CN210825900U

CN210825900U - A filter-pressing system for sludge treatment

Info

Publication number: CN210825900U
Application number: CN201921376403.0U
Authority: CN
Inventors: 王广学; 李展洪; 齐鹏飞; 高善光
Original assignee: Jiangmen Huajie Solid Waste Treatment Co ltd
Current assignee: Jiangmen Huajie Solid Waste Treatment Co ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-06-23
Anticipated expiration: 2029-08-22

Abstract

The utility model discloses a filter-pressing system for sludge treatment, a serial communication port, including opening mud device, dispensing tank, conditioning tank and plate and frame filter press, wherein open mud device pass through the conveyer pipe with conditioning tank connects, dispensing tank pass through the conveyer pipe with conditioning tank connects, conditioning tank pass through the conveyer pipe with plate and frame filter press connects. The utility model discloses operating stability is strong, and environmental protection and energy saving effectively improve the dehydration effect of mud mechanical filter-pressing, productivity gain.

Description

A filter-pressing system for sludge treatment

Technical Field

The utility model relates to a sludge treatment technical field specifically relates to a filter-pressing system for sludge treatment.

Background

With the development of the paper industry and the construction of pollution prevention and control facilities, sludge generated after the paper-making wastewater is treated by treatment facilities becomes a new pollution source, and the pollution source is continuously increased along with the expansion of the production scale of the paper-making industry. The sludge of waste paper papermaking enterprises is mainly sourced from two sources: the method comprises the following steps of firstly, sludge produced in screening and purifying and other working sections in the process of papermaking by waste paper is mainly non-fibrous impurities, has complex components and mainly comprises organic matters and inorganic matters; and the other is biological sludge produced in the papermaking wastewater treatment process, and the main components of the biological sludge are substances such as fine fibers, lignin, nitrogen, phosphorus, potassium and the like. At present, two treatment methods are mainly used, the first method is direct landfill, and the direct landfill not only needs a landfill site, but also pollutes the environment; the second is to dehydrate the mud, mix with the coal, then send into the boiler burning, often adopt the pressure filter to directly dehydrate the mud among the prior art, wherein the plate and frame pressure filter is the equipment commonly used in chemical industry, and the filtration driving force is big, and mud cake moisture content is lower, advances mud, goes out mud intermittent, and productivity ratio is lower. Therefore, it is necessary to increase the construction strength of sludge treatment facilities, select a scientific and reasonable sludge dewatering method and treatment process and improve the treatment efficiency.

Disclosure of Invention

The utility model aims at solving the prior art not enough and the operating stability who provides is strong, environmental protection and energy saving, effectively improves the dehydration effect of mud machinery filter-pressing, productivity gain's a filter-pressing system for sludge treatment.

The utility model discloses an adopt following technical solution to realize above-mentioned purpose:

a filter pressing system for sludge treatment is characterized by comprising a sludge opening device, a dispensing tank, a conditioning tank and a plate-and-frame filter press, wherein the sludge opening device is connected with the conditioning tank through a conveying pipe;

the mud opening device comprises a blanking pool which is obliquely arranged and a plurality of mud opening pools which are connected with the output end of the blanking pool and are in parallel connection with each other, wherein the output end of the blanking pool is provided with a grid, the upper part of the mud opening pool is provided with a water inlet pipe, and the inside of the mud opening pool is provided with a stirring device;

the dispensing tank comprises a dispensing tank main body, a water inlet pipe is arranged at the upper part of the dispensing tank main body, and a stirring device is arranged in the dispensing tank main body along the vertical direction;

a stirring device is arranged inside the conditioning tank;

the plate and frame filter press output is connected with the drain pipe, the drain pipe is provided with the branch pipeline, the main line for the backward flow section with open the mud pit and connect for former mud dilutes, divide the pipeline to be connected with external sewage treatment system for the section of arranging in line.

As a further explanation of the above scheme, the grid comprises a coarse grid, a middle grid and a fine grid which are sequentially arranged, wherein the intervals of grid bars among the coarse grid, the middle grid and the fine grid are sequentially reduced, and the sludge sequentially passes through the coarse grid, the middle grid and the fine grid to realize multi-stage filtration.

Further, the inclination angle of the blanking pool is 30-60 degrees.

