CN203037648U - Sludge dewatering performance measuring system - Google Patents
Sludge dewatering performance measuring system Download PDFInfo
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- CN203037648U CN203037648U CN 201220712975 CN201220712975U CN203037648U CN 203037648 U CN203037648 U CN 203037648U CN 201220712975 CN201220712975 CN 201220712975 CN 201220712975 U CN201220712975 U CN 201220712975U CN 203037648 U CN203037648 U CN 203037648U
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- sludge
- dehydration
- filtrate
- dewatering
- pressure
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Abstract
The utility model discloses a sludge dewatering performance measuring system. The sludge dewatering performance measuring system comprises a sludge storage tower, a high-pressure sludge pump, a pressure tank, a dewatering device and a filtrate collecting tank, the sludge storage tower, the pressure tank and the dewatering device are sequentially connected through a sludge pipeline, the dewatering device is connected with the filtrate collecting tank through a filtrate pipeline, a pressure regulator is arranged on the high-pressure sludge pump, a pressure sensor is arranged on the pressure tank, a one-way valve and a sludge flow meter are arranged on the sludge pipeline, and a switching valve and a water flow meter are arranged on the filtrate pipeline. A method of the system includes: measuring flow of paper sludge before dewatering and flow of filtrate after dewatering, measuring water content of a sludge filter cake obtained after dewatering, and computing dewatering indexes of the sludge filter cake so that series parameters of the sludge dewatering performance are obtained. The sludge dewatering performance measuring system achieves standardized test of the sludge dewatering performance to form a standardized data system, and is beneficial to comparison of sludge dewatering performances of different kinds of sludge, and accordingly treatment cost of sludge recycling is lowered.
Description
Technical field
The utility model relates to the paper mill sludge processing technology field, particularly a kind of dewatering performance of sludge test macro.
Background technology
The comprehensive utilization of paper mill sludge mainly contains soil utilization, heat recovery and utilization and building materials utilization.Contain more organic matter through the paper mill sludge that fully becomes thoroughly decomposed, contain a certain amount of N, P, K fertilizer efficiency, fiber after becoming thoroughly decomposed, lignin etc. help to improve soil ion-exchange level, and the calcium in the filler can finely improve acid ground, and good soil value is arranged.The dewatered sludge calorific value can be used as the fuel burning and carries out heat recovery and utilization between 2000 ~ 3000Kcal/kg, and its inorganic part can be used as the raw material of building materials such as cement, brick, also can carry out the recovery of papermaking filler.As seen the solid constituent that contains of paper mill sludge has good, value widely.
But because its characteristic that is difficult to dewater, the mud cake behind the filter-press dehydration still contains the large quantity of moisture up to 70 ~ 80% at present, and its value far can not compensate the drying and dehydrating cost before utilizing, thereby has hindered the practical application of various comprehensive Utilization Ways.Supporting so the dehydration of the low cost of paper mill sludge is various disposal and the gordian technique of utilizing method, is that paper mill sludge is worth the economic feasibility guarantee of recycling.
In the existing sludge dewatering production procedure, lack detection means, generally just rely on the experience accumulation of production operation, do not form standardized data system, be unfavorable for the comparison between the different sludge dewaterings and formulate the operating procedure of standard, the cost of the sludge dewatering treatment of increase.
Realize the low-cost mud mass dryness fraction that improves, need set up the detection system of dehydration of papermaking sludge characteristic, for different dehydration of papermaking sludge characteristics is analyzed and researched, and select suitable dehydration equipment according to this, formulate corresponding dewatering process and parameter thereof, and for the application paper mill sludge provides standardized technical indicator, for low-cost processes paper mill sludge, recycling paper mill sludge provide important research means.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of dewatering performance of sludge test macro is provided, and can realize the standardized test of dewatering performance of sludge by this system, thereby reduces the processing cost of mud recycling and technical support is provided.
The technical solution of the utility model is: a kind of dewatering performance of sludge test macro, comprise storage mud tower, high pressure sludge pump, head tank, dehydration plant and filtrate holding tank, storage mud tower, high pressure sludge pump, head tank are connected by sludge pipe successively with dehydration plant, and dehydration plant is connected by the filtrate pipeline with the filtrate holding tank; The high pressure sludge pump is provided with pressure governor, head tank is provided with pressure transducer, the sludge pipe that head tank is connected with dehydration plant is provided with retaining valve and mud discharge meter, and dehydration plant and filtrate are collected tank connected filtrate pipeline and is provided with switch valve and water ga(u)ge.
