Sludge dewatering performance testing device and testing method
阅读说明：本技术 污泥脱水性能测试装置及测试方法 (Sludge dewatering performance testing device and testing method ) 是由 司恩良 何光亚 程俊 闵飞虎 熊霞 杨明 张焜 夏坤 马仁豪 张娜 于 2019-09-20 设计创作，主要内容包括：本发明提供一种污泥脱水性能测试装置及测试方法,包括液压传动系统以及压滤装置,所述液压传动系统包括液压站以及与液压站相连接的液压缸,所述压滤装置包括布泥凹槽和测量装置,所述布泥凹槽用于放置污泥样品并设置有多个出水孔,所述测量装置通过管道与所述布泥凹槽相连接,用于测量压滤出的滤液体积。本发明通过上述测试装置实现的对污泥脱水性能的测试,简化了测试过程并提高了测试结果的准确性。(The invention provides a sludge dewatering performance testing device and a testing method, which comprise a hydraulic transmission system and a filter pressing device, wherein the hydraulic transmission system comprises a hydraulic station and a hydraulic cylinder connected with the hydraulic station, the filter pressing device comprises a sludge distribution groove and a measuring device, the sludge distribution groove is used for placing a sludge sample and is provided with a plurality of water outlet holes, and the measuring device is connected with the sludge distribution groove through a pipeline and is used for measuring the volume of filtrate filtered by pressure. The testing device provided by the invention can be used for testing the sludge dewatering performance, so that the testing process is simplified and the accuracy of the testing result is improved.)
1. The utility model provides a sludge dewatering capability test device, includes hydraulic transmission system and filter pressing device, hydraulic transmission system includes hydraulic pressure station (11) and pneumatic cylinder (12) that are connected with the hydraulic pressure station, its characterized in that, filter pressing device includes:
the sludge distribution groove (21) is used for placing a sludge sample and is provided with a plurality of water outlet holes;
a measuring device (22) connected to the water outlet opening by a pipe for measuring the volume of filtrate pressed out.
2. The device for testing the sludge dewatering performance according to claim 1, characterized in that one end of the hydraulic cylinder (12) is provided with a push plate (13), and the end of the hydraulic cylinder provided with the push plate is vertically and downwards arranged on the first bearing plate (3).
3. The sludge dewatering performance testing device according to claim 2, wherein the push plate (14) is capable of moving up and down along the axial direction of the hydraulic cylinder (13).
4. The sludge dewatering performance testing device according to claim 2, wherein a second bearing plate (4) connected with the bracket (3) is arranged right below the push plate (14), and the sludge distribution groove (21) is fixed on the upper end face of the second bearing plate.
5. The sludge dewatering performance testing device according to claims 2 and 4, characterized in that the first pressure bearing plate (3) and the second pressure bearing plate (4) are arranged on the bracket (5) in parallel.
6. A sludge dewatering performance test method using the sludge dewatering performance test device according to any one of the above 1 to 4 is characterized in that the sludge dewatering performance test method comprises the following specific operation steps:
s1, taking a proper amount of sludge sample, measuring the water content of the sludge sample by using an oven method, and calculating the volume of the sludge sample, wherein the calculation formula is as follows:
V1＝M1/(1-C1)
wherein: v1Is the sludge sample volume, M1Is the sample sludge absolute dry solid content, C1The water content of the sludge is obtained;
s2, putting a sludge sample into the filter bag, connecting a filter pressing device, putting the filter bag filled with the sludge sample into a sludge distribution groove, and setting the pressure to be P1Starting filter pressing;
s3, recording the volume of the filtrate in the measuring device every 10s or 15s (the time for the filter pressing to finish can be properly prolonged) until the volume of the filtrate is VtDrawing by taking t/V as a vertical coordinate and V as a horizontal coordinate to obtain a slope b;
s4, increasing the pressure, wherein the increased pressure is P2Press filtration for a certain time t2After the filter pressing is finished, removingTaking the mud cake in the filter bag, and measuring the solid content of the mud cake;
s5, taking a plurality of sludge samples obtained in the step a, adding a proper amount of conditioner into the sludge samples, wherein the conditioner in each sludge sample is different from the conditioner in each sludge sample, and repeating the steps S1-S5;
and S6, comparing the data to obtain a conclusion.
