CN113024079A - Sludge conditioning system and method thereof - Google Patents
Sludge conditioning system and method thereof Download PDFInfo
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- CN113024079A CN113024079A CN202110423140.XA CN202110423140A CN113024079A CN 113024079 A CN113024079 A CN 113024079A CN 202110423140 A CN202110423140 A CN 202110423140A CN 113024079 A CN113024079 A CN 113024079A
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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Abstract
The invention discloses a sludge conditioning system and a method thereof, wherein the sludge conditioning system comprises: the device comprises a feeding module, a conditioning module, a discharging module and a state monitoring module; the feeding module and the discharging module are respectively communicated with the conditioning module, and the state monitoring module is arranged on the conditioning module; the sludge conditioning system also comprises a central control module, wherein the state monitoring module comprises a pH value sensor and a liquid level sensor, and the central control module controls the feeding module, the conditioning module and the discharging module according to pH value data and liquid level detection signals provided by the state monitoring module so as to improve the accuracy and consistency of feeding and conditioning time; the sludge conditioning method provided by the invention conditions the sludge by adopting a method of combining hydrogen peroxide and a surfactant, reduces the dosage, improves the conditioning performance of the system on the sludge, reduces the time consumption of a conditioning process and improves the efficiency of sludge conditioning of enterprises.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a sludge conditioning system and a method thereof.
Background
Sludge is a product after sewage treatment, and is an extremely complex heterogeneous body consisting of organic debris, bacterial cells, inorganic particles, colloids and the like. The main characteristics of the sludge are high water content which can reach more than 99 percent, high organic matter content, easy decomposition and stink generation, fine particles, small specific gravity and colloidal liquid state. It is a thick matter between liquid and solid and can be transported by a pump, but it is difficult to perform solid-liquid separation by sedimentation. Sludge treatment is a process of carrying out reduction, stabilization and harmless treatment on sludge. The higher the degree of wastewater treatment, the more sludge residue will be produced to be treated. A general sewage treatment plant must be provided with a sludge treatment facility unless the sewage is treated using land treatment or a sewage pond. For modern sewage treatment plants, the treatment and disposal of sludge has become the most complex and costly part of the operation of sewage treatment systems. In the process of sludge treatment, sludge conditioning is a measure for pretreating sludge to improve the concentration and dehydration efficiency of the sludge and for economically carrying out the subsequent treatment and improving the sludge property in a planned way.
However, in the existing sludge conditioning methods, especially the chemical conditioning method mostly adopts manual feeding, manual discharging and manual monitoring, and the automation degree is low; meanwhile, in sludge conditioning, the selected coagulant or coagulant aid needs longer conditioning time. It is understood from the above that the conventional sludge conditioning system and method have a problem that the chemical conditioning method is inefficient.
Disclosure of Invention
Therefore, it is necessary to provide a sludge conditioning system and a method thereof to solve the technical problem of low efficiency of the existing chemical conditioning system and method for sludge conditioning.
The invention discloses a sludge conditioning system which comprises a feeding module, a conditioning module, a discharging module and a state monitoring module, wherein the feeding module is used for feeding sludge; the feeding module and the discharging module are respectively communicated with the conditioning module, and the state monitoring module is arranged on the conditioning module;
the feeding module comprises a mud feeding pump, a mud feeding pipeline, a medicine feeding pump, a medicine feeding pipeline and a plurality of medicine storage tanks; the output end of the mud inlet pump is communicated with mud, the mud inlet pipeline is connected with the conditioning module, the input end of the medicine inlet pump is connected with the medicine storage tank, the output end of the medicine inlet pump is communicated with medicine, and the medicine inlet pipeline is connected with the conditioning module;
the conditioning module comprises a mud inlet valve, a medicine inlet valve, a conditioning pool, a stirring device and a discharge valve, the mud inlet valve is communicated with mud, the medicine inlet valve is communicated with medicine, and the mud inlet valve, the medicine inlet valve, the discharge valve and the stirring device are arranged in the conditioning pool;
the discharge module comprises a discharge pipeline and a discharge pump; the discharge pump is respectively connected with the input end and the discharge valve, and the output end of the discharge pump is communicated with the discharge;
in one embodiment, the mud inlet valve, the medicine inlet valve and the discharge valve are arranged on the outer wall of the conditioning tank.