Described dehydration plant comprises frame, dehydration package, filtrate collection bucket, left oil cylinder and right oil cylinder, and dehydration package is located on the frame, and the dehydration package left and right sides arranges left oil cylinder and right oil cylinder respectively, and the filtrate collection bucket is located at the dehydration package below.
As a kind of preferred version, described dehydration package has 4 groups, and 4 groups of dehydration package are located at filtrate collection bucket top side by side, and the dehydration package that is positioned at the left side contacts with left oil cylinder, and the dehydration package that is positioned at the right side contacts with right oil cylinder; Each dehydration package top is respectively equipped with mud inlet and air intake opening, and mud inlet is connected with head tank by sludge pipe, and air intake opening is by the external air compressor of air duct; Each dehydration package bottom is respectively equipped with filtrate outlet.
The filtrate outlet of described each dehydration package bottom is located in the filtrate collection bucket, and each filtrate outlet place also is respectively equipped with switch valve.
Described filtrate collection bucket is the funnel-shaped structure of taper, and filtrate collection bucket bottom is connected with the filtrate holding tank by the filtrate pipeline.
Described storage mud tower bottom is the funnel structure of taper, and storage mud tower bottom also is provided with stirrer;
Storage mud tower, high pressure sludge pump, head tank, dehydration plant, pressure governor, pressure transducer, retaining valve, mud discharge meter, switch valve and water ga(u)ge be external controller respectively.
When this dewatering performance of sludge test macro uses, its principle is: carry paper mill sludge to dehydration plant to dewater, flow of filtrate after measuring the mud discharge of paper mill sludge before dehydration and dewatering, measure the water percentage of the sludge filter cake that obtains after the dehydration simultaneously, calculate the dehydration indexes of mud, thereby draw the parameters in series of dewatering performance of sludge.Make the dehydration indexes of mud form standardized principle to be: during identical dewatering type (being plate compression), under identical pressure effect, under identical action time, identical filter cake thickness, the identical filter cloth condition, measure the dehydrating effect of mud, the action condition that these are identical, be called the sludge dewatering normalization condition, under this normalization condition, draw comparable dewatering parameter, it is the mass dryness fraction that sludge dewatering reaches under the standard conditions, these numerical value as the dehydration property index of estimating mud, are namely formed the standardization performance parameter.
Can realize a kind of dewatering performance of sludge method of testing by said system, may further comprise the steps:
(1) earlier paper mill sludge is stored in the mud tower, and measures its water percentage, be designated as C
1
(2) normal pressure is divided into low pressure, medium and high pressure is tested respectively, corresponding corresponding normal pressure, the mxm. of set pressure sensor, by the high pressure sludge pump paper mill sludge is pumped to dehydration plant, during paper mill sludge process head tank, pressure transducer detects the force value in the sludge pipe, regulates the setting value of pressure governor according to force value;
(3) the mud discharge meter is metered into the sludge quantity of dehydration plant, is designated as Q
1
(4) when the detected force value of pressure transducer is the mxm. of setting, the time that the high pressure sludge pump continues the pumping paper mill sludge is t
1, close the high pressure sludge pump then, stop the pumping paper mill sludge;
(5) time that stops pumping is t
2The time, the amount of filtrate that water ga(u)ge metering dehydration plant is sent is designated as pre-dehydration total amount V
1
(6) start dehydration plant, the paper mill sludge that enters dehydration plant is dewatered, the dwell time in the dehydration plant is t
3, the amount of filtrate of sending by water ga(u)ge metering dehydration plant is designated as V then
2, form a plurality of sludge filter cakes behind the dehydration of papermaking sludge in the dehydration plant;
(7) take out each sludge filter cake, and measure the water percentage C of each sludge filter cake
1, C
2C
nWith actual weight M
1, M
2M
n, calculate the dehydration indexes K of each sludge filter cake according to following formula
n:
K
n=（M
n/（B×C
n））×V；
Wherein, B is the over dry sludge quality of a plurality of sludge filter cakes, B=M
1/ C
1+ M
2/ C
2+ ... + M
n/ C
n
V is the press dewatering amount, V=V
2-V
1
N is the number of sludge filter cake;
Normal pressure is industrial pressure commonly used, and namely low pressure is 1MPa, and middle pressure is 3MPa, and high pressure is 5MPa.
In the described step (2), when normal pressure was low pressure 1MPa, the mxm. of set pressure sensor was 0.8Mpa; When normal pressure was middle pressure 3MPa, the mxm. of set pressure sensor was 1.6Mpa; When normal pressure was high pressure 5MPa, the mxm. of set pressure sensor was 2MPa.
