CN-224226678-U - Low-power consumption decomposer material passing system for alumina production

CN224226678UCN 224226678 UCN224226678 UCN 224226678UCN-224226678-U

Abstract

The utility model discloses a low-power consumption decomposer material passing system for alumina production, which comprises one or more air supply devices, a compressed air storage tank and one or more decomposers which are connected in parallel, wherein the output ends of the air supply devices are communicated with the compressed air storage tank, the output ends of the compressed air storage tank are respectively communicated to the decomposers through air supply pipelines, the air supply devices are low-pressure air supply devices, discharge pipes are arranged in the decomposers, arc-shaped guide plates are arranged at the lower ends of the discharge pipes, the arc-shaped guide plates are wide at the upper parts and narrow at the lower parts, the edges of the arc-shaped guide plates are arc-shaped, the dustpan-shaped special structural types are arranged, the inlets of the arc-shaped guide plates face the material flowing direction in the decomposers, the air supply pipelines are provided with communicated material lifting air pipes, and the end parts of the material lifting air pipes are inserted into the discharge pipes. The utility model can reduce the operation cost and construction investment of the air compression station and the circulating water system matched with the seed decomposition procedure, can effectively reduce the scab at the bottom of the decomposition tank, reduce the difficulty of cleaning the decomposition tank, save the cleaning cost and improve the productivity of the system.

Inventors

LI CHUAN
CHEN GUOHUA
CHEN YUGUO
XIE XIAOQIANG
ZHANG WU
DONGFANG
WANG YANHUI

Assignees

沈阳铝镁设计研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20250423

Claims (7)

1. The low-power consumption decomposer material passing system for alumina production is characterized by comprising one or more air supply devices, a compressed air storage tank and one or more decomposers which are connected in parallel, wherein the output ends of the air supply devices are communicated with the compressed air storage tank, the output ends of the compressed air storage tank are respectively communicated to the decomposers through air supply pipelines, the air supply devices are low-pressure air supply devices, a discharging pipe is arranged in the decomposers, an arc-shaped guide plate is arranged at the lower end of the discharging pipe, the arc-shaped guide plate is of a dustpan-shaped structure, the inlet of the arc-shaped guide plate faces the material flowing direction in the decomposers, a communicated material lifting air pipe is arranged on the air supply pipelines, and the end parts of the material lifting air pipes are inserted into the discharging pipe.
2. The low-power consumption decomposing tank material passing system for alumina production as set forth in claim 1, wherein the dustpan is in the shape of a wide upper part and a narrow upper part, and the edge is in the shape of an arc.
3. The low-power consumption decomposing tank material passing system for alumina production according to claim 1, wherein when a plurality of decomposing tanks are provided, each decomposing tank is communicated in sequence and provided with a height difference.
4. The low-power consumption decomposing tank material passing system for alumina production according to claim 1, wherein the insertion depth of the material lifting air pipe into the decomposing tank discharging pipe is 10-20 m away from the top of the decomposing tank.
5. The low power consumption decomposer feeding system for alumina production of claim 1, wherein the air supply device comprises a high efficiency liquid cooling air suspension blower, an air cooling air suspension blower, a magnetic suspension blower, a Roots blower or a single stage high speed centrifugal blower without a large amount of circulating water and cooling tower system.
6. The low-power consumption decomposing tank material passing system for alumina production as set forth in claim 1, wherein the air supply device provides compressed air with a set pressure in the range of 0.1-0.3 MPa.
7. The low-power consumption decomposing tank material passing system for alumina production according to claim 1, wherein the outlet of the air supply device is sequentially provided with a fan outlet valve and a flowmeter, the air inlet end of the compressed air storage tank is provided with an inlet valve, the air outlet end of the compressed air storage tank is provided with an outlet valve, the top of the compressed air storage tank is provided with a safety valve, the bottom of the compressed air storage tank is provided with a blow-down valve, and the compressed air storage tank is connected with a pressure gauge.

Description

Low-power consumption decomposer material passing system for alumina production Technical Field The utility model relates to the technical field of seed decomposition in alumina production, in particular to a low-power consumption decomposer material passing system for alumina production. Background In the production flow of alumina, a seed decomposition process is one of important processes in alumina production, the seed decomposition process consists of a large number of decomposers connected in series, and the material flow among the decomposers is realized through a discharging pipe in the decomposer and a material passing chute connected outside the decomposer. In order to ensure smooth material passing, a certain height difference is set between the decomposers, a large amount of high-pressure compressed air is still required to be introduced into the discharge pipe in the decomposer through the material lifting air pipe, the aluminum hydroxide slurry in the discharge pipe is diluted by utilizing the communicating vessel principle, local negative pressure is realized, and the materials at the bottom of the decomposer are caused to overflow into the discharge material passing chute at the upper part of the decomposer through the discharge pipe and then automatically flow into the next decomposer through the chute. The conventional decomposer material passing system has the main problems that a large amount of high-pressure compressed air is required to be introduced into a discharge pipe in the decomposer due to large material passing amount of the decomposer, a special high-pressure air compression station and a matched circulating water station are required to be arranged, a plurality of high-pressure screw air compressors, cooling towers and circulating water pumps are usually selected for the air compression station, the equipment operation power consumption is high, the circulating water system causes a large amount of water and heat dissipation, the equipment overhaul and maintenance amount is large, and the high-pressure compressed air is heated due to the fact that the air compressors do work, and the heat of the high-temperature compressed air is brought into the decomposer to cause adverse effects on the seed decomposition system. The conventional decomposer discharging pipe is formed by inserting a lifting air pipe into the decomposer discharging pipe, wherein the insertion depth is 5-10m away from the bottom of the decomposer and is more than 30m away from the top of the decomposer, and the bottom of the discharging pipe is beveled at an angle of 45 degrees. The bottom of the decomposition tank is severely scarred, the height of the groove wall is more than 3m, the cleaning period is short, the cleaning is needed once every 6-10 months, each cleaning time is approximately needed for 10-15 days, the cleaning difficulty is high, and the cleaning cost is high. Disclosure of utility model In view of the above disadvantages and shortcomings, the utility model provides a low-power consumption decomposer material passing system for producing alumina, which adopts a low-pressure air supply device as a decomposer material lifting air source, can effectively reduce the operation cost and construction investment of an air compression station and a circulating water system matched with a seed decomposition procedure through an improved decomposer material discharging pipe, and comprises one or more air supply devices, a compressed air storage tank and one or more decomposers which are connected in parallel, wherein the output end of the air supply device is communicated with the compressed air storage tank, the output end of the compressed air storage tank is respectively communicated with the decomposer through an air supply pipeline, the air supply device is the low-pressure air supply device, the decomposer is internally provided with a material discharging pipe, the lower end of the material discharging pipe is provided with an arc-shaped guide plate, the arc-shaped guide plate is of a material lifting dustpan structure with the upper width and the edge of the arc-shaped guide plate faces the material flowing direction in the decomposer, the air supply pipeline is provided with a communicated material lifting air pipe, and the end of the material lifting air pipe is inserted into the material discharging pipe. When the decomposers are arranged in a plurality, each decomposer is communicated in sequence and provided with a height difference. The insertion depth of the lifting air pipe into the discharge pipe of the decomposer is 10-20 meters away from the top of the decomposer. The air supply device comprises a high-efficiency liquid cooling air suspension blower, an air cooling air suspension blower, a magnetic suspension blower, a Roots blower or a single-stage high-speed centrifugal blower which does not need to be matched with a large amount of circulating water and a cooling tower system. The