Production process and equipment of water purifying agent for paint spraying sewage treatment

Abstract

The invention provides a production process and equipment of a water purifying agent for paint spraying sewage treatment. The production process of the water purifying agent for paint spraying sewage treatment comprises the following steps: S1, sodium bentonite pretreatment: microwave-ultrasonic combined activation: putting 100-200-mesh sodium bentonite into a microwave reactor, irradiating for 10 minutes at the frequency of 2.45 GHz, and synchronously applying ultrasonic waves to break agglomeration; s2, preparing mixed powder; s3, slurry preparation and dispersion; s4, performing superfine grinding; s5, function strengthening and curing; and S6, packaging a finished product. The production technology and equipment of the water purifying agent for paint spraying sewage treatment have the advantages of being low in cost, high in paint spraying sewage treatment efficiency and capable of achieving double breakthrough of the adsorption capacity of the water purifying agent and the stability of auxiliaries.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a production process and equipment for a water purifying agent used in spray paint sewage treatment. Background Art

[0002] In the treatment of spray paint sewage, most of the currently used water purifying agents are polyaluminum chloride and anionic polyacrylamide. Since polyaluminum chloride is an inorganic flocculant containing aluminum salts, and the spray paint sewage contains high levels of COD and heavy metals, after long-term use of these two agents to treat spray paint sewage, the aluminum salt content and COD in the sewage will increase. The treated sewage cannot be recycled for a long time and cannot meet the discharge standards. Moreover, due to the high viscosity of spray paint sewage, the paint sludge has a high water content and sinks to the bottom of the pool. If plate and frame pressure filtration is used, it is very easy to block the filter cloth, which is extremely inconvenient during use and difficult to maintain.

[0003] In the prior art, the treatment method for spray paint sewage has low efficiency and high cost.

[0004] Therefore, it is necessary to provide a new production process and equipment for a water purifying agent used in spray paint sewage treatment to solve the above technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a production process and equipment for a water purifying agent used in spray paint sewage treatment, which has a lower cost, higher efficiency in treating spray paint sewage, and can achieve a double breakthrough in the adsorption capacity of the water purifying agent and the stability of the auxiliary agent.

[0006] To solve the above technical problems, the production process of the water purifying agent used in spray paint sewage treatment provided by the present invention includes the following steps:

[0007] S1: Pretreatment of sodium-based bentonite:

[0008] Microwave-ultrasonic combined activation: Put 100-200 mesh sodium-based bentonite into a microwave reactor, irradiate it at a frequency of 2.45 GHz for 10 minutes, and simultaneously apply ultrasonic waves to break up agglomerates;

[0009] S2: Preparation of mixed powder:

[0010] Dry powder gradient mixing: Put 23 kg of pretreated bentonite, 5 kg of magnesium aluminum silicate, and 0.5 kg of hydroxyethyl cellulose into a three-dimensional mixer; add 0.1 kg of polyethylene glycol diglycidyl ether in 3 times, with an interval of 5 minutes each time; mix for 30 minutes until uniform;

[0011] S3: Preparation and dispersion of slurry:

[0012] High-pressure jet dispersion: Inject 871.4 kg of tap water into the high-pressure jet stirring tank; input the mixed powder at a rate of 10 kg / min, and simultaneously turn on the jet nozzle; circulate and disperse for 15 minutes;

[0013] S4: Ultrafine grinding:

[0014] Nanoscale gradient grinding: The slurry is first roughly ground to 400 mesh by a vertical mill; then enters a nanoscale sand mill for fine grinding to D50 = 500 nm; finally, it is processed by a jet mill to obtain a nanoscale bentonite slurry with a specific surface area ≥ 300 m 2 / g;

[0015] S5: Function enhancement and aging:

[0016] Dynamic temperature-controlled aging: Transfer the ground slurry to a constant-temperature stirring tank; slowly add the potassium sorbate solution; stir at 50 rpm for 30 minutes, and then let it stand for 48 hours;

[0017] S6: Finished product packaging:

[0018] Fully automatic nitrogen protection filling: Use a PE plastic barrel to fill on a sterile filling line, fill with nitrogen, and store in a cool warehouse at 25°C after sealing.

[0019] Preferably, in S1, the interlayer spacing of the bentonite expands from 1.2 nm to 1.8 nm, and the cation exchange capacity ≥ 110 meq / 100 g.

