower part of the cooling chamber is provided with a cooling chamber liquid outlet.

9. The vacuum melting furnace exhaust fume filtering device according to claim 8, characterized in that: The air filtering water tank has a liquid inlet with a spray head fixedly arranged thereon.

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