Furnace end and furnace tail electrode cooling structure of graphitization furnace

Abstract

The utility model discloses a graphitization furnace furnace end and furnace tail electrode cooling structure which comprises an electrode of a furnace end or a furnace tail, cooling water holes used for water cooling in the electrode are formed in the pushing end face of the electrode of the furnace end or the furnace tail respectively, and the cooling water holes are formed in the length direction in the electrode and are of a closed barrel-shaped structure. The top end of the cooling water hole is connected with an electrode contact; and a water inlet and a water outlet are respectively formed in the side part of the electrode and are respectively communicated with the cooling water hole. According to the utility model, the problem of water leakage of the through cooling water hole of the electrode group is completely eradicated, the common imprisonment that the copper pipe is difficult to cool, manufacture and install, inconvenient to maintain and operate and the like is broken, and the device has very important significance in reducing the labor intensity of workers and improving the installation efficiency and production efficiency of a furnace. And the problems of overheating damage of the electrode and the surrounding graphite blocks and the like can be effectively prevented, so that the service life of the furnace can be prolonged, and unnecessary production waste can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a graphite furnace furnace head furnace tail electrode cooling structure belongs to industrial furnace technical field. BACKGROUND

[0002] The production of the graphitization furnace, the furnace head furnace tail electrode mainly has two cooling modes: one is to adopt the outside water cooling direct spray electrode mode, its characteristics are simple and direct, and the cooling effect is general. This mode has certain requirements to the cooling water quality and wastes more water, needs to specially set up the water collecting ditch and the collected waste water also needs to be newly purified, therefore increases the production cost of the graphitization furnace. At the same time, since the spray water mist mixes with the flue gas dust in the workshop, serious environmental pollution is easy to produce and the plant structure is corroded. In addition, in the high-cold area, the spray water mist condenses in the plant roof and forms the ice cone, and personal safety accidents are easy to produce.

[0003] Therefore, more and more graphitization furnace productions have abandoned this electrode cooling mode at present, and mostly adopt another mode - the inside water cooling, that is, the electrode is drilled with a cooling water hole. This mode circulates water cooling, does not need to increase the water treatment investment, also does not have the pollution problem of the outside water cooling, and the cooling effect can basically meet the production requirement. For example, the Chinese patent CN115962659A discloses a graphite furnace furnace head furnace tail electrode cooling water hole structure and its installation method, including the furnace head or furnace tail electrode (8), characterized in that: the water inlet (9) and the water outlet (10) of the electrode inside water cooling are respectively arranged on the two adjacent surfaces of each furnace head or furnace tail electrode (8), and the cooling water channel (1) is arranged in the furnace head or furnace tail electrode (8), the water inlet (9) and the water outlet (10) in the same furnace head or furnace tail electrode (8) are communicated with each other through the cooling water channel (1) in the furnace head or furnace tail electrode (8); the cooling water channel (1) in each furnace head or furnace tail electrode (8) is independently arranged, and is not communicated and interfered with the cooling water channel (1) in other furnace head or furnace tail electrode (8).

[0004] Since the electrode end part of the furnace head and furnace tail is the electrode pushing working area, the inlet and outlet of the cooling water hole are generally arranged at the electrode side part near the pushing end, the whole cooling water hole is in the form of penetrating the electrode section, the cooling is simple and direct, and for small load graphitization furnaces such as single furnace head and furnace tail electrode and double furnace head and furnace tail electrode, the internal water cooling mode is the most economical and applicable. With the continuous improvement of production capacity, the specification of graphitized products is also getting larger and larger, and considering the quality and cost of large specification furnace head and furnace tail electrode, at present, the large load graphitization furnace with 2*2 arrangement of 4 electrodes per group has become a trend. Since there are joints in the two-dimensional direction of the electrode section, the direct hole penetration type cooling water hole will cause leakage and cannot be used. The common existing solution is to pass a copper pipe in the penetrating cooling water hole, so that the cooling water cools the electrode through the copper pipe. However, the copper pipe cooling has the following disadvantages: a. In order to prevent the copper pipe from oxidizing, the copper pipe and the electrode hole must be in interference fit, so the installation of the copper pipe into the electrode is extremely difficult, and generally the construction enterprise does not have the installation capacity, and the machining precision of the copper pipe and the electrode hole cannot meet the installation requirements; b. Generally, the diameter of the copper pipe is only about φ25mm, and due to the interference fit, the diameter of the copper pipe is too small, and due to the limitation of the size of the electrode itself, the copper pipe cannot be arranged too much, and in addition, the cooling water also needs to pass through the inner wall of the copper pipe to cool the electrode, so the cooling effect of the whole electrode is poor, and the electrode and the surrounding graphite block are damaged due to overheating; c. After the graphitization furnace is produced for a period of time, the copper pipe at the joint between each group of electrodes is seriously oxidized, which affects the production of the graphitization furnace.