[0020] Preferably, in S2, the rotation speed of the three-dimensional mixer is 15 rpm, and the mixing accuracy is ±0.5%.

[0021] Preferably, in S3, the jet speed of the high-pressure jet stirring tank is 200 m / s, the flow rate of the circulation pump is 5 m 3 / h, and the pressure of the jet nozzle is 10 MPa.

[0022] Preferably, in S4, the main roll pressure of the vertical mill is 12 MPa, and the rotation speed of the classification wheel is 3500 rpm; the linear speed of the nanoscale sand mill is 18 m / s, and the cooling water temperature ≤ 25°C; the pressure of the jet mill is 0.8 MPa, and the classification accuracy ≤ 1 μm.

[0023] Preferably, in S5, the temperature of the constant-temperature stirring tank is 25°C, and the potassium sorbate solution is made of 0.1 kg of potassium sorbate dissolved in 100 kg of water.

[0024] The present invention also provides a production device for a water purifying agent used in spray painting sewage treatment, including a microwave reactor, a three-dimensional mixer, a high-pressure jet stirring tank, a vertical mill, a nano sand mill, an air flow crusher, a constant temperature stirring tank, and a sterile filling line. The constant temperature stirring tank includes a tank body. A support frame is fixedly installed above the tank body. A stirring mechanism is fixedly installed on the support frame. The bottom end of the stirring mechanism extends into the tank body. A heat preservation cavity is formed in the tank body. A heat preservation layer is provided in the heat preservation cavity. A constant temperature mechanism is provided in the heat preservation cavity. A plurality of temperature sensors are provided in the tank body. The bottom ends of the plurality of temperature sensors are respectively located at different horizontal positions. A feed hopper is provided at the top of the tank body. A discharge pipe is fixedly installed on one side of the tank body. A discharge valve is fixedly installed on the discharge pipe.

[0025] Preferably, the stirring mechanism includes a motor fixedly installed on the support frame and a stirring shaft rotatably installed in the tank body. The top end of the stirring shaft extends above the tank body and is fixedly connected to the output shaft of the motor. A plurality of stirring blades are fixedly installed on the stirring shaft. The stirring blades are located in the tank body.

[0026] Preferably, the constant temperature mechanism includes a heating wire fixedly installed in the heat preservation cavity. Distilled water is provided in the heat preservation cavity.

[0027] Preferably, a water circulation pipe is provided outside the tank body. Both ends of the water circulation pipe are communicated with the inside of the tank body. A circulation pump is fixedly installed on the water circulation pipe.

[0028] Compared with the related art, the production process and device for the water purifying agent used in spray painting sewage treatment provided by the present invention have the following beneficial effects:

[0029] The present invention provides a production process and device for a water purifying agent used in spray painting sewage treatment. By adopting microwave-ultrasonic combined pretreatment of bentonite, the interlayer cation exchange capacity and micropore openness are improved, and the adsorption efficiency is increased by 40%; through the series connection of a high-energy nano sand mill and an air flow crusher, precise control of the particle fineness from 100 mesh to 500 mesh and then to the nano level is achieved; an in-situ cross-linking agent is introduced in the preparation of the water purifying agent to enhance the binding force between cellulose and bentonite, and the suspension stability is increased by 50%; by adding a trace amount of boric acid to form a stable complex with potassium alum, the hydrolysis of polyacrylamide is inhibited, and the storage period is extended to 3 years. Through material modification and process intensification, double breakthroughs in the adsorption capacity of the water purifying agent and the stability of the additives can be achieved, and an efficient and low-cost solution for spray painting sewage treatment can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a process flow chart of the production of the water purifying agent used in spray painting sewage treatment provided by the present invention;

[0031] Figure 2It is a schematic structural diagram of a constant-temperature stirring tank in a production device for a water purifying agent used in spray-painting sewage treatment provided by the present invention;

[0032] Figure 3 It is Figure 2 the sectional structural schematic diagram shown.

[0033] The reference numerals in the figure: 1, tank body; 2, support frame; 3, motor; 4, stirring shaft; 5, stirring blade; 6, mounting seat; 7, discharge pipe; 8, discharge valve; 9, heat preservation cavity; 10, heat preservation layer; 11, heating wire; 12, water circulation pipe; 13, circulation pump; 14, temperature sensor; 15, feed hopper. Specific implementation manners

[0034] The present invention will be further described below in conjunction with the accompanying drawings and implementation manners.

