CN115739946A - Aluminum electrolysis overhaul slag treatment system - Google Patents

Abstract

The application relates to the technical field of processing aluminium electroloysis overhaul sediment, it is specific, this application relates to an aluminium electroloysis overhaul sediment processing system includes: preparing a component for treating overhaul slag to form slurry; a tubular link apparatus, a first inlet of the tubular link apparatus connected to the preparation assembly, the tubular link apparatus comprising: the slurry mixing device comprises a plurality of connecting pipes and elbows, wherein one elbow is arranged between every two adjacent connecting pipes, and the tubular link is used for uniformly mixing slurry; the second inlet of the stay link equipment is connected with the first outlet of the tubular link equipment, and the stay link equipment is used for enabling the slurry to fully react, dissolving out fluoride and/or cyanide and forming to-be-discharged materials; and the treatment link equipment is connected with the second outlet of the stopping link equipment and is used for treating and discharging the to-be-discharged materials. The dissolution reaction and the subsequent treatment on the emissions are continuous, the release of fluorides and cyanides in the intermediate process is avoided, the reaction is more sufficient, and the treatment efficiency is improved.

Description

Aluminum electrolysis overhaul slag treatment system

Technical Field

The application relates to the technical field of treatment of aluminum electrolysis overhaul residues, in particular to an aluminum electrolysis overhaul residue treatment system.

Background

The electrolytic bath is a key production device in the electrolytic aluminum industry, and electrolytic bath electrolysis process is adopted to produce electrolytic aluminum in the production of electrolytic aluminum all over the world. The overhaul slag is solid dangerous waste which is inevitable in the aluminum electrolysis production process, and is listed in the national records of dangerous waste in 2016, and the overhaul slag is further accurately described in the national records of dangerous waste in 2021. China is the biggest world producing country of electrolytic aluminum, and the yield of electrolytic aluminum is 3850 million tons in 2021 year, which accounts for 57% of the whole world. The service life of the aluminum electrolysis cell is generally 6-8 years, and a large amount of solid waste slag is generated in the maintenance process. About 20kg of overhaul slag is generated per 1t of aluminum produced, and the amount of overhaul slag is very large in consideration of the backlog of decades and the original aluminum yield which is still increasing. The main toxic substances of the composite are soluble fluoride and cyanide, and the composite has great harm to soil, water areas, atmosphere and other environmental factors. For this reason, the fluoride and cyanide in the overhaul slag need to be disposed of to ensure that the overhaul slag is safely discharged and reused.

At present, the treatment and utilization modes of the overhaul slag mainly comprise a fire method process route and a wet method process route, and the fire method process investment is large; the wet process is mature and has more industrial application, but the wet treatment, particularly the dissolution process of toxic substances, is discontinuous, the normal temperature dissolution has limited technical applicability to regions with large temperature change all the year around, such as the north, and the process conditions of temperature, pressure and the like in the dissolution process can not be effectively controlled and kept stable, and the dissolution efficiency is low.

Therefore, there is a need for a system for treating aluminum electrolysis overhaul residues, which at least partially solves the problems in the prior art.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The present invention is directed to solving at least one of the problems of the prior art or the related art.

Therefore, the invention provides an aluminum electrolysis overhaul slag treatment system.

In view of this, according to the embodiment of the present application, there is provided an aluminum electrolysis overhaul slag treatment system, including:

preparing a component for treating overhaul slag to form slurry;

a tubular link apparatus, a first inlet of the tubular link apparatus connected to the preparation assembly, the tubular link apparatus comprising: a plurality of connecting pipes and elbows, wherein one elbow is arranged between every two adjacent connecting pipes, and the tubular links are used for uniformly mixing the slurry;

a retention link device, wherein a second inlet of the retention link device is connected to a first outlet of the tubular link device, and the retention link device is used for fully reacting the slurry to dissolve out fluoride and/or cyanide to form to-be-discharged material;

and the treatment link equipment is connected with the second outlet of the stopping link equipment and is used for treating and discharging the to-be-discharged materials.

