CN210855783U - Sludge on-line conditioning and concentrating system - Google Patents
Sludge on-line conditioning and concentrating system Download PDFInfo
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- CN210855783U CN210855783U CN201921714535.XU CN201921714535U CN210855783U CN 210855783 U CN210855783 U CN 210855783U CN 201921714535 U CN201921714535 U CN 201921714535U CN 210855783 U CN210855783 U CN 210855783U
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Abstract
The utility model relates to a concentrated system is taked care of on line to mud, include along mud feeding direction and pass through mud conditioning tank (8), sludge thickening tank (9) and plate and frame filter press (13) that the mud pipeline connected gradually, sludge conditioning tank (8) divide into coagulating basin (3) and flocculation basin (4) along mud feeding direction, and coagulating basin (3) are connected with the coagulant and throw feeder apparatus (6), and flocculation basin (4) are connected with the flocculating agent and throw feeder apparatus (7), be equipped with sludge thickening machine (5) in sludge thickening tank (9). Compared with the prior art, the utility model discloses can realize online accurate realization mud and mix and take care of, reduce the volume that power and gravity concentrate the pond are taked care of to mud moisture content after the concentration has been improved, solved mud and taken care of the current situation that must adopt big volumetric mud concentrate pond and take care of pond, powerful agitator, big filter area's sheet frame filter-pressing equipment, thereby reduced the investment of follow-up dewatering equipment.
Description
Technical Field
The utility model relates to a sludge treatment field, concretely relates to concentrated system is taked care of on line to mud.
Background
Because present environmental protection requirement is more and more strict, and each sewage factory requires more and more high to the mud moisture content, under the general condition, traditional sludge dewatering main part step divide into concentration + two major steps of dehydration: the concentration process section usually adopts gravity concentration or mechanical concentration; according to the dehydration process, according to the requirement of the water content, a stacked screw, a centrifugal machine or a plate-and-frame dehydrator is adopted, so that the water content of the plate-and-frame dehydrator, particularly a diaphragm plate-and-frame dehydrator, can be lower, the plate-and-frame dehydrator is also dehydration process equipment which is widely applied in the current market, and the derivative processes of various plate-and-frame equipment are also widely applied.
The common sludge dewatering process at present comprises the following steps: discharging sludge in the process section, concentrating sludge, conditioning sludge in a sludge conditioning tank, press-filtering by plate and frame, and transporting sludge cakes outside. However, the plate-and-frame filter pressing belongs to a batch process, and the feeding mode is changed according to the pressure, so that the flow stability cannot be ensured, and the continuous and stable online dosing of the sludge conditioning agent cannot be realized. Therefore, a sludge conditioning tank which can at least meet the requirement of plate frame batch operation must be arranged behind the sludge concentration tank.
Because the plate-and-frame filter pressing is operated in batch mode, the continuous operation is not the same as that of a centrifugal filter press or a stacked screw dehydrator, and the online dosing, mixing and conditioning can be realized. The plate-and-frame filter pressing can not realize on-line mixing, so that the sludge conditioning also needs to adopt a batch process, and therefore, a large-volume sludge concentration tank, a conditioning tank and a plate-and-beam filter press, a high-power sludge concentrator matched with the sludge concentration tank and a high-power conditioning stirrer matched with the sludge conditioning tank are required to be configured.
The patent CN105461189A discloses a combined sludge deep dehydration system and a deep dehydration process, wherein the dehydration system comprises a sludge feeding unit, a sludge conditioning and modifying unit and a filter-pressing and dehydration unit, the sludge feeding unit comprises a sludge diluting and homogenizing tank and a sludge mixing and conveying assembly, the sludge diluting and homogenizing tank is connected with the sludge conditioning and modifying unit through the sludge mixing and conveying assembly, and the sludge conditioning and modifying unit is connected with the filter-pressing and dehydration unit; the deep dehydration process comprises the following steps: (1) treating the sludge by a sludge feeding unit to obtain sludge with water content within a certain range; (2) conveying the sludge obtained in the step (1) to a sludge conditioning modification unit, and adding a conditioner for conditioning; (3) and (3) conveying the sludge obtained in the step (2) to a filter pressing dehydration unit for treatment. The sludge conditioning and modifying unit in the system has insignificant increase of the precipitation performance of sewage, which results in large volume and high power consumption of the filter pressing and dehydrating unit arranged behind the sludge conditioning and modifying unit.