7. The method for testing sludge dewatering performance according to claim 5, characterized in that the absolute dry solid content M of the sludge is120g to 100g, P1And P2The numerical value can simulate the performance parameters of the sludge filter-pressing device to be adjusted, P1Is 0.03MPa to 0.3MPa, P20.5-2 MPa, constant pressure time t2Is 1min-10 min.
Technical Field
The invention relates to the technical field of sludge high-dry dehydration, in particular to a device and a method for testing sludge dehydration performance.
Background
The sludge high-dry dehydration is that the sludge dehydration performance needs to be tested before mechanical dehydration such as plate-and-frame filter press, the dehydration performance directly affects the treatment efficiency and the sludge dehydration degree of sludge dehydration equipment, the sludge with poor sludge dehydration performance needs to be conditioned and modified in a physical, chemical or biological mode, the conditioning process is selected according to the sludge dehydration performance index after testing different conditioning modes, and the testing method of the sludge dehydration performance is of great importance.
The sludge specific resistance and the capillary water absorption time are the most commonly used indexes and test methods for characterizing the sludge dewatering performance at present, and the sludge specific resistance has large error of test results and long test period due to the fact that the measured parameters are complicated and the test time of part of parameters is long, and accuracy and effectiveness of the test results are affected. CST can only represent the sludge-water separation effect under the non-pressure state, the deviation of the test result and the filter pressing result of the filter pressing equipment is large, and the dehydration performance of the pressure-treated sludge cannot be accurately judged.
Disclosure of Invention
The method aims to solve the problems that in the prior art, the specific resistance and capillary water absorption time of sludge are used as indexes and test methods for representing the sludge dewatering performance, the measured parameters are complicated, the test time of part of parameters is long, the error of the test result is large, the test period is long, and the like, and the accuracy and the effectiveness of the sludge dewatering performance test are influenced. The testing device provided by the invention can be used for testing the sludge dewatering performance, so that the testing process is simplified and the accuracy of the testing result is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a sludge dewatering capability test device, includes hydraulic transmission system and filter pressing device, hydraulic transmission system includes hydraulic pressure station and the pneumatic cylinder that is connected with hydraulic pressure station, filter pressing device includes cloth mud recess and measuring device, the cloth mud recess is used for placing the mud sample and is provided with a plurality of apopores, measuring device pass through the pipeline with the cloth mud recess is connected for the filtrating volume that the measurement pressure filtered out.
Preferably, one end of the hydraulic cylinder is provided with a push plate, and the end of the hydraulic cylinder provided with the push plate is vertically and downwards arranged on the first bearing plate.
Preferably, the push plate is movable up and down in the axial direction of the hydraulic cylinder.
Furthermore, a second bearing plate is arranged right below the push plate, and the mud distribution groove is fixed on the upper end face of the second bearing plate.
Preferably, the first bearing plate and the second bearing plate are arranged on the bracket in parallel.
A sludge dewatering performance testing method uses the sludge dewatering performance testing device, and the sludge dewatering performance testing method comprises the following specific operation steps:
s1, taking a proper amount of sludge sample, measuring the water content of the sludge sample by using an oven method, and calculating the volume of the sludge sample, wherein the calculation formula is as follows:
V1＝M1/(1-C1)
wherein: v1Is the sludge sample volume, M1Is the sample sludge absolute dry solid content, C1The water content of the sludge is obtained;
s2, putting a sludge sample into the filter bag, connecting a filter pressing device, putting the filter bag filled with the sludge sample into a sludge distribution groove, and setting the pressure to be P1Starting filter pressing;
s3, recording the filtering in the measuring device every 10s or 15s (the rapid end time of the filter pressing can be properly prolonged)Volume of liquid until volume of filtrate is VtDrawing by taking t/V as a vertical coordinate and V as a horizontal coordinate to obtain a slope b;
s4, increasing the pressure, wherein the increased pressure is P2Press filtration for a certain time t2After the filter pressing is finished, taking the mud cake in the filter bag, and measuring the solid content of the mud cake;
s5, taking a plurality of sludge samples obtained in the step a, adding a proper amount of conditioner into the sludge samples, wherein the conditioner in each sludge sample is different from the conditioner in each sludge sample, and repeating the steps S1-S5;
and S6, comparing the data to obtain a conclusion.
