Intelligent feeding system

Abstract

The intelligent feeding system comprises a pneumatic chute conveying system, a discharging bin, a discharging pipe I and a discharging pipe II, an outlet of the discharging pipe I is provided with a discharging valve I and connected with a feeding port of a pneumatic chute I, the tail end of the pneumatic chute I is connected with a discharging pipe I, and a sensor I is installed on the discharging pipe I; an outlet of the discharging pipe II is provided with a discharging valve II and connected with a feeding port of a pneumatic chute II, the tail end of the pneumatic chute II is connected with a discharging pipe II, and the discharging pipe II is provided with a sensor II; the fan I and the fan II provide high-pressure air, and an air supply pipeline of the pneumatic chute is provided with a control valve. According to the utility model, the material conveying is not interrupted, the environment-friendly emission index of the aluminum electrolysis flue gas purification system is ensured to be qualified and stable, and the hidden danger of excessive emission caused by flow or equipment failure is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum electrolysis, in particular to a feeding system for conveying fresh aluminum oxide to a dust collector of a flue gas purification system. Background Art

[0002] In the aluminum electrolysis industry, the traditional method of purifying aluminum electrolysis flue gas mainly relies on the dry method principle. This process cleverly utilizes the adsorption characteristics of alumina, the raw material for electrolysis. Alumina plays the role of an adsorbent in this system. By performing an adsorption reaction inside the dust collector of the purification system, the concentration of hydrogen fluoride and sulfur dioxide gases in the electrolysis flue gas is effectively reduced. The key to this process lies in the silos set up in the two electrolysis plant rooms, where fresh alumina starts from the fresh silo and is transported to the dust collector of the purification system through a pneumatic chute to complete the adsorption reaction. Part of the reacted fluorine-containing alumina is recovered for cyclic adsorption, while the other part is transported to the fluorine-containing silo and continues to be an important raw material for aluminum electrolysis production.

[0003] However, the conveying process of fresh alumina from the fresh bin to the dust collector of the purification system must be continuous, sufficient and stable. Any material stoppage failure that cannot be restored in time may cause the emission concentration at the discharge port to exceed the national standard. At present, this conveying process is completely dependent on the pneumatic chute system. Once the process or equipment fails, the conveying of alumina will be interrupted, which will have a serious impact on the feeding of the dust collector of the purification system, and then cause the emission concentration of fluoride and sulfur dioxide gas to increase, exceeding the environmental protection standard. The maintenance process often takes more than several hours. Long-term material stoppage will not only cause environmental problems, but also have a negative impact on production efficiency.

[0004] The current conveying system lacks clear and effective control measures. Once the process or equipment fails, the interruption of material transportation will be inevitable. This not only requires a lot of manpower and time to repair the failure, but also has a huge impact on environmental indicators during the repair period. Therefore, improving the existing conveying system and enhancing its stability and reliability are crucial to ensuring environmental protection and production efficiency in the aluminum electrolysis industry. Utility Model Content

[0005] The utility model provides an intelligent feeding system, the purpose of which is to achieve effective control over the process of conveying fresh alumina from a fresh bin to a dust collector of a purification system, to ensure uninterrupted material transportation, to eliminate the hidden danger of non-stop feeding of the dust collector of the purification system, and to prevent environmental accidents caused by process or equipment failures.

[0006] The technical solution adopted by the utility model is:

[0007] An intelligent feeding system comprises two pneumatic chute conveying systems, a discharge bin, a discharge pipe I and a discharge pipe II, wherein the discharge pipe I is connected to one pneumatic chute conveying system, and the discharge pipe II is connected to another pneumatic chute conveying system;

[0008] The outlet of the discharge pipe I is provided with a discharge valve I and connected to the feed port of the pneumatic chute I. The tail end of the pneumatic chute I is connected to the discharge pipe I, and the discharge pipe I is provided with a sensor I;

[0009] The outlet of the discharge pipe II is provided with a discharge valve II and connected to the feed port of the pneumatic chute II. The tail end of the pneumatic chute II is connected to the discharge pipe II, and the discharge pipe II is provided with a sensor II.

[0010] A control valve II is provided on the air supply pipeline of the pneumatic chute I and a branch valve is provided on the branch of the air supply pipeline; the air supply pipelines of the two pneumatic chute conveying systems are connected by a control valve I.

[0011] Furthermore, a control valve III is provided on the air supply pipeline of the pneumatic chute II, and the control valve I is connected to one end of the outlet of the control valve II and the control valve III.

[0012] Furthermore, the feed pipe I is a main feed pipe, the feed pipe II is a spare feed pipe, and the feed pipe II is welded to the side of the feed pipe I.

