CN111792813B - Ceramic sludge treatment method - Google Patents
Ceramic sludge treatment method Download PDFInfo
- Publication number
- CN111792813B CN111792813B CN202010745939.6A CN202010745939A CN111792813B CN 111792813 B CN111792813 B CN 111792813B CN 202010745939 A CN202010745939 A CN 202010745939A CN 111792813 B CN111792813 B CN 111792813B
- Authority
- CN
- China
- Prior art keywords
- ceramic
- ceramic sludge
- sludge
- treatment
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
- C02F11/131—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating using electromagnetic or ultrasonic waves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention discloses a ceramic sludge treatment method, which comprises the following steps: step S1, flocculating and precipitating: adding a flocculating agent into the ceramic sludge, stirring and mixing, standing for a moment, and flocculating and precipitating; step S2, primary dehydration: preliminarily dehydrating the ceramic sludge after the flocculation precipitation; s3, crushing: crushing the dehydrated ceramic sludge by a crusher, and sieving by a vibrating screen machine to obtain fine-particle ceramic sludge powder; step S4, adding an oxidant: adding an oxidant into the ceramic sludge powder, stirring and uniformly mixing; s5, destroying and deeply dehydrating the flocculating agent: conveying the ceramic sludge powder mixed with the oxidant into a drying channel for heating and drying, and performing ultrasonic treatment and microwave treatment in the drying channel to obtain ceramic micro powder after treatment. The ceramic sludge treatment method provided by the invention can realize deep dehydration of the ceramic sludge and degradation of the polymeric flocculant, and the obtained ceramic micro powder has low water content, good dispersibility and higher utilization value.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a ceramic sludge treatment method.
Background
The ceramic sludge is sludge produced in the polishing process in the ceramic production process, and mainly comprises ceramic micro powder, grinding aid and water, wherein the main components of the ceramic micro powder are silicon dioxide and silicon carbide, the ceramic micro powder in the ceramic sludge has the characteristics of small particle size and high hardness, and the treated ceramic sludge can be used as fine aggregate of building materials or can be made into a surface layer material of high-quality permeable building blocks. However, in the prior art, due to the limitation of the treatment process, the ceramic polishing sludge is directly landfilled after being flocculated, dehydrated and dried, and the utilization value is low. There have also been attempts to use the treated ceramic sludge as a building material, such as for making concrete blocks. However, the ceramic sludge after being treated is easy to harden due to the lagging of the ceramic polishing sludge treatment process, has high water content and a flocculating agent, and has the following defects when being used as a building material: 1. because the water content of the treated ceramic sludge is still close to 40%, when the treated ceramic sludge is used for manufacturing building blocks, the water content in the ceramic sludge can increase the water-cement ratio of concrete, so that the strength of the building blocks is low; 2. when the massive hardened ceramic sludge is directly used for manufacturing building materials, the massive sludge can form a mechanical weak point in the building materials, so that the strength of the building blocks is low; 3. the dehydrated ceramic sludge contains a polymeric flocculant which can generate adverse effects on the hydration of cement, so that the early strength of the concrete block is poor, and the mechanical properties of a concrete product are finally affected.
It is seen that improvements and enhancements in the prior art are needed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a ceramic sludge treatment method, and aims to overcome the defects that deep dehydration cannot be realized and the utilization value of ceramic sludge is not high in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a ceramic sludge treatment process, wherein the process comprises the steps of:
step S1, flocculating and precipitating: adding a flocculating agent into the ceramic sludge, stirring and mixing, standing for a moment, and flocculating and precipitating;
step S2, primary dehydration: preliminarily dehydrating the ceramic sludge subjected to flocculation precipitation;
s3, crushing: crushing the dehydrated ceramic sludge by a crusher, and sieving by a vibrating screen machine to obtain fine-particle ceramic sludge powder;
s4, adding an oxidant: adding an oxidant into the ceramic sludge powder, stirring and uniformly mixing;
s5, destroying and deeply dehydrating the flocculating agent: conveying the ceramic sludge powder mixed with the oxidant into a drying channel for heating and drying, and performing ultrasonic treatment and microwave treatment in the drying channel to obtain ceramic micro powder after treatment.
In the ceramic sludge treatment method, in the step S5, the microwave treatment is provided after the ultrasonic treatment.
In the ceramic sludge treatment method, in the step S5, the frequency of ultrasonic treatment is 20 KHz-120 KHz.