In the described step (4), the time that the high pressure sludge pump continues the pumping paper mill sludge is t
1Be 5min; In the step (5), stop the time t of pumping
2Be 2min; In the step (6), the dwell time t in the dehydration plant
3Be 30min; In the step (7), the number n of sludge filter cake equates with the number of dehydration package in the dehydration plant.
In the described step (6), the detailed process that the dehydration plant paper mill sludge dewaters is: when starting dehydration plant, left side oil cylinder and right oil cylinder move simultaneously, push each dehydration package to the centre, make the dehydration of papermaking sludge in each dehydration package and form sludge filter cake, filtrate is collected the back by the filtrate collection bucket and is delivered to the filtrate holding tank by the filtrate pipeline.
The utility model has following beneficial effect with respect to prior art:
This dewatering performance of sludge test macro and method are by the flow of filtrate after measuring the mud discharge of paper mill sludge before dehydration and dewatering, measure the water percentage of the sludge filter cake that obtains after the dehydration simultaneously, calculate the dehydration indexes of sludge filter cake, thereby draw the parameters in series of dewatering performance of sludge; Realize the standardized test of dewatering performance of sludge, form standardized data system, be conducive to comparison between the variety classes dewatering performance of sludge and the operating procedure of the standard of formulation, thereby reduce the processing cost of mud recycling.
This dewatering performance of sludge test macro is used in recycling field at paper mill sludge, can realize the low-cost mud mass dryness fraction that improves, provide standardized technical indicator for using paper mill sludge, for low-cost processes paper mill sludge, recycling paper mill sludge provide important research means.
Description of drawings
Fig. 1 is the principle schematic of this dewatering performance of sludge test macro.
Fig. 2 is the structural representation of dehydration plant in this dewatering performance of sludge test macro.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment
A kind of dewatering performance of sludge test macro of present embodiment, as shown in Figure 1, comprise storage mud tower 1, high pressure sludge pump 2, head tank 3, dehydration plant 4 and filtrate holding tank 5, storage mud tower 1, high pressure sludge pump 2, head tank 3 and dehydration plant 4 are connected successively by sludge pipe, and dehydration plant 4 is connected by the filtrate pipeline with filtrate holding tank 5; High pressure sludge pump 2 is provided with pressure governor 6, head tank 3 is provided with pressure transducer 7, the sludge pipe that head tank 3 is connected with dehydration plant 4 is provided with retaining valve 8 and mud discharge meter 9, and the filtrate pipeline that dehydration plant 4 is connected with filtrate holding tank 5 is provided with switch valve 10 and water ga(u)ge 11.
As shown in Figure 2, dehydration plant comprises frame 12, dehydration package 13, filtrate collection bucket 14, left oil cylinder 15 and right oil cylinder 16, dehydration package is located on the frame, and the dehydration package left and right sides arranges left oil cylinder and right oil cylinder respectively, and the filtrate collection bucket is located at the dehydration package below.
Present embodiment is as a kind of preferred version, and dehydration package 13 has 4 groups, and 4 groups of dehydration package are located at filtrate collection bucket top side by side, and the dehydration package that is positioned at the left side contacts with left oil cylinder, and the dehydration package that is positioned at the right side contacts with right oil cylinder; Each dehydration package top is respectively equipped with mud inlet 17 and air intake opening 18, and mud inlet is connected with head tank by sludge pipe 19, and air intake opening is by air duct 20 external air compressor; Each dehydration package bottom is respectively equipped with filtrate outlet.
The filtrate outlet of each dehydration package bottom is located in the filtrate collection bucket, and each filtrate outlet place also is respectively equipped with switch valve.
The filtrate collection bucket is the funnel-shaped structure of taper, and filtrate collection bucket bottom is connected with the filtrate holding tank by the filtrate pipeline.
Storage mud tower bottom is the funnel structure of taper, and storage mud tower bottom also is provided with stirrer, and is more smooth and easy when making the high pressure sludge pump extract paper mill sludge, prevents from stopping up;
Storage mud tower, high pressure sludge pump, head tank, dehydration plant, pressure governor, pressure transducer, retaining valve, mud discharge meter, switch valve and water ga(u)ge be external controller respectively, is controlled action or the switch degree of each element by controller.