In one embodiment, the condition monitoring module includes a liquid level sensor and a pH sensor; the liquid level sensor and the pH value sensor are arranged in the conditioning pool.
In one embodiment, the pH sensor is fixed on a transmission shaft of the stirring device.
In one embodiment, the sludge conditioning system further includes a central control module, and the state detection module, the sludge inlet pump, the medicine inlet pump, the material outlet pump, the sludge inlet valve, the medicine inlet valve, the material outlet valve, and the stirring device are respectively in communication connection with the central control module.
A method of sludge conditioning comprising the steps of:
s1, the central control module controls to start a sludge inlet pump and a sludge inlet valve, the sludge inlet pump conveys sludge into the conditioning pool through a sludge inlet pipeline, when the suspended sludge liquid level height measured by the liquid level sensor reaches the preset working liquid level height, the liquid level sensor feeds back data to the central control module, and the central control module closes the sludge inlet valve and the sludge inlet pump;
s2, the central control module controls to start the stirring device, the pH value sensor detects the pH value of the sludge and feeds back the pH value data to the central control module, the central control module controls the medicine feeding pump and the medicine feeding valve to intermittently start medicine feeding according to the pH value data, so that the acid-base regulating agent is intermittently conveyed to the conditioning pool to regulate the pH value of the sludge to 2-7, and when the pH value of the sludge reaches a preset value, the central control module controls to close the medicine feeding pump and the medicine feeding valve and switches the pH value regulating medicine storage tank to the conditioning medicine storage tank;
s3, the central control module controls to open a medicine inlet pump and a medicine inlet valve, a sludge conditioning agent with the dosage of 0.024-0.122% of the dry weight of sludge is conveyed into a conditioning tank, after the stirring device stirs for 0-5 minutes, the central control module conveys hydrogen peroxide with the dosage of 0.0005-0.002% of the volume of sludge into the conditioning tank, after the medicine is fed, the central control module controls to close the medicine inlet pump and the medicine inlet valve, and the stirring device continues to stir for 20-60 minutes;
s4, after the conditioning tank finishes the conditioning process of the sludge, the central control module controls to close the stirring device, and opens the discharge valve and the discharge pump, and the discharge pump discharges the conditioned sludge out of the conditioning tank.
In one embodiment, the acid-base regulator includes one or more of sulfuric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide.
In one embodiment, the conditioning agent includes one or more of hydrogen peroxide, quaternary ammonium salt, higher fatty acid salt, sulfate, sulfonate, amino acid type surfactant, lecithin, betaine type surfactant, fatty glyceride, polyol type surfactant, and polyoxyethylene type surfactant.
According to the sludge conditioning system and the method thereof, the central control module is arranged, and the sludge feeding, medicine feeding, conditioning and discharging processes of the sludge conditioning system are detected and controlled according to the detection data of the pH value sensor and the liquid level sensor, so that the automation degree of the sludge conditioning process is realized. The central control module collects state detection data of the system and sends out control signals to control the feeding module, the conditioning module and the discharging module of the system. The system reduces the labor cost of enterprises and improves the sludge treatment efficiency of the enterprises while improving the accuracy and consistency of the feeding amount and the conditioning duration. In the sludge conditioning method, the sludge is conditioned by adopting the method of combining hydrogen peroxide and the surfactant, so that the time consumption and the dosage for conditioning are greatly reduced while the dehydration performance of the sludge is effectively improved. The method effectively improves the conditioning efficiency of the sludge while reducing the sludge treatment cost of enterprises.