In one possible embodiment, the tubular link apparatus comprises:

a plurality of serially connected tubular layers, wherein said tubular layer proximate to said preparation assembly is provided with said first inlet and said tubular layer proximate to said dwell-stage apparatus is provided with said first outlet, each of said tubular layers comprising: a plurality of said connecting pipes and said elbows, and one said elbow being disposed between each adjacent two of said connecting pipes.

A first temperature detection port opened in at least one of the tubular layers;

and the first pressure detection port is arranged on at least one tubular layer.

In a possible embodiment, the connection tube comprises:

the first pipe body is used for conveying the slurry;

the second body, the aforesaid first body is located to the cover, is formed with first accommodation space between above-mentioned first body and the aforesaid second body, and above-mentioned first accommodation space is used for holding the medium that adjusts the temperature.

In one possible embodiment, the dwell-stage apparatus includes:

a first housing in which the second inlet and the second outlet are formed;

a sampling port provided in the first housing;

a first toxicity detection port which is arranged on the first shell and is used for detecting the content of toxic substances in the slurry;

a temperature adjusting unit provided in the first casing and configured to adjust a temperature of the slurry;

and the pressure regulating assembly is arranged on the first shell and used for regulating the pressure of the slurry.

In one possible embodiment, the temperature adjustment assembly includes:

a second temperature detection port opened in the first housing;

the second shell is sleeved on the first shell, a second accommodating space is formed between the second shell and the first shell, and the second accommodating space is used for accommodating a temperature adjusting medium.

In a possible embodiment, the voltage regulating assembly includes:

a second pressure detection port provided in the first housing;

a pressurizing port provided in the second casing, communicating with the first casing, and increasing the pressure inside the first casing;

the first pressure relief opening is formed in the second shell, communicated with the first shell and used for relieving the internal pressure of the first shell;

a valve body provided in the pressure port and the first pressure relief port, respectively;

and a pressurizing device connected to the pressurizing port and used for conveying inert gas to the interior of the first shell through the pressurizing port.

In one possible embodiment, the pressure in the tubular link apparatus and/or the dwell link apparatus is between 0MPa and 1.6MPa;

the temperature of the slurry in the tubular link equipment and/or the stay link equipment is 15 ℃ to 80 ℃.

In a possible embodiment, the solid-to-liquid ratio of the slurry prepared by the preparation assembly is 1.

In one possible embodiment, the processing link device includes:

a settling link device connected to the second outlet for settling the slurry;

the filter pressing device is connected with the sedimentation link device through a slurry pump;

the evaporation device is respectively connected with the sedimentation link device and the filter pressing device and is used for evaporating clear liquid generated by sedimentation and filtrate generated by filter pressing;

and the gas purification device is connected to the sedimentation link device.

In one possible embodiment, the sedimentation segment apparatus comprises:

a third casing having a third inlet and a third outlet formed therein, wherein the third inlet is connected to the second outlet, and the third outlet is connected to the filter press device by the slurry pump; a clear liquid outlet which is opened on the third shell and is connected with the evaporation device; a gas outlet provided in the third casing and connected to the gas purification device;

a second toxicity detection port which is arranged on the third shell and is used for detecting the content of toxic substances in the clear liquid;

a third pressure detection port provided in the third casing;

and the second pressure relief opening is formed in the third shell and used for relieving the gas pressure in the third shell.

Compared with the prior art, the invention at least comprises the following beneficial effects: the aluminum electrolysis overhaul slag disposal system provided by the embodiment of the application is provided with a preparation component, tubular link equipment, stopping link equipment and treatment link equipment. Specifically, after the overhaul slag is crushed by the preparation assembly, agents such as a fluorine removing agent and a cyanogen removing agent are added, wet grinding is carried out to prepare slurry with a certain solid-liquid ratio, the slurry is conveyed into the tubular link equipment through the first inlet, the slurry flows in a turbulent manner in the tubular link equipment, so that the overhaul slag is fully mixed with the agents such as the fluorine removing agent and the cyanogen removing agent, pressure is generated, then the fully mixed slurry is conveyed into the stay link equipment through the first outlet and the second inlet, and proper temperature and pressure are provided for the slurry in the stay link equipment, so that the overhaul slag and the agents fully react, fluorides and cyanides are dissolved out, and to-be-discharged substances are formed, so that residual fluorides and cyanides in the to-be-discharged substances meet the discharge and reuse standards. So set up for the thick liquids configuration, fluoride and the dissolution reaction of cyanide and follow-up treatment of treating emission utilize continuous incessantly, avoided in the middle-process, harmful fluoride and cyanide release to make the reaction more abundant, improve treatment effeciency.

