Aluminum oxide recovery and reproduction system
By designing a centralized alumina recycling and reproduction system and using circulating water pipes for heat reuse, the problems of large dispersion and energy losses of traditional system equipment are solved, and high energy utilization and low production costs are achieved.
Patent Information
- Application Number
- CN202420407757.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-04
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-03-04
AI Technical Summary
Traditional alumina recycling and reproduction systems are dispersed, and the energy loss is large, resulting in a low energy utilization rate.
Alumina recycling and reproduction system was designed, including multiple equipment such as baking furnaces, leaching tanks, settlement tanks, reactors, aging tanks, filter presses, evaporation tanks and second baking furnaces, and heat re-removal through circulating water pipes Utilize, reduce the need for additional heating devices.
It effectively solves the problems of equipment dispersion and energy loss, improves energy utilization, reduces production costs, and improves the production efficiency of the system.
Smart Images
Figure CN222490002U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of metal element recovery and reproduction devices, and in particular relates to an aluminum oxide recovery and reproduction system with centralized equipment and high energy utilization rate. Background Art
[0002] As an important industrial raw material, alumina has a wide range of practical applications in industry due to its excellent physical and chemical properties. In particular, its good chemical stability and high mechanical strength make it more widely used in chemical, metallurgical, catalytic and other fields. Alumina carrier refers to white powder or formed aluminum oxide solid. It is the most widely used catalyst carrier, accounting for about 70% of industrial supported catalysts. Therefore, it is of great significance to efficiently recover aluminum from waste catalysts. Alumina is mostly prepared from its hydroxide (also known as hydrated aluminum oxide or aluminum oxide hydrate), and alumina has various forms, and different forms have different properties, such as density, pore structure, specific surface area, etc. These properties are of great significance for alumina used as a catalyst carrier.
[0003] At present, traditional alumina recovery and reproduction systems are relatively independent, with scattered equipment and large intermediate energy losses, resulting in low energy utilization and difficulty in centralized management. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an aluminum oxide recovery and reproduction system, which aims to solve the problems of scattered traditional aluminum oxide recovery and reproduction equipment and large energy loss, and improve energy utilization and reduce production costs through heat reuse.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A system for recycling and reproducing aluminum oxide, comprising: a first roasting furnace, used for high-temperature roasting of a mixture of a waste catalyst and an aluminum source to obtain a mixture of sodium aluminate solid and insoluble impurities; a leaching tank, the feed port of which is connected to the discharge port of the first roasting furnace, and used for leaching the roasted mixture; a settling tank, the feed port of which is connected to the discharge port of the leaching tank, and used for separating the leached mixture, wherein the separated leachate is a sodium aluminate solution; a reactor, the first feed port of which is connected to the leachate outlet of the settling tank, and the second feed port of which is connected to the discharge port of an acid storage tank, and the reactor is used for An alumina precursor solution is obtained after the leachate reacts with the acidic solution; an aging tank, the feed port of the aging tank is connected to the discharge port of the reactor, and is used for stirring and aging the alumina precursor solution; a filter press, the feed port of the filter press is connected to the discharge port of the aging tank, and is used for filtering and washing the aged slurry to obtain a pure alumina precursor filter cake; an evaporator, the feed port of the evaporator is connected to the discharge port of the filter press, and is used for drying the alumina precursor filter cake; a second calcination furnace, the feed port of the second calcination furnace is connected to the discharge port of the evaporator, and is used for high-temperature calcination of the alumina precursor filter cake to obtain a pure alumina material.
[0007] Preferably, a cooling pipe is provided outside the first roasting furnace, and a water storage tank is provided outside the leaching tank; a first circulating water pipe and a second circulating water pipe are formed between the cooling pipe outside the first roasting furnace and the water storage tank outside the leaching tank; low-temperature water in the water storage tank outside the leaching tank enters the cooling pipe outside the first roasting furnace through the second circulating water pipe to absorb waste heat and heat up; the heated high-temperature water returns to the water storage tank outside the leaching tank through the first circulating water pipe.
[0008] Preferably, a first circulating water delivery pump is provided on the second circulating water pipeline between the leaching tank and the first roasting furnace to provide power for directional flow of water.
[0009] Preferably, a first temperature detector and a first gate valve are provided on the first circulating water pipeline between the first roasting furnace and the leaching tank to control the temperature and flow rate of the transported water.