Drawings
FIG. 1 is a schematic diagram of the modular relationship of a sludge conditioning system in one embodiment;
FIG. 2 is a system schematic diagram of a sludge conditioning system in the embodiment shown in FIG. 1
FIG. 3 is a schematic flow chart of a method for conditioning sludge in the embodiment shown in FIG. 1.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Example 1
Referring to fig. 1, the present invention discloses a sludge conditioning system and a method thereof, wherein the sludge conditioning system comprises a feeding module 1, a conditioning module 2, a discharging module 3 and a status monitoring module 4; the feeding module 1 and the discharging module 4 are respectively communicated with the conditioning module 2, and the state monitoring module 4 is arranged on the conditioning module 2.
Referring to fig. 2, in the present embodiment, the feeding module 1 of the present invention includes a mud feeding pump 11, a mud feeding pipe 12, a plurality of medicine storage tanks 13, a medicine feeding pump 14, and a medicine feeding pipe 15. Wherein, the output of the mud pump 11 is connected with the mud pipeline 12, the mud pipeline 12 is connected with the conditioning module 2, the input of the medicine pump 14 is connected with the medicine storage tank 13, the output of the medicine pump 14 is connected with the medicine inlet pipeline 15, and the medicine inlet pipeline 15 is connected with the conditioning module 2. In this embodiment, the feeding module 1 is used to provide feeding power for sludge, acid-base regulator and sludge conditioning agent, and the materials are conveyed to the conditioning module 2 through the sludge inlet pipe 12 and the medicine inlet pipe 15 by the sludge inlet pump 11 and the medicine inlet pump 14.
Referring to fig. 2, in the present embodiment, the conditioning module 2 of the present invention includes a mud valve 21, a medicine valve 22, a conditioning tank 23, a material discharge valve 24, and a stirring device 25. Wherein, the mud inlet valve 21 is connected with the mud inlet pipeline 12, the medicine inlet valve 22 is connected with the medicine inlet pipeline 15, the mud inlet valve 21, the medicine inlet valve 22 and the discharge valve 24 are arranged on the outer wall of the conditioning pool 23, and the stirrer of the stirring device 25 is arranged inside the conditioning pool 23. The discharge module 3 of the present invention comprises a discharge pipe 31 and a discharge pump 32; the discharge conduit 31 is connected to the discharge valve 24, and the input end of the discharge pump 32 is connected to the discharge conduit 31. In this embodiment, the mud inlet valve 21 and the medicine inlet valve 22 are disposed on the inner wall of the conditioning tank 23, so that the feeding amount of the mud and the medicine can be controlled more accurately, the material exchange between the residual material in the pipeline and the material in the conditioning tank 23 is avoided, and the calculation error of the conditioning process on the medicine feeding amount and the conditioning time is reduced. The stirrer of the stirring device 25 is arranged below the lowest working liquid level of the conditioning tank 23 and is close to the bottom of the conditioning tank 23 as much as possible, so that the materials are stirred more uniformly in the conditioning process, the air floatation of the sludge and the coagulation of the sludge flocs are more sufficient, the action rate is accelerated, and the time consumption of the conditioning process is reduced.
Referring to fig. 2, in the present embodiment, the status monitoring module 4 of the invention includes a liquid level sensor 41 and a pH sensor 42; the liquid level sensor 41 and the pH sensor 42 are installed in the conditioning tank 23. Wherein, the pH value sensor 42 is fixed below the working liquid level of the conditioning pool 23. The sludge conditioning system also comprises a central control module 5, wherein the state detection module 4, the sludge inlet pump 11, the medicine inlet pump 14, the discharge pump 32, the sludge inlet valve 21, the medicine inlet valve 22, the discharge valve 24 and the stirring device 25 are respectively in communication connection with the central control module 5 through RS485 serial ports. In the present embodiment, the chemical feed pump 14 is a fixed displacement pump, and the mud feed valve 21, the chemical feed valve 22, and the discharge valve 24 are electromagnetic valves, respectively. In this embodiment, the liquid level sensor 41 and the pH sensor 42 detect the liquid level and the pH of the sludge in real time, and transmit the real-time detection data to the central control module 5, so that the operator can monitor the sludge conditioning system according to the detection data. The operating personnel through predetermineeing the working liquid level height of above-mentioned equalizing basin 23 for when mud reaches above-mentioned predetermined liquid level height in the feeding process, central control module 5 accessible RS485 serial ports sends control signal to the mud pump 11 and the mud valve 21 of advancing of this embodiment, and then closes mud pump 11 and the mud valve 21 of advancing, in order to stop the feeding of mud. After the feeding process of the sludge is completed, the sludge conditioning system of the embodiment starts to adjust the pH value of the sludge. The central control module 5 controls the stirring device to start stirring, and controls the medicine inlet pump and the medicine inlet valve to feed the acid-base regulator. When the pH value of the sludge measured by the pH value sensor reaches a preset value, the central control module 5 closes the medicine inlet pump 14 and the medicine inlet valve 22 and prepares for feeding of a conditioning agent. The conditioning agent is dosed quantitatively, and an operator sets the opening time of the medicine inlet pump 14 and the opening time of the medicine inlet valve 22 according to the water content of the sludge to be conditioned, the type of the conditioning agent and the medicine inlet efficiency of the medicine inlet pump 14, so that the accuracy of the quantitative dosing of the conditioning agent is improved.