When this dewatering performance of sludge test macro uses, its principle is: carry paper mill sludge to dehydration plant to dewater, flow of filtrate after measuring the mud discharge of paper mill sludge before dehydration and dewatering, measure the water percentage of the sludge filter cake that obtains after the dehydration simultaneously, calculate the dehydration indexes of sludge filter cake, thereby draw the parameters in series of dewatering performance of sludge.Make the dehydration indexes of mud form standardized principle to be: during identical dewatering type (being plate compression), under identical pressure effect, under identical action time, identical filter cake thickness, the identical filter cloth condition, measure the dehydrating effect of mud, the action condition that these are identical, be called the sludge dewatering normalization condition, under this normalization condition, draw comparable dewatering parameter, it is the mass dryness fraction that sludge dewatering reaches under the standard conditions, these numerical value as the dehydration property index of estimating mud, are namely formed the standardization performance parameter.
Present embodiment is realized a kind of dewatering performance of sludge method of testing by said system, may further comprise the steps:
(1) earlier paper mill sludge is stored in the mud tower, and measures its water percentage, be designated as C
1
(2) normal pressure is divided into low pressure, medium and high pressure is tested respectively, corresponding corresponding normal pressure, the mxm. of set pressure sensor, by the high pressure sludge pump paper mill sludge is pumped to dehydration plant, during paper mill sludge process head tank, pressure transducer detects the force value in the sludge pipe, regulates the setting value of pressure governor according to force value; In the pumping process, the appearance of pressure transducer mxm. need be held time and is t
1, when not reaching this standard, increase pressure by regulating pressure governor, if when the pressure transducer mxm. surpasses setting value, reduce pressure by regulating pressure governor;
(3) the mud discharge meter is metered into the sludge quantity of dehydration plant, is designated as Q
1
(4) when the detected force value of pressure transducer is the mxm. of setting, the high pressure sludge pump continues the time t of pumping paper mill sludge
1Be 5min, close the high pressure sludge pump then, stop the pumping paper mill sludge;
(5) stop the time t of pumping
2Be 2min, the amount of filtrate that water ga(u)ge metering dehydration plant is sent is designated as pre-dehydration total amount V
1
(6) start dehydration plant, the paper mill sludge that enters dehydration plant is dewatered, the dwell time in the dehydration plant is t
3, the amount of filtrate of sending by water ga(u)ge metering dehydration plant is designated as V then
2, form a plurality of sludge filter cakes behind the dehydration of papermaking sludge in the dehydration plant;
Wherein, the detailed process that the dehydration plant paper mill sludge dewaters is: when starting dehydration plant, left side oil cylinder and right oil cylinder move simultaneously, push each dehydration package to the centre, make the dehydration of papermaking sludge in each dehydration package and form sludge filter cake, filtrate is collected the back by the filtrate collection bucket and is delivered to the filtrate holding tank by the filtrate pipeline; In this process, oil hydraulic system control oil cylinder maximum pressure is 2MPa, because the sludge filter cake compression area in the dehydration plant is the twice of oil cylinder area, so under the oil pressure effect of 2MPa, the pressurized pressure of sludge filter cake is 1MPa, when oil cylinder working-pressure reaches maximal value, dwell time t
3Be 30min;
(7) take out each sludge filter cake, and measure the water percentage C of each sludge filter cake
1, C
2C
nWith actual weight M
1, M
2M
n, calculate the dehydration indexes K of each sludge filter cake according to following formula
n:
K
n=（M
n/（B×C
n））×V；
Wherein, B is the over dry sludge quality of a plurality of sludge filter cakes, B=M
1/ C
1+ M
2/ C
2+ ... + M
n/ C
n
V is the press dewatering amount, V=V
2-V
1
N is the number of sludge filter cake;
Normal pressure is industrial pressure commonly used, and namely low pressure is 1MPa, and middle pressure is 3MPa, and high pressure is 5MPa.
In the present embodiment, in the step (2), getting normal pressure earlier is low pressure 1MPa, and the mxm. of set pressure sensor is 0.8Mpa; Owing in the dehydration plant of present embodiment 4 groups of dehydration package are arranged, so the final sludge filter cake that forms has 4, final dehydration indexes and other parameter of calculating of step (7) is as shown in the table:
Wherein, Q
2For being measured by the mud discharge meter, the actual volume that remains in the paper mill sludge that does not enter dehydration plant in the sludge pipe, this value is constant.
Getting normal pressure then is middle pressure 3MPa, and the mxm. of set pressure sensor is 1.6Mpa; The dehydration indexes of 4 sludge filter cakes that form and other CALCULATION OF PARAMETERS method are identical during with low pressure;
Getting normal pressure again is high pressure 5MPa, and the mxm. of set pressure sensor is 2MPa; The dehydration indexes of 4 sludge filter cakes that form and other CALCULATION OF PARAMETERS method are identical during with low pressure.