Other advantages, objects, and features of the aluminum electrolysis overhaul slag handling system of the present invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the present invention.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the specification. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of an aluminum electrolysis overhaul slag disposal system provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of one direction of a tubular link device according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another direction of a tubular link device according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a staying link apparatus according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a settling link device provided in an embodiment of the present application.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 5 is:

110 preparation component, 120 tubular link device, 121 first inlet, 122 tubular layer, 123 connecting pipe, 1231 first pipe, 1232 second pipe, 124 elbow, 125 first temperature detection port, 126 first pressure detection port, 127 first outlet, 130 dwell link device, 131 first housing, 132 second inlet, 133 second outlet, 134 sampling port, 135 first toxicity detection port, 136 second temperature detection port, 137 second housing, 138 second pressure detection port, 139 pressurization port, 140 second pressure relief port, 150 treatment link device, 151 sedimentation link device, 1511 third housing, 1512 third inlet, 1513 third outlet, 1514 clear liquid outlet, 1515 gas outlet, 1516 second toxicity detection port, 1517 third pressure detection port, 1518 second pressure relief port, 152 filter press device, 153 evaporator, 154 gas purification device.

Detailed Description

In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below with reference to the drawings and the specific embodiments, and it should be understood that the specific features of the embodiments and the embodiments of the present application are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and the embodiments of the present application may be combined with each other without conflict.

As shown in fig. 1, according to an embodiment of the present application, there is provided an aluminum electrolysis overhaul slag treatment system, including: a preparation component 110 for processing overhaul slag to form slurry; a tubular link apparatus 120, a first inlet 121 of the tubular link apparatus 120 being connected to the preparation assembly 110, the tubular link apparatus 120 comprising: a plurality of connecting pipes 123 and elbows 124, wherein one elbow 124 is disposed between every two adjacent connecting pipes 123, and the tubular links are used for uniformly mixing the slurry; a retention-element means 130, said retention-element means 130 having a second inlet 132 connected to said first outlet 127 of said tubular-element means 120, said retention-element means 130 adapted to allow said slurry to react sufficiently to dissolve fluoride and/or cyanide therefrom to form a discharge to be discharged; a treatment-link apparatus 150 connected to the second outlet 133 of the dwell-link apparatus 130 for treating and discharging the effluent.

It can be understood that the aluminum electrolysis overhaul slag disposal system provided by the embodiment of the application is provided with a preparation component 110, a tubular link device 120, a stay link device 130 and a treatment link device 150. Specifically, after the overhaul slag is crushed by the preparation assembly 110, agents such as a fluorine removing agent and a cyanogen removing agent are added, wet grinding is carried out to prepare slurry with a certain solid-liquid ratio, the slurry is conveyed into the tubular link equipment 120 through the first inlet 121, the slurry flows in a turbulent manner in the tubular link equipment 120, so that the overhaul slag is fully mixed with the agents such as the fluorine removing agent and the cyanogen removing agent, pressure is generated, a temperature adjusting medium in the first accommodating space provides temperature guarantee, then the fully mixed slurry is conveyed into the stay link equipment 130 through the first outlet 127 and the second inlet 132, and in the stay link equipment 130, proper temperature and pressure are provided for the slurry, so that the overhaul slag and the agents fully react, fluoride and cyanide are dissolved out, and to-be-discharged materials are formed, and residual fluoride and cyanide in the to-be-discharged materials meet the discharge and reuse standards. By the arrangement, the slurry is prepared, the dissolution reaction of fluoride and cyanide and the subsequent treatment and utilization of the emissions to be treated are continuous and uninterrupted, the release of harmful fluoride and cyanide in the middle process is avoided, the reaction is more sufficient, and the treatment efficiency is improved.