[0013] Furthermore, the pneumatic chute I and the pneumatic chute II are both composed of at least two chute sections connected in series; each chute section includes a material chamber, a breathable plate and an air chamber at the bottom of the material chamber, and the air chamber of each chute section is respectively connected to a branch pipe; the branch pipe is connected to the air supply pipeline, and a branch pipe valve is respectively arranged on each branch pipe.

[0014] Furthermore, the discharge valve I and the discharge valve II are both equipped with motors and frequency converters; the control valve I, the control valve II and the control valve III on the air supply pipeline are all pneumatic butterfly valves; and the branch valve is a manual butterfly valve.

[0015] Furthermore, the branch pipe valve is kept in a normally open state.

[0016] Furthermore, the sensor I and the sensor II are contact sensors.

[0017] Furthermore, the air supply pipelines of the two pneumatic chute conveying systems provide high-pressure air through fan I and fan II respectively.

[0018] Furthermore, the fans I and II are high-pressure centrifugal fans.

[0019] Furthermore, the discharge valve I, discharge valve II, control valve I, control valve II, control valve III, sensor I, sensor II, fan I and fan II are all connected to the controller in telecommunication.

[0020] The beneficial effects of the utility model are as follows: the intelligent feeding system of the utility model is used for the process of conveying fresh alumina from the fresh bin to the dust collector of the purification system, and includes two sets of associated conveying systems with exactly the same functions. One set of pneumatic chutes is used for conveying, and the other set is in a standby state. When a process or equipment in operation fails, the system can interlock and start the standby process and equipment, which is beneficial to ensure uninterrupted material transportation and realize efficient control of the feeding process of the dust collector of the flue gas purification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the pneumatic chute conveying system before the transformation;

[0022] Figure 2 It is a schematic diagram of the intelligent feeding system of the utility model;

[0023] The serial numbers and names in the figure are as follows:

[0024] 1-unloading bin; 2-discharging pipe Ⅰ; 3-discharging pipe Ⅱ; 4-unloading valve Ⅰ; 5-pneumatic chute Ⅰ; 6-discharging pipe Ⅰ; 7-sensor Ⅰ; 8-unloading valve Ⅱ; 9-pneumatic chute Ⅱ; 10-discharging pipe Ⅱ; 11-sensor Ⅱ; 12-fan Ⅰ; 13-fan Ⅱ; 14-branch valve; 15-control valve Ⅰ; 16-control valve Ⅱ; 17-control valve Ⅲ; 18-air pipe. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the embodiments of the invention in conjunction with the accompanying drawings to make the objectives, technical solutions and technical effects of the invention more clearly presented.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] Example 1

[0028] like Figure 1 As shown, the existing pneumatic chute conveying system, the basic structure of the existing pneumatic chute conveying system includes: a discharge bin, a discharge valve, a pneumatic chute, an air supply pipeline, etc., which is used to transport fresh alumina from the fresh bin to the dust collector of the purification system.

[0029] The intelligent feeding system of the utility model is also used for the process of conveying fresh alumina from the fresh bin to the dust collector of the purification system, but it is coordinated through two related conveying systems, using one set of pneumatic chutes for conveying and the other set in standby status. When a process or equipment in operation fails, the system can interlock and start the standby process and equipment, which is beneficial to ensure uninterrupted material transportation and realize efficient control of the feeding process of the dust collector of the purification system.

[0030] like Figure 2 As shown, the utility model discloses an intelligent feeding system, including two associated conveying systems and a discharge bin 1, the discharge bin 1 is used for temporarily storing a material, for example, the discharge bin 1 is a fresh alumina bin, and the two associated conveying systems include a pneumatic chute Ⅰ5 and a pneumatic chute Ⅱ9.

[0031] In order to realize pneumatic chute conveying, high-pressure centrifugal fan produces high-pressure air which enters the air chamber of the chute section through the air pipe. The high-pressure air in the air chamber enters the material chamber through the air permeable layer as transmission power. The powder in the material chamber of the chute section cannot pass through the air permeable layer. The air pressure in the material chamber can be released through the chute pressure relief device to ensure that there is no air resistance in the material chamber, which is conducive to the boiling of the powder in the material chamber and allows the powder to pass through the material chamber smoothly and quickly.