In the ceramic sludge treatment method, in the step S5, the frequency of the microwave treatment is 915 MHz-2450 MHz.
In the ceramic sludge treatment method, in the step S5, the heating and drying is hot air drying, and the temperature of the hot air drying is 60-120 ℃.
In the ceramic sludge treatment method, in the step S1, the addition amount of the flocculating agent is 0.5-3% of the solid content of the ceramic sludge.
In the ceramic sludge treatment method, in the step S1, the flocculant includes one of polyacrylamide, sodium polyacrylate, polyvinyl pyridinium and polyethyleneimine.
In the ceramic sludge treatment method, in the step S4, the oxidizing agent includes one of ferric chloride, ferric sulfate, potassium ferrate, and sodium peroxodisulfate.
In the ceramic sludge treatment method, in the step S4, the addition amount of the oxidant is 1-6% of the solid content of the ceramic sludge.
In the ceramic sludge treatment method, in the step S2, the preliminary dehydration is performed by one of a plate and frame filter press or a stacked screw type sludge dehydrator.
Has the advantages that:
the invention provides a ceramic sludge treatment method, which comprises the steps of flocculation, preliminary dehydration, crushing, oxidant addition, flocculant destruction and deep dehydration, and realizes dehydration, drying, lump breaking and dispersion of ceramic sludge and degradation of a polymeric flocculant, so that ceramic micro powder with low water content and good dispersibility is obtained, and the utilization value of the ceramic sludge is improved. In the steps of destroying the flocculating agent and deeply dewatering, under the combined action of ultrasonic waves, microwaves, oxidants and hot air, the flocculating agent is rapidly degraded and broken into short-chain molecules, on one hand, the aggregation structure of the ceramic sludge is destroyed, so that gap water and combined water in the ceramic sludge are easier to evaporate, and the deep dewatering efficiency is improved. The method can deeply dehydrate the ceramic sludge, and the obtained ceramic particles have low water content, good dispersibility and higher application value.
Detailed Description
The present invention provides a method for treating ceramic sludge, which is described in further detail below with reference to examples in order to make the objects, technical solutions and effects of the present invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A method of ceramic sludge treatment, the method comprising the steps of:
step S1, flocculating and precipitating: adding a flocculating agent into the ceramic sludge according to a certain proportion, stirring and mixing, and standing for a moment to flocculate and precipitate the ceramic sludge. The flocculant comprises one of polyacrylamide, sodium polyacrylate, polyvinyl pyridinium and polyethyleneimine, and is an organic polymeric flocculant, preferably a cationic organic polymeric flocculant, such as cationic polyacrylamide. The organic polymeric flocculant has longer molecular chains, is activated before use, and has better effect. The flocculant activating method comprises the steps of mixing the flocculant and a diluent according to a ratio, then stirring at a high speed, and opening a molecular chain of the flocculant through the friction force in a system to activate the flocculant. In the activating process of the flocculating agent, the better the flocculant molecular chain is unfolded, the better the activating effect is, the more obvious the flocculating and precipitating effect on the ceramic sludge is, the less the addition amount of the flocculating agent is, the lower the difficulty in subsequently removing the flocculating agent is, and the better the dispersing effect of the ceramic micro powder is.
Specifically, the addition amount of the flocculating agent is 0.5-3% of the weight of the ceramic sludge. The addition amount of the flocculant directly influences the effect of flocculation and precipitation, and the more the addition amount is, the better the flocculation effect is. However, the addition amount is too large, so that the hardening of the primarily dehydrated ceramic sludge is more obvious, the subsequent crushing and deep dehydration are further difficult, the difficulty of removing the subsequent flocculant is increased, and the cost of water treatment is increased. When the addition amount of the flocculating agent is 0.5-3% of the solid content of the ceramic sludge, the flocculating agent has a good flocculating effect, and the hardening degree is relatively weak.
Step S2, primary dehydration: and primarily dehydrating the ceramic sludge subjected to flocculation precipitation. The preliminary dehydration can be performed by adopting a plate and frame filter press or a stacked screw type sludge dehydrator, and the water content of the ceramic sludge after the preliminary dehydration is 30-60%. The preferable method is to dewater by a plate and frame filter press, mainly because the pressure of the plate and frame filter press dewaterer is large, and the water content of dewatered mud cakes can reach 30-45 percent.