[0010] Preferably, a cooling pipe is provided outside the second roasting furnace, and a water storage tank is provided outside the aging tank. A third circulating water pipe and a fourth circulating water pipe are formed between the cooling pipe outside the second roasting furnace and the water storage tank outside the aging tank. Low-temperature water in the water storage tank outside the aging tank enters the cooling pipe outside the second roasting furnace through the third circulating water pipe to absorb waste heat and heat up. The heated high-temperature water returns to the water storage tank outside the aging tank through the fourth circulating water pipe.
[0011] Preferably, a second circulating water delivery pump is provided on the third circulating water pipeline between the aging tank and the second roasting furnace to provide power for directional flow of water.
[0012] Preferably, a second temperature detector and a second gate valve are provided on the fourth circulating water pipeline between the second roasting furnace and the aging tank to control the temperature and flow rate of the transported water.
[0013] Preferably, the outer sides of the first circulating water pipe, the second circulating water pipe, the third circulating water pipe and the fourth circulating water pipe are all provided with heat insulating aluminum foil insulation material to reduce heat loss.
[0014] The utility model adopts the above technical solution, which has the following advantages:
[0015] 1. The alumina recovery and reproduction system provided by the utility model effectively solves the problems of highly dispersed and large energy loss of traditional aluminum element recovery and alumina reproduction process equipment.
[0016] 2. The utility model adds a circulating water pipeline between the roasting furnace and the leaching tank and the aging tank. The constant temperature water in the leaching tank and the aging tank is heated by the residual heat after roasting in the roasting furnace, and is transported back to the leaching tank and the aging tank for leaching and aging after being controlled at the required temperature. The constant temperature water is heated and flows continuously, thereby forming a living water circulation loop to achieve efficient use of heat, thereby avoiding the addition of additional heating devices to the leaching tank and the aging tank, avoiding the input of additional heat, saving energy, and reducing production costs. At the same time, the low-temperature water transported to the roasting furnace can accelerate the cooling in the roasting furnace and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. The same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0018] Figure 1 A schematic structural diagram of an aluminum oxide recovery and reproduction system provided in one embodiment of the utility model.
[0019] The reference numerals in the figures are as follows:
[0020] 1-first roasting furnace; 2-first circulating water pipeline; 3-second circulating water pipeline; 4-first temperature detector; 5-first circulating water delivery pump; 6-first gate valve; 7-leaching tank; 8-sedimentation tank; 9-reactor; 10-acid storage tank; 11-third circulating water pipeline; 12-second circulating water delivery pump; 13-aging tank; 14-second temperature detector; 15-second gate valve; 16-fourth circulating water pipeline; 17-filter press; 18-evaporation tank; 19-second roasting furnace. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.
[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0027] The aluminum oxide recovery and reproduction system provided by the utility model includes: a first roasting furnace; a leaching tank, whose feed port is connected to the discharge port of the first roasting furnace; a settling tank, whose feed port is connected to the discharge port of the leaching tank; a reactor, whose first feed port is connected to the leachate outlet of the settling tank, and at the same time, the second feed port of the reactor is connected to the discharge port of the acid storage tank; an aging tank, whose feed port is connected to the discharge port of the reactor; a filter press, whose feed port is connected to the discharge port of the aging tank; an evaporator, whose feed port is connected to the discharge port of the filter press; and a second roasting furnace, whose feed port is connected to the discharge port of the evaporator. The utility model can simultaneously carry out the recovery of aluminum elements and the reproduction process of aluminum oxide, which can effectively solve the problems of dispersion and large energy loss of traditional production equipment; in addition, the system greatly reduces energy waste through heat reuse, reduces production costs, and also achieves energy conservation and environmental protection.
[0028] The aluminum oxide recovery and reproduction system provided by the embodiment of the utility model is described in detail below with reference to the accompanying drawings.
[0029] Embodiment 1
[0030] See also Figure 1The utility model provides an alumina recovery and reproduction system, comprising: a first roasting furnace 1, used for high-temperature roasting of a mixture of a waste catalyst and an aluminum source to obtain a mixture of sodium aluminate solid and other insoluble impurities; a leaching tank 7, the feed port of the leaching tank 7 is connected to the discharge port of the first roasting furnace 1, and is used to leach the roasted mixture; a sedimentation tank 8, the feed port of the sedimentation tank 8 is connected to the discharge port of the leaching tank 7, and is used to separate the leached mixture, and the separated leachate is the sodium aluminate solution; a reactor 9, the first feed port of the reactor 9 is connected to the leachate outlet of the sedimentation tank 8, and the second feed port of the reactor 9 is connected to the discharge port of the acid storage tank 10, and the reactor 9 Used to obtain an alumina precursor solution after the leachate reacts with the acid solution; an aging tank 13, the feed port of the aging tank 13 is connected to the discharge port of the reactor 9, and is used to stir and age the alumina precursor solution; a filter press 17, the feed port of the filter press 17 is connected to the discharge port of the aging tank 13, and is used to filter and wash the aged slurry to obtain a pure alumina precursor filter cake; an evaporator 18, the feed port of the evaporator 18 is connected to the discharge port of the filter press 17, and is used to dry the alumina precursor filter cake; a second calcining furnace 19, the feed port of the second calcining furnace 19 is connected to the discharge port of the evaporator 18, and is used to high-temperature roast the alumina precursor filter cake to obtain a pure alumina material.