Referring to fig. 2 and 3, a method for sludge conditioning includes the following steps:
s1, the central control module 5 controls to open the mud inlet pump 11 and the mud inlet valve 21, the mud inlet pump 11 conveys the mud into the conditioning tank 23 through the mud inlet pipeline 12, and when the mud suspension liquid level measured by the liquid level sensor 41 reaches the preset working liquid level and the liquid level data is fed back to the central control module 5, the central control module 5 controls to close the mud inlet valve 21 and the mud inlet pump 11 and switches the pH value adjusting medicine storage tank to the conditioning medicine storage tank.
S2, the central control module 5 controls to start the stirring device 25, the pH value sensor 42 detects the pH value of the sludge and feeds back the pH value data to the central control module 5, the central control module 5 controls the medicine inlet pump 14 and the medicine inlet valve 22 to intermittently start medicine inlet according to the pH value data, so that the acid-base regulating agent is intermittently conveyed to the conditioning tank 23 to regulate the pH value of the sludge to 2-7, and when the pH value of the sludge reaches a preset value, the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22.
S3, after the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22, the medicine storage tank 13 is replaced, the pH value adjusting medicine storage tank is switched to the conditioning medicine storage tank, and a feeding process of a sludge conditioning agent is prepared.
S4, the central control module 5 controls to open the medicine inlet pump 14 and the medicine inlet valve 22, surfactant with the dosage of 0.024-0.122% of the dry weight of the sludge is conveyed into the conditioning tank 23, and after the stirring device 25 stirs for 0-5 minutes, the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22.
And S5, after the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22, replacing the medicine storage tank 13 and preparing a feeding process of hydrogen peroxide.
S6, the central control module 5 conveys hydrogen peroxide with the dosage of 0.0005-0.002% of the volume of the sludge to the conditioning tank 23, and after the medicine feeding is finished, the central control module 5 controls to close the medicine feeding pump 14 and the medicine feeding valve 22, and the stirring device 25 continues to stir for 20-60 minutes.
S7, after the conditioning tank 23 finishes the conditioning process of the sludge, the central control module 5 controls to close the stirring device 25, open the discharge valve 24 and the discharge pump 32, and the discharge pump 32 discharges the conditioned sludge out of the conditioning tank 23.
In this embodiment, the acid-base regulator includes one or more of sulfuric acid, hydrochloric acid, sodium hydroxide, and potassium hydroxide. The sludge conditioning method provided by the invention conditions the sludge by adopting a method of combining hydrogen peroxide and a surfactant, and when the sludge is alkaline, the flocculation effect of the hydrogen peroxide on the sludge is greatly influenced by the alkaline environment, so that the pH value of the sludge to be conditioned needs to be adjusted to be 2-7. In this embodiment, in order to avoid an excessive mutation in the critical point during the pH adjustment of the sludge, the pH is finely adjusted when the pH of the sludge approaches a preset value by using the combination of an acid agent and an alkali agent.
