Efficient low-energy-consumption roasting pretreatment system for waste oil refining hydrogenation catalyst

Abstract

The utility model relates to the technical field of waste hydrogenation catalyst treatment, in particular to a high-efficiency low-energy-consumption roasting pretreatment system for a waste oil refining hydrogenation catalyst. The air blower is arranged on the vertical roasting furnace; the air pipe group is arranged on the vertical roasting furnace and is connected with the air blower; and the negative pressure collection group is arranged on the vertical roasting furnace. By means of an assembly composed of a vertical roasting furnace, an air blower, an air pipe set, a negative pressure collecting set and a premixing set, a set of efficient and low-energy-consumption roasting pretreatment system is provided for waste oil refining hydrogenation catalyst treatment, and by means of the optimal design of the material pretreatment mode and the roasting device, the waste oil refining hydrogenation catalyst treatment efficiency is improved. The pre-mixing group capable of performing wet-type dipping and uniform mixing is matched with the air blower, the air pipe group and the negative pressure collecting group for operation, so that the catalyst does not need to be subjected to pre-crushing treatment; sulfur and carbon in the catalyst are used for self-setting-off heat release roasting, fuel does not need to be added, the leaching rate of the next-step leaching recovery process is increased, and the separation difficulty of rare metal is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste hydrogenation catalyst treatment, in particular to a high-efficiency and low-energy consumption roasting pretreatment system for waste oil refining hydrogenation catalyst. Background Art

[0002] The disposal and utilization technologies of spent hydrogenation catalysts at home and abroad mainly include landfill, use as raw material for cement production and resource recycling;

[0003] Landfill treatment: This method is simple and easy to operate, but the waste hydrogenation catalyst from oil refining may contain many toxic and harmful components;

[0004] Cement raw materials: Cement is mainly composed of sand and minerals, mainly containing silicon, aluminum, and calcium oxides, while the waste hydrogenation catalyst contains a large amount of aluminum oxide. The waste hydrogenation catalyst can be used as a cement raw material after necessary treatment, and after high-temperature roasting, a multi-component inorganic composite is formed, which is not easy to decompose, and will not precipitate toxic substances. It is basically non-toxic and does not cause environmental pollution. However, the utilization value of the waste hydrogenation catalyst in this method is low;

[0005] Resource recycling and utilization: The main components of waste catalysts are Al2O3, cobalt, molybdenum, tungsten, nickel sulfides and a small amount of oxides. The current resource utilization processes mainly include wet method, pyrolysis and combined pyrolysis + wet method. The waste hydrogenation catalysts are fully utilized. This method can not only achieve efficient recovery of rare and precious metals, but also reduce the impact of waste hydrogenation catalysts on the environment.

[0006] At present, the traditional sodium roasting process requires the catalyst to be crushed in advance before mixing with sodium carbonate or sodium hydroxide. Because there are flammable components such as S and C in the waste catalyst, the crushing process is prone to overheating and spontaneous combustion, which is dangerous and difficult to operate; if it is not crushed, it will cause uneven mixing with auxiliary reagents, incomplete roasting, and reduced leaching rate. At the same time, the traditional roasting process uses equipment such as rotary kilns or reverberatory furnaces, which occupy a large area, have complex flue gas collection, and consume energy to provide combustion heat. Therefore, the development of an efficient and low-energy roasting pretreatment system is the key to achieving efficient recovery of valuable metals.

[0007] The conventional method of mixing materials and auxiliary materials before roasting is: crushing the catalyst and mixing it with sodium carbonate or mixing it with sodium carbonate and crushing it into powder and mixing it. This method has certain risks because the catalyst itself contains carbon deposits and sulfur. Molybdenum and cobalt or nickel actually exist in the form of sulfides, which have the risk of spontaneous combustion. The crushing process is carried out by the collision between the material and the abrasive, which can easily ignite the material. At the same time, the larger the particle size of the material, the higher the activity and the increased risk of spontaneous combustion. In addition, pre-crushing and mixing increase production costs. The mixed materials will sinter into blocks after roasting and need to be crushed before the wet process can be carried out, resulting in complicated processes and low efficiency.