Further, agitating unit includes driving motor, (mixing) shaft and multilayer agitator, the multilayer agitator is followed the (mixing) shaft axial distributes and is fixed in respectively on the (mixing) shaft.

Further, the number of layers of the multilayer stirrer is preferably 3, and the multilayer stirrer comprises an upper layer stirrer, a middle layer stirrer and a lower layer stirrer.

Further, the multi-layer stirrer is a slurry, and the inclination angle of each slurry relative to the horizontal plane is 30-60 degrees.

Furthermore, the upper layer stirrer, the middle layer stirrer and the lower layer stirrer are different from the radius of the stirring shaft in length, the radius of the middle layer stirrer is long, the radius of the upper layer stirrer and the radius of the lower layer stirrer are short, and the middle layer stirrer and the lower layer stirrer are in a spindle-shaped structure with narrow ends and wide middle, or the radius of the upper layer stirrer, the middle layer stirrer and the lower layer stirrer are sequentially increased/decreased in an increasing manner and are in a trapezoidal structure.

Further, the plate and frame filter press comprises a frame, a main beam arranged in the horizontal direction is arranged on the frame, a plurality of filter pressing plates are connected to the main beam in a sliding mode, filter cloth is connected between the filter pressing plates, a left baffle and a right baffle are arranged at two ends of the main beam respectively, a hydraulic transmission system capable of moving to be close to and extruding the filter pressing plates is arranged on the left baffle, a spraying device for cleaning the filter pressing plates and the filter cloth is arranged on the right baffle, and the spraying device comprises a hose connected with tap water and a nozzle connected to the output end of the hose.

Furthermore, flow control valves are respectively arranged at the joints of the conveying pipe and the mud opening device, the dispensing tank and the conditioning tank.

Furthermore, a hydraulic pump assembly is arranged in the drain pipe to provide power for the flow of water, and a control valve is arranged at the branch of the drain pipe to control the water flow to enter the backflow section or the direct discharge section.

Furthermore, flow control valve, hydraulic pump subassembly all with PLC controller electric connection, realize system automation control.

The utility model adopts the beneficial effect that above-mentioned technical solution can reach is:

1. the utility model discloses a slope setting can slow down the speed that mud falls to the mud-opening pond at the unloading pond of mud-opening device, prevents that mud from piling up in the mud-opening pond and influencing stirring effect, sets up multistage grid in the unloading pond simultaneously, can effectively screen solid rubbish such as branch, stone that mix with in the mud according to the volume size of impurity, plays multistage filtration effect, when preventing that the grid is blockked up to the bold impurity, makes things convenient for the staff to classify the clearance to impurity; the flow control valve in agitating unit cooperation inlet tube, according to the mud quality control inflow of handling at every turn, the multilayer agitator carries out intensive mixing to mud and dilutes, is favorable to improving the effect that follow-up mud chemical conditioning.

2. This practicality is through setting up the jar of dispensing, and the flow control valve that sets up in the cooperation inlet tube mixes, stirs the medicament according to the medicament quality control inflow of unloading at every turn, and the cooperation agitating unit guarantees that the medicament reaches the best concentration condition that the chemistry was taked care of, can quantitatively and qualitatively dispense, can prevent that the artifical material of throwing from appearing the quantity error, effectively improves the medicament and puts in the precision, can avoid again that the medicament caking appears or distributes inhomogeneously.

3. The conditioning tank receives the muddy water of the sludge opening device and the medicament in the dispensing tank, and the inside stirring device fully stirs the muddy water and the medicament in the tank body, so that the sludge particles are flocculated, the structure is enhanced, and the dewatering effect of the plate and frame filter press is effectively improved.

4. The mud press filtration water that plate and frame filter press produced (including the filter cloth washs water) is through the lateral pipeline of drain pipe, and partly flows back to the mud pond of opening through the backward flow section and is used for former mud to dilute, and remaining partial sewage carries external sewage treatment system through the straight section and handles, and not only the water economy resource reaches waste water reuse's purpose, and sewage obtains scientific and effective processing moreover, and is friendly to the environment.

Drawings

Fig. 1 is a schematic view of the present invention.

Fig. 2 is a schematic diagram of the mud dredging device.

Fig. 3 is a top view of the mud ripping apparatus.

Fig. 4 is a schematic structural view of a dispensing canister.

Fig. 5 is a schematic diagram of the structure of the conditioning tank.