Patent CN102001812B discloses a sludge deep dehydration process, which comprises the following steps: and (2) carrying out flocculation reaction on sludge with the water content of more than 96% generated after sewage treatment, overflowing the sludge after the flocculation reaction to a thickener for concentration and dehydration, pulping and conditioning in a pulping machine after concentration and dehydration, conveying the sludge to a deep dehydrator for deep dehydration by a high-pressure slurry pump, finally conveying the sludge to a crusher for crushing the sludge into powder or blocks, and conveying the crushed sludge to a boiler for incineration treatment or recycling. In the dehydration process, only the flocculation operation is carried out on the sludge, the separation of the sludge and water cannot be ensured, and the subsequent concentration treatment is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a concentrated system is taked care of on line to mud in order to solve above-mentioned problem, can realize online accurate realization mud mixture and take care of, reduce the volume that power and gravity concentrated pond are taked care of to mud moisture content after the concentration has been improved, solved mud and taken care of must adopt big volumetric mud concentrated pond and take care of the current situation of pond, powerful agitator, big filter area's sheet frame filter-pressing equipment, thereby reduced the investment of follow-up dewatering equipment.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a concentrated system is taked care of on line to mud, includes along mud feeding direction and passes through sludge conduit sludge recuperating pond, sludge thickening tank and the filter press that connects gradually, sludge recuperating pond is divided into coagulating basin and flocculation basin along mud feeding direction, and the coagulating basin is connected with the coagulant and throws feeder apparatus, and the flocculation basin is connected with the flocculating agent and throws feeder apparatus, be equipped with sludge thickening machine in the sludge thickening tank.
Furthermore, be equipped with the coagulation agitator in the coagulation basin, be equipped with the flocculation agitator in the flocculation basin, the agitator can accelerate the dissolution and the distribution of coagulant and flocculating agent to be convenient for mud thoughtlessly congeals and flocculates better more fast.
Furthermore, the flocculating agent added by the flocculating agent adding device is cationic Polyacrylamide (PAM), the flocculating agent has various active groups, can be compatible with a plurality of substances and can form hydrogen bonds through adsorption, mainly flocculates colloid with negative charges, has the functions of turbidity removal, decoloration, adsorption, adhesion and the like, is particularly suitable for the dehydration treatment of municipal sewage, municipal sludge, paper sludge and other industrial sludge, and the PAM is added to improve the flocculation performance of the sludge and better realize sludge-water separation.
Furthermore, the sludge concentration tank is connected with a coagulant adding device and a flocculating agent adding device, if the flocculation state of the sludge after coming out of the sludge conditioning tank can not meet the dehydration requirement, fine adjustment can be carried out in the sludge concentration tank, and the property of sludge conditioning can meet the requirement of plate-and-frame filter pressing.
Furthermore, the side wall of the sludge concentration tank is provided with at least one overflow port for supernatant, the overflow port is arranged at the opposite side of the sludge conditioning tank, the sludge after being conditioned by the sludge and concentrated by gravity can be divided into the supernatant and the sludge with low water content, if the concentration effect is better, the supernatant can be led out from the overflow port according to the composite requirement, and the overflow port is arranged at the opposite side of the sludge conditioning tank, so that the qualified supernatant is prevented from being polluted by the continuously fed sludge.