Preferably, the sludge has an oven-dried solids content M120g to 100g, P1And P2The numerical value can simulate the performance parameters of the sludge filter-pressing device to be adjusted, P1Is 0.03MPa to 0.3MPa, P20.5-2 MPa, constant pressure time t2Is 1min-10 min.
According to the technical scheme, the problems that in the prior art, the specific resistance of sludge and the capillary water absorption time are used as indexes and test methods for representing the sludge dewatering performance, the measured parameters are complicated, the test time of part of parameters is long, the error of the test result is large, the test period is long and the like are solved, and the accuracy and the effectiveness of the sludge dewatering performance test are influenced. The testing device provided by the invention can be used for testing the sludge dewatering performance, so that the testing process is simplified and the accuracy of the testing result is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a flow chart of the specific steps of the sludge dewatering performance test method;
in the figure, 11, a hydraulic station; 12. a hydraulic cylinder; 13. pushing the plate; 21. a mud distributing groove; 22. a measuring device; 3. a first bearing plate; 4. a second bearing plate; 5. and (4) a bracket.
Detailed Description
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
The sludge dewatering performance testing device comprises a hydraulic transmission system and a filter pressing device, wherein the hydraulic transmission system comprises a
The hydraulic transmission is a transmission mode for energy transmission and control by taking liquid as a working medium, and a hydraulic transmission technology is mechanically adopted, so that the structure of the machine can be simplified, the quality of the machine is reduced, the material consumption is reduced, the manufacturing cost is reduced, the labor intensity is reduced, and the working efficiency and the working reliability are improved.
As shown in fig. 1, one end of the
As shown in fig. 1, the
As shown in figure 1, because a relatively large pressure is generated in the filter pressing process, a
One embodiment is described below: taking a sludge sample to be measured, determining the water content C of the sludge by an oven method, wherein the density of the sludge sample is 1g/ml1Setting the sample sludge absolute dry solid content M to be 95 percent140g, the volume of the sludge sample is V1＝M1/(1-C1) 800 ml; putting a sample to be tested into the filter bag, connecting a sludge filter pressing device according to a structural schematic diagram, putting the filter bag filled with the sludge sample into the sludge distribution groove, and setting filter pressing pressure P1The pressure filtration is started when the pressure is 0.1 MPa; record the filtrate volume every 10s until the filtrate volume is VtIs 500ml, and takes t/V as longitudinal seatPlotting V as abscissa to obtain 2 with slope b of 0.0325 s/ml; adjusting the pressure P of the filter press2Setting constant pressure time t to be 1MPa2The filter pressing is started for 2 min; taking out the mud cake in the filter bag after the filter pressing is finished, and measuring the solid content C of the mud caked033 percent; taking the same sludge to be detected, wherein the absolute dry solid content of sample sludge is 40g, the volume of a sludge sample is 800ml, and sequentially adding 4g of ferric trichloride and 2g of organic liquid conditioner and uniformly stirring; the above steps were repeated to obtain b1 ═ 0.0121s/ml2, solid content Cd145 percent of the root of American ginseng; compare data due to b1< b0 and Cd0＜Cd1Therefore, the addition of ferric trichloride and an organic liquid conditioner in the sludge sample improves the sludge dehydration rate and the sludge dehydration dryness, and the dehydration performance of the sludge sample added with ferric trichloride and the organic conditioner is superior to that of the original sludge sample.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
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