In this embodiment, the method for conditioning sludge of the present invention employs a combination of a surfactant and hydrogen peroxide to improve the dewatering performance of sludge. Compared with the independent feeding of the surfactant or the hydrogen peroxide, the combination of the two sludge conditioners greatly reduces the total feeding amount of the agents and shortens the conditioning time of the sludge conditioning process while ensuring the excellent sludge conditioning effect. The hydrogen peroxide is a strong chemical oxidant, has good oxidability under acid and alkaline conditions, and is green and environment-friendly. In the invention, the hydrogen peroxide can break the cell walls of microorganisms in the sludge to release intracellular substances, thereby achieving the effect of improving the extraction rate of protein in the sludge, and the hydrogen peroxide can promote the air flotation separation of solid particles in the sludge, thereby having good conditioning effect.
In this embodiment, the conditioning agent includes one or more of quaternary ammonium salt, higher fatty acid salt, sulfate, sulfonate, amino acid type surfactant, lecithin, betaine type surfactant, fatty glyceride, polyol type surfactant, and polyoxyethylene type surfactant. The sludge conditioning method of the invention conditions the sludge by adopting the surfactant to improve the dehydration performance of the sludge. In the embodiment, the surfactant can remarkably improve the surface activity of the sludge solution, and has a remarkable improvement effect on sludge dewatering. The surfactant has the advantages that when the concentration of the surfactant in water reaches the critical micelle concentration or higher, micelles are formed and original insoluble or water-soluble substances are wrapped, so that the solubility of the surfactant is increased; a large amount of interstitial water and surface adsorption water wrapped in extracellular polymers in the sludge, and the surfactant can release the interstitial water and the adsorption water wrapped in the extracellular polymers while wrapping organic matters such as the extracellular polymers in the sludge; the hydrophobic long chain in the surfactant can act with the cell wall of the microorganism and is adsorbed on the cell through acting forces such as static electricity, hydrogen bond and the like, so that the nutrition intake of the cell is inhibited, and the cell is broken and killed; the surfactant can promote aggregation and sedimentation of activated sludge flocs, so that sludge-water separation is promoted; in addition, the surfactant can dissolve and release extracellular polymer with negative charges, neutralize the negative charges of the sludge flocs and reduce the zeta potential of the sludge flocs, thereby promoting the coagulation and aggregation of the sludge flocs, enlarging the particle size of the sludge flocs and promoting the improvement of the dewatering performance and the sedimentation performance of the sludge.
Example 2
Referring to fig. 2 and 3, the present embodiment provides a method of a sludge conditioning system according to embodiment 1, which includes the following steps:
s1, the central control module 5 controls to open the mud inlet pump 11 and the mud inlet valve 21, the mud inlet pump 11 conveys the mud into the conditioning tank 23 through the mud inlet pipeline 12, and when the mud suspension liquid level measured by the liquid level sensor 41 reaches the preset working liquid level and the liquid level data is fed back to the central control module 5, the central control module 5 controls to close the mud inlet valve 21 and the mud inlet pump 11 and switches the pH value adjusting medicine storage tank to the conditioning medicine storage tank.
S2, the central control module 5 controls to start the stirring device 25, the pH value sensor 42 detects the pH value of the sludge and feeds back the pH value data to the central control module 5, the central control module 5 controls the medicine inlet pump 14 and the medicine inlet valve 22 to intermittently start medicine inlet according to the pH value data, so that the acid-base regulating agent is intermittently conveyed to the conditioning tank 23 to regulate the pH value of the sludge to 2-7, and when the pH value of the sludge reaches a preset value, the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22.
S3, after the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22, the medicine storage tank 13 is replaced, the pH value adjusting medicine storage tank is switched to the conditioning medicine storage tank, and a feeding process of a sludge conditioning agent is prepared.
S4, the central control module 5 controls to open the medicine inlet pump 14 and the medicine inlet valve 22, surfactant with the dosage of 0.024-0.122% of the dry weight of the sludge is conveyed into the conditioning tank 23, and after the stirring device 25 stirs for 3-5 minutes, the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22.
And S5, after the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22, replacing the medicine storage tank 13 to prepare a feeding process of hydrogen peroxide.