Further, the overflow port comprises a first overflow port and a second overflow port, the height of the first overflow port is higher than that of the second overflow port, and when the suspended matters in the supernatant discharged from the overflow port are lower than 300ppm (which can be determined by measuring with a sludge concentration meter), the supernatant can be directly discharged; however, if the suspended matter concentration in the supernatant is higher than 300ppm, the concentration is considered to be poor, and the discharge of the supernatant is not recommended. Set up a plurality of overflow mouths and be under the relatively poor condition of concentration effect, only open the overflow mouth of high liquid level, and under the relatively good condition of concentration effect, can open the overflow mouth of low liquid level, further discharge supernatant reduces the filter capacity of sheet frame to improve filtration efficiency greatly.
Furthermore, a sludge concentration meter and a sludge flowmeter are arranged on a sludge pipeline arranged in front of the sludge conditioning tank, so that the concentration and the flow of the sludge can be obtained in real time, and the flow of the sludge can be increased or decreased according to the concentration effect of the supernatant.
Furthermore, the coagulant adding device and the flocculant adding device are controlled in a frequency conversion mode, are integrated with the sludge concentration meter and the sludge flowmeter, and realize accurate addition of the chemicals according to real-time data acquired by the sludge concentration meter and the flowmeter and background operation.
Furthermore, a sludge screw pump is arranged between the sludge concentration tank and the plate-and-frame filter press, and the sludge screw pump conveys sludge from the sludge concentration tank into the plate-and-frame filter press, so that the dehydration of the sludge is effectively realized, and the filtering area and the filtering time of the plate frame are reduced by improving the feeding sludge concentration of the plate frame.
The utility model discloses with former order for sludge concentration-sludge conditioning adjustment for the concentrated order of mud on-line conditioning-mud gravity, and with sludge conditioning pool divide into coagulation tank and flocculation basin along mud feed direction, calculate the volume of throwing of coagulant and flocculating agent on line according to row mud flow and sludge concentration, realize accurate control, make mud have good settling properties, then carry out gravity concentration in sludge concentration tank, and can throw coagulant and/or flocculating agent in sludge concentration tank according to concentrated effect according to the circumstances, realize the best gravity concentration effect, utilize plate and frame filter press to carry out last dehydration filtration at last.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the sludge conditioning tank is divided into a coagulation tank and a flocculation tank, so that the volume of the sludge conditioning tank can be reduced, an additional sludge conditioning tank is not required (a large amount of civil engineering cost is saved), a high-power sludge mixing and stirring device is not required, the online mixing and stirring requirement can be realized only by 0.75-1.1kw of power, and the stirring power can be reduced by at least more than 80% of power consumption;
(2) after the sludge is subjected to online conditioning, the sludge enters a sludge concentration tank, the concentration of the sludge is greatly increased and can reach 4-6%, and the volume of the concentration tank can be reduced by at least more than 30%;
(3) the concentration of the sludge which is concentrated after being conditioned is 4-6%, a plate-and-frame filter press is configured according to the concentration, and the model selection of the filter press can be reduced by more than 50% due to the improvement of the sludge inlet concentration;
(4) the adding amount of the sludge conditioning agent is calculated on line according to the sludge discharge flow and the sludge concentration, so that accurate control can be realized;
(5) even if the traditional process of sludge conditioning after sludge concentration is adopted, the on-line sludge conditioning process can still be adopted, and the sludge conditioning and stirring power can also be greatly reduced.
Drawings
FIG. 1 is a schematic structural diagram of an online sludge conditioning and concentrating system.
In the figure: 1-a sludge flowmeter; 2-sludge concentration meter; 3-a coagulation tank; 4-a flocculation tank; 5-sludge thickener; 6-a coagulant adding device; 7-a flocculating agent adding device; 8-a sludge conditioning tank; 9-sludge concentration tank; 10-a first overflow port; 11-a second overflow; 12-sludge screw pump; 13-plate and frame filter press.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
Referring to fig. 1, the online sludge conditioning and concentrating system comprises a sludge conditioning tank 8, a sludge concentrating tank 9 and a plate-and-frame filter press 13 which are sequentially connected through a sludge pipeline along a sludge feeding direction, wherein the sludge conditioning tank 8 is divided into a coagulation tank 3 and a flocculation tank 4 along the sludge feeding direction, the coagulation tank 3 is connected with a coagulant adding device 6, the flocculation tank 4 is connected with a flocculant adding device 7, and a sludge concentrating machine 5 is arranged in the sludge concentrating tank 9.