S3, crushing: and (3) crushing the preliminarily dehydrated ceramic sludge by a crusher, and sieving by a sieving machine to obtain fine-particle ceramic sludge powder. The hardened ceramic sludge is difficult to deeply dehydrate and dry and is not suitable for removing a flocculating agent because the hardened ceramic sludge is hardened after primary dehydration, so the hardened ceramic sludge needs to be crushed. The hardened ceramic sludge blocks are crushed by a crusher and then screened by a vibrating screen, the screened material enters the next process step through a conveying pipeline, and the screened material returns to the crusher to be crushed again.
S4, adding an oxidant: adding oxidant dry powder into the ceramic sludge powder after the vibrating screen, and then fully stirring and uniformly mixing the mixture by a stirrer. The surface of the screened ceramic sludge powder is still coated with the flocculating agent and the water, so the ceramic sludge powder is still easy to agglomerate, the added dry oxidant powder can participate in the subsequent destruction of the molecular chain of the flocculating agent, the dispersibility of the ceramic sludge powder is improved, and the flocculating agent is convenient to release water after being destroyed, so the deep dehydration effect is improved. The oxidant comprises ferric chloride, ferric sulfate, potassium ferrate and sodium peroxodisulfate, and the oxidant can react with the flocculant to break the long-chain flocculant molecules, so that the coating effect of the flocculant is damaged. When the addition amount of the oxidant is 1-6% of the solid content of the ceramic sludge, the oxidation effect is better.
S5, destroying and deeply dehydrating the flocculating agent: and conveying the ceramic sludge powder mixed with the oxidant into a drying channel through a conveying channel, heating and drying, and treating by ultrasonic waves and microwaves to obtain the ceramic sludge micro powder. The drying channel is a closed channel, the bottom of the drying channel is provided with a conveying belt for conveying ceramic sludge powder, two ends of the drying channel are respectively provided with a hot air inlet and a hot air outlet, and the ceramic sludge powder is heated and dried by inputting hot air into the drying channel; the side wall of the drying channel is provided with an ultrasonic transducer and a microwave generator, the ultrasonic transducer can emit ultrasonic waves, the microwave generator can emit microwaves, and the ultrasonic waves and the microwaves can accelerate oxidation and chain breakage of the flocculating agent and accelerate removal of moisture.
Specifically, the frequency of the ultrasonic wave is 20 KHz-120 KHz, the ultrasonic wave has a cavitation effect, a mechanical effect, a thermal effect and a chemical effect, and the cavitation effect and the chemical effect can improve the generation rate of free radicals, accelerate the rate of oxidation reaction and promote the degradation of a flocculating agent; the mechanical effect can greatly accelerate the permeation of gap water and combined water in the ceramic sludge powder, and the water removal efficiency is improved; the thermal effect can quickly heat up each component in the ceramic sludge, accelerate the movement of water molecules and promote the oxidative degradation of the flocculating agent. Furthermore, the ultrasonic wave and the oxidant have synergistic effect, so that the oxidation reaction of the flocculant is greatly accelerated, the long-chain high-molecular flocculant is oxidized into short-chain organic matters, the agglomerated ceramic sludge group is disintegrated, the dispersity of the ceramic sludge particles is improved, and when the flocculant is a cationic flocculant, such as cationic polyacrylamide, broken short-chain molecules or monomers of the flocculant are charged and adsorbed on the ceramic particles to enable the ceramic particles to be charged with the same charge, so that the acting force between the ceramic sludge particles and water molecules is reduced, and the gap water and the combined water among the ceramic particles are facilitated to be evaporated more easily.
Specifically, the frequency of the microwave treatment is 915 MHz-2450 MHz. The microwave emitted by the microwave generator can generate a heat effect, and the heat effect can heat the water and the flocculating agent, accelerate the evaporation of the water and the oxidation reaction of the flocculating agent, and play a role in deep dehydration and flocculant molecule damage.
Furthermore, the ultrasonic waves, the microwaves, the oxidant and the flowing hot air cooperate, the microwaves, the ultrasonic waves and the hot air can heat the moisture in the ceramic sludge, the molecular motion of the ceramic sludge is accelerated, the ceramic sludge is quickly separated from the ceramic sludge, and the flowing hot air can bring the moisture in time, so that the removal of the moisture is further promoted; meanwhile, the degradation and chain scission of the flocculating agent are accelerated under the synergistic action of the ultrasonic waves, the microwaves and the oxidizing agent, so that the ceramic sludge particles are dispersed, the evaporation of water is facilitated, and the flocculating agent short-chain molecules or monomers after oxidative degradation are adsorbed on the surface of the ceramic and are mutually repelled due to the fact that the flocculating agent short-chain molecules or monomers carry the same charges, so that the ceramic sludge particles are dispersed. Therefore, under the multiple actions of ultrasonic waves, oxidizing agents, microwave radiation and hot air drying, the ceramic sludge particles are rapidly dried and mutually dispersed.