[0035] Please refer to Figure 1 , Figure 2 and Figure 3 , wherein, Figure 1 it is a process flow chart of the production process of the water purifying agent used in spray-painting sewage treatment provided by the present invention; Figure 2 it is a schematic structural diagram of a constant-temperature stirring tank in a production device for a water purifying agent used in spray-painting sewage treatment provided by the present invention; Figure 3 It is Figure 2 the sectional structural schematic diagram shown. The production process of the water purifying agent used in spray-painting sewage treatment includes the following steps:

[0036] S1: Pretreatment of sodium-based bentonite:

[0037] Microwave-ultrasonic combined activation: Put 100-200 mesh sodium-based bentonite into a microwave reactor, irradiate it at a frequency of 2.45 GHz for 10 minutes, and simultaneously apply ultrasonic waves to break up agglomerates;

[0038] S2: Preparation of mixed powder:

[0039] Dry powder gradient mixing: Put 23 kg of pretreated bentonite, 5 kg of magnesium aluminum silicate, and 0.5 kg of hydroxyethyl cellulose into a three-dimensional mixer; Add 0.1 kg of polyethylene glycol diglycidyl ether in 3 times, with an interval of 5 minutes each time; Mix for 30 minutes until uniform;

[0040] S3: Preparation and dispersion of slurry:

[0041] High-pressure jet dispersion: Inject 871.4 kg of tap water into a high-pressure jet stirring tank; Put the mixed powder into it at a rate of 10 kg / min, and simultaneously turn on the jet nozzle; Circulate and disperse for 15 minutes;

[0042] S4: Ultrafine grinding:

[0043] Nanoscale gradient grinding: The slurry is first coarsely ground to 400 mesh by a vertical mill; then it enters a nanoscale sand mill for fine grinding to D50 = 500 nm; finally, it is processed by a jet mill to obtain a nanoscale bentonite slurry with a specific surface area ≥ 300 m 2 / g;

[0044] S5: Functional enhancement and ripening:

[0045] Dynamic temperature-controlled ripening: Transfer the ground slurry to a constant-temperature stirring tank; slowly add a potassium sorbate solution; stir at 50 rpm for 30 minutes and then let it stand for 48 hours;

[0046] S6: Finished product packaging:

[0047] Fully automatic nitrogen-protected filling: Use a PE plastic barrel to fill on a sterile filling line, fill with nitrogen, and store in a cool warehouse at 25°C after sealing.

[0048] In the above S1, the interlayer spacing of the bentonite expands from 1.2 nm to 1.8 nm, and the cation exchange capacity ≥ 110 meq / 100 g.

[0049] In the above S2, the rotation speed of the three-dimensional mixer is 15 rpm, and the mixing accuracy is ±0.5%.

[0050] In the above S3, the jet speed of the high-pressure jet stirring tank is 200 m / s, the flow rate of the circulation pump is 5 m 3 / h, and the pressure of the jet nozzle is 10 MPa.

[0051] In the above S4, the main roll pressure of the vertical mill is 12 MPa, the rotation speed of the classifier wheel is 3500 rpm; the linear speed of the nanoscale sand mill is 18 m / s, and the cooling water temperature ≤ 25°C; the pressure of the jet mill is 0.8 MPa, and the classification accuracy ≤ 1 μm.

[0052] In the above S5, the temperature of the constant-temperature stirring tank is 25°C, and the potassium sorbate solution is made by dissolving 0.1 kg of potassium sorbate in 100 kg of water.

[0053] The present invention also provides an additive production process, including the following steps:

[0054] T1: Polyacrylamide synergistic dissolution:

[0055] Low-temperature vortex dissolution:

[0056] Precool 982 kg of pure water to 10°C and then inject it into the vortex stirring tank;

[0057] Slowly add 2 kg of cationic polyacrylamide (ionicity 30), and maintain the stirring speed at 100 rpm; after dissolving for 3 hours, raise the temperature to 25°C;

[0058] T2: Chelation stabilization treatment:

[0059] Stepwise chelation reaction:

[0060] Premix 16 kg of potassium alum with 0.02 kg of boric acid; add the auxiliary agent solution in 5 portions at intervals of 10 minutes; stir for 2 hours and then stand still for 12 hours;

[0061] T3: Finished product packaging:

[0062] Sterile filling: Fill in a clean room environment, and place a desiccant in the barrel in advance.

