A method for the preparation of a lightweight water treatment particulate material

Abstract

The application discloses a preparation method of light water treatment granular material, and belongs to the field of water pollution purification material. The light water treatment granular material is prepared through preparation of titanium-zinc-calcium sol and granular shaping process, and the granular material has the characteristics of low density, rich porosity and stable structure, and is suitable for purifying and treating organic contaminated wastewater. Meanwhile, the granular material has a large adsorption capacity for organic pollutants in wastewater, and can spontaneously decompose the adsorbed organic pollutants, so that the granular material can not only quickly remove the organic pollutants from the wastewater, but also has a self-purification capacity, and is suitable for long-term stable and large-scale wastewater treatment process.

Description

Technical Field

[0001] This invention belongs to the field of water pollution purification materials and is a method for preparing lightweight water treatment granular materials. Background Technology

[0002] Organic pollutants are the main components of wastewater. Commonly used wastewater treatment methods include adsorption, sedimentation, and biological methods, which require targeted treatment based on the characteristics of the pollutants in the wastewater. For toxic and harmful organic pollutants, conventional biological treatment technologies have significant limitations because microorganisms have low activity in such wastewater.

[0003] Adsorption is a common method for purifying organic wastewater, with the adsorbent playing a crucial role. Although commonly used adsorbents can purify organic wastewater through adsorption, they cannot spontaneously remove adsorbed substances after reaching adsorption saturation. Therefore, saturated adsorbents must be regenerated. This regeneration process is often cumbersome and cannot guarantee the adsorption capacity of the regenerated adsorbent. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention aims to provide a method for preparing a lightweight water treatment particulate material, which can be used to purify organic pollutants in water.

[0005] The technical solution adopted in this invention is:

[0006] A method for preparing a lightweight water treatment granular material includes the following process steps:

[0007] Step 1: Preparation of titanium zinc calcium sol

[0008] (1) Add 0.022mol~0.026mol of tetrabutyl titanate and 0.5g~0.6g of Tween 60 to 170mL of ethanol and stir to form solution A;

[0009] (2) Add zinc chloride and calcium chloride to 35 mL of pure water and stir to form solution B;

[0010] (3) Mix solution A and solution B and stir evenly to obtain titanium zinc calcium sol;

[0011] Step 2: Particle shaping

[0012] (1) Add 20g of fly ash to the above titanium zinc calcium sol and stir thoroughly to form a suspension;

[0013] (2) Place the above suspension in a 65°C rotary evaporator and evaporate the solvent until the mass content of solids in the system is 75%~80%, forming a viscous fly ash mud lump;

[0014] (3) Feed the fly ash mud into an extruder and extrude it into strip-shaped granules through a die;

[0015] (4) Dry the strip-shaped particles at 80℃~90℃ for 8h~11h, and then calcine them at 720℃~770℃ for 3h to obtain lightweight water treatment granular material.

[0016] Furthermore, in the titanium-zinc-calcium sol, the atomic ratio of zinc to calcium is 1:1, and the total number of atomic moles of zinc and calcium is equal to the number of atomic moles of titanium.

[0017] Furthermore, the fly ash particles have a particle size range of 100μm to 200μm and a porosity of 60%.

[0018] Furthermore, the strip-shaped particles have a diameter of 2mm to 3mm and a length of 5mm to 8mm.

[0019] The method for preparing lightweight water treatment granular materials of the present invention has the following advantages compared with the prior art:

[0020] This invention prepares lightweight water treatment granular materials through a titanium-zinc-calcium sol preparation and particle shaping process. The granular materials prepared by this invention are characterized by low density, abundant porosity, and stable structure, making them suitable for purifying organic pollutant wastewater. The granular materials exhibit a large adsorption capacity for organic pollutants in the wastewater and can spontaneously decompose the adsorbed organic pollutants. Therefore, these granular materials not only rapidly remove organic pollutants from wastewater but also possess self-purification capabilities, making them suitable for long-term, stable, and large-scale wastewater treatment processes. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Operating methods not specifically specified in the following embodiments are generally performed under conventional conditions or as recommended by the manufacturer.