[0005] More importantly, the penetrating internal cooling water hole which is opened from the electrode side part has two major defects: a. It can only cool in the limited area of the electrode, and cannot effectively cool along the longitudinal direction (length direction) of the electrode, so the cooling effect is greatly reduced; b. The number of copper pipes has a great influence on the cross-sectional area of the electrode, too few copper pipes will not cool enough, and too many copper pipes will correspondingly reduce the cross-sectional area of the electrode, thereby increasing the current density of the electrode and causing the electrode to overheat. Therefore, the quality requirement of the furnace head and furnace tail electrode is relatively high, generally high-power graphite electrode or even super-high-power graphite electrode, which undoubtedly increases the production cost of the graphitization furnace. The above disadvantages have seriously restricted the production of large load graphitization furnaces. SUMMARY

[0006] The purpose of the utility model is to provide a graphitization furnace furnace head and furnace tail electrode cooling structure, which can effectively solve the cooling problem of the large load graphitization furnace head and furnace tail electrode group, avoid the complicated and difficult installation of the cooling copper pipe, improve the electrode cooling efficiency, reduce the damage probability of the electrode graphite block, and prolong the service life of the graphitization furnace while keeping the original internal water cooling electrode cooling mode with low production cost and small pollution.

[0007] The utility model discloses the following technical scheme: A graphite furnace furnace head furnace tail electrode cooling structure, including the electrode of furnace head or furnace tail, from the top pushing end surface of the electrode of furnace head or furnace tail, respectively set up the cooling water hole for the water cooling in electrode, and the cooling water hole is along the length direction of electrode and sets up, and it is closed bucket -shaped structure, the top end of cooling water hole is connected electrode joint, and the water inlet and water outlet are set up in the side of electrode respectively, and the water inlet and water outlet are communicated with cooling water hole respectively.

[0008] Each electrode of furnace head or furnace tail is provided with independent cooling water hole, and the water inlet and water outlet are connected with steel pipe, outer pipe joint and hose interface respectively.

[0009] The diameter of the cooling water hole is 120-250mm.

[0010] The connecting section of the cooling water hole is a threaded taper with large top and small bottom.

[0011] The depth of the cooling water hole is 700-1200mm.

[0012] The entire cooling water hole is arranged in the electrode, and only the water inlet and water outlet are communicated with the outside of the electrode.

[0013] Compared with the prior art, the utility model can completely prevent the water leakage problem of electrode group through the cooling water hole, break the common existence of copper pipe cooling manufacturing and installation difficulties, maintenance operation inconvenience and other problems, and has very important significance for reducing the labor intensity of workers and improving the installation efficiency and production efficiency of the furnace. The utility model also effectively overcomes the problems of electrode and surrounding graphite block overheating damage caused by small cooling copper pipe and insufficient number of cooling copper pipes. At the same time, the large-diameter cooling water hole arranged along the length direction of the electrode greatly increases the effective cooling area of the electrode, which is very beneficial to improve the service life of the furnace and reduce unnecessary production waste. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the large-diameter core cooling water hole structure schematic view of the utility model,

[0015] Figure 2 It is Figure 1 A-A direction sectional view in the utility model.

[0016] The marks in the drawings are: 1-furnace head or furnace tail electrode, 2-cooling water hole, 3-electrode joint, 4-steel pipe, 5-outer pipe joint, 6-hose interface, 7-water inlet, 8-water outlet. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. EMBODIMENT

[0018] A graphite furnace head or tail electrode cooling structure, comprising an electrode 1 of a furnace head or a furnace tail, a cooling water hole 2 for water cooling in the electrode 1 is respectively arranged at a pushing end surface of the electrode 1 of the furnace head or the furnace tail, the cooling water hole 2 is arranged along a length direction of the electrode 1 and has a closed barrel structure, and a top end of the cooling water hole 2 is connected with an electrode joint 3.