S6, the central control module 5 conveys hydrogen peroxide with the dosage of 0.001-0.002% of the sludge volume to the conditioning pool 23, and after the medicine feeding is finished, the central control module 5 controls to close the medicine feeding pump 14 and the medicine feeding valve 22 and continue to stir for 40-60 minutes.
S7, after the conditioning tank 23 finishes the conditioning process of the sludge, the central control module 5 controls to close the stirring device 25, open the discharge valve 24 and the discharge pump 32, and the discharge pump 32 discharges the conditioned sludge out of the conditioning tank 23.
In this embodiment, the acid-base regulator includes one or more of sulfuric acid, hydrochloric acid, sodium hydroxide, and potassium hydroxide.
Example 3
Referring to fig. 2 and 3, the present embodiment provides a method of a sludge conditioning system according to embodiment 1, which includes the following steps:
s1, the central control module 5 controls to open the mud inlet pump 11 and the mud inlet valve 21, the mud inlet pump 11 conveys the mud into the conditioning tank 23 through the mud inlet pipeline 12, and when the mud suspension liquid level measured by the liquid level sensor 41 reaches the preset working liquid level and the liquid level data is fed back to the central control module 5, the central control module 5 controls to close the mud inlet valve 21 and the mud inlet pump 11 and switches the pH value adjusting medicine storage tank to the conditioning medicine storage tank.
S2, the central control module 5 controls to start the stirring device 25, the pH value sensor 42 detects the pH value of the sludge and feeds back the pH value data to the central control module 5, the central control module 5 controls the medicine inlet pump 14 and the medicine inlet valve 22 to intermittently start medicine inlet according to the pH value data, so that the acid-base regulating agent is intermittently conveyed to the conditioning tank 23 to regulate the pH value of the sludge to 2-7, and when the pH value of the sludge reaches a preset value, the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22.
S3, after the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22, the medicine storage tank 13 is replaced, the pH value adjusting medicine storage tank is switched to the conditioning medicine storage tank, and a feeding process of a sludge conditioning agent is prepared.
S4, the central control module 5 controls to open the medicine inlet pump 14 and the medicine inlet valve 22, the surfactant with the dosage of 0.040% of the dry weight of the sludge is conveyed into the conditioning tank 23, and after the stirring device 25 stirs for 5 minutes, the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22.
And S5, after the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22, replacing the medicine storage tank 13 to prepare a feeding process of hydrogen peroxide.
S6, the central control module 5 transmits hydrogen peroxide with the dosage of 0.001% of the sludge volume to the conditioning tank 23, when the medicine feeding is completed, the central control module 5 controls to close the medicine feeding pump 14 and the medicine feeding valve 22, and the stirring device 25 continues to stir for 40 minutes.
S7, after the conditioning tank 23 finishes the conditioning process of the sludge, the central control module 5 controls to close the stirring device 25, open the discharge valve 24 and the discharge pump 32, and the discharge pump 32 discharges the conditioned sludge out of the conditioning tank 23.
In this embodiment, the acid-base regulator includes one or more of sulfuric acid, hydrochloric acid, sodium hydroxide, and potassium hydroxide.
Example 4
Referring to fig. 2 and 3, the present embodiment provides a method of a sludge conditioning system according to embodiment 1, which includes the following steps:
s1, the central control module 5 controls to open the mud inlet pump 11 and the mud inlet valve 21, the mud inlet pump 11 conveys the mud into the conditioning tank 23 through the mud inlet pipeline 12, and when the mud suspension liquid level measured by the liquid level sensor 41 reaches the preset working liquid level and the liquid level data is fed back to the central control module 5, the central control module 5 controls to close the mud inlet valve 21 and the mud inlet pump 11 and switches the pH value adjusting medicine storage tank to the conditioning medicine storage tank.