Preferably, the microwave treatment is provided after the ultrasonic treatment. The front 2/3 section of the drying channel is provided with an ultrasonic transducer, the rear 2/3 section of the drying channel is provided with a microwave generator, the ceramic sludge powder has higher moisture content when just entering the drying channel, and the effect of the ultrasonic on the water-containing medium is better than that of the medium with low moisture content, so that the ultrasonic is arranged at the front end of the drying channel with higher moisture content, and the microwave generator is arranged at the rear end with lower moisture content, mainly aiming at reducing energy consumption and improving microwave efficiency, and the overall energy consumption is reduced while the drying effect is ensured.
Specifically, the temperature of the hot air drying is 60-120 ℃, the hot air can directly utilize the hot air discharged by the ceramic kiln, the utilization of the ceramic processing waste heat is realized, and the energy conservation and the environmental protection are realized. The hot air enters in the direction opposite to the advancing direction of the conveying belt, and the drying effect is better.
After the ceramic sludge is treated by the method, the ceramic particles with low water content, small particle size and good dispersibility can be obtained, and the particles can be used as building fillers for concrete, building blocks or other decorative materials, so that the ceramic sludge is utilized with higher value.
Example 1
A preferred ceramic sludge treatment process, comprising the steps of:
s1, adding a cationic polyacrylamide flocculant into the ceramic sludge, wherein the addition amount of the flocculant is 1.2% of the solid content of the ceramic sludge, stirring and mixing, and standing for 10min to fully flocculate and precipitate the ceramic sludge;
s2, primarily dehydrating the ceramic sludge subjected to flocculation precipitation through a plate and frame filter press to obtain a ceramic sludge block, wherein the water content of the dehydrated ceramic sludge block is 30%;
s3, crushing the dehydrated ceramic sludge block by a crusher, and sieving the crushed sludge block by a vibrating screen machine to obtain fine-particle ceramic sludge powder;
s4, adding the ceramic sludge into a stirrer, simultaneously adding ferric chloride dry powder, wherein the adding amount of the ferric chloride dry powder is 2% of the solid content of the ceramic sludge, stirring and uniformly mixing;
and S5, conveying the ceramic sludge powder mixed with the oxidant dry powder into a drying channel for heating and drying, and simultaneously carrying out ultrasonic wave and microwave treatment, wherein the hot air temperature is 105 ℃, the air speed is 3m/s, the ultrasonic frequency is 85KHz, the microwave frequency is 2100MHz, the length of the drying channel is 10m, and the conveying belt speed is 2m/min, so as to obtain the ceramic sludge micro powder after treatment.
The ceramic sludge micro-powder particles obtained after the treatment by the method in the embodiment have the particle size of 10-200 microns, the average particle size of 21 microns and the water content of 8%.
Example 2
A ceramic sludge treatment method, which is the same as example 1 except that preliminary dehydration is performed by a stacked screw type sludge dehydrator in step S2. The grain diameter of the ceramic micro powder particles obtained after treatment is 85-1200 mu m, the average grain diameter is 139 mu m, and the water content is 21%.
Example 3
A ceramic sludge treatment process comprising the steps of:
s1, adding a sodium polyacrylate flocculant into ceramic sludge, wherein the addition amount of the flocculant is 0.5 percent of the solid content of the ceramic sludge, stirring and mixing, and standing for 15min to fully flocculate and precipitate the ceramic sludge;
s2, dehydrating the ceramic sludge subjected to flocculation precipitation through a plate and frame filter press for preliminary dehydration to obtain a ceramic sludge block;
s3, crushing the dehydrated ceramic sludge block by a crusher, and sieving the crushed sludge block by a vibrating screen machine to obtain fine-particle ceramic sludge powder;
s4, adding the ceramic sludge into a stirrer, and simultaneously adding ferric sulfate dry powder, wherein the adding amount of the ferric sulfate dry powder is 1% of the solid content of the ceramic sludge, stirring, and uniformly mixing;
and S5, conveying the ceramic sludge powder mixed with the oxidant dry powder into a drying channel for heating and drying, and simultaneously carrying out ultrasonic wave and microwave treatment, wherein the hot air temperature is 120 ℃, the air speed is 2m/s, the ultrasonic frequency is 20KHz, the microwave frequency is 915MHz, the length of the drying channel is 10m, and the conveying belt speed is 1.5m/min, so as to obtain the ceramic sludge micro powder after treatment.