A coagulation stirrer is arranged in the coagulation tank 3, and a flocculation stirrer is arranged in the flocculation tank 4. The flocculating agent added by the flocculating agent adding device 7 is cationic polyacrylamide.
The sludge concentration tank 9 is connected with a coagulant adding device 6 and a flocculating agent adding device 7.
The side wall of the sludge concentration tank 9 is provided with a first overflow port 10 and a second overflow port 11 which are two overflow ports, the overflow ports are arranged at the opposite sides of the sludge conditioning tank 8, wherein the height of the first overflow port 10 is higher than that of the second overflow port 11.
A sludge concentration meter 2 and a sludge flowmeter 1 are arranged on the sludge pipeline in front of the sludge conditioning tank 8. The coagulant adding device 6 and the flocculating agent adding device 7 are controlled by frequency conversion, are integrated with the sludge concentration meter 2 and the sludge flowmeter 1, and realize the accurate adding of the coagulant and the flocculating agent according to the real-time data acquired by the sludge concentration meter and the flowmeter and the background operation.
A sludge screw pump 12 is arranged between the sludge concentration tank 9 and the plate-and-frame filter press 13.
An online conditioning and concentrating process for sludge, which comprises the following steps: the sludge is firstly introduced into a sludge conditioning tank 8 to be sequentially coagulated and flocculated, a coagulant adding device 6 is used for adding coagulants into a coagulation tank 3 in a coagulation stage, a flocculating agent is added into a flocculation tank 4 in a flocculation stage, the coagulated and flocculated sludge enters a sludge concentration tank 9 for gravity concentration, and finally the sludge enters a plate and frame filter press 13 for dehydration.
The design sludge yield of a certain printing and dyeing project is 1.5T/d absolute dry sludge amount, and is designed according to the specification, the utility model discloses dispose as follows before the implementation
1. Designing two sludge thickening tanks with the diameter of 8m and configuring a sludge thickener;
2. is provided with a 50-60m3The sludge conditioning pool is provided with a stirrer of 11 kw;
3. at least 1 plate and frame filter press of square meter 250 is configured;
will the utility model discloses in using the sewage treatment system of a certain printing and dyeing mill, obtain following result:
1. through leading sludge conditioning pond, reduce the power of original sludge agitator to 2.2kw from 11kw, according to operation 12h every day, can save the charges of electricity 38500KWH annually:
2. through the utility model discloses an on-line coagulant adding device and flocculating agent adding device, the sludge conditioning tank is made by 60m3Reduced to 10m3The volume is reduced by 83%; the diameter of the sludge concentration tank is reduced from 8m to 6m, and the volume is reduced by 40%; the filtering area of the plate-and-frame filter press is 250m2Reduced to 150m2The filtration area is reduced by 40%.
3. The contribution of direct economic benefits of civil pond volume reduction and equipment investment exceeds 20 million, and economic benefits brought by the reduction of the occupied area are not calculated.
Comparative example 1
The sludge treatment is carried out by adopting the existing sludge system with the sequence of sludge concentration-sludge conditioning, wherein the concentration of the sludge to be treated is 1 percent. Firstly, a sludge concentration tank must be designed according to specifications to meet the solid flux requirement of sludge yield and the requirement of sludge concentration time, and at least 2 sludge concentration tanks (1 for 1) with the diameter of 7-8m are required to be arranged according to the example that the absolute dry sludge amount (without water) is 1.5T/d, and 2 concentration machines with the diameter of 6-8m are required to be arranged in the sludge concentration tanks.