[0063] The present invention also provides a production device for a water purifying agent for treating spray painting sewage, including a microwave reactor, a three-dimensional mixer, a high-pressure jet stirring tank, a vertical mill, a nano sand mill, a jet mill, a constant temperature stirring tank and a sterile filling line. The constant temperature stirring tank includes a tank body 1, a support frame 2 is fixedly installed above the tank body 1, a stirring mechanism is fixedly installed on the support frame 2, the bottom end of the stirring mechanism extends into the tank body 1, a heat preservation cavity 9 is opened in the tank body 1, a heat preservation layer 10 is arranged in the heat preservation cavity 9, a constant temperature mechanism is arranged in the heat preservation cavity 9, a plurality of temperature sensors 14 are arranged in the tank body 1, and the bottom ends of the plurality of temperature sensors 14 are located at different horizontal positions respectively. A feed hopper 15 is arranged at the top of the tank body 1, a discharge pipe 7 is fixedly installed on one side of the tank body 1, and a discharge valve 8 is fixedly installed on the discharge pipe 7.

[0064] The stirring mechanism includes a motor 3 fixedly installed on the support frame 2 and a stirring shaft 4 rotatably installed in the tank body 1. An installation seat 6 is fixedly installed at the top of the tank body 1, the stirring shaft 4 is rotatably installed on the installation seat 6, the top end of the stirring shaft 4 extends above the tank body 1 and is fixedly connected with the output shaft of the motor 3, and a plurality of stirring blades 5 are fixedly installed on the stirring shaft 4, and the stirring blades 5 are located in the tank body 1.

[0065] The constant temperature mechanism includes a heating wire 11 fixedly installed in the heat preservation cavity 9, and distilled water is arranged in the heat preservation cavity 9.

[0066] A water circulation pipe 12 is arranged outside the tank body 1, both ends of the water circulation pipe 12 are communicated with the inside of the tank body 1, and a circulation pump 13 is fixedly installed on the water circulation pipe 12.

[0067] Through the constant temperature stirring tank composed of the tank body 1, the support frame 2, the motor 3, the stirring shaft 4, the stirring blades 5, the installation seat 6, the discharge pipe 7, the discharge valve 8, the heat preservation cavity 9, the heat preservation layer 10, the heating wire 11, the water circulation pipe 12, the circulation pump 13, the temperature sensors 14 and the feed hopper 15, the temperature uniformity in the tank body 1 can be improved, so as to ensure the quality and efficiency of dynamic temperature control and ripening.

[0068] Compared with the related technologies, the production process and equipment of the water purifying agent for spray paint sewage treatment provided by the present invention have the following beneficial effects:

[0069] The present invention provides a production process and equipment of a water purifying agent for spray paint sewage treatment. By adopting microwave-ultrasonic combined pretreatment of bentonite, the interlayer cation exchange capacity and micropore openness are improved, and the adsorption efficiency is increased by 40%; by connecting a high-energy nano sand mill and an air flow crusher in series, precise control of the particle fineness from 100 mesh to 500 mesh and then to the nano level is achieved; an in-situ crosslinking agent is introduced in the preparation of the water purifying agent to enhance the binding force between cellulose and bentonite, and the suspension stability is increased by 50%; by adding a trace amount of boric acid to form a stable complex with potassium alum, the hydrolysis of polyacrylamide is inhibited, and the storage period is extended to 3 years. Through material modification and process intensification, double breakthroughs in the adsorption capacity of the water purifying agent and the stability of the additives can be achieved, and an efficient and low-cost solution for spray paint sewage treatment can be provided.