The ceramic sludge micro-powder particles obtained after the treatment by the method in the embodiment have the particle size of 20-480 mu m, the average particle size of 35 mu m and the water content of 12 percent.
Example 4
A ceramic sludge treatment process comprising the steps of:
s1, adding a cationic polyvinyl pyridinium flocculant into the ceramic sludge, wherein the addition amount of the flocculant is 3% of the solid content of the ceramic sludge, stirring and mixing, and standing for 10min to fully flocculate and precipitate the ceramic sludge;
s2, preliminarily dehydrating the ceramic sludge subjected to flocculation precipitation by using a screw-stacked sludge dehydrator to obtain ceramic sludge blocks;
s3, crushing the dehydrated ceramic sludge block by a crusher, and sieving the crushed sludge block by a vibrating screen machine to obtain fine-particle ceramic sludge powder;
s4, adding the ceramic sludge into a stirrer, simultaneously adding potassium ferrate dry powder, wherein the addition amount of the potassium ferrate dry powder is 6% of the solid content of the ceramic sludge, stirring and uniformly mixing;
and S5, conveying the ceramic sludge powder mixed with the oxidant dry powder into a drying channel for heating and drying, and simultaneously carrying out ultrasonic wave and microwave treatment, wherein the hot air temperature is 60 ℃, the air speed is 4m/s, the ultrasonic frequency is 120KHz, the microwave frequency is 2450MHz, the length of the drying channel is 10m, the conveying belt speed is 2m/min, and the ceramic sludge micro powder is obtained after treatment.
The ceramic sludge micro-powder particles obtained after the treatment by the method in the embodiment have the particle size of 25-420 microns, the average particle size of 38 microns and the water content of 11%.
Example 5
A method of ceramic sludge treatment, the method comprising the steps of:
s1, adding a cationic polyethyleneimine flocculating agent into ceramic sludge, wherein the addition amount of the flocculating agent is 2% of the solid content of the ceramic sludge, stirring and mixing, and standing for 12min to fully flocculate and precipitate the ceramic sludge;
s2, preliminarily dehydrating the ceramic sludge subjected to flocculation precipitation by using a screw-stacked sludge dehydrator to obtain ceramic sludge blocks;
s3, crushing the dehydrated ceramic sludge block by a crusher, and sieving the crushed sludge block by a vibrating screen machine to obtain fine-particle ceramic sludge powder;
s4, adding the ceramic sludge into a stirrer, simultaneously adding sodium peroxodisulfate dry powder, wherein the addition amount of the sodium peroxodisulfate dry powder is 4% of the solid content of the ceramic sludge, stirring, and uniformly mixing;
and S5, conveying the ceramic sludge powder mixed with the oxidant dry powder into a drying channel for heating and drying, and simultaneously carrying out ultrasonic wave and microwave treatment, wherein the hot air temperature is 85 ℃, the air speed is 3m/s, the ultrasonic frequency is 90KHz, the microwave frequency is 1500MHz, the length of the drying channel is 10m, the conveying belt speed is 2m/min, and the ceramic sludge micro powder is obtained after treatment.
The ceramic sludge micro-powder particles obtained after treatment by the method in the embodiment have the particle size of 22-330 microns, the average particle size of 31 microns and the water content of 10%.
Comparative example 1
A ceramic sludge treatment method has the same steps 1-3 as the embodiment 1, and the specific steps are shown in the embodiment 1, and other steps are as follows:
and S4, conveying the ceramic sludge powder obtained in the step 3 into a drying channel for heating and drying, and simultaneously carrying out ultrasonic wave and microwave treatment, wherein the hot air temperature is 105 ℃, the air speed is 3m/s, the ultrasonic wave frequency is 85KHz, the microwave frequency is 2100MHz, the length of the drying channel is 10m, and the conveying belt speed is 2m/min, so that the ceramic sludge powder is obtained after treatment.