[0022] Example 1

[0023] A method for preparing a lightweight water treatment granular material includes the following process steps:

[0024] Step 1: Preparation of titanium zinc calcium sol

[0025] (1) Add 0.022 mol of tetrabutyl titanate and 0.5 g of Tween 60 to 170 mL of ethanol and stir to form solution A;

[0026] (2) Add 0.011 mol zinc chloride and 0.011 mol calcium chloride to 35 mL of pure water and stir to form solution B;

[0027] (3) Mix solution A and solution B and stir evenly to obtain titanium zinc calcium sol.

[0028] Step 2: Particle shaping

[0029] (1) Add 20g of fly ash with a particle size of 100μm~200μm and a porosity of 60% to the above titanium zinc calcium sol and stir thoroughly to form a suspension;

[0030] (2) Place the above suspension in a 65°C rotary evaporator and evaporate the solvent until the mass content of solids in the system is 75%, forming a viscous fly ash mud lump;

[0031] (3) Feed the fly ash mud into an extruder and extrude it into strip-shaped granules through a die;

[0032] (4) The strip-shaped particles are dried at 80°C for 11 hours and then calcined at 720°C for 3 hours to obtain lightweight water treatment granular material.

[0033] Example 2

[0034] A method for preparing a lightweight water treatment granular material includes the following process steps:

[0035] Step 1: Preparation of titanium zinc calcium sol

[0036] (1) Add 0.022 mol of tetrabutyl titanate and 0.52 g of Tween 60 to 170 mL of ethanol and stir to form solution A;

[0037] (2) Add 0.011 mol zinc chloride and 0.011 mol calcium chloride to 35 mL of pure water and stir to form solution B;

[0038] (3) Mix solution A and solution B and stir evenly to obtain titanium zinc calcium sol.

[0039] Step 2: Particle shaping

[0040] (1) Add 20g of fly ash with a particle size of 100μm~200μm and a porosity of 60% to the above titanium zinc calcium sol and stir thoroughly to form a suspension;

[0041] (2) Place the above suspension in a rotary evaporator at 65°C and evaporate the solvent until the mass content of solids in the system is 77%, forming a viscous fly ash mud lump;

[0042] (3) Feed the fly ash mud into an extruder and extrude it into strip-shaped granules through a die;

[0043] (4) Dry the strip-shaped particles at 85℃ for 10 hours and then calcine them at 730℃ for 3 hours to obtain lightweight water treatment granular material.

[0044] Example 3

[0045] A method for preparing a lightweight water treatment granular material includes the following process steps:

[0046] Step 1: Preparation of titanium zinc calcium sol

[0047] (1) Add 0.024 mol of tetrabutyl titanate and 0.55 g of Tween 60 to 170 mL of ethanol and stir to form solution A;

[0048] (2) Add 0.012 mol zinc chloride and 0.012 mol calcium chloride to 35 mL of pure water and stir to form solution B;

[0049] (3) Mix solution A and solution B and stir evenly to obtain titanium zinc calcium sol.

[0050] Step 2: Particle shaping

[0051] (1) Add 20g of fly ash with a particle size of 100μm~200μm and a porosity of 60% to the above titanium zinc calcium sol and stir thoroughly to form a suspension;

[0052] (2) Place the above suspension in a 65°C rotary evaporator and evaporate the solvent until the mass content of solids in the system is 76%, forming a viscous fly ash mud lump;

[0053] (3) Feed the fly ash mud into an extruder and extrude it into strip-shaped granules through a die;

[0054] (4) Dry the strip-shaped particles at 85°C for 9 hours and then calcine them at 750°C for 3 hours to obtain lightweight water treatment granular material.