[0070] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A production process of a water purifier for painting wastewater treatment, characterized in that: The following steps are involved: S1: Sodium bentonite pretreatment: Microwave-ultrasound combined activation: 100-200 mesh sodium bentonite is placed in a microwave reactor, irradiated at a frequency of 2.45 GHz for 10 minutes, and ultrasonic waves are simultaneously applied to break up agglomerates; S2: Mixed powder preparation: Dry powder gradient mixing: put 23kg of pretreated bentonite, 5kg of magnesium aluminum silicate, and 0.5kg of hydroxyethyl cellulose into a three-dimensional mixer; add 0.1kg of polyethylene glycol diglycidyl ether in 3 times, with an interval of 5 minutes each time; mix for 30 minutes until uniform; S3: Slurry preparation and dispersion: High-pressure jet dispersion: Take 871.4 kg of tap water and inject it into the high-pressure jet mixing tank; add the mixed powder at a rate of 10 kg / min and open the jet nozzle simultaneously; circulate and disperse for 15 minutes; S4: Ultrafine grinding: Nano-grade gradient grinding: The slurry is first coarsely ground to 400 mesh by a vertical mill; then finely ground to D50 = 500nm by a nano sand mill; finally processed by a jet mill to obtain a specific surface area ≥ 300m 2 / g of nano-bentonite slurry; S5: Functional enhancement and maturation: Dynamic temperature control aging: transfer the ground slurry to a constant temperature stirring tank; slowly add potassium sorbate solution; stir at 50 rpm for 30 minutes, and then let it stand for 48 hours; S6: Finished product packaging: Fully automatic nitrogen protection filling: Use PE plastic barrels to fill on the aseptic filling line, fill with nitrogen, and store in a cool warehouse at 25℃ after sealing.

2. The production process of a water purifier for painting wastewater treatment according to claim 1, characterized in that: In the S1, the interlayer distance of bentonite is extended from 1.2 nm to 1.8 nm, and the cation exchange capacity is ≥110 meq / 100 g.

3. The production process of a water purifier for painting wastewater treatment according to claim 1, characterized in that: In S2, the rotation speed of the three-dimensional mixer is 15 rpm, and the mixing accuracy is ±0.5%.

4. The production process of a water purifier for painting wastewater treatment according to claim 1, characterized in that: In S3, the jet velocity of the high-pressure jet stirring tank is 200m / s, and the flow rate of the circulating pump is 5m 3 / h, the pressure of the jet nozzle is 10MPa.

5. The production process of a water purifier for painting wastewater treatment according to claim 1, characterized in that: In S4, the main roller pressure of the vertical mill is 12 MPa, and the rotating speed of the classifying wheel is 3500 rpm; the linear speed of the nano sand mill is 18 m / s, and the cooling water temperature is ≤25° C.; the pressure of the air flow mill is 0.8 MPa, and the classification accuracy is ≤1 μm.

6. The production process of a water purifier for painting wastewater treatment according to claim 1, characterized in that: In S5, the temperature of the thermostatic stirring tank is 25°C, and the potassium sorbate solution is prepared by dissolving 0.1 kg of potassium sorbate in 100 kg of water.

7. A production equipment for a water purifier for painting wastewater treatment, used for the production process of a water purifier for painting wastewater treatment as claimed in claim 1, comprising a microwave reactor, a three-dimensional mixer, a high-pressure jet stirring tank, a vertical mill, a nano sand mill, a jet mill, a constant temperature stirring tank and an aseptic filling line, characterized in that: The constant temperature stirring tank includes a tank body, a support frame is fixedly installed on the top of the tank body, a stirring mechanism is fixedly installed on the support frame, the bottom end of the stirring mechanism extends into the tank body, a heat preservation cavity is opened in the tank body, a heat preservation layer is provided in the heat preservation cavity, a constant temperature mechanism is provided in the heat preservation cavity, a plurality of temperature sensors are provided in the tank body, the bottom ends of the plurality of temperature sensors are respectively located at different horizontal positions, a feed hopper is provided on the top of the tank body, a discharge pipe is fixedly installed on one side of the tank body, and a discharge valve is fixedly installed on the discharge pipe.

8. The production equipment of water purifier for paint spraying wastewater treatment according to claim 7, characterized in that: The stirring mechanism includes a motor fixedly mounted on the support frame and a stirring shaft rotatably mounted in the tank body, the top end of the stirring shaft extends to the top of the tank body and is fixedly connected to the output shaft of the motor, and a plurality of stirring blades are fixedly mounted on the stirring shaft, and the stirring blades are located in the tank body.

9. The production equipment of water purifier for paint spraying wastewater treatment according to claim 7, characterized in that: The constant temperature mechanism comprises a heating wire fixedly installed in the heat preservation cavity, and distilled water is arranged in the heat preservation cavity.

10. The production equipment of water purifier for painting wastewater treatment according to claim 7, characterized in that: A water circulation pipe is arranged outside the tank body, both ends of the water circulation pipe are connected with the inside of the tank body, and a circulation pump is fixedly installed on the water circulation pipe.

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