[0008] Therefore, a high-efficiency and low-energy consumption roasting pretreatment system for waste oil refining hydrogenation catalysts is proposed to provide a high-efficiency and low-energy consumption roasting pretreatment system for waste oil refining hydrogenation catalysts. The system utilizes the spontaneous combustion and exothermic roasting in the catalyst without adding fuel, which not only improves the leaching rate of the next leaching and recovery process, but also reduces the difficulty of rare metal separation. Utility Model Content

[0009] In view of the problems in the prior art, the utility model provides a high-efficiency and low-energy consumption roasting pretreatment system for waste oil refining hydrogenation catalysts to treat waste oil refining hydrogenation catalysts. It uses the spontaneous combustion and exothermic roasting in the catalyst without adding fuel, which not only improves the leaching rate of the next leaching and recovery process, but also reduces the difficulty of rare metal separation.

[0010] The technical solution adopted by the utility model to solve the technical problem is a high-efficiency and low-energy consumption calcination pretreatment system for waste oil refining hydrogenation catalyst, including:

[0011] Vertical roasting furnace;

[0012] A blower is installed on the vertical roasting furnace;

[0013] The air duct group is arranged on the vertical roasting furnace and connected to the blower;

[0014] A negative pressure collection group is arranged on the vertical roasting furnace;

[0015] The premixing group is arranged on the vertical roasting furnace.

[0016] By adopting the above technical solution, a high-efficiency and low-energy consumption roasting pretreatment system is provided for the treatment of waste oil refining hydrogenation catalysts through components consisting of a vertical roasting furnace, a blower, an air duct group, a negative pressure collection group and a premixing group.

[0017] Specifically, the air duct group includes:

[0018] The round tube is fixed to the bottom of the vertical roasting furnace;

[0019] At least one set of transverse tubes is provided and arranged at equal distances along the circular tube;

[0020] At least one set of vertical pipes is provided and arranged at equal distances along the top of the horizontal pipe;

[0021] At least one group of exhaust holes are provided and are opened at equal distances along the circumference of the vertical pipe.

[0022] By adopting the above technical solution, optimizing the design of the blowing components in the furnace, and laying the air duct group at the bottom of the furnace, during the combustion of the material, the air is evenly dispersed from the bottom and filled into the burning material in the vertical roasting furnace, so that the combustion is complete.

[0023] Specifically, the blower is arranged at the bottom of the vertical roasting furnace, and the exhaust end of the blower is connected to the air inlet end of the circular tube, the circular tube, the horizontal tube and the vertical tube are connected, and the top of the vertical tube is closed.

[0024] By adopting the above technical scheme, after the mixed waste oil refining hydrogenation catalyst enters the vertical calciner, it is roasted by blasting using the heat released by the spontaneous combustion of sulfur and carbon in the catalyst without the need for fuel energy consumption; the rare metal components in the catalyst are converted into soluble sodium salts.

[0025] Specifically, the negative pressure collection group includes:

[0026] The exhaust interface is arranged at the top of the vertical roasting furnace;

[0027] The exhaust fan is connected to the exhaust interface through a pipeline.

[0028] By adopting the above technical solution and cooperating with the vertical roasting effect of the vertical roasting furnace, the exhaust gas generated by combustion can be collected by the negative pressure collection group set on the top of the furnace. This is simple and fast, and there is no need to design a smoke collection chamber. It solves the problem of collecting harmful gas components such as dust and high-concentration sulfur dioxide in the roasting exhaust gas, and achieves standard emission of roasting exhaust gas.