The ceramic sludge product obtained after the treatment by the method of the comparative example has the grain diameter of 42-800 mu m, the average grain diameter of 87 mu m and the water content of 15 percent.
Comparative example 2
A ceramic sludge treatment method comprises the steps 1-4 which are the same as those in the embodiment 1, the specific steps are shown in the embodiment 1, and other steps are as follows:
and S5, conveying the ceramic sludge powder mixed with the oxidant dry powder into a drying channel for heating and drying, and simultaneously performing microwave treatment, wherein the hot air temperature is 105 ℃, the air speed is 3m/s, the microwave frequency is 2100MHz, the length of the drying channel is 10m, and the conveying belt speed is 2m/min, so that the ceramic sludge micro powder is obtained after treatment.
The ceramic sludge product obtained after the treatment by the method of the comparative example has the grain diameter of 92-1500 mu m, the average grain diameter of 186 mu m and the water content of 20 percent.
Comparative example 3
A ceramic sludge treatment method comprises the steps 1-4 which are the same as those in the embodiment 1, the specific steps are shown in the embodiment 1, and other steps are as follows:
and S5, conveying the ceramic sludge powder mixed with the oxidant dry powder into a drying channel for heating and drying, and simultaneously carrying out ultrasonic treatment, wherein the hot air temperature is 105 ℃, the air speed is 3m/s, the ultrasonic frequency is 85KHz, the length of the drying channel is 10m, and the conveying belt speed is 2m/min, so as to obtain the ceramic sludge micro powder after treatment.
The ceramic sludge product obtained after the treatment by the method of the comparative example has the grain diameter of 78-1200 mu m, the average grain diameter of 165 mu m and the water content of 16 percent.
Comparative example 4
A ceramic sludge treatment method has the same steps 1-3 as the embodiment 1, and the specific steps are shown in the embodiment 1, and other steps are as follows:
and S4, conveying the crushed ceramic sludge powder into a drying channel for heating and drying, wherein the hot air temperature is 105 ℃, the air speed is 3m/s, the length of the drying channel is 10m, and the speed of a conveying belt is 2m/min, so that the ceramic sludge micro powder is obtained after treatment.
The grain diameter of the ceramic sludge product obtained after the treatment by the method of the comparative example is 136-1850 mu m, the average grain diameter is 289 mu m, and the water content is 25%.
It is understood from the above examples 1 to 5 and comparative examples 1 to 4 that the particle size and the water content of the ceramic fine powder obtained in example 1 are superior to those of the other examples and comparative examples, mainly because the cationic polyacrylamide added in example 1 is subjected to the combined action of the oxidant, the microwave and the ultrasonic wave to obtain thorough oxidative chain scission, so that the water removal rate is high, and the particle size and the dispersibility of the ceramic fine particles are good. Comparing example 1 with example 2, it can be seen that plate-frame dewatering is significantly better than stacked-spiral dewatering, and the effect of primary dewatering directly affects the effect of deep dewatering. Comparing example 1 with comparative examples 1 to 4, it can be seen that the removal of the flocculant and water is greatly affected by the oxidizing agent, the microwave and the ultrasonic wave, and thus the particle size of the ceramic fine particles is directly affected.
The ceramic micro powder obtained in the examples 1 to 5 and the ceramic sludge product obtained in the comparative examples 1 to 4 are subjected to concrete block forming to obtain concrete samples numbered as examples 1# to 4# and comparative examples 1# to 4#, wherein the concrete samples comprise 350 parts of cement, 900 parts of crushed stone, 450 parts of medium coarse sand, 100 parts of water, 6 to 8 parts of an additive and 400 parts of ceramic sludge treatment product, the cement, the water, the crushed stone, the medium coarse sand, the additive and the ceramic sludge treatment product have the same content in the examples 1# to 4# and the comparative examples 1# to 4#, the sample size is the same, the curing time and the curing condition are the same, the difference is only that the ceramic sludge treatment product in the concrete samples of the examples 1# to 4# is the ceramic micro powder of the corresponding examples, and the ceramic sludge treatment product in the comparative examples 1# to 4# is the ceramic sludge treatment product in the comparative examples 1 to 4 #. Then, the concrete samples of the embodiment 1# -4# and the comparative example 1# -4# are subjected to mechanical property test, the test method is carried out according to the standard GB/T50081-2002 for the mechanical property test method of the common concrete, and the test structure is shown in Table 1.
