Rapid graphitization furnace cooling device with gas-collecting hood

Abstract

The utility model discloses a graphitization furnace rapid cooling device with a gas-collecting hood, which comprises a cuboid frame, four corners of the upper layer and the lower layer of the frame are respectively and fixedly provided with supporting legs, a lifting mechanism is arranged in the frame, a lifting frame is arranged through the lifting mechanism, and the graphitization furnace rapid cooling device is fixedly arranged at the bottom of the lifting frame. The periphery and the top of the rapid cooling device for the graphitization furnace are coated with soft curtains, the bottoms of the soft curtains are connected with the frame, and one side of each soft curtain is open and used for being connected with an original exhaust pipe of the graphitization furnace. Compared with a conventional stainless steel gas-collecting hood, the aluminum sulfate soft curtain is lower in cost, and part of cost can be saved; the gas collecting hood and rapid cooling are integrated, so that the occupied space can be saved; the cost of equipment such as a grab bucket can be saved by adopting a rapid cooling device; the use frequency of the graphitization furnace, the crucible or the box plate can be increased by adopting the rapid cooling device; the rapid cooling device can shorten the production cycle, improve the productivity of the graphitization furnace and the product quality, and has more considerable benefits.

Description

Technical Field

[0001] The utility model relates to the technical field of graphitization furnace cooling application, in particular to a graphitization furnace rapid cooling device with a gas collecting hood. Background Art

[0002] The existing graphitization furnace must solve two major problems: one is environmental protection, that is, the power transmission and heating process will overflow carbon monoxide, sulfur dioxide, volatile organic compounds (VOCs) and gas phase metals and other atmospheric pollutants. Such pollutants are strictly prohibited from being directly discharged into the atmosphere at high short-term concentrations. Conventional prevention and control measures are to set up independent gas collection hoods on the furnace surface to collect and carry out physical and chemical treatment in a unified manner; the second is rapid cooling. In order to improve the quality of graphite products, the raw and auxiliary materials need to be quickly cooled from 3000℃ to 350℃. The shorter the cooling time, the more conducive it is to reduce the product specific surface area. Conventional processes use grab bucket layered cooling and spray mist water on high-temperature materials for rapid cooling;

[0003] To solve the above problems, the existing graphitization furnace process is as follows:

[0004] Step 1: After the graphitization furnace is loaded, immediately hang the gas collecting hood to the furnace surface;

[0005] Step 2: An opening is provided on one side of the hood to connect with the exhaust pipe. A negative pressure fan is used to maintain a slight negative pressure in the hood to extract relevant volatile organic compounds in time.

[0006] Step 3: After the power is supplied for 10-12 hours, the outlet position can be ignited. The purpose of ignition is to fully burn the volatile organic matter.

[0007] Step 4 After power supply is completed, remove the gas collection hood;

[0008] Step 5: The graphitization furnace is kept still for 2-3 days, and then the upper auxiliary materials of the furnace are cooled in layers using a grab bucket;

[0009] Step 6: Because the material temperature (1200℃) is much higher than the grab bucket's tolerance temperature (800℃), mist water should be used to achieve rapid cooling if necessary;

[0010] Step 7: Repeat this process intermittently until the temperature drops to 350°C and the product is ready for delivery.

[0011] The above process has the following disadvantages:

[0012] 1. The existing graphitization furnace gas hood is independently set. One graphitization furnace needs to be equipped with 3-4 gas hoods in the length direction. The gas hood needs to occupy the workshop space when not in operation.

[0013] Second, the gas hood is generally made of 3mm thick steel plate. A gas hood weighs about 3 tons, and frequent lifting poses a safety hazard;

[0014] 3. When grabbing high-temperature materials, there is a lot of dust and high thermal radiation from the materials, which results in a bad working environment;

[0015] Fourth, the grab bucket is used for layered furnace discharge. The grab bucket’s tolerance temperature must be ≤800℃. The material temperature reaches 1200℃, which seriously affects the grab bucket’s service life.

[0016] 5. Grab buckets are used to discharge the materials in layers. Every 2-3 buckets of high-temperature materials must be forced to cool with water, which cannot work continuously, resulting in a longer discharge cycle.

[0017] 6. Use grab bucket for layered cooling. Too long cooling time will lead to oxidation of graphite products on the crucible or box plate, resulting in an increase in product specific surface area and reduced product quality.

[0018] 7. Use grab bucket for layered cooling. The graphitization furnace, crucible or box plate are easily oxidized when exposed to air in a high temperature environment, which shortens the service life of the crucible or box plate.