[0031] In the above embodiment, preferably, a cooling pipe is provided outside the first roasting furnace 1, and a water storage tank is provided outside the leaching tank 7. A first circulating water pipe 2 and a second circulating water pipe 3 are formed between the external cooling pipe of the first roasting furnace 1 and the external water storage tank of the leaching tank 7. The low-temperature water in the external water storage tank of the leaching tank 7 enters the external cooling pipe of the first roasting furnace 1 through the second circulating water pipe 3 to absorb waste heat and heat up. The heated high-temperature water returns to the external water storage tank of the leaching tank 7 through the first circulating water pipe 2.
[0032] In the above embodiment, preferably, a first circulating water delivery pump 5 is provided on the second circulating water pipeline 3 between the leaching tank 7 and the first roasting furnace 1 to provide power for directional flow of water.
[0033] In the above embodiment, preferably, a first temperature detector 4 and a first gate valve 6 are provided on the first circulating water pipeline 2 between the first roasting furnace 1 and the leaching tank 7 to control the temperature and flow rate of the conveying water.
[0034] In the above embodiment, preferably, a cooling pipe is provided outside the second roasting furnace 19, and a water storage tank is provided outside the aging tank 13. A third circulating water pipe 11 and a fourth circulating water pipe 16 are formed between the external cooling pipe of the second roasting furnace 19 and the external water storage tank of the aging tank 13. The low-temperature water in the external water storage tank of the aging tank 13 enters the external cooling pipe of the second roasting furnace 19 through the third circulating water pipe 11 to absorb waste heat and heat up. The heated high-temperature water returns to the external water storage tank of the aging tank 13 through the fourth circulating water pipe 16.
[0035] In the above embodiment, preferably, the third circulating water pipeline 11 between the aging tank 13 and the second roasting furnace 19 is provided with a second circulating water delivery pump 12 for providing power for directional flow of water.
[0036] In the above embodiment, preferably, a second temperature detector 14 and a second gate valve 15 are provided on the fourth circulating water pipeline 16 between the second roasting furnace 19 and the aging tank 13 to control the temperature and flow rate of the transported water.
[0037] In the above embodiment, preferably, the outer sides of the first circulating water pipe 2, the second circulating water pipe 3, the third circulating water pipe 11 and the fourth circulating water pipe 16 are all provided with heat insulating aluminum foil insulation materials to reduce heat loss.
[0038] Embodiment 2
[0039] When the aluminum oxide recovery and reproduction system provided by the utility model is in use, while the waste catalyst and aluminum source mixed material are roasted in the first roasting furnace 1, the circulating water in the water storage tank outside the leaching tank 7 is directed to the cooling pipe outside the first roasting furnace 1 through the second circulating water pipeline 3 by the first circulating water delivery pump 5, and after being heated to the set temperature of the first temperature detector 4 by the residual heat, the first gate valve 6 is opened and returned to the water storage tank outside the leaching tank 7 through the first circulating water pipeline 2 to leach the roasted mixed material. The leached mixed material flows into the sedimentation tank 8 through the pipeline for separation, and the separated leaching liquid is the sodium aluminate solution, and the aluminum element recovery work of the first half of the system is completed.
[0040] The separated leachate enters the feed port at the upper end of the reactor 9 through a pipeline, and at the same time, the acid storage tank 10 is opened to add the acidic solution into the reactor 9 at a certain flow rate so that it can fully react with the leachate, and the alumina precursor solution is obtained after the reaction reaches a certain pH. The alumina precursor solution enters the aging tank 13 through a pipeline, and the circulating water in the external water storage tank of the aging tank 13 is directed to the external cooling pipeline of the second roasting furnace 19 through the third circulating water pipeline 11 by the second circulating water delivery pump 12. After the residual heat is heated to the set temperature of the second temperature detector 14, the second gate valve 15 is opened and returned to the external water storage tank of the aging tank 13 through the fourth circulating water pipeline 16, and the alumina precursor solution is stirred and aged. The aged slurry is transported to the filter press 17 through a pipeline for filtering and washing operations, and a pure alumina precursor filter cake is obtained after washing at least three times. After the filter cake is transferred to the evaporator 18 and fully dried, it is sent to the second roasting furnace 19 for high-temperature roasting to obtain a pure alumina material.