S2, the central control module 5 controls to start the stirring device 25, the pH value sensor 42 detects the pH value of the sludge and feeds back the pH value data to the central control module 5, the central control module 5 controls the medicine inlet pump 14 and the medicine inlet valve 22 to intermittently start medicine inlet according to the pH value data, so that the acid-base regulating agent is intermittently conveyed to the conditioning tank 23 to regulate the pH value of the sludge to 2-7, and when the pH value of the sludge reaches a preset value, the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22.
S3, after the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22, the medicine storage tank 13 is replaced, the pH value adjusting medicine storage tank is switched to the conditioning medicine storage tank, and a feeding process of a sludge conditioning agent is prepared.
S4, the central control module 5 controls to open the medicine inlet pump 14 and the medicine inlet valve 22, surfactant with dosage of 0.097.6% of the dry weight of the sludge is delivered to the conditioning tank 23, and after the stirring device 25 stirs for 5 minutes, the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22.
And S5, after the central control module 5 controls to close the medicine inlet pump 14 and the medicine inlet valve 22, replacing the medicine storage tank 13 to prepare a feeding process of hydrogen peroxide.
S6, the central control module 5 transmits hydrogen peroxide with the dosage of 0.001% of the sludge volume to the conditioning tank 23, when the medicine feeding is completed, the central control module 5 controls to close the medicine feeding pump 14 and the medicine feeding valve 22, and the stirring device 25 continues to stir for 60 minutes.
S7, after the conditioning tank 23 finishes the conditioning process of the sludge, the central control module 5 controls to close the stirring device 25, open the discharge valve 24 and the discharge pump 32, and the discharge pump 32 discharges the conditioned sludge out of the conditioning tank 23.
In this embodiment, the acid-base regulator includes one or more of sulfuric acid, hydrochloric acid, sodium hydroxide, and potassium hydroxide.
In this embodiment, the conditioning agent includes one or more of quaternary ammonium salt, higher fatty acid salt, sulfate, sulfonate, amino acid type surfactant, lecithin, betaine type surfactant, fatty glyceride, polyol type surfactant, and polyoxyethylene type surfactant.
In summary, in the above embodiments, the sludge conditioning system and the method thereof of the present invention, by setting the central control module, detect and control the sludge feeding, the medicine feeding, the stirring, the conditioning process, and the discharging of the sludge conditioning system based on the detection data of the pH sensor and the liquid level sensor, and enhance the automation degree of the sludge conditioning process. The central control module collects the state detection data of the system in a serial port communication mode of RS485 and sends out control signals to control the feeding module, the conditioning module, the discharging module and the state monitoring module of the system. The system reduces the labor cost of enterprises and improves the sludge treatment efficiency of the enterprises while improving the accuracy and consistency of the feeding amount and the conditioning duration. In the embodiment, in the sludge conditioning method, the sludge is conditioned by using the hydrogen peroxide and the surfactant together, so that the dewatering performance of the sludge is effectively improved, the conditioning time and the dosage are greatly reduced, and the sludge conditioning efficiency is effectively improved while the sludge treatment cost of enterprises is reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A sludge conditioning system, comprising: the device comprises a feeding module, a conditioning module, a discharging module and a state monitoring module; the feeding module and the discharging module are respectively communicated with the conditioning module, and the state monitoring module is arranged on the conditioning module;
the feeding module comprises a mud feeding pump, a mud feeding pipeline, a medicine feeding pump, a medicine feeding pipeline and a plurality of medicine storage tanks; the output end of the mud inlet pump is communicated with the mud inlet, the mud inlet pipeline is connected with the conditioning module, the input end of the medicine inlet pump is connected with the medicine storage tank, the output end of the medicine inlet pump is communicated with the medicine inlet, and the medicine inlet pipeline is connected with the conditioning module;
the conditioning module comprises a mud inlet valve, a medicine inlet valve, a conditioning pool, a stirring device and a discharge valve, the mud inlet valve is communicated with mud, the medicine inlet valve is communicated with medicine, and the mud inlet valve, the medicine inlet valve, the discharge valve and the stirring device are arranged in the conditioning pool;
the discharge module comprises a discharge pipeline and a discharge pump; the discharge pump is respectively connected with the input end and the discharge valve, and the output end of the discharge pump is communicated with the discharge material.