The dewatering performance of sludge index of Xing Chenging is respectively at last:
The low pressure of 5mm sludge filter cake dewater in advance index, low pressure press dewatering index, middle pressure press dewatering exponential sum high-pressure compressing dehydration index;
The low pressure of 10mm sludge filter cake dewater in advance index, low pressure press dewatering index, middle pressure press dewatering exponential sum high-pressure compressing dehydration index;
The low pressure of 20mm sludge filter cake dewater in advance index, low pressure press dewatering index, middle pressure press dewatering exponential sum high-pressure compressing dehydration index;
The low pressure of 30mm sludge filter cake dewater in advance index, low pressure press dewatering index, middle pressure press dewatering exponential sum high-pressure compressing dehydration index.
Different types of paper mill sludge tested comparing after drawing above-mentioned dewatering performance of sludge index, can learn the dewatering of various types of paper mill sludge.
As mentioned above, just can realize the utility model preferably, above-described embodiment is preferred embodiment of the present utility model only, is not to limit practical range of the present utility model; Be that all equalizations of doing according to the utility model content change and modification, all contained by the utility model claim scope required for protection.
Claims (6)
1. dewatering performance of sludge test macro, it is characterized in that, comprise storage mud tower, high pressure sludge pump, head tank, dehydration plant and filtrate holding tank, storage mud tower, high pressure sludge pump, head tank are connected by sludge pipe successively with dehydration plant, and dehydration plant is connected by the filtrate pipeline with the filtrate holding tank; The high pressure sludge pump is provided with pressure governor, head tank is provided with pressure transducer, the sludge pipe that head tank is connected with dehydration plant is provided with retaining valve and mud discharge meter, and dehydration plant and filtrate are collected tank connected filtrate pipeline and is provided with switch valve and water ga(u)ge.
2. dewatering performance of sludge test macro according to claim 1, it is characterized in that, described dehydration plant comprises frame, dehydration package, filtrate collection bucket, left oil cylinder and right oil cylinder, dehydration package is located on the frame, the dehydration package left and right sides arranges left oil cylinder and right oil cylinder respectively, and the filtrate collection bucket is located at the dehydration package below.
3. dewatering performance of sludge test macro according to claim 2, it is characterized in that described dehydration package has 4 groups, 4 groups of dehydration package are located at filtrate collection bucket top side by side, the dehydration package that is positioned at the left side contacts with left oil cylinder, and the dehydration package that is positioned at the right side contacts with right oil cylinder; Each dehydration package top is respectively equipped with mud inlet and air intake opening, and mud inlet is connected with head tank by sludge pipe, and air intake opening is by the external air compressor of air duct; Each dehydration package bottom is respectively equipped with filtrate outlet.
4. dewatering performance of sludge test macro according to claim 3 is characterized in that, the filtrate outlet of described each dehydration package bottom is located in the filtrate collection bucket, and each filtrate outlet place also is respectively equipped with switch valve.
5. dewatering performance of sludge test macro according to claim 2 is characterized in that, described filtrate collection bucket is the funnel-shaped structure of taper, and filtrate collection bucket bottom is connected with the filtrate holding tank by the filtrate pipeline.
6. dewatering performance of sludge test macro according to claim 1 is characterized in that, described storage mud tower bottom is the funnel structure of taper, and storage mud tower bottom also is provided with stirrer;
Storage mud tower, high pressure sludge pump, head tank, dehydration plant, pressure governor, pressure transducer, retaining valve, mud discharge meter, switch valve and water ga(u)ge be external controller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712975 CN203037648U (en) | 2012-12-20 | 2012-12-20 | Sludge dewatering performance measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712975 CN203037648U (en) | 2012-12-20 | 2012-12-20 | Sludge dewatering performance measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037648U true CN203037648U (en) | 2013-07-03 |
Family
ID=48689759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220712975 Expired - Fee Related CN203037648U (en) | 2012-12-20 | 2012-12-20 | Sludge dewatering performance measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203037648U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063817A (en) * | 2012-12-20 | 2013-04-24 | 华南理工大学 | System and method of measuring sludge dewatering performance |
-
2012
- 2012-12-20 CN CN 201220712975 patent/CN203037648U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063817A (en) * | 2012-12-20 | 2013-04-24 | 华南理工大学 | System and method of measuring sludge dewatering performance |
| CN103063817B (en) * | 2012-12-20 | 2015-07-01 | 华南理工大学 | System of measuring sludge dewatering performance |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20151220 |
|
| EXPY | Termination of patent right or utility model |