[0029] Specifically, the premix group includes:

[0030] A premixing tank is arranged on the vertical roasting furnace;

[0031] Catalyst inlet, set on the premixing tank;

[0032] The sodium carbonate auxiliary material inlet is set on the premixing tank;

[0033] A water inlet is provided on the premixing tank;

[0034] An observation window is provided on the premixing tank;

[0035] A stirring rod, arranged on the premixing tank;

[0036] The motor is arranged on the premixing tank and connected with the stirring rod.

[0037] By adopting the above technical solution, the complete premixed catalyst and the auxiliary material sodium carbonate are first mixed so that the sodium carbonate is evenly distributed around the catalyst particles, and then the required amount of water is added and continued to mix so that the sodium carbonate is completely dissolved. After no obvious white sodium carbonate powder is visually observed through the observation window, the sodium carbonate is dissolved in the water and immersed in the catalyst to contact the substance to be reacted.

[0038] Specifically, a material pump is installed outside the vertical roasting furnace, the feed end of the material pump is connected to the premixing tank, the discharge end of the material pump is connected to the vertical roasting furnace, and one-way valves are provided on the material pump, catalyst inlet, sodium carbonate auxiliary material inlet and water inlet.

[0039] By adopting the above technical solution, the mixed materials in the premixing group are sent to the vertical roasting furnace for combustion through the material pump. After roasting, carbon deposits, sulfur and other substances that may cause spontaneous combustion disappear.

[0040] The beneficial effects of the utility model are as follows: through the components consisting of a vertical roasting furnace, a blower, an air duct group, a negative pressure collection group and a premixing group, a high-efficiency and low-energy consumption roasting pretreatment system is provided for the treatment of waste oil refining hydrogenation catalysts; through the optimized design of the material pretreatment method and the roasting device, a premixing group capable of wet impregnation and mixing is adopted in coordination with the blower, the air duct group and the negative pressure collection group, and there is no need to pre-crush the catalyst; the spontaneous combustion and heat release of sulfur and carbon in the catalyst are utilized for roasting without adding fuel, which not only improves the leaching rate of the next leaching and recovery process and reduces the difficulty of separating rare metals, but also the spontaneous combustion and heat release of carbon by the catalyst sulfur is neutralized, and the sodium roasting is completed by blast combustion, which solves the problem of the risk of spontaneous combustion due to crushing required for traditional pretreatment and the problem of high energy consumption and high carbon emissions, and solves the problem of crushing pretreatment and uneven mixing required for traditional roasting, meets the needs of continuous production, and reduces the difficulty and cost of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0042] Figure 1 It is an overall schematic diagram of the utility model;

[0043] Figure 2 This is a schematic diagram of the air duct assembly of the utility model;

[0044] Figure 3 It is a schematic diagram of the stirring rod of the utility model;

[0045] Figure 4 For the utility model Figure 1 Enlarged schematic diagram at point A in the middle.

[0046] In the figure: 1. vertical roasting furnace; 2. blower; 3. air duct group; 301. round pipe; 302. horizontal pipe; 303. vertical pipe; 304. exhaust hole; 4. exhaust interface; 5. exhaust fan; 6. premixing group; 601. premixing tank; 602. catalyst inlet; 603. sodium carbonate auxiliary material inlet; 604. water inlet; 605. observation window; 606. motor; 607. stirring rod; 608. material pump. DETAILED DESCRIPTION

[0047] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0048] To reduce energy consumption, Figure 1-4 As shown, the high-efficiency and low-energy consumption calcination pretreatment system for waste oil refining hydrogenation catalyst described in the utility model comprises:

[0049] Vertical roasting furnace 1;

[0050] A blower 2 is provided on the vertical roasting furnace 1;

[0051] The air duct group 3 is arranged on the vertical roasting furnace 1 and connected to the blower 2;

[0052] A negative pressure collection group is arranged on the vertical roasting furnace 1;

[0053] The premixing group 6 is arranged on the vertical roasting furnace 1 .