[0019] Each of the electrodes 1 of the furnace head or the furnace tail is respectively provided with an independent cooling water hole 2, and a water inlet 7 and a water outlet 8 are respectively connected with a steel pipe 4, an outer pipe joint 5 and a hose interface 6.

[0020] The diameter of the cooling water hole 2 is 120-250 mm.

[0021] A threaded taper with a large upper part and a small lower part is arranged at a connecting section of the cooling water hole 2 and the electrode joint 3.

[0022] The depth of the cooling water hole 2 is 700-800 mm.

[0023] The whole cooling water hole 2 is arranged inside the electrode 1 and is connected with the outside of the electrode 1 only through the water inlet 7 and the water outlet 8.

[0024] In order to ensure the cooling efficiency of the electrode, the water inlet 7 and the water outlet 8 should be spaced apart by a certain distance, and in the embodiment, the water inlet 7 and the water outlet 8 are vertically arranged. The steel pipe 4 inserted in the water inlet 7 and the water outlet 8 is sealed by carbon slurry around the steel pipe 4, and then the outer pipe joint 5 and the hose interface 6 are installed and connected with the external cooling water pipe. After the whole cooling water hole 2 is waterproofed, the threaded surface of the electrode joint 3 is evenly coated with a thin layer of carbon slurry, the electrode joint 3 is smoothly screwed into the pushing end part of the electrode 1 of the furnace head or the furnace tail, the excess part is cut and appropriately polished, so that the electrode joint 3 is flush with the end part of the electrode, then the carbon slurry is used to smear and seal all the joints. Finally, the whole cooling water hole should be subjected to a water pressure test after being processed. Embodiment

[0025] A graphite furnace head or tail electrode cooling structure, comprising an electrode 1 of a furnace head or a furnace tail, a cooling water hole 2 for water cooling in the electrode 1 is respectively arranged at a pushing end surface of the electrode 1 of the furnace head or the furnace tail, the cooling water hole 2 is arranged along a length direction of the electrode 1 and has a closed barrel structure.

[0026] The diameter of the cooling water hole 2 is 200 mm, and the depth of the cooling water hole 2 is 900 mm.

[0027] The whole cooling water hole 2 is arranged inside the electrode 1 and is connected with the outside of the electrode 1 only through the water inlet 7 and the water outlet 8. Embodiment

[0028] The graphite furnace furnace head furnace tail electrode cooling structure, including the electrode 1 of furnace head or furnace tail, from the push end surface of the electrode 1 of furnace head or furnace tail, respectively open the cooling water hole 2 for water cooling in the electrode 1, the cooling water hole 2 is set along the length direction in the electrode 1, and presents the closed barrel-shaped structure.

[0029] Wherein, the diameter of the cooling water hole 2 is 240mm, and the depth is 1100mm.

[0030] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A graphitization furnace head or tail electrode cooling structure, comprising an electrode (1) of a furnace head or tail, characterized in that: From the electrode (1) of the furnace head or the furnace tail push end surface, respectively set up for the water cooling in the electrode (1) cooling water hole (2), cooling water hole (2) along the length direction of electrode (1) setting, present closed bucket shape structure;The top end of the cooling water hole (2) is connected with the electrode connector (3);The water inlet (7) and the water outlet (8) are respectively arranged on the side of the electrode (1), and the water inlet (7) and the water outlet (8) are communicated with the cooling water hole (2) respectively.

2. The graphite furnace end electrode cooling structure of claim 1, wherein: Each electrode (1) of the furnace head or the furnace tail is respectively provided with an independent cooling water hole (2).

3. The graphite furnace end electrode cooling structure of claim 1, wherein: The diameter of the cooling water hole (2) is 120-250 mm.

4. The graphitization furnace end electrode cooling structure of claim 1, wherein: The water inlet (7) and the water outlet (8) are respectively connected with the steel pipe (4), the outer pipe connector (5) and the hose interface (6).

5. The graphitization furnace end electrode cooling structure of claim 1, wherein: The connection section of the cooling water hole (2) and the electrode connector (3) adopts a threaded taper with large top and small bottom.

6. The graphitization furnace end electrode cooling structure of claim 1, wherein: The depth of the cooling water hole (2) is 700-1200 mm.

7. The graphitization furnace end electrode cooling structure of claim 1, wherein: The cooling water hole (2) is arranged in the electrode (1), and only communicates with the outside of the electrode (1) through the water inlet (7) and the water outlet (8).

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