[0032] The outlet of the feeding pipe Ⅰ2 is provided with a discharge valve Ⅰ4 and connected to the feeding port of the pneumatic chute Ⅰ5. The tail end of the pneumatic chute Ⅰ5 is connected to the discharge pipe Ⅰ6, and the discharge pipe Ⅰ6 is provided with a sensor Ⅰ7; the pneumatic chute Ⅰ5 can be operated alone, for example, the control valve Ⅰ15 and the discharge valve Ⅱ8 are closed, the fan Ⅰ12, the control valve Ⅱ16, and the discharge valve Ⅰ4 are turned on, and the material in the discharge bin 1 enters the pneumatic chute Ⅰ5 through the feeding pipe Ⅰ2 and the discharge valve Ⅰ4, and then is transmitted to the discharge pipe Ⅰ6 at the tail end through the pneumatic chute Ⅰ5. The pneumatic chute Ⅰ5 is powered by a high-pressure air source, which is generally provided by the fan Ⅰ12 and is used for material transmission. The discharge valve Ⅰ4 is used to control the flow rate of the material entering the pneumatic chute Ⅰ5, so that the material enters the pneumatic chute Ⅰ5 evenly, and avoids the material from being stuck due to the large and small size. The discharge valve Ⅰ4 is equipped with a motor and a frequency converter, and the motor is controlled by the frequency converter, which is convenient for remotely adjusting the motor speed according to the needs to achieve the purpose of adjusting the material flow.

[0033] The outlet of the discharge pipe Ⅱ3 is provided with a discharge valve Ⅱ8 and connected to the feed port of the pneumatic chute Ⅱ9. The tail end of the pneumatic chute Ⅱ9 is connected to the discharge pipe Ⅱ10, and the discharge pipe Ⅱ10 is provided with a sensor Ⅱ11. The discharge pipe Ⅰ2 is the main material pipe, and the discharge pipe Ⅱ3 is the spare discharge pipe. The discharge pipe Ⅱ3 is welded to the side of the discharge pipe Ⅰ2. The pneumatic chute Ⅱ9 can be operated alone. For example, the control valve Ⅰ15 and the discharge valve Ⅰ4 are closed, and the fan Ⅱ13, the control valve Ⅲ17, and the discharge valve Ⅱ8 are turned on. The material in the discharge bin 1 enters the pneumatic chute Ⅱ9 through the discharge pipe Ⅱ3 and the discharge valve Ⅱ8, and then is transmitted to the discharge pipe Ⅱ10 at the tail end through the pneumatic chute Ⅱ9. The pneumatic chute Ⅱ9 is powered by a high-pressure wind source, which is generally provided by the fan Ⅱ13 and is used for material transmission. The discharge valve Ⅱ8 is equipped with a motor and a frequency converter. The motor is controlled by the frequency converter, which is convenient for remotely adjusting the motor speed according to needs to achieve the purpose of adjusting the material flow.

[0034] Pneumatic chute I5 and pneumatic chute II9 are composed of at least two chute sections connected in series, and the air supply pipeline is connected to multiple air supply pipe branches or branch pipes. A branch pipe valve 14 is provided on each branch pipe. Each chute section includes a material chamber, a breathable plate and an air chamber at the bottom of the material chamber. The air chamber of each chute section is connected to a branch pipe.

[0035] Sensor Ⅰ7 and sensor Ⅱ11 are contact sensors; discharge valve Ⅰ4, discharge valve Ⅱ8, control valve Ⅰ15, control valve Ⅱ16, control valve Ⅲ17 on the air supply pipeline, sensor Ⅰ7 and sensor Ⅱ11, fan Ⅰ12 and fan Ⅱ13 are all connected to the controller by telecommunication. Of course, discharge valve Ⅰ4 and discharge valve Ⅱ8 can also be connected to the remote host computer respectively; control valve Ⅰ15, control valve Ⅱ16, control valve Ⅲ17 on the air supply pipeline are all connected to the remote host computer through the control method, and the host computer can be a remote control device. Pneumatic chute Ⅰ5 and pneumatic chute Ⅱ9 can be interlocked and switched for operation. For example, close control valve Ⅰ15 and discharge valve Ⅱ8, open fan Ⅰ12, control valve Ⅱ16 and discharge valve Ⅰ4, and the material in discharge bin 1 enters pneumatic chute Ⅰ5 through discharge pipe Ⅰ2 and discharge valve Ⅰ4, and then is transmitted to the discharge pipe Ⅰ6 at the tail end through pneumatic chute Ⅰ5 to complete material transportation. When pneumatic chute Ⅰ5 fails, no material passes through sensor Ⅰ7, and sensor Ⅰ7 transmits the signal to the computer control system, which will interlock and start fan Ⅱ13, control valve Ⅲ17 and discharge valve Ⅱ8 first, and then close discharge valve Ⅰ4, fan Ⅰ12 and control valve Ⅱ16, and automatically complete the process of switching and starting pneumatic chute Ⅱ9 within 3 minutes to avoid environmental accidents caused by material stoppage.