| Sample number | Compressive strength (7 d) MPa | Compressive strength (28 d) MPa |
| Example 1# | 47 | 68 |
| Example 2# | 25 | 41 |
| Example 3# | 40 | 58 |
| Example 4# | 42 | 62 |
| Example 5# | 45 | 65 |
| Comparative example 1# | 37 | 55 |
| Comparative example No. 2# | 26 | 45 |
| Comparative example No. 3# | 25 | 40 |
| Comparative example No. 4# | 24 | 35 |
As can be seen from Table 1, the early compressive strength and the 28-day-curing compressive strength of concrete blocks prepared in the examples 1#, 3#, 4#, and 5# are obviously superior to those of the comparative examples, especially the example 1#, because the ceramic micro powder added in the example 1# has small particles, good dispersibility and low water content, the problem of the decrease of the local mechanical property of the concrete caused by agglomeration can not occur when the ceramic micro powder is used as a partial substitute of concrete fine aggregate, and the compressive strength of the concrete is greatly improved.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (9)
1. A ceramic sludge treatment method, characterized in that the method comprises the steps of:
step S1, flocculating and precipitating: adding a flocculating agent into the ceramic sludge, wherein the flocculating agent is cationic polyacrylamide, stirring and mixing, standing for a moment, and flocculating and precipitating;
step S2, primary dehydration: preliminarily dehydrating the ceramic sludge subjected to flocculation precipitation;
s3, crushing: crushing the dehydrated ceramic sludge by a crusher, and sieving by a vibrating screen machine to obtain fine-particle ceramic sludge powder;
step S4, adding an oxidant: adding an oxidant into the ceramic sludge powder, stirring and uniformly mixing;
s5, destroying and deeply dehydrating the flocculating agent: conveying the ceramic sludge powder mixed with the oxidant into a drying channel for heating and drying, and performing ultrasonic treatment and microwave treatment in the drying channel to obtain ceramic micro powder after treatment.
2. The ceramic sludge treatment method according to claim 1, wherein the microwave treatment is provided after the ultrasonic treatment in the step S5.
3. The ceramic sludge treatment method according to claim 1, wherein in the step S5, the frequency of the ultrasonic treatment is 20KHz to 120KHz.
4. The ceramic sludge treatment method according to claim 1, wherein the frequency of the microwave treatment in step S5 is 915MHz to 2450MHz.
5. The ceramic sludge treatment method according to claim 1, wherein the heating and drying in step S5 is hot air drying at a temperature of 60 ℃ to 120 ℃.
6. The ceramic sludge treatment method according to claim 1, wherein in the step S1, the addition amount of the flocculant is 0.5-3% of the solid content of the ceramic sludge.
7. The ceramic sludge treatment method according to claim 1, wherein in the step S4, the oxidizing agent comprises one of ferric chloride, ferric sulfate, potassium ferrate, and sodium peroxodisulfate.
8. The ceramic sludge treatment method according to claim 1, wherein in the step S4, the amount of the oxidant added is 1-6% of the solid content of the ceramic sludge.
9. The ceramic sludge treatment method according to claim 1, wherein in the step S2, the preliminary dehydration is performed by using one of a plate and frame filter press and a stacked screw type sludge dehydrator.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010745939.6A CN111792813B (en) | 2020-07-29 | 2020-07-29 | Ceramic sludge treatment method |
| PCT/CN2021/105717 WO2022022270A1 (en) | 2020-07-29 | 2021-07-12 | Ceramic sludge treatment method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010745939.6A CN111792813B (en) | 2020-07-29 | 2020-07-29 | Ceramic sludge treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111792813A CN111792813A (en) | 2020-10-20 |
| CN111792813B true CN111792813B (en) | 2023-01-31 |
Family
ID=72827447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010745939.6A Active CN111792813B (en) | 2020-07-29 | 2020-07-29 | Ceramic sludge treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111792813B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022022270A1 (en) * | 2020-07-29 | 2022-02-03 | 水木金谷环境科技有限公司 | Ceramic sludge treatment method and system |
| CN211445482U (en) * | 2020-07-29 | 2020-09-08 | 佛山水木金谷环境科技有限公司 | Ceramic sludge treatment system |