[0054] When in use, by optimizing the design of the material pretreatment method and the roasting device, a premixing group 6 capable of wet impregnation and mixing is used in coordination with the blower 2, the air duct group 3 and the negative pressure collection group, and there is no need to pre-crush the catalyst; the spontaneous combustion and heat release of the catalyst is utilized for roasting without adding fuel, which not only improves the leaching rate of the next leaching and recovery process and reduces the difficulty of separating rare metals, but also completes the sodium roasting through the spontaneous combustion and heat release of the catalyst and the blast combustion.

[0055] In order to improve the completeness of combustion, illustratively, the utility model further includes that the air duct group 3 includes:

[0056] The round tube 301 is fixed to the bottom of the vertical roasting furnace 1;

[0057] At least one group of transverse tubes 302 is provided and arranged at equal distances along the circular tube 301;

[0058] At least one set of vertical pipes 303 is provided and arranged at equal distances along the top of the horizontal pipe 302;

[0059] At least one group of exhaust holes 304 are provided and are opened at equal distances along the circumference of the vertical pipe 303 .

[0060] When in use, the air entering the circular tube 301 is discharged into the vertical roasting furnace 1 in a highly dispersed manner through the arrangement of multiple groups of horizontal tubes 302 , vertical tubes 303 and exhaust holes 304 .

[0061] The blower 2 is arranged at the bottom of the vertical roasting furnace 1, and the exhaust end of the blower 2 is connected to the air inlet end of the circular tube 301. The circular tube 301, the horizontal tube 302 and the vertical tube 303 are connected, and the top of the vertical tube 303 is closed.

[0062] In order to improve environmental protection, for example, Figure 1 As shown, the utility model also includes that the negative pressure collection group includes:

[0063] An exhaust port 4 is provided at the top of the vertical roasting furnace 1;

[0064] The exhaust fan 5 is connected to the exhaust interface 4 through a pipeline.

[0065] When in use, the exhaust gas generated by combustion can be sucked by the exhaust fan 5 and collected under negative pressure through the exhaust interface 4 on the top of the furnace. This is simple and fast, and there is no need to set up an additional smoke collection chamber. It solves the problem of collecting harmful gas components such as dust and high-concentration sulfur dioxide in the roasting exhaust gas, and achieves standard emission of roasting exhaust gas.

[0066] For uniform distribution of substances, for example, Figure 1 , 4 As shown, the utility model also includes that the premixing group 6 includes:

[0067] The premixing tank 601 is arranged on the vertical roasting furnace 1;

[0068] A catalyst inlet 602 is provided on the premixing tank 601;

[0069] Sodium carbonate auxiliary material inlet 603 is arranged on the premixing tank 601;

[0070] A water inlet 604 is provided on the premixing tank 601;

[0071] An observation window 605 is provided on the premixing tank 601;

[0072] A stirring rod 607 is provided on the premixing tank 601;

[0073] The motor 606 is disposed on the premixing tank 601 and connected to the stirring rod 607 .

[0074] When in use, the complete catalyst of the premixed group 6 is first mixed with the auxiliary material sodium carbonate so that the sodium carbonate is evenly distributed around the catalyst particles, and then the required amount of water is added and continued to be mixed to completely dissolve the sodium carbonate. After visually observing through the observation window 605 that no obvious white sodium carbonate powder is present, the sodium carbonate is dissolved in the water and immersed in the catalyst to contact the substance to be reacted.

[0075] A material pump 608 is installed outside the vertical roasting furnace 1. The feed end of the material pump 608 is connected to the premixing tank 601, and the discharge end of the material pump 608 is connected to the vertical roasting furnace 1. The material pump 608, the catalyst inlet 602, the sodium carbonate auxiliary material inlet 603 and the water inlet 604 are all provided with a one-way valve.

[0076] When in use, the mixed materials in the premixing group 6 are sent to the vertical roasting furnace 1 for combustion through the material pump 608. After roasting, carbon deposits, sulfur and other substances that may cause spontaneous combustion disappear.