Because the sludge concentration can only reach 2-3% under the conventional condition of gravity concentration, a plate and frame filter press is required to be configured according to the actual sludge concentration, and at least 1 plate and frame filter press with the filtering area of 200 square meters and 250 square meters is required to be configured according to the design of operating 1 batch per day.
Taking a plate-and-frame device with a filtering area of 250 square meters as an example for calculation, each batch can be filtered to obtain 3.75 tons of dehydrated sludge (the absolute dry sludge amount is 1.5T) with the water content of 60 percent (the sludge accounts for 40 percent) by pressure filtration, and the sludge volume of 3 percent after being converted into concentration is about 50m3Thus at least one effective volume of 50-60m is required3The sludge conditioning tank can realize the conditioning of sludge in one batch, and the mixing and stirring power of the sludge conditioning tank is at least 11kw calculated according to the concentration of 3 percent of sludge.
Because a certain time (calculated according to 1 hour) is needed for transferring the sludge from the concentration tank to the conditioning tank, and stirring and mixing (calculated according to 30 min) are continuously carried out in the dosing coagulation stage, the sludge entering before and the added medicament are stirred at power consumption although the reaction is finished, and therefore, the waste of the operation power exists.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (9)
1. The utility model provides a concentrated system is taked care of on line to mud, its characterized in that includes along mud feeding direction sludge recuperating tank (8), sludge thickening tank (9) and plate and frame filter press (13) that connect gradually through the mud pipeline, sludge recuperating tank (8) divide into coagulating basin (3) and flocculation basin (4) along mud feeding direction, and coagulating basin (3) are connected with the coagulant and throw feeder apparatus (6), and flocculation basin (4) are connected with the flocculant and throw feeder apparatus (7), be equipped with sludge thickening machine (5) in sludge thickening tank (9).
2. The system for on-line conditioning and concentrating of sludge according to claim 1, wherein a coagulation stirrer is arranged in the coagulation tank (3), and a flocculation stirrer is arranged in the flocculation tank (4).
3. The on-line sludge conditioning and concentrating system according to claim 1, wherein the flocculant added by the flocculant adding device (7) is cationic polyacrylamide.
4. The on-line sludge conditioning and concentrating system according to claim 1, wherein the sludge concentration tank (9) is connected with a coagulant adding device (6) and a flocculant adding device (7).
5. The on-line sludge conditioning and concentrating system according to claim 1, wherein at least one overflow port for supernatant is formed in the side wall of the sludge concentrating tank (9), and the overflow port is arranged on the opposite side of the sludge conditioning tank (8).
6. The system for on-line conditioning and concentrating of sludge as claimed in claim 5, wherein the overflow port comprises a first overflow port (10) and a second overflow port (11), and the first overflow port (10) is higher than the second overflow port (11).
7. The system for on-line conditioning and concentrating of sludge as claimed in claim 1, wherein a sludge concentration meter (2) and a sludge flow meter (1) are arranged on a sludge pipeline in front of the sludge conditioning tank (8).
8. The on-line sludge conditioning and concentrating system according to claim 7, wherein the coagulant adding device (6) and the flocculant adding device (7) are controlled by frequency conversion and integrated with the sludge concentration meter (2) and the sludge flowmeter (1).
9. The on-line sludge conditioning and concentrating system as claimed in claim 1, wherein a sludge screw pump (12) is arranged between the sludge concentrating tank (9) and the plate-and-frame filter press (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921714535.XU CN210855783U (en) | 2019-10-14 | 2019-10-14 | Sludge on-line conditioning and concentrating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921714535.XU CN210855783U (en) | 2019-10-14 | 2019-10-14 | Sludge on-line conditioning and concentrating system |
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| CN210855783U true CN210855783U (en) | 2020-06-26 |
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| CN201921714535.XU Active CN210855783U (en) | 2019-10-14 | 2019-10-14 | Sludge on-line conditioning and concentrating system |
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