It is understood that the preparation component 110 can perform rough crushing and fine crushing operations on the overhaul slag to obtain overhaul slag particles so as to reduce the surface area of the overhaul slag particles for subsequent full contact with the medicament, and wet grinding the overhaul slag particles after mixing with the medicament containing the fluorine removing agent and the cyanogen removing agent so as to obtain the slurry with a certain solid-to-liquid ratio.

It is understood that a plurality of the stay link devices 130 may be provided, and a plurality of the stay link devices 130 may be provided in parallel, and in particular, the number of the stay link devices 130 may be determined according to the amount of the slurry.

In some examples, as shown in fig. 2, the tubular link apparatus 120 described above comprises: a plurality of serially connected tubular layers 122, wherein said tubular layer 122 adjacent to said preparation assembly 110 is provided with said first inlet 121, said tubular layer 122 adjacent to said dwell-link apparatus 130 is provided with said first outlet 127, each of said tubular layers 122 comprising: a plurality of the connection pipes 123 and the elbows 124, and one elbow 124 is disposed between every two adjacent connection pipes 123. A first temperature detection port 125 opened in at least one of the tubular layers 122; the first pressure detection port 126 is opened in at least one of the tubular layers 122.

It can be understood that the tubular link device 120 is provided with a plurality of tubular layers 122, and the plurality of tubular layers 122 are connected in series with each other to increase the overall length of the tubular layers 122, improve the mixing time of the overhaul slag and the agents such as the fluorine removing agent and the cyanogen removing agent, and ensure that the mixing is more sufficient. And each tubular layer 122 is made up of a plurality of connecting tubes 123 and bends 124. Specifically, an elbow 124 is arranged between every two adjacent connecting pipes 123, and the arrangement direction of the connecting pipes 123 is changed through the elbow 124, so that each tubular layer 122 is S-shaped, the overall length of each tubular layer 122 is further increased, and the overhaul residues and the medicament are more fully mixed.

It is understood that the number of the tubular layers 122 and the number of the connecting pipes 123 and the elbows 124 in each tubular layer 122 can be determined according to the amount of slurry to be processed, for example, 1 to 6 tubular layers 122 can be provided, and a plurality of connecting pipes 123 can be horizontally or vertically arranged in the tubular layers 122 according to the actual use scenario. Each tubular layer 122 may be provided with 2 to 6 connecting pipes 123 connected in series.

It is understood that a first temperature sensing port 125 and a first pressure sensing port 126 may be formed in the tubular layer 122 for sensing the temperature and pressure of the slurry within the tubular layer 122. The pressure of the slurry within the tubular layer 122 is determined by the degree of bending and the length of the tubular layer 122. Thereby detecting the mixing state of the overhaul slag particles and the medicament in the tubular layer 122. And the first temperature detection port 125 and the first pressure detection port 126 are provided with sealing members, so that the tubular layer 122 maintains a sealed state without detecting the pressure and temperature of the slurry, thereby preventing the leakage of harmful substances.

In some examples, as shown in fig. 3, the connection pipe 123 includes: a first pipe 1231 for conveying the slurry; and a second pipe 1232 surrounding the first pipe 1231, wherein a first receiving space is formed between the first pipe 1231 and the second pipe 1232, and the first receiving space is used for receiving a temperature adjusting medium.