[0041] In summary, the utility model provides an alumina recovery and reproduction system with centralized equipment and high energy utilization, which effectively solves the problem of highly dispersed equipment and large energy loss in traditional aluminum element recovery and alumina reproduction processes. At the same time, the residual high temperature inside the system is used to heat the circulating water in some equipment, and the low-temperature circulating water accelerates the cooling of the roasting product in the roasting furnace, thereby achieving efficient use of heat and improving the production efficiency of the system. Through the combination and optimization of traditional equipment, this utility model has developed a production process that integrates waste catalyst efficient recovery and alumina re-preparation with high comprehensive heat utilization, which has high environmental significance and use value.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. An aluminum oxide recovery and reproduction system, characterized in that: include: The first calcining furnace is used to calcine the mixture of the waste catalyst and the aluminum source at high temperature to obtain a mixture of solid sodium aluminate and insoluble impurities; A leaching tank, the feed port of which is connected to the discharge port of the first roasting furnace, and is used to leach the roasted mixed material; A sedimentation tank, the feed port of which is connected to the discharge port of the leaching tank, and is used to separate the leached mixed material, and the separated leaching liquid is the sodium aluminate solution; A reactor, wherein the first feed port of the reactor is connected to the leachate outlet of the sedimentation tank, and the second feed port of the reactor is connected to the discharge port of the acid storage tank, and the reactor is used to obtain an alumina precursor solution after the leachate reacts with the acidic solution; An aging tank, the feed port of which is connected to the discharge port of the reactor, and is used for stirring and aging the alumina precursor solution; A filter press, the feed port of which is connected to the discharge port of the aging tank, and is used to filter and wash the aged slurry to obtain a pure alumina precursor filter cake; An evaporation tank, the feed port of which is connected to the discharge port of the filter press, and is used to dry the alumina precursor filter cake; A second calcining furnace, wherein the feed port of the second calcining furnace is connected to the discharge port of the evaporation tank, and is used for high-temperature calcining the alumina precursor filter cake to obtain pure alumina material.
2. The aluminum oxide recovery and regeneration system according to claim 1, characterized in that: A cooling pipe is arranged outside the first roasting furnace, and a water storage tank is arranged outside the leaching tank. A first circulating water pipe and a second circulating water pipe are formed between the cooling pipe outside the first roasting furnace and the water storage tank outside the leaching tank. Low-temperature water in the water storage tank outside the leaching tank enters the cooling pipe outside the first roasting furnace through the second circulating water pipe to absorb waste heat and heat up. The heated high-temperature water returns to the water storage tank outside the leaching tank through the first circulating water pipe.
3. The aluminum oxide recovery and regeneration system according to claim 2, characterized in that: The second circulating water pipeline between the leaching tank and the first roasting furnace is provided with a first circulating water delivery pump for providing power for directional flow of water.
4. The aluminum oxide recovery and reproduction system according to claim 2, characterized in that: A first temperature detector and a first gate valve are provided on the first circulating water pipeline between the first roasting furnace and the leaching tank to control the temperature and flow rate of the conveying water.
5. The aluminum oxide recovery and regeneration system according to claim 2, characterized in that: A cooling pipe is arranged outside the second roasting furnace, and a water storage tank is arranged outside the aging tank. A third circulating water pipe and a fourth circulating water pipe are formed between the cooling pipe outside the second roasting furnace and the water storage tank outside the aging tank. Low-temperature water in the water storage tank outside the aging tank enters the cooling pipe outside the second roasting furnace through the third circulating water pipe to absorb waste heat and heat up. The heated high-temperature water returns to the water storage tank outside the aging tank through the fourth circulating water pipe.
6. The aluminum oxide recovery and regeneration system according to claim 5, characterized in that: A second circulating water delivery pump is provided on the third circulating water pipeline between the aging tank and the second roasting furnace to provide power for directional flow of water.
7. The aluminum oxide recovery and regeneration system according to claim 5, characterized in that: A second temperature detector and a second gate valve are provided on the fourth circulating water pipeline between the second roasting furnace and the aging tank to control the temperature and flow rate of the delivered water.
8. The aluminum oxide recovery and re-production system according to any one of claims 5 to 7, characterized in that: The outsides of the first circulating water pipeline, the second circulating water pipeline, the third circulating water pipeline and the fourth circulating water pipeline are all provided with heat-insulating aluminum foil insulation materials to reduce heat loss.