[0036] By opening the control valve Ⅰ15, air can be cross-supplied to the pneumatic chute Ⅰ5 and the pneumatic chute Ⅱ9. For example, when the pneumatic chute Ⅰ5 stops due to the failure of the fan Ⅰ12, the fan Ⅱ13, the control valve Ⅲ17, and the control valve Ⅰ15 can be started, the control valve Ⅱ16 can be closed, and the branch valve of the pneumatic chute Ⅱ9 can be manually closed, and the fan Ⅱ13 can provide a high-pressure air source to the pneumatic chute Ⅰ5 to ensure the normal operation of the pneumatic chute Ⅰ5; similarly, the fan Ⅰ12 can provide a high-pressure air source to the pneumatic chute Ⅱ9 to ensure the normal operation of the pneumatic chute Ⅱ9.

[0037] To ensure safety, the intelligent feeding system also includes a warning light on site. The warning light emits a prompt sound and light when switching to start the standby pneumatic chute. After the switch is completed, the time relay delays 20 seconds to turn off the warning light to prevent on-site staff from operating it incorrectly. The remote control panel of the intelligent feeding system also includes a warning alarm, which is convenient for the on-duty staff in the main control room to find problems in time, use the intercom to contact the on-site staff, find equipment failures, and arrange maintenance.

[0038] The above description is only a preferred feasible embodiment of the present invention and is not intended to limit the scope of the patent application of the present invention. All equivalent changes, equivalent substitutions or modified changes performed within the technical spirit and principles suggested by the present invention should be included in the scope of patent protection covered by the present invention.

Claims

1. An intelligent feeding system, characterized in that: It comprises two pneumatic chute conveying systems, a discharge bin (1), a discharge pipe I (2) and a discharge pipe II (3), wherein the discharge pipe I (2) is connected to one pneumatic chute conveying system, and the discharge pipe II (3) is connected to the other pneumatic chute conveying system; The outlet of the discharge pipe Ⅰ (2) is provided with a discharge valve Ⅰ (4) and is connected to the feed port of the pneumatic chute Ⅰ (5). The tail end of the pneumatic chute Ⅰ (5) is connected to the discharge pipe Ⅰ (6). The discharge pipe Ⅰ (6) is provided with a sensor Ⅰ (7); The outlet of the discharge pipe II (3) is provided with a discharge valve II (8) and is connected to the feed port of the pneumatic chute II (9). The tail end of the pneumatic chute II (9) is connected to the discharge pipe II (10). The discharge pipe II (10) is provided with a sensor II (11); A control valve II (16) is provided on the air supply pipeline of the pneumatic chute I (5) and a branch pipe valve (14) is provided on the branch of the air supply pipeline; the air supply pipelines of the two pneumatic chute conveying systems are connected by a control valve I (15).

2. The intelligent feeding system according to claim 1, characterized in that: The air supply pipeline of the pneumatic chute II (9) is provided with a control valve III (17), and the control valve I (15) is connected to the control valve II (16) and one end of the outlet of the control valve III (17).

3. The intelligent feeding system according to claim 1, characterized in that: The feed pipe I (2) is the main feed pipe, and the feed pipe II (3) is a spare feed pipe. The feed pipe II (3) is welded to the side of the feed pipe I (2).

4. The intelligent feeding system according to claim 1, characterized in that: The pneumatic chute I (5) and the pneumatic chute II (9) are both formed by at least two chute sections connected in series; each chute section includes a material chamber, a breathable plate and an air chamber at the bottom of the material chamber, and the air chamber of each chute section is respectively connected to a branch pipe; the branch pipe is connected to the air supply pipeline, and a branch pipe valve (14) is respectively provided on each branch pipe.

5. The intelligent feeding system according to claim 1, characterized in that: The discharge valve I (4) and the discharge valve II (8) are both equipped with motors and frequency converters; the control valve I (15), the control valve II (16), and the control valve III (17) on the air supply pipeline are all pneumatic butterfly valves; and the branch pipe valve (14) is a manual butterfly valve.

6. The intelligent feeding system according to claim 5, characterized in that: The branch pipe valve (14) remains in a normally open state.

7. The intelligent feeding system according to claim 1, characterized in that: The sensor I (7) and sensor II (11) are contact sensors.

8. The intelligent feeding system according to claim 1, characterized in that: The air supply pipelines of the two pneumatic chute conveying systems provide high-pressure air through fan I (12) and fan II (13) respectively.

9. The intelligent feeding system according to claim 8, characterized in that: The fan I (12) and the fan II (13) are high-pressure centrifugal fans.

10. The intelligent feeding system according to claim 8, characterized in that: The discharge valve I (4), the discharge valve II (8), the control valve I (15), the control valve II (16), the control valve III (17), the sensor I (7), the sensor II (11), the fan I (12) and the fan II (13) are all connected to the controller by telecommunication.

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