It is understood that the connection pipe 123 is provided with a first pipe 1231 and a second pipe 1232. Specifically, the first pipe body 1231 is sleeved with the second pipe body 1232, and the first temperature detection port 125 can be opened on the second pipe body 1232 and is communicated with the first pipe body 1231, so that the temperature sensor can be inserted into the first pipe body 1231 to detect the temperature of the slurry. The first pressure detecting port 126 may be opened on the second tube 1232 and connected to the first tube 1231, so as to insert a pressure sensor into the first tube 1231 for detecting the slurry pressure. And be formed with first accommodation space between first body 1231 and the second body 1232, first accommodation space can hold the temperature adjusting medium to according to the thick liquids temperature data that first temperature detection mouth 125 detected, adjust the temperature of the temperature adjusting medium, and then to the thick liquids cooling in the first body 1231, keep warm or heat. So as to avoid the condition that the temperature of the slurry in the tubular link equipment 120 is influenced by the external temperature to cause insufficient mixing, especially in the northern area and other areas with large annual temperature change. Improve the stability and the subsequent dissolution efficiency.

It can be understood that a plurality of first temperature adjusting medium passages are formed in the first accommodating space, and the plurality of first temperature adjusting medium passages may be arranged in series to adjust the temperature of the temperature adjusting medium in the first accommodating space as a whole, or the plurality of first temperature adjusting medium passages may be arranged in parallel, and when it is detected that the temperature at the local area in the first pipe body 1231 needs to be adjusted, the temperature of the temperature adjusting medium at the local area can be adjusted by the corresponding first temperature adjusting medium passages. In some examples, as shown in fig. 4, the dwelling link apparatus 130 includes: a first housing 131, the first housing 131 having the second inlet 132 and the second outlet 133 formed therein; a sampling port 134 provided in the first housing 131; a first toxicity detection port 135 provided in the first housing 131 for detecting a content of a toxic substance in the slurry; a temperature adjusting unit disposed in the first housing 131 for adjusting the temperature of the slurry; and a pressure regulating assembly disposed in the first housing 131 for regulating the pressure of the slurry.

It will be appreciated that the dwell-link apparatus 130 is provided with a first housing 131, a sampling port 134, a first toxicity detection port 135, a temperature adjustment assembly, and a pressure adjustment assembly. Wherein the first housing 131 is formed with a second inlet 132 and a second outlet 133, and the slurry, which is thoroughly mixed by the pipe-link apparatus 120, is conveyed through the second inlet 132 into the first housing 131 where it remains to react sufficiently to leach out the hazardous fluorides and cyanides. And a sampling port 134 is opened on the first housing 131 to obtain a slurry sample, which is convenient for a worker to analyze the current slurry state. A first toxicity detection port 135 is further opened at the first casing 131 to detect the current fluoride and cyanide dissolution of the slurry and whether the slurry meets the discharge and reuse standards. The temperature adjusting component is arranged on the first shell 131 to adjust the temperature of the slurry in the first shell 131, the pressure adjusting component is arranged on the first shell 131 to adjust the pressure of the slurry in the first shell 131 to ensure that the slurry is always provided with proper temperature and pressure, so that overhaul residues and medicaments are fully reacted, fluoride and cyanide are continuously and efficiently dissolved out from the overhaul residues, the reaction adjustment is stable and controllable, the influence degree of regional seasonal temperature change on the reaction is reduced, and the reliability is improved.

It can be understood that the sampling port 134, the first toxicity detection port 135, the temperature adjustment assembly and the pressure adjustment assembly are provided with sealing members to ensure the sealing performance of the stay link device 130 and ensure the reaction can be continuously and stably performed.

Illustratively, F-, CN-, and PH can be detected at the first toxicity detection port 135 by a toxic component detection meter.

In some examples, as shown in fig. 4, the temperature adjustment assembly includes: a second temperature detection port 136 opened in the first housing 131; and a second housing 137 which is fitted over the first housing 131, wherein a second accommodating space for accommodating a temperature adjusting medium is formed between the second housing 137 and the first housing 131.

It is understood that the temperature adjusting assembly is provided with a second temperature sensing port 136 and a second housing 137. Specifically, the second housing 137 is sleeved on the first housing 131, and the second temperature detection port 136 is disposed on the first housing 131, so that the temperature sensor can be inserted into the first housing 131 from the second temperature detection port 136 to detect the current temperature of the slurry. Be formed with the second accommodation space between first casing 131 and second casing 137, the second accommodation space can hold the temperature adjusting medium to according to the thick liquids temperature data that second temperature detection mouth 136 detected, the temperature of adjustment temperature adjusting medium, and then to the thick liquids cooling in the first casing 131, keep warm or heat. The influence degree of the seasonal temperature change of the region on the reaction is reduced, and the reliability is improved.