[0019] 8. Use grab bucket to remove materials in layers. The grabbed materials must be transferred to the transfer silo, which needs to occupy space;

[0020] 9. Use grab bucket to take out the food in layers, it is impossible to take it out all at once. Utility Model Content

[0021] Aiming at the deficiencies of the existing graphitization furnace environmental protection and layered cooling furnace process, the utility model designs a graphitization furnace rapid cooling device with a gas collecting hood, which integrates a high temperature resistant aluminum sulfate soft curtain with the rapid cooling device into a whole.

[0022] The utility model adopts the following technical solutions:

[0023] A rapid cooling device for a graphitization furnace with an air collecting hood comprises a rectangular frame, legs are fixedly installed at the four corners of the upper and lower layers of the frame, a lifting mechanism is installed in the frame, a lifting frame is installed through the lifting mechanism, the rapid cooling device for the graphitization furnace is fixedly installed at the bottom of the lifting frame, the four sides and the top of the rapid cooling device for the graphitization furnace are covered with soft curtains, the bottom of the soft curtains is connected to the frame, one side of the soft curtains is open for connecting to the original exhaust pipe of the graphitization furnace, and the rapid cooling device for the graphitization furnace comprises a water tank and a heat exchange element.

[0024] Preferably, the lifting mechanism includes a load-bearing screw and a synchronous motor. The load-bearing screw is fixedly connected between the upper and lower layers of the frame, and the synchronous motor is fixedly connected to the lifting frame. The output end of the synchronous motor is threadedly connected to the load-bearing screw. Driven by the synchronous motor, the lifting frame rises and falls along the load-bearing screw.

[0025] Preferably, the heat exchange element is a tubular heat exchange element.

[0026] Preferably, the soft curtain is an aluminum sulfate soft curtain.

[0027] Preferably, the soft curtain is connected to the frame via a chain.

[0028] Preferably, the frame is a steel frame.

[0029] Preferably, the end surface of the soft curtain is provided with an observation port.

[0030] Preferably, the exhaust pipe is connected to a negative pressure fan.

[0031] The utility model discloses a graphitization furnace rapid cooling device with a gas collecting hood, wherein the steel frame is embedded with four supporting legs, and a synchronous motor is connected to control the lifting of the steel frame through a load-bearing screw rod; firstly, the lifting mechanism is lifted to the highest limit on the ground; the whole rapid cooling device is surrounded and connected on all sides and the top with an aluminum sulfate soft curtain; after the furnace is loaded, the graphitization furnace rapid cooling device with a gas collecting hood is hoisted to the furnace surface by a traveling crane and aligned and positioned; an opening is provided on one side of the aluminum sulfate soft curtain, which is connected to the original exhaust pipe of the furnace, and an observation port is provided on the end face of the soft curtain; the fan is turned on to maintain a slight negative pressure in the internal space of the aluminum sulfate soft curtain for exhaust; after the furnace is powered on, the rapid cooling device can be started without removing the aluminum sulfate soft curtain; until the material temperature drops to 350°C, the graphitization furnace rapid cooling device with a gas collecting hood is hoisted to the ground, and a suction overhead crane is used to complete the one-time furnace discharge; the aforementioned steps are repeated, and the graphitization furnace rapid cooling device with a gas collecting hood continues to work on the next furnace.

[0032] The beneficial effects of the utility model are as follows: (1) there is no need to set up a separate gas collecting hood, which can save workshop space; (2) the use of high-temperature resistant aluminum sulfate soft curtain can meet the original gas collecting hood function and can be lightweight; (3) the rapid cooling device of the graphitization furnace with a gas collecting hood can save the grab bucket and transfer silo, which can save the corresponding equipment investment and site space; (4) the rapid cooling device of the graphitization furnace with a gas collecting hood can achieve one-time discharge of auxiliary materials, which is beneficial to improve the production capacity of the graphitization furnace and reduce the production cycle; (5) the rapid cooling device of the graphitization furnace with a gas collecting hood can effectively improve product quality; (6) the rapid cooling device of the graphitization furnace with a gas collecting hood can effectively increase the service life of the graphitization furnace, crucible or box plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a stereogram of the utility model;

[0034] Figure 2 yes Figure 1 A main view of

[0035] Figure 3 It is a stereogram of the utility model in use;

[0036] Figure 4 yes Figure 3A main view of

[0037] In the figure: 1. Steel frame, 2. Outriggers, 3. Synchronous motor, 4. Load-bearing screw, 5. Lifting frame, 6. Graphitization furnace rapid cooling device, 7. Aluminum sulfate soft curtain. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0039] Example: Figure 1-Figure 4 As shown, a rapid cooling device for a graphitization furnace with a gas collecting hood comprises a steel frame 1, legs 2, a lifting mechanism, a lifting frame 5, a rapid cooling device for a graphitization furnace 6 and an aluminum sulfate soft curtain 7. The lifting mechanism comprises a synchronous motor 3 and a load-bearing screw 4, and the rapid cooling device for a graphitization furnace comprises a water tank and a tubular heat exchange element.