[0055] Example 4

[0056] A method for preparing a lightweight water treatment granular material includes the following process steps:

[0057] Step 1: Preparation of titanium zinc calcium sol

[0058] (1) Add 0.026 mol of tetrabutyl titanate and 0.58 g of Tween 60 to 170 mL of ethanol and stir to form solution A;

[0059] (2) Add 0.013 mol zinc chloride and 0.013 mol calcium chloride to 35 mL of pure water and stir to form solution B;

[0060] (3) Mix solution A and solution B and stir evenly to obtain titanium zinc calcium sol.

[0061] Step 2: Particle shaping

[0062] (1) Add 20g of fly ash with a particle size of 100μm~200μm and a porosity of 60% to the above titanium zinc calcium sol and stir thoroughly to form a suspension;

[0063] (2) Place the above suspension in a 65°C rotary evaporator and evaporate the solvent until the mass content of solids in the system is 76%, forming a viscous fly ash mud lump;

[0064] (3) Feed the fly ash mud into an extruder and extrude it into strip-shaped granules through a die;

[0065] (4) The strip-shaped particles are dried at 88℃ for 9 hours and then calcined at 760℃ for 3 hours to obtain lightweight water treatment granular material.

[0066] Example 5

[0067] A method for preparing a lightweight water treatment granular material includes the following process steps:

[0068] Step 1: Preparation of titanium zinc calcium sol

[0069] (1) Add 0.026 mol of tetrabutyl titanate and 0.6 g of Tween 60 to 170 mL of ethanol and stir to form solution A;

[0070] (2) Add 0.013 mol zinc chloride and 0.013 mol calcium chloride to 35 mL of pure water and stir to form solution B;

[0071] (3) Mix solution A and solution B and stir evenly to obtain titanium zinc calcium sol.

[0072] Step 2: Particle shaping

[0073] (1) Add 20g of fly ash with a particle size of 100μm~200μm and a porosity of 60% to the above titanium zinc calcium sol and stir thoroughly to form a suspension;

[0074] (2) Place the above suspension in a 65°C rotary evaporator and evaporate the solvent until the mass content of solids in the system is 80%, forming a viscous fly ash mud lump.

[0075] (3) Feed the fly ash mud into an extruder and extrude it into strip-shaped granules through a die;

[0076] (4) Dry the strip-shaped particles at 90°C for 8 hours and then calcine them at 770°C for 3 hours to obtain lightweight water treatment granular material.

[0077] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A process for the preparation of a lightweight water treatment particulate material, characterised in that, The process includes the following steps: Step 1: Preparation of titanium zinc calcium sol (1) Add 0.022mol~0.026mol of tetrabutyl titanate and 0.5g~0.6g of Tween 60 to 170mL of ethanol and stir to form solution A; (2) Add zinc chloride and calcium chloride to 35 mL of pure water and stir to form solution B; (3) Mix solution A and solution B and stir evenly to obtain titanium zinc calcium sol; Step 2: Particle shaping (1) Add 20g of fly ash to the above titanium zinc calcium sol and stir thoroughly to form a suspension; (2) Place the above suspension in a 65°C rotary evaporator and evaporate the solvent until the mass content of solids in the system is 75%~80%, forming a viscous fly ash mud lump; (3) Feed the fly ash mud into an extruder and extrude it into strip-shaped granules through a die; (4) Dry the strip-shaped particles at 80℃~90℃ for 8h~11h, and then calcine them at 720℃~770℃ for 3h to obtain lightweight water treatment granular material.

2. The method for preparing a lightweight water treatment granular material according to claim 1, characterized in that, In the titanium-zinc-calcium sol, the atomic ratio of zinc to calcium is 1:1, and the total number of molar atoms of zinc and calcium is equal to the number of molar atoms of titanium.

3. The method for preparing a lightweight water treatment granular material according to claim 1, characterized in that, The fly ash particles have a particle size range of 100μm to 200μm and a porosity of 60%.

4. The method for preparing a lightweight water treatment granular material according to claim 1, characterized in that, The strip-shaped particles have a diameter of 2mm to 3mm and a length of 5mm to 8mm.