It can be understood that a plurality of second temperature adjusting medium passages are formed in the second accommodating space, and the plurality of second temperature adjusting medium passages may be arranged in series to adjust the temperature of the temperature adjusting medium in the second accommodating space as a whole, or the plurality of second temperature adjusting medium passages may be arranged in parallel, and when it is detected that the temperature at the local area in the first housing 131 needs to be adjusted, the temperature of the temperature adjusting medium at the local area can be adjusted by the corresponding second temperature adjusting medium passages.

In some examples, as shown in fig. 4, the voltage regulating assembly includes: a second pressure detection port 138 opened in the first housing 131; a pressurizing port 139 that is opened in the second casing 137, communicates with the first casing 131, and increases the internal pressure of the first casing 131; a first pressure relief port opened in the second casing 137, communicated with the first casing 131, and configured to relieve an internal pressure of the first casing 131; a valve body provided in the pressure port 139 and the first relief port, respectively; and a pressurizing device connected to the pressurizing port 139, for supplying an inert gas into the first casing 131 through the pressurizing port 139.

It will be appreciated that the pressure regulator assembly is provided with a second pressure sensing port 138, a pressurization port 139, a first pressure relief port, a valve body and a pressurization device. Specifically, the second pressure detection port 138 is opened in the first casing 131, and a pressure sensor can be inserted into the first casing 131 from the second pressure detection port 138 to detect the current pressure of the slurry. From the data detected by the pressure sensor, it is determined how the pressure inside the first housing 131 is adjusted. The pressurizing port 139 is opened in the second housing 137 and is communicated with the first housing 131, and the pressurizing port 139 is connected to a pressurizing device. When the internal pressure of the first housing 131 needs to be increased, the valve body at the pressure port 139 is opened, and the pressure device delivers inert gas such as argon gas into the first housing 131 through the pressure port 139, so that the internal pressure of the first housing 131 is increased, and the inert gas does not react with the slurry, thereby improving the stability. When the internal pressure of the first housing 131 needs to be reduced, the valve body at the first pressure relief port is opened to relieve the pressure in the first housing 131. So as to always ensure that the internal pressure of the first shell 131 is within a proper range, so that the reaction is more sufficient and the dissolution efficiency is improved.

In some examples, the pressure within the tubular link apparatus 120 and/or the dwell link apparatus 130 is 0MPa to 1.6MPa; the slurry temperature in the tubular link apparatus 120 and/or the retention link apparatus 130 is 15 ℃ to 80 ℃.

It can be understood that the pressure in the tubular link device 120 and the staying link device 130 is controlled within the range of 0MPa to 1.6MPa, and the temperature of the slurry in the tubular link device 120 and the staying link device 130 is controlled within the range of 15 ℃ to 80 ℃, so that the slurry in the tubular link device 120 is fully mixed, the slurry in the staying link device 130 is fully reacted, and the dissolution efficiency is improved. And the pressure within the tubular link apparatus 120 may be determined based on the degree of bending and length of the tubular layer 122.

In some examples, the solid-to-liquid ratio of the slurry produced via the production assembly 110 is 1. So as to ensure that the overhaul slag particles in the subsequent slurry are fully mixed with the reaction medicament. Ensuring the dissolution effect.

In some examples, as shown in fig. 1, the processing link apparatus 150 includes: a settling link device 151 connected to the second outlet 133 for settling the slurry; a filter pressing device 152 connected to the settling link device 151 through a slurry pump; an evaporation device 153, which is respectively connected to the settling link device 151 and the filter-pressing device 152, and is used for evaporating the clear liquid generated by settling and the filtrate generated by filter-pressing; and a gas purification device 154 connected to the settling-stage device 151.