Figure 6 is a schematic diagram of a plate and frame filter press.

Description of reference numerals: 1. the device comprises a mud opening device, 1-1 parts of a blanking pool, 1-2 parts of a mud opening pool, 1-3 parts of a grid, 2 parts of a dispensing tank, 3 parts of a conditioning tank, 4 parts of a plate-and-frame filter press, 4-1 parts of a frame, 4-2 parts of a main beam, 4-3 parts of a filter pressing plate, 4-4 parts of a left baffle, 4-5 parts of a right baffle, 4-6 parts of a hydraulic transmission system, 4-7 parts of a spraying device, 5 parts of a conveying pipe, 6 parts of a water inlet pipe, 7 parts of a stirring device, 7-1 parts of a driving motor, 7-2 parts of a stirring shaft, 7-3 parts of a multilayer stirrer, 8 parts of a drain pipe, 8-1 parts of a backflow section, 8-2 parts.

Detailed Description

The technical solution is described in detail with reference to specific embodiments below.

As shown in fig. 1-2, the utility model relates to a filter pressing system for sludge treatment, which is characterized in that the filter pressing system comprises a sludge opening device 1, a dispensing tank 2, a conditioning tank 3 and a plate-and-frame filter press 4, wherein the sludge opening device 1 is connected with the conditioning tank 3 through a conveying pipe 5, the dispensing tank 2 is connected with the conditioning tank 3 through a conveying pipe 5, and the conditioning tank 3 is connected with the plate-and-frame filter press 4 through a conveying pipe 5; the mud opening device 1 comprises an obliquely arranged blanking pool 1-1 and a plurality of mud opening pools 1-2 which are connected with the output end of the blanking pool and are in parallel connection with each other, wherein the output end of the blanking pool is provided with a grating 1-3, the upper part of the mud opening pool is provided with a water inlet pipe 6, and the inside of the mud opening pool is provided with a stirring device 7; the dispensing tank 2 comprises a dispensing tank main body, a water inlet pipe 6 is arranged at the upper part of the dispensing tank main body, and a stirring device 7 is arranged in the dispensing tank main body along the vertical direction; a stirring device 7 is arranged in the conditioning tank 3; the output end of the plate-and-frame filter press 4 is connected with a drain pipe 8, the drain pipe 8 is provided with branch pipelines, the main pipeline is a backflow section 8-1 and is connected with the sludge opening tank and used for diluting raw sludge, and the branch pipelines are straight discharge sections 8-2 and are connected with an external sewage treatment system.

As shown in fig. 3-5, the inclination angle of the blanking pool 1-1 is 30-60 °, the grid 1-3 arranged at the output end of the blanking pool comprises a coarse grid, a middle grid and a fine grid which are arranged in sequence, wherein the intervals of grid bars among the coarse grid, the middle grid and the fine grid are reduced in sequence, and the sludge is filtered in multiple stages through the coarse grid, the middle grid and the fine grid in sequence; stirring devices 7 in the system respectively comprise a driving motor 7-1, a stirring shaft 7-2 and a multilayer stirrer 7-3, the multilayer stirrers are axially distributed along the stirring shaft and are respectively fixed on the stirring shaft, preferably, the number of layers of the multilayer stirrer is 3, the multilayer stirrer comprises an upper layer stirrer, a middle layer stirrer and a lower layer stirrer, the multilayer stirrer is a slurry part, the inclination angle of each slurry part relative to the horizontal plane is 30-60 degrees, the radius lengths of each layer stirrer from the stirring shaft are unequal, and a spindle-shaped structure or a trapezoidal structure with narrow two ends and wide middle can be adopted;

as shown in fig. 6, the plate-and-frame filter press 4 comprises a frame 4-1, a main beam 4-2 arranged in the horizontal direction is arranged on the frame, a plurality of filter pressing plates 4-3 are connected on the main beam in a sliding manner, filter cloth is connected between the filter pressing plates, a left baffle 4-4 and a right baffle 4-5 are respectively arranged at two ends of the main beam, a hydraulic transmission system 4-6 capable of moving to be close to and pressing the filter pressing plates to be tightly attached is arranged on the left baffle 4-4, a spray device 4-7 for cleaning the filter pressing plates and the filter cloth is arranged on the right baffle 4-5, and the