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CN-224208015-U - Production system for producing polyaluminium chloride by utilizing aluminum ash

CN224208015UCN 224208015 UCN224208015 UCN 224208015UCN-224208015-U

Abstract

The utility model discloses a production system for producing polyaluminum chloride by utilizing aluminum ash, which comprises a first reaction unit, a second reaction unit and a second filter press, wherein the first reaction unit comprises a first stirring tank and a first filter press, the first stirring tank is used for stirring and reacting the aluminum ash, water and industrial hydrochloric acid after removing impurities through denitrification, the second reaction unit comprises a second stirring tank, a first metering conveyer and a second metering conveyer, the second stirring tank is used for stirring aluminum chloride filtrate output by the first filter press, the first metering conveyer inputs ammonia nitrogen degradation agent into the aluminum chloride filtrate of the second stirring tank, and the second metering conveyer adds calcium aluminate powder into the second stirring tank to enable the aluminum chloride filtrate and the calcium aluminate powder to react into polyaluminum chloride slurry. The production system for producing the polyaluminum chloride by using the aluminum ash can reduce the ammonia nitrogen content of the produced polyaluminum chloride to reach the national standard, and is beneficial to the application of the aluminum ash in the industry of the industrial polyaluminum chloride water purifying agent.

Inventors

  • WANG MINGYONG
  • WU JIAQING
  • ZHANG MINGMEI
  • WANG ZHIJIAN

Assignees

  • 广东省蓝昌环保科技有限公司

Dates

Publication Date
20260508
Application Date
20250515

Claims (10)

  1. 1. A production system for producing polyaluminum chloride by utilizing aluminum ash, which is characterized by comprising: The first reaction unit comprises a first stirring tank (100) and a first filter press (110), wherein the first stirring tank (100) is used for stirring and reacting aluminum ash, water and industrial hydrochloric acid after the impurities are removed by denitrification, and the first filter press (110) is used for carrying out filter pressing on the solution after the stirring and reacting of the first stirring tank (100) and outputting aluminum chloride filtrate; The second reaction unit comprises a second stirring tank (120), a first metering conveyer (130) and a second metering conveyer (140), wherein the second stirring tank (120) is used for stirring the aluminum chloride filtrate output by the first filter press (110), the first metering conveyer (130) inputs an ammonia nitrogen degrading agent into the aluminum chloride filtrate of the second stirring tank (120) to decompose ammonia nitrogen elements in the aluminum chloride filtrate, and the second metering conveyer (140) adds calcium aluminate powder into the aluminum chloride filtrate of the second stirring tank (120) to enable the aluminum chloride filtrate and the calcium aluminate powder to react into polyaluminum chloride slurry; And a second filter press (150) for filtering the polyaluminum chloride slurry outputted from the second stirring tank (120) to precipitate and outputting a polyaluminum chloride liquid.
  2. 2. The production system for producing polyaluminum chloride utilizing aluminum ash according to claim 1, wherein the second reaction unit further comprises a first steam supplier (160), the first steam supplier (160) being configured to input steam to the second agitation tank (120) after the second metering feeder (140) inputs calcium aluminate powder to the second agitation tank (120) to heat an agitation environment of the second agitation tank (120).
  3. 3. The system for producing polyaluminum chloride by utilizing aluminum ash according to claim 1, wherein the ammonia nitrogen degradation agent input into the second stirring tank (120) by the first metering feeder (130) is one or more of hydrogen peroxide, sodium dichloroisocyanurate and sodium hypochlorite.
  4. 4. The production system for producing polyaluminum chloride utilizing aluminum ash according to claim 1, wherein the first reaction unit further comprises a second steam supply (170), the second steam supply (170) being for inputting steam into the first agitation tank (100) to heat the agitation environment of the first agitation tank (100).
  5. 5. The production system for producing polyaluminum chloride utilizing aluminum ash according to claim 1, wherein the first reaction unit further comprises a third metering feeder (180), the third metering feeder (180) being for metering water into the first agitation tank (100).
  6. 6. The production system for producing polyaluminum chloride utilizing aluminum ash according to claim 1, wherein the first reaction unit further comprises a fourth metering feeder (190), the fourth metering feeder (190) being for metering aluminum ash into the first agitation tank (100).
  7. 7. The system for producing polyaluminum chloride utilizing aluminum ash according to claim 6, wherein said fourth metering feeder (190) feeds a fixed amount of aluminum ash to said first agitation tank (100) at a plurality of intervals.
  8. 8. The production system for producing polyaluminum chloride utilizing aluminum ash according to claim 1, wherein the first reaction unit further comprises a fifth metering feeder (200), the fifth metering feeder (200) being for metering in industrial hydrochloric acid to the first stirring tank (100).
  9. 9. The system for producing polyaluminum chloride utilizing aluminum ash according to claim 8, wherein said fifth metering feeder (200) inputs quantitative industrial hydrochloric acid into said first stirring tank (100) at intervals of a plurality of times with respect to aluminum ash and aqueous solution.
  10. 10. The production system for producing polyaluminum chloride utilizing aluminum ash according to claim 1, wherein the first reaction unit further comprises a fourth metering feeder (190), a fifth metering feeder (200) and a sixth metering feeder, and the fourth metering feeder (190), the fifth metering feeder (200) and the sixth metering feeder sequentially meter water, aluminum ash and industrial hydrochloric acid into the first stirring tank (100).