It will be appreciated that the process train equipment 150 is provided with a settling train device 151, a pressure filtration device 152, an evaporation device 153 and a gas purification device 154. In particular, the settling-stage apparatus 151 is connected to the second outlet 133 to deliver the effluent to be treated, from which fluoride and cyanide are dissolved, to the settling-stage apparatus 151 for settling. So that the emissions to be discharged are stratified to produce a sediment and a clear liquid, which is located above the sediment. The filter pressing device 152 is connected to the sedimentation link device 151 through a slurry pump, and is used for filter pressing of sediment through the filter pressing device 152 to generate filter residue and filtrate, and the filter residue is recycled after being transported out. And the evaporation plant 153 is respectively connected with the sedimentation link device 151 and the filter pressing device 152, the clear liquid and the filtrate can be pumped into the evaporation plant 153 through the pump body for evaporation treatment, the salt obtained by evaporation can be comprehensively utilized, the distilled water obtained by evaporation can be recycled, and the resource utilization rate is improved. The gas purification device 154 is connected to the settling link device 151 to purify the gas in the settling link device 151, further eliminate the residual harmful substances, and ensure that the emission meets the standard.

In some examples, as shown in fig. 5, the settling-element device 151 includes: a third housing 1511, wherein a third inlet 1512 and a third outlet 1513 are formed in the third housing 1511, wherein the third inlet 1512 is connected to the second outlet 133, and the third outlet 1513 is connected to the filter pressing device 152 by the slurry pump; a clear liquid outlet 1514 provided in the third casing 1511 and connected to the evaporation device 153; a gas outlet 1515 provided in the third casing 1511 and connected to the gas purification device 154; a second toxicity detection port 1516 opened in the third case 1511 for detecting the content of the toxic substance in the clear liquid; a third pressure detection port 1517 opened in the third case 1511; and a second pressure relief port 1518140 opened in the third case 1511, for relieving the gas pressure in the third case 1511.

It is understood that the settling-stage apparatus 151 is provided with a third housing 1511, a clear liquid outlet 1514, a gas outlet 1515, a second toxicity detection port 1516, a third pressure detection port 1517 and a second pressure relief port 1518140. Wherein the third case 1511 is formed with a third inlet 1512 and a third outlet 1513, wherein the third inlet 1512 and the second outlet 133 are connected to deliver the emissions into the third case 1511 through the second outlet 133 and the third inlet 1512. The third outlet 1513 is connected to the pressure filtration device 152 by a slurry pump to deliver the settled sediment to the pressure filtration device 152 for pressure filtration. The clear liquid outlet 1514 is disposed on the third housing 1511 at a position above the middle of the third housing 1511 to deliver the clear liquid generated after sedimentation to the evaporation device 153, and specifically, a pump body may be disposed between the evaporation device 153 and the clear liquid outlet 1514 to pump the clear liquid into the evaporation device 153. The third pressure detection port 1517 is disposed on the third case 1511 to detect the pressure in the third case 1511, and the second pressure relief port 1518140 is disposed on the third case 1511, so that when it is detected that the pressure in the third case 1511 is too large, the pressure is relieved through the second pressure relief port 1518140, and the stability of the sedimentation process is ensured. The second toxicity detection port 1516 is disposed in the third case 1511, and can be inserted into the third case 1511 from the second toxicity detection port 1516 by an online toxicity detector to detect the content of toxic substances in the third case 1511, so as to ensure that after being processed by the tubular link device 120 and the stay link device 130, cyanide and fluoride in the overhaul slag are dissolved out well, and the emission meets the emission and recycling standards.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An aluminum electrolysis overhaul slag disposal system is characterized by comprising:

preparing a component for treating overhaul residues to form slurry;

a tubular link apparatus, a first inlet of the tubular link apparatus connected to the preparation assembly, the tubular link apparatus comprising: the slurry mixing device comprises a plurality of connecting pipes and elbows, wherein one elbow is arranged between every two adjacent connecting pipes, and the tubular links are used for uniformly mixing the slurry;

a second inlet of the stay link apparatus is connected to a first outlet of the tubular link apparatus, and the stay link apparatus is used for fully reacting the slurry, and dissolving out fluoride and/or cyanide to form a to-be-discharged material;

and the treatment link equipment is connected with the second outlet of the stopping link equipment and is used for treating and discharging the to-be-discharged materials.