2. The sludge conditioning system method of claim 1 wherein the sludge inlet valve, the drug inlet valve and the discharge valve are disposed on an outer sidewall of the conditioning tank.
3. The sludge conditioning system method of claim 1 wherein the condition monitoring module comprises a liquid level sensor and a pH sensor; the liquid level sensor and the pH value sensor are arranged in the conditioning pool.
4. The method of claim 3, wherein the sludge conditioning system further comprises a central control module, and the status detection module, the sludge inlet pump, the sludge discharge pump, the sludge inlet valve, the sludge discharge valve, and the stirring device are in communication with the central control module, respectively.
5. A method for sludge conditioning, characterized in that the sludge conditioning system of any one of claims 1 to 4 is used, which comprises the following steps:
s1, the central control module controls to open the sludge inlet pump and the sludge inlet valve, the sludge inlet pump conveys sludge into the conditioning pool through the sludge inlet pipeline, when the suspended sludge level measured by the liquid level sensor reaches a preset working liquid level, the liquid level sensor feeds back data to the central control module, and the central control module closes the sludge inlet valve and the sludge inlet pump;
s2, the central control module controls to start the stirring device, the pH value sensor detects the pH value of the sludge and feeds back the pH value data to the central control module, the central control module controls the medicine feeding pump and the medicine feeding valve to intermittently start medicine feeding according to the pH value data, so that an acid-base adjusting agent is intermittently conveyed to the conditioning pool to adjust the pH value of the sludge to 2-7, and when the pH value of the sludge reaches a preset value, the central control module controls to close the medicine feeding pump and the medicine feeding valve and adjusts the pH value of the medicine storage tank to condition the medicine storage tank;
s3, the central control module controls to open the medicine inlet pump and the medicine inlet valve, a sludge conditioning agent with the dosage of 0.024-0.122% of the dry weight of sludge is conveyed into the conditioning pool, after the stirring device stirs for 0-5 minutes, the central control module conveys hydrogen peroxide with the dosage of 0.0005-0.002% of the volume percentage content of sludge into the conditioning pool, after the medicine inlet is finished, the central control module controls to close the medicine inlet pump and the medicine inlet valve, and the stirring device continues to stir for 20-60 minutes;
s4, after the conditioning tank finishes the conditioning process of the sludge, the central control module controls to close the stirring device and open the discharge valve and the discharge pump, and the discharge pump discharges the conditioned sludge out of the conditioning tank.
6. The method for sludge conditioning according to claim 5, wherein the pH modifier comprises one or a mixture of sulfuric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide.
7. The method of sludge conditioning according to claim 5, wherein the conditioning agent comprises one or a mixture of more of quaternary ammonium salt, higher fatty acid salt, sulfate, sulfonate, amino acid type surfactant, lecithin, betaine type surfactant, fatty acid glyceride, polyhydric alcohol type surfactant and polyoxyethylene type surfactant.
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| CN106430890A (en) * | 2016-10-26 | 2017-02-22 | 中国建筑材料科学研究总院 | Sludge dewatering method for reduction |
| CN108996886A (en) * | 2018-09-13 | 2018-12-14 | 天津壹新环保工程有限公司 | A kind of automation sludge dewatering system and method |
| CN110054394A (en) * | 2019-05-07 | 2019-07-26 | 南京江岛环境科技研究院有限公司 | A method of improving thickened sludge dewatering |
| CN210915784U (en) * | 2019-10-31 | 2020-07-03 | 中冶华天工程技术有限公司 | Intelligent sludge oxidation conditioning device |
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| CN106430890A (en) * | 2016-10-26 | 2017-02-22 | 中国建筑材料科学研究总院 | Sludge dewatering method for reduction |
| CN108996886A (en) * | 2018-09-13 | 2018-12-14 | 天津壹新环保工程有限公司 | A kind of automation sludge dewatering system and method |
| CN110054394A (en) * | 2019-05-07 | 2019-07-26 | 南京江岛环境科技研究院有限公司 | A method of improving thickened sludge dewatering |
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Application publication date: 20210625 |