[0077] When the utility model is in use, by optimizing the design of the blowing components in the furnace, the air duct group 3 is laid on the bottom of the furnace, so that during the combustion of the material, the air is evenly dispersed from the bottom and filled into the combustion material in the vertical roasting furnace 1, so that the combustion is sufficient. After the waste oil refining hydrogenation catalyst after mixing enters the vertical roasting furnace 1, the spontaneous combustion and heat release of sulfur and carbon in the catalyst are utilized for blast roasting without fuel energy consumption; the rare metal components in the catalyst are converted into soluble sodium salts, and the complete catalyst of the premixing group 6 is first mixed with the auxiliary material sodium carbonate so that the sodium carbonate is evenly distributed around the catalyst particles, and then the required amount of water is added to continue mixing so that the sodium carbonate is completely dissolved. After visually observing through the observation window 605 that there is no obvious white sodium carbonate powder, the sodium carbonate is dissolved in the water and immersed in the catalyst to contact with the substance to be reacted, and the mixed substance in the premixing group 6 is sent to the vertical roasting furnace 1 for combustion through the material pump 608. After roasting, the carbon deposits and sulfur and other substances that may cause spontaneous combustion disappear.

[0078] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency and low-energy consumption calcination pretreatment system for waste oil refining hydrogenation catalysts, characterized in that: include: Vertical roasting furnace (1); A blower (2) is arranged on the vertical roasting furnace (1); An air duct group (3) is arranged on the vertical roasting furnace (1) and connected to the blower (2); A negative pressure collection group is arranged on the vertical roasting furnace (1); The premixing group (6) is arranged on the vertical roasting furnace (1).

2. The high-efficiency and low-energy consumption calcination pretreatment system for waste oil refining hydrogenation catalyst according to claim 1 is characterized in that: The air duct group (3) comprises: A round tube (301) is fixed to the bottom of the vertical roasting furnace (1); At least one group of transverse tubes (302) are provided and are arranged at equal distances along the circular tube (301); At least one set of vertical pipes (303) is provided and arranged at equal distances along the top of the horizontal pipe (302); At least one group of exhaust holes (304) are provided and are opened at equal distances along the circumference of the vertical pipe (303).

3. The high-efficiency and low-energy consumption calcination pretreatment system for waste oil refining hydrogenation catalyst according to claim 2 is characterized in that: The blower (2) is arranged at the bottom of the vertical roasting furnace (1), and the exhaust end of the blower (2) is connected to the air inlet end of the circular tube (301). The circular tube (301), the horizontal tube (302) and the vertical tube (303) are connected, and the top of the vertical tube (303) is closed.

4. The high-efficiency and low-energy consumption calcination pretreatment system for waste oil refining hydrogenation catalyst according to claim 3 is characterized in that: The negative pressure collection group comprises: An exhaust port (4) is arranged at the top of the vertical roasting furnace (1); The exhaust fan (5) is connected to the exhaust interface (4) through a pipeline.

5. The high-efficiency and low-energy consumption calcination pretreatment system for waste oil refining hydrogenation catalyst according to claim 4 is characterized in that: The premix group (6) comprises: A premixing tank (601) is arranged on the vertical roasting furnace (1); A catalyst inlet (602) is provided on the premixing tank (601); A sodium carbonate auxiliary material inlet (603) is provided on the premixing tank (601); A water inlet (604) is provided on the premixing tank (601); An observation window (605) is provided on the premixing tank (601); A stirring rod (607) is disposed on the premixing tank (601); The motor (606) is disposed on the premixing tank (601) and connected to the stirring rod (607).

6. The high-efficiency and low-energy consumption calcination pretreatment system for waste oil refining hydrogenation catalyst according to claim 5 is characterized in that: A material pump (608) is installed outside the vertical roasting furnace (1); a feed end of the material pump (608) is connected to the premixing tank (601); a discharge end of the material pump (608) is connected to the vertical roasting furnace (1); and one-way valves are provided on the material pump (608), the catalyst inlet (602), the sodium carbonate auxiliary material inlet (603) and the water inlet (604).

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