2. The aluminum electrolytic overhaul slag handling system of claim 1, wherein the tubular link apparatus comprises:

a plurality of serially connected tubular layers, wherein the tubular layer proximate to the preparation assembly is provided with the first inlet and the tubular layer proximate to the dwell-link apparatus is provided with the first outlet, each of the tubular layers comprising: the connecting pipes and the elbows are arranged in a plurality, and one elbow is arranged between every two adjacent connecting pipes.

The first temperature detection port is formed in at least one tubular layer;

and the first pressure detection port is arranged on at least one tubular layer.

3. The aluminum electrolytic overhaul slag handling system of claim 2, wherein the connecting tube comprises:

a first pipe for transporting the slurry;

the second pipe body is sleeved on the first pipe body, a first accommodating space is formed between the first pipe body and the second pipe body, and the first accommodating space is used for accommodating a temperature adjusting medium.

4. The aluminum electrolytic overhaul slag handling system of claim 2, wherein the dwell-link apparatus comprises:

a first housing formed with the second inlet and the second outlet;

the sampling port is arranged on the first shell;

the first toxicity detection port is formed in the first shell and used for detecting the content of toxic substances in the slurry;

the temperature adjusting component is arranged on the first shell and used for adjusting the temperature of the slurry;

and the pressure regulating assembly is arranged on the first shell and used for regulating the pressure of the slurry.

5. The aluminum electrolytic overhaul slag handling system of claim 4, wherein the temperature conditioning assembly comprises:

the second temperature detection port is formed in the first shell;

the second shell is sleeved on the first shell, a second accommodating space is formed between the second shell and the first shell, and the second accommodating space is used for accommodating a temperature regulating medium.

6. The aluminum electrolytic overhaul slag handling system of claim 4, wherein the pressure regulating assembly comprises:

the second pressure detection port is formed in the first shell;

the pressurizing port is arranged on the second shell, communicated with the first shell and used for increasing the internal pressure of the first shell;

the first pressure relief opening is formed in the second shell, communicated with the first shell and used for relieving the internal pressure of the first shell;

the valve body is respectively arranged at the pressurization port and the first pressure relief port;

and the pressurizing device is connected to the pressurizing port and used for conveying inert gas to the interior of the first shell through the pressurizing port.

7. The aluminum electrolytic overhaul slag treatment system according to claim 1,

the pressure in the tubular link equipment and/or the stay link equipment is 0MPa to 1.6MPa;

the slurry temperature in the tubular link equipment and/or the stay link equipment is 15 ℃ to 80 ℃.

8. The aluminum electrolytic overhaul slag handling system of claim 1,

the solid-to-liquid ratio of the slurry prepared by the preparation assembly is 1.

9. The aluminum electrolytic overhaul slag handling system of claim 4, wherein the treatment link equipment comprises:

the sedimentation link device is connected with the second outlet and is used for sedimentation of the slurry;

the filter pressing device is connected with the sedimentation link device through a slurry pump;

the evaporation device is respectively connected with the sedimentation link device and the filter pressing device and is used for evaporating clear liquid generated by sedimentation and filtrate generated by filter pressing;

and the gas purification device is connected with the sedimentation link device.

10. The aluminum electrolytic overhaul slag handling system of claim 9, wherein the settling link device comprises:

a third housing formed with a third inlet and a third outlet, wherein the third inlet is connected to the second outlet and the third outlet is connected to the filter pressing device by the slurry pump;

a clear liquid outlet which is arranged on the third shell and is connected with the evaporation device;

the gas outlet is formed in the third shell and connected to the gas purification device;

the second toxicity detection port is formed in the third shell and used for detecting the content of toxic substances in the clear liquid;

the third pressure detection port is formed in the third shell;

and the second pressure relief opening is formed in the third shell and used for relieving the gas pressure in the third shell.

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