Description

Production system for producing polyaluminium chloride by utilizing aluminum ash Technical Field The utility model relates to the technical field of aluminum ash processing, in particular to a production system for producing polyaluminum chloride by utilizing aluminum ash. Background A large amount of dangerous waste aluminum ash is generated in the processes of casting and aluminum electrolysis in the aluminum profile production, and the aluminum ash contains metal aluminum, aluminum oxide, aluminum nitride and other impurities. The aluminum oxide is used as an important raw material for producing the polyaluminium chloride as a water purifying agent, and aluminum ash is used for producing the polyaluminium chloride in the water purifying agent industry, and the specific method comprises the following steps of 1, directly reacting the aluminum ash with industrial hydrochloric acid to produce a polyaluminium chloride solution (commonly called basic aluminum chloride); and 3, eluting aluminum ash water to remove part of nitrogen, then reacting with industrial hydrochloric acid to produce aluminum chloride solution, and then producing polyaluminum chloride according to a two-step method. However, the existing method for producing polyaluminum chloride by using aluminum ash has high ammonia nitrogen content of polyaluminum chloride, so that the aluminum ash is limited in use in the industry of polyaluminum chloride water purifying agents. Disclosure of utility model The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a production system for producing polyaluminium chloride by using aluminum ash, which can reduce the ammonia nitrogen content of the produced polyaluminium chloride to reach the national standard and is beneficial to the application of the aluminum ash in the industry of the industrial polyaluminium chloride water purifying agent. According to an embodiment of the utility model, a production system for producing polyaluminum chloride by using aluminum ash comprises: The first reaction unit comprises a first stirring tank and a first filter press, wherein the first stirring tank is used for stirring and reacting aluminum ash, water and industrial hydrochloric acid after the impurities are removed by denitrification, and the first filter press is used for carrying out filter pressing on the solution after the stirring and reacting in the first stirring tank and outputting aluminum chloride filtrate; The second reaction unit comprises a second stirring tank, a first metering conveyer and a second metering conveyer, wherein the second stirring tank is used for stirring the aluminum chloride filtrate output by the first filter press, the first metering conveyer inputs an ammonia nitrogen degradation agent into the aluminum chloride filtrate of the second stirring tank to decompose ammonia nitrogen elements in the aluminum chloride filtrate, and the second metering conveyer adds calcium aluminate powder into the aluminum chloride filtrate of the second stirring tank to enable the aluminum chloride filtrate and the calcium aluminate powder to react into polyaluminum chloride slurry; and the second filter press is used for filtering the polyaluminum chloride slurry output by the second stirring tank to obtain precipitate and outputting polyaluminum chloride liquid. The production system for producing the polyaluminum chloride by utilizing the aluminum ash has at least the following beneficial effects: 1. according to the utility model, by arranging the first reaction unit and the second reaction unit, the two-stage reaction unit is realized to convert the aluminum ash after the impurities are removed by denitrification into the high value-added product polyaluminum chloride, so that the pollution of solid waste is reduced. 2. According to the utility model, impurities and precipitates are removed step by combining the first filter press with the second filter press, so that the purity of the polyaluminum chloride liquid is obviously improved. 3. According to the utility model, the first metering conveyer and the second metering conveyer are arranged, the first metering conveyer inputs ammonia nitrogen degrading agent into the aluminum chloride filtrate of the second stirring tank to decompose ammonia nitrogen elements in the aluminum chloride filtrate, the second metering conveyer adds calcium aluminate powder into the aluminum chloride filtrate of the second stirring tank to enable the aluminum chloride filtrate and the calcium aluminate powder to react into polyaluminum chloride slurry, the ammonia nitrogen elements in the aluminum chloride filtrate are decomposed by adopting the ammonia nitrogen degrading agent, the ammonia nitrogen elements in the aluminum chloride filtrate are efficiently decomposed, the generation of harmful byproducts is reduced, the ammonia nitrogen content of the produced polyaluminum chlo