| CN115814760A (en) * | 2023-01-09 | 2023-03-21 | 重庆三峡学院 | Preparation and application of sludge biochar |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5685900A (en) * | 1995-10-18 | 1997-11-11 | Ecc International Inc. | Method for beneficiating discolored kaolin to produce high brightness coating clay |
| CN1555347A (en) * | 2001-09-14 | 2004-12-15 | 英默里斯颜料公司 | Integrated process for simultaneous beneficiation, leaching, and dewatering of kaolin clay suspension |
| CN101786785A (en) * | 2010-02-04 | 2010-07-28 | 苏州群瑞环保科技有限公司 | Treatment method of sludge containing flocculant |
| CN105601083A (en) * | 2015-11-05 | 2016-05-25 | 王天成 | Processing method of ceramic polishing waste material |
-
2020
- 2020-07-29 CN CN202010745939.6A patent/CN111792813B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5685900A (en) * | 1995-10-18 | 1997-11-11 | Ecc International Inc. | Method for beneficiating discolored kaolin to produce high brightness coating clay |
| CN1555347A (en) * | 2001-09-14 | 2004-12-15 | 英默里斯颜料公司 | Integrated process for simultaneous beneficiation, leaching, and dewatering of kaolin clay suspension |
| CN101786785A (en) * | 2010-02-04 | 2010-07-28 | 苏州群瑞环保科技有限公司 | Treatment method of sludge containing flocculant |
| CN105601083A (en) * | 2015-11-05 | 2016-05-25 | 王天成 | Processing method of ceramic polishing waste material |
Non-Patent Citations (1)
| Title |
|---|
| 基于不同陶瓷砖抛光泥预处理方式蒸压加气混凝土砌块性能分析;邵伟 等;《砖瓦》;20180228(第2期);第64页第1段至第67页第2段 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111792813A (en) | 2020-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111792813B (en) | Ceramic sludge treatment method | |
| KR101467204B1 (en) | Method of integration of concentration-dehydration and aerobic air-drying of sewage sludge | |
| Liu et al. | Flocculation characteristics of polyacrylamide grafted cellulose from Phyllostachys heterocycla: an efficient and eco-friendly flocculant | |
| WO2009082886A1 (en) | A sludge concentrated dehydration method | |
| WO2009094868A1 (en) | A method for drying sludge | |
| CN106946438A (en) | The organic composite sludge dehydration conditioner and preparation method prepared using paper mill sludge | |
| CN101823723B (en) | Process method for preparing ultra-fine high-brightness sericite powder by pyrophyllite | |
| CN108503003B (en) | Rapid drying treatment process for sewage sludge based on microwave-polar medium substances | |
| CN211445482U (en) | Ceramic sludge treatment system | |
| WO2022022270A1 (en) | Ceramic sludge treatment method and system | |
| CN1723173A (en) | Ultra-dry calcium carbonate | |
| KR101737994B1 (en) | Dewatering system for high efficiency of sludge dewatering | |
| JPH11347593A (en) | Construction sludge closed type recycle treatment system | |
| CN110314687B (en) | Fe 3+ Load composite catalyst and preparation method thereof and Fenton-like sludge dehydration pretreatment method | |
| CN111573984A (en) | Coal washing wastewater treatment system | |
| CN113461304B (en) | Red mud-based mixed acid chemical conditioner special for deep dehydration of dehydrated sludge and use method thereof | |
| JP2019501020A (en) | Method for dewatering sludge with improved flocculant and plant implementing this method | |
| NL2032175B1 (en) | Ceramic sludge treatment method and system | |
| CN108341583A (en) | A kind of sludge dehydration conditioner and its dewatering | |
| JP2002254099A (en) | Recovering method of fine powder of concrete sludge, device therefor and fine powder of concrete sludge | |
| CN100497217C (en) | Sludge dewatering process | |
| Guan et al. | Lignocellulose–acrylamide–carboxymethyl cellulose copolymer as a cost-effective anionic flocculant | |
| CN105601083A (en) | Processing method of ceramic polishing waste material | |
| CN112158928A (en) | Production process of high-efficiency flocculating agent for sewage treatment | |
| CN102730934B (en) | Method for pretreating sludge before hot drying |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 528000 room 604, building 12, Lihe Science Park, Shishan town, Nanhai District, Foshan City, Guangdong Province Applicant after: Shuimu Jingu Environmental Technology Co.,Ltd. Address before: 528000 room 604, building 12, Lihe Science Park, Shishan town, Nanhai District, Foshan City, Guangdong Province Applicant before: FOSHAN SHUIMU JINGU ENVIRONMENTAL TECHNOLOGY Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |