Secondary aluminum ash denitrification treatment equipment

Abstract

The utility model provides secondary aluminum ash denitrification treatment equipment. The secondary aluminum ash denitrification treatment equipment comprises a grinding device, a slurry pipeline, a gas-liquid separator and a gas collecting pipeline, the slurry pipeline is provided with a slurry inlet end and a slurry outlet end, and the slurry inlet end and the slurry outlet end are both communicated with the grinding device; the gas-liquid separator is arranged on the slurry pipeline and is used for separating gas generated by hydrolysis reaction of the secondary aluminum ash and water; and the gas collecting pipeline is communicated with the gas-liquid separator and is used for collecting gas generated by hydrolysis reaction of the secondary aluminum ash and water. According to the method, wrapping layers on the surfaces of aluminum nitride particles are stripped through the grinding effect, the hydrolysis reaction is continuously and efficiently carried out, the particle size of slurry particles can gradually become smaller in the grinding process, rapid proceeding of the hydrolysis reaction is better facilitated, gas is collected into a gas collecting pipeline in time, the reaction can be carried out in the forward direction, and the reaction efficiency is improved. The decomposition rate of aluminum nitride in the secondary aluminum ash is greatly improved, and the reaction time is shortened.

Description

Technical Field

[0001] The invention relates to the field of aluminum ash treatment, and in particular to secondary aluminum ash denitrification treatment equipment. Background Art

[0002] Aluminum ash is a kind of slag produced in the production process of electrolytic aluminum and recycled aluminum. It is produced in all processes of aluminum production, application and recycling. The aluminum ash produced by smelting aluminum and aluminum alloys is generally called primary aluminum ash. Since primary aluminum ash often contains more than 50% of metallic aluminum, factories generally recover metallic aluminum by frying or ball milling. The aluminum ash remaining after extracting metallic aluminum is called secondary aluminum ash. After the secondary aluminum ash has been recycled for one or more times, the aluminum content is very low and the utilization value is low. It mainly contains aluminum oxide, aluminum nitride, aluminum carbide, a small amount of metallic aluminum, iron silicon magnesium oxide, chloride, fluoride, etc. Since aluminum ash contains a small amount of chloride and fluoride that are soluble in water, it is very easy to react in humid air to generate toxic, harmful, explosive and smelly gases; when secondary aluminum ash is piled up or landfilled, it will cause pollution of water resources, atmosphere and soil, and have a serious impact on the environment. Therefore, aluminum ash is identified as a harmful, highly flammable and irritating substance, a hazardous waste, and must be harmlessly treated.

[0003] The harmless treatment of secondary aluminum ash mainly removes harmful components in aluminum ash, mainly denitrification, fluorine fixation, and salt removal, so that the produced products meet the corresponding national or industry product quality standards. At present, the harmless treatment of secondary aluminum ash can be divided into wet treatment and dry calcination. For example, the hydrolysis method, that is, the water washing method, is used to remove nitrogen and fluorine in aluminum ash. However, they all face the problem that the ammonia nitrogen removal rate of the hydrolysis method under natural conditions is low, and the nitrogen removal rate is limited to about 50%. This is mainly because the hydrated aluminum oxide forms a coating on the aluminum nitride particles during the hydrolysis process, making the hydrolysis reaction unable to continue, and the reaction time is long and incomplete.

[0004] Therefore, the prior art has defects and needs to be improved and developed. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a secondary aluminum ash denitrification treatment equipment is provided, aiming to solve the problems in the prior art that the hydrated aluminum oxide forms a wrap around the aluminum nitride particles during the hydrolysis process, making the hydrolysis reaction unable to proceed continuously, and the deamination time is long and incomplete.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0007] The first embodiment of the present application provides a secondary aluminum ash denitrification treatment device, which includes:

[0008] A grinding device, the grinding device is used to grind a slurry formed by mixing secondary aluminum ash and water;

[0009] A slurry pipeline, the slurry pipeline having a slurry inlet end and a slurry outlet end, the slurry inlet end and the slurry outlet end are both connected to the grinding device, and the slurry pipeline is used to transport the ground slurry and the gas generated by the hydrolysis reaction of secondary aluminum ash and water;

[0010] A gas-liquid separator, arranged on the slurry pipeline, for separating the gas generated by the hydrolysis reaction of secondary aluminum ash and water;

[0011] And a gas collecting pipeline is connected with the gas-liquid separator, and the gas collecting pipeline is used to collect the gas generated by the hydrolysis reaction of secondary aluminum ash and water.

[0012] In an implementation of the present invention, a heater is further provided on the slurry pipeline, and the heater is used to heat the slurry in the slurry pipeline.

[0013] In one implementation of the present invention, the grinding device is a continuous ball mill, and a hollow slurry inlet tube is provided at the center of one end of the cylinder of the continuous ball mill, and a hollow slurry outlet tube is provided at the center of the other end of the cylinder; the slurry inlet end of the slurry pipe is connected to the hollow slurry outlet tube, and the slurry outlet end of the slurry pipe is connected to the hollow slurry inlet tube.

[0014] In one implementation of the present invention, the secondary aluminum ash denitrification treatment equipment also includes a belt conveyor and a feeding belt scale arranged on the belt conveyor. A feed inlet is opened on the cylinder of the continuous ball mill, and the belt conveyor is arranged above the feed inlet.

[0015] In one implementation of the present invention, a slurry discharge port is also provided on the cylinder of the continuous ball mill.

[0016] In one implementation of the present invention, the secondary aluminum ash denitrification treatment equipment also includes a water supply pipeline, and the water supply pipeline is connected to the grinding device.

[0017] In an implementation of the present invention, a flow meter is provided on the water supply pipeline, and the flow meter is used to measure the amount of water added.

[0018] In one implementation of the present invention, a slurry pump and a control valve are also provided on the slurry pipeline.

[0019] In one implementation of the present invention, the grinding device is filled with grinding media, and the grinding media are corundum beads or zirconium oxide beads.

[0020] The invention discloses a secondary aluminum ash denitrification treatment equipment, the secondary aluminum ash denitrification treatment equipment comprises: a grinding device, the grinding device is used to grind the slurry formed by mixing the secondary aluminum ash and water; a slurry pipeline, the slurry pipeline has a slurry inlet end and a slurry outlet end, the slurry inlet end and the slurry outlet end are both connected to the grinding device, the slurry pipeline is used to transport the ground slurry and the gas generated by the hydrolysis reaction of the secondary aluminum ash and water; a gas-liquid separator is arranged on the slurry pipeline, used to separate the gas generated by the hydrolysis reaction of the secondary aluminum ash and water; and a gas collection pipeline is connected to the gas-liquid separator, the gas collection pipeline is used to collect the gas generated by the hydrolysis reaction of the secondary aluminum ash and water. The present invention uses an external force to strip off the coating layer on the surface of the aluminum nitride particles through the grinding action, so that the hydrolysis reaction is continuously and efficiently carried out, thereby improving the nitrogen removal rate of the aluminum ash hydrolysis method, the nitrogen removal rate is greatly improved, and the particle size of the slurry particles will gradually become finer during the grinding process, which is more conducive to the rapid progress of the hydrolysis reaction. In addition, since the slurry pipeline can transport the ground slurry and the gas generated by the hydrolysis reaction of secondary aluminum ash and water, and the gas is separated by the gas-liquid separator, the gas is collected in time to the gas collection pipeline, so that the reaction can proceed in the forward direction, which greatly improves the decomposition rate of aluminum nitride in the secondary aluminum ash and shortens the reaction time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a preferred embodiment of a secondary aluminum ash denitrification treatment equipment in the present invention.

[0022] Description of reference numerals:

[0023] 100. Grinding device; 110. Hollow slurry inlet pipe; 120. Hollow slurry outlet pipe; 130. Feeding port; 140. Slurry discharge port; 200. Slurry pipeline; 210. Control valve; 300. Gas-liquid separator; 400. Gas collecting pipeline; 500. Heater; 600. Belt conveyor; 610. Feeding belt scale; 700. Water supply pipeline; 710. Flow meter; 800. Slurry pump; 900. Grinding medium. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] At present, when the hydrolysis method is used for harmless treatment of secondary aluminum ash, a water washing method is required to remove nitrogen and fluorine in the aluminum ash. However, under natural conditions, the ammonia nitrogen removal rate of the hydrolysis method is low, and the nitrogen removal rate is limited to about 50%. This is mainly due to the fact that hydrated aluminum oxide forms a coating on the aluminum nitride particles during the hydrolysis process, making the hydrolysis reaction unable to continue, and the reaction time is long and incomplete.

[0026] Therefore, in order to address the defect that the hydrolysis reaction cannot be sustained due to the coating of aluminum nitride particles by hydrated aluminum oxide (A1OOH) in the above-mentioned hydrolysis process, the present invention adds secondary aluminum ash powder and water into a grinding device in a certain proportion. While the aluminum ash undergoes a denitrification and hydrolysis reaction when it meets water, the grinding medium 900 in the grinding device is used to quickly grind the liquid particles. The grinding external force of the grinding medium 900 is used to continuously break and decompose the particle coating coated on the surface of the aluminum nitride, thereby ensuring that water can continue to perform a relatively thorough hydrolysis reaction on the aluminum nitride, generating volatile ammonia, hydrogen, and methane gases for discharge, thereby greatly improving the decomposition rate of aluminum nitride in the aluminum ash, and creating favorable conditions for the full and efficient recycling of the useful components in the secondary aluminum ash in the subsequent process.

[0027] like Figure 1 As shown, a secondary aluminum ash denitrification treatment equipment provided by the present invention includes: a grinding device 100, a slurry pipeline 200, a gas-liquid separator 300 and a gas collecting pipeline 400; the grinding device 100 is used to grind slurry formed by mixing secondary aluminum ash and water; the slurry pipeline 200 has a slurry inlet end and a slurry outlet end, both of which are connected to the grinding device 100, and the slurry pipeline 200 is used to transport the ground slurry and the gas generated by the hydrolysis reaction of secondary aluminum ash and water; the gas-liquid separator 300 is arranged on the slurry pipeline 200, and is used to separate the gas generated by the hydrolysis reaction of secondary aluminum ash and water; the gas collecting pipeline 400 is connected to the gas-liquid separator 300, and the gas collecting pipeline 400 is used to collect the gas generated by the hydrolysis reaction of secondary aluminum ash and water.

[0028] The present invention adds secondary aluminum ash and water into the grinding device 100, and the aluminum ash undergoes hydrolysis reaction when it meets water, generating a large amount of ammonia, a small amount of metal aluminum reacts with water to generate hydrogen, and a small amount of aluminum carbide reacts with water to generate methane. Through the grinding action, the coating layer on the surface of the aluminum nitride particles is stripped off by external force, so that the hydrolysis reaction is continuously and efficiently carried out, thereby improving the nitrogen removal rate of the aluminum ash hydrolysis method, and the nitrogen removal rate is greatly improved. The particle size of the slurry particles will gradually become finer during the grinding process, which is more conducive to the rapid progress of the hydrolysis reaction. In addition, since the slurry pipeline 200 can transport the ground slurry and the gas generated by the hydrolysis reaction of the secondary aluminum ash and water, and is separated by the gas-liquid separator 300, the gas is collected in time to the gas collection pipeline 400, and the gas collection pipeline 400 transports the gas to the gas environmental protection treatment device for unified treatment, so that the reaction can proceed in a positive direction, greatly improving the decomposition rate of aluminum nitride in the secondary aluminum ash, shortening the reaction time, and being able to react thoroughly.

[0029] In one implementation of the present invention, the grinding device 100 is a continuous ball mill, and a hollow slurry inlet tube 110 is provided at the center of one end of the cylinder of the continuous ball mill, and a hollow slurry outlet tube 120 is provided at the center of the other end of the cylinder; the slurry inlet end of the slurry pipe 200 is connected to the hollow slurry outlet tube 120, and the slurry outlet end of the slurry pipe 200 is connected to the hollow slurry inlet tube 110.

[0030] Specifically, in order to enable the slurry in the cylinder to be normally extracted when the cylinder of the ball mill rotates, the present invention adopts a continuous ball mill, the two ends of the cylinder of the continuous ball mill are hollow, and the slurry pipeline 200 can be connected to the inner cavity of the cylinder without affecting the normal rotation of the cylinder. Since the reaction is continuously carried out, the slurry inlet end and the slurry outlet end of the slurry pipeline 200 are both connected to the inner cavity of the cylinder, and the slurry and gas can be continuously extracted during the reaction process to facilitate the collection of gas, and the slurry is continuously transported back to the cylinder to continue the reaction until the reaction is complete.

[0031] In the embodiment of the present application, a heater 500 is further provided on the slurry pipeline 200, and the heater 500 is used to heat the slurry in the slurry pipeline 200 and maintain the reaction temperature in the grinding cylinder.

[0032] Specifically, the slurry in the cylinder of the continuous ball mill is extracted at a certain flow rate. When the slurry flows outward, the gas generated by the reaction in the cylinder will flow out. The extracted slurry is heated by the heater 500 to control the slurry temperature at 50-110°C. After separation by the gas-liquid separator 300, the gas is collected in the gas collection pipeline 400. The gas is extracted from the cylinder and collected and transported to the gas environmental protection treatment device for unified treatment. The slurry after gas-liquid separation is then transported back to the slurry inlet hollow tube 110 of the continuous ball mill and enters the cylinder to continue the grinding and hydrolysis reaction. This cycle is repeated until the set reaction time or the set number of cylinder rotations is reached, that is, the basic reaction of aluminum ash denitrification and hydrolysis is complete, and then the equipment is shut down. Among them, the reaction time is controlled at 6-12 hours, and the heater 500 can be steam, thermal oil or electric heating.

[0033] The embodiment of the present application is provided with a heater 500, and the heated slurry is more conducive to the separation effect of the gas-liquid separator, while the slurry temperature is always maintained within a preset range, which is conducive to the hydrolysis reaction and improves the reaction efficiency.

[0034] In an embodiment of the present application, the secondary aluminum ash denitrification treatment equipment also includes a belt conveyor 600 and a feeding belt scale 610 arranged on the belt conveyor 600. A feed port 130 is opened on the cylinder of the continuous ball mill, and the belt conveyor 600 is arranged above the feed port 130.

[0035] Specifically, after the secondary aluminum ash is ball-milled and screened, the particle size is controlled at 50-150 meshes, and is added into the cylinder of the continuous ball mill from the feed port 130 according to the set addition amount through the batching machine, the belt conveyor 600, and the feeding belt scale 610, and the feed port 130 of the cylinder is closed.

[0036] The embodiment of the present application realizes automatic feeding by setting up a belt conveyor 600, and because the hydrolysis reaction of the present invention requires controlling the amount of addition, a feeding belt scale 610 is used for weighing, which provides a basis for the hydrolysis reaction.

[0037] In one implementation of the present invention, a slurry discharge port 140 is further provided on the cylinder of the continuous ball mill.

[0038] Specifically, after the denitrification and hydrolysis reaction of the aluminum ash in the cylinder is completed, the slurry in the cylinder is released by opening the slurry discharge valve of the ball mill slurry discharge port 140, so that it can be transported to the solid-liquid separation processing device by a pipeline pump for subsequent aluminum oxide recovery processing.

[0039] In one implementation of the present invention, the secondary aluminum ash denitrification treatment equipment also includes a water supply pipeline 700 , and the water supply pipeline 700 is connected to the grinding device 100 .

[0040] Specifically, since the hydrolysis reaction requires the addition of a certain amount of water, the present invention achieves automatic addition of a certain amount of water by providing a water supply pipeline 700, thereby improving the degree of automation of the equipment.

[0041] In the embodiment of the present application, a flow meter 710 is provided on the water supply pipe 700, and the flow meter 710 is used to measure the amount of water added.

[0042] Specifically, a set amount of water is added into the cylinder of the continuous ball mill through the flow meter 710 on the water supply pipeline 700, and the mass ratio of water to secondary aluminum ash is 3 to 10: 1. The embodiment of the present application realizes automatic measurement of the amount of water added by setting the flow meter 710 on the water supply pipeline 700, providing a basis for the hydrolysis reaction.

[0043] In one implementation of the present invention, the slurry pipeline 200 is further provided with a slurry pump 800 and a control valve 210 .

[0044] Specifically, while the grinding equipment is rotating, the control valve 210 of the slurry pipeline 200 is opened, and the slurry pump 800 is started to extract the slurry in the cylinder of the continuous ball mill at a certain flow rate. In the embodiment of the present application, by opening the control valve 210 and continuously extracting gas and slurry from the cylinder using the slurry pump 800, the reaction can proceed in a positive direction, which greatly improves the decomposition rate of aluminum nitride in the secondary aluminum ash and shortens the reaction time.

[0045] In the embodiment of the present application, the grinding device 100 is filled with grinding media 900, and the grinding media 900 is corundum beads or zirconium oxide beads.

[0046] Specifically, a certain amount of grinding media 900 with different particle size ratios is loaded in the cylinder of the continuous ball mill, the grinding media 900 is corundum ball or zirconium oxide ball, the particle size of the grinding media 900 is controlled at Φ2mm~Φ20mm, and the filling rate of the grinding media 900 is controlled at 40%~80%. In this way, while the aluminum ash and water undergo hydrolysis reaction, the cylinder of the continuous ball mill generates a rotational motion under the action of the driving device, driving the grinding media 900 in the cylinder and the slurry particles to grind and collide with each other during the rapid rotation and rolling process. During the grinding process, the grinding media 900 and the inclusions on the surface of the slurry particles will have a wall-breaking and decomposing effect due to mutual collision and friction, so that water can continue to hydrolyze aluminum nitride; at the same time, the particle size of the slurry particles will gradually become finer during the grinding process, which is more conducive to the rapid progress of the hydrolysis reaction.

[0047] The secondary aluminum ash denitrification treatment method implemented by the secondary aluminum ash denitrification treatment equipment of the present invention comprises:

[0048] Adding the secondary aluminum ash to be processed into the grinding device 100, and adding water into the grinding device 100 to form a slurry, wherein the ratio of the secondary aluminum ash to the water is within a preset ratio range;

[0049] The grinding device 100 is turned on, and while the secondary aluminum ash and water undergo a hydrolysis reaction, the grinding media 900 in the grinding device 100 collides and rubs against the inclusions on the surface of the slurry particles under the rotation of the grinding device 100, so as to break and decompose the inclusions on the surface of the slurry particles;

[0050] During the grinding process, the gas and slurry generated by the hydrolysis reaction of the secondary aluminum ash and water enter the slurry pipeline 200, and after being separated by the gas-liquid separator 300, the gas generated by the hydrolysis reaction of the secondary aluminum ash and water is collected into the gas collection pipeline 400;

[0051] The slurry separated by the gas-liquid separator 300 enters the cylinder of the continuous ball mill again until the preset reaction time is reached or the preset cylinder rotation times are reached to obtain the completely reacted slurry.

[0052] In the embodiment of the present application, the secondary aluminum ash denitrification treatment method specifically includes:

[0053] The belt conveyor 600 and the feeding belt scale 610 are used to convey the predetermined amount of secondary aluminum ash to be processed to the feed port 130, into the cylinder of the continuous ball mill, and the valve of the feed port 130 is closed;

[0054] A set amount of water is added into the cylinder of the continuous ball mill through a flow meter 710 on a water supply pipe 700;

[0055] Start the continuous ball mill, and open the control valve 210 and the slurry pump 800 on the slurry pipeline 200;

[0056] While the secondary aluminum ash and water undergo a hydrolysis reaction, driven by the rotation of the grinding device 100, the grinding media 900 in the continuous ball mill collide and rub against the inclusions on the surface of the slurry particles to break and decompose the inclusions on the surface of the slurry particles;

[0057] Under the action of the slurry pump 800, the gas and slurry generated by the hydrolysis reaction between the secondary aluminum ash and water are pumped from the slurry outlet hollow pipe 120 to the slurry pipeline 200;

[0058] The gas generated by the hydrolysis reaction between the secondary aluminum ash and water and the slurry are heated to a preset temperature when flowing through the heater 500. After being separated by the gas-liquid separator 300, the gas enters the gas collection pipe 400; the heated slurry enters the cylinder of the continuous ball mill again through the slurry inlet hollow pipe 110 until the preset reaction time is reached or the preset number of cylinder rotations is reached, and the slurry with complete reaction is obtained;

[0059] The continuous ball mill, the control valve 210 and the slurry pump 800 are closed, and the slurry discharge port 140 on the continuous ball mill is opened to recover the slurry after the reaction is completed.

[0060] Specifically, while the grinding equipment is rotating, the control valves 210 on the slurry inlet and outlet pipes installed at the center holes at both ends of the continuous grinding mill are opened, and the slurry pump 800 is started, and the slurry in the cylinder of the continuous ball mill is extracted from the slurry outlet hollow pipe 120 at a certain flow rate through the slurry pipe 200. The slurry extracted by the slurry pump 800 flows through the heater 500 and is heated to a certain temperature so that the slurry temperature is controlled at 50-110°C. It is separated by the gas-liquid separator 300 and then transported back to the slurry inlet hollow pipe 110 of the continuous ball mill to enter the cylinder to continue the grinding and hydrolysis reaction.

[0061] As the slurry flows outward, the gas generated by the reaction in the cylinder will flow out with it. The gas is extracted from the cylinder, separated by the gas-liquid separator 300, and then collected in the gas collection pipeline 400 for unified treatment by the gas environmental protection treatment device. This cycle is repeated until the set reaction time is reached, which is controlled at 6 to 12 hours, or after the set number of cylinder rotations, the aluminum ash denitrification and hydrolysis reaction is basically complete, and then the slurry pump 800, heater 500, control valve and other devices are shut down.

[0062] The slurry after the denitrification and hydrolysis reaction of the aluminum ash in the cylinder is discharged by opening the discharge valve of the continuous ball mill 140, and is transported to the solid-liquid separation treatment device by a pipeline pump for subsequent aluminum oxide recovery treatment.

[0063] In this way, the secondary aluminum ash denitrification treatment method of the present invention does not require the addition of catalysts, promoters, auxiliary agents, etc., and does not require post-process washing, recovery and processing. It has the advantages of safety, environmental protection, and high nitrogen removal rate.