[0040] The size of a crucible furnace or box furnace in a certain application scenario is 33000mm (length) × 4000mm (width). According to the application scenario, the size of the graphitization furnace rapid cooling device with a gas collecting hood is customized to be 5500mm (length) × 4000mm (width), that is, 6 such devices can be placed end to end on a furnace at the same time.

[0041] The total height of the lifting mechanism of the graphitization furnace rapid cooling device with a gas collecting hood raised to the maximum limit is 2200mm, of which the height of the tubular heat exchange element is 1050mm and the height of the water tank is 1000mm. In this way, the bottom of the tubular heat exchange element has a safety distance of about 150mm from the ground.

[0042] Use aluminum sulfate soft curtains on the ground to connect and enclose the four sides and the top of the rapid cooling device. Note that observation ports must be set at the ends of the aluminum sulfate soft curtains and exhaust ports must be set on the sides.

[0043] A positioning plate is pre-arranged on the side wall of the furnace so that each leg of the rapid cooling device of the graphitization furnace with a gas collecting hood can be accurately pressed onto the positioning plate, and the positioning allowable deviation is ≤5mm.

[0044] Connect the exhaust port of the aluminum sulfate soft curtain to the exhaust pipe on the side wall of the furnace, and turn on the negative pressure fan for exhaust while supplying power.

[0045] Supply electricity for 10-12 hours, ignite the gas outlet and fully burn the volatile organic compounds.

[0046] After the power supply is completed, the rapid cooling device is started, and the bottom end of the tubular heat exchange element is stopped 100 mm away from the top of the crucible or the box plate by lowering the lifting frame, entering the rapid cooling mode.

[0047] As the lifting frame descends, the aluminum sulfate soft curtain descends together. The chain connecting the aluminum sulfate soft curtain and the steel frame will pull the soft curtain upward, always keeping the soft curtain closed around the entire device to prevent dust and pollutants from escaping.

[0048] Due to the rapid cooling device, the upper part of the entire graphitization furnace is free of human or mechanical disturbance and the temperature is reduced from 3000°C to 350°C.

[0049] Finally, a suction overhead crane is used to take the materials out of the furnace at a temperature of ≤350℃ in one go, and the entire furnace-taking process is pollution-free.

[0050] The utility model adopts aluminum sulfate soft curtain, which has lower cost than the conventional stainless steel gas collecting hood, and can save part of the cost; the gas collecting hood and the rapid cooling are integrated into one, which can save the site occupation; the rapid cooling device can save the cost of equipment such as grab buckets; the rapid cooling device can increase the number of times the graphitization furnace, crucible or box plate is used; the rapid cooling device can shorten the production cycle, improve the production capacity of the graphitization furnace and the product quality, and its benefits are more considerable.

[0051] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A rapid cooling device for a graphitization furnace with a gas collecting hood, comprising a rectangular parallelepiped frame, with legs fixedly mounted at the four corners of the upper and lower layers of the frame, characterized in that: A lifting mechanism is installed in the frame, a lifting frame is installed through the lifting mechanism, a graphitization furnace rapid cooling device is fixedly installed at the bottom of the lifting frame, the four sides and the top of the graphitization furnace rapid cooling device are covered with soft curtains, the bottom of the soft curtain is connected to the frame, one side of the soft curtain is open for connecting to the original exhaust pipe of the graphitization furnace, and the graphitization furnace rapid cooling device includes a water tank and a heat exchange element.

2. The rapid cooling device for a graphitization furnace with a gas collecting hood according to claim 1 is characterized in that: The lifting mechanism includes a load-bearing screw and a synchronous motor. The load-bearing screw is fixedly connected between the upper and lower layers of the frame. The synchronous motor is fixedly connected to the lifting frame. The output end of the synchronous motor is threadedly connected to the load-bearing screw. Driven by the synchronous motor, the lifting frame rises and falls along the load-bearing screw.

3. The rapid cooling device for a graphitization furnace with a gas collecting hood according to claim 1 is characterized in that: The heat exchange element is a tubular heat exchange element.

4. The rapid cooling device for a graphitization furnace with a gas collecting hood according to claim 1 is characterized in that: The soft curtain is an aluminum sulfate soft curtain.

5. The rapid cooling device for a graphitization furnace with a gas collecting hood according to claim 1 is characterized in that: The soft curtain is connected to the frame through a chain.

6. The rapid cooling device for a graphitization furnace with a gas collecting hood according to claim 1 is characterized in that: The frame is a steel frame.

7. The rapid cooling device for a graphitization furnace with a gas collecting hood according to claim 1 is characterized in that: The end surface of the soft curtain is provided with an observation port.

8. The rapid cooling device for a graphitization furnace with a gas collecting hood according to claim 1 is characterized in that: The exhaust pipe is connected with a negative pressure fan.

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