[0064] The present invention provides a secondary aluminum ash denitrification treatment equipment, the secondary aluminum ash denitrification treatment equipment comprises: a grinding device, the grinding device is used to grind the slurry formed by mixing the secondary aluminum ash and water; a slurry pipeline, the slurry pipeline has a slurry inlet end and a slurry outlet end, the slurry inlet end and the slurry outlet end are both connected to the grinding device, the slurry pipeline is used to transport the ground slurry and the gas generated by the hydrolysis reaction of the secondary aluminum ash and water; a gas-liquid separator is arranged on the slurry pipeline, used to separate the gas generated by the hydrolysis reaction of the secondary aluminum ash and water; and a gas collection pipeline is connected to the gas-liquid separator, the gas collection pipeline is used to collect the gas generated by the hydrolysis reaction of the secondary aluminum ash and water. The present invention uses an external force to strip off the coating layer on the surface of the aluminum nitride particles through the grinding action, so that the hydrolysis reaction is continuously and efficiently carried out, thereby improving the nitrogen removal rate of the aluminum ash hydrolysis method, the nitrogen removal rate is greatly improved, and the particle size of the slurry particles will gradually become finer during the grinding process, which is more conducive to the rapid progress of the hydrolysis reaction. In addition, since the slurry pipeline can transport the ground slurry and the gas generated by the hydrolysis reaction of secondary aluminum ash and water, and the gas is separated by the gas-liquid separator, the gas is collected in time to the gas collection pipeline, so that the reaction can proceed in the forward direction, which greatly improves the decomposition rate of aluminum nitride in the secondary aluminum ash and shortens the reaction time.

[0065] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A secondary aluminum ash denitrification treatment equipment, characterized in that: include: A grinding device, the grinding device is used to grind a slurry formed by mixing secondary aluminum ash and water; A slurry pipeline, the slurry pipeline having a slurry inlet end and a slurry outlet end, the slurry inlet end and the slurry outlet end are both connected to the grinding device, and the slurry pipeline is used to transport the ground slurry and the gas generated by the hydrolysis reaction of secondary aluminum ash and water; A gas-liquid separator, arranged on the slurry pipeline, for separating the gas generated by the hydrolysis reaction of secondary aluminum ash and water; And a gas collecting pipeline is connected with the gas-liquid separator, and the gas collecting pipeline is used to collect the gas generated by the hydrolysis reaction of secondary aluminum ash and water.

2. The secondary aluminum ash denitrification treatment equipment according to claim 1, characterized in that: The slurry pipeline is also provided with a heater, and the heater is used to heat the slurry in the slurry pipeline.

3. The secondary aluminum ash denitrification treatment equipment according to claim 1, characterized in that: The grinding device is a continuous ball mill, a hollow slurry inlet tube is arranged at the center of one end of the cylinder of the continuous ball mill, and a hollow slurry outlet tube is arranged at the center of the other end of the cylinder; the slurry inlet end of the slurry pipeline is connected to the hollow slurry outlet tube, and the slurry outlet end of the slurry pipeline is connected to the hollow slurry inlet tube.

4. The secondary aluminum ash denitrification treatment equipment according to claim 3 is characterized in that: The secondary aluminum ash denitrification treatment equipment also includes a belt conveyor and a feeding belt scale arranged on the belt conveyor. A feed inlet is opened on the cylinder of the continuous ball mill, and the belt conveyor is arranged above the feed inlet.

5. The secondary aluminum ash denitrification treatment equipment according to claim 3, characterized in that: The cylinder of the continuous ball mill is also provided with a slurry discharge port.

6. The secondary aluminum ash denitrification treatment equipment according to claim 1, characterized in that: The secondary aluminum ash denitrification treatment equipment also includes a water supply pipeline, which is connected to the grinding device.

7. The secondary aluminum ash denitrification treatment equipment according to claim 6, characterized in that: The water supply pipeline is provided with a flow meter, and the flow meter is used to measure the amount of water added.

8. The secondary aluminum ash denitrification treatment equipment according to claim 1, characterized in that: The slurry pipeline is also provided with a slurry pump and a control valve.

9. The secondary aluminum ash denitrification treatment equipment according to claim 1, characterized in that: The grinding device is filled with grinding media, and the grinding media are corundum beads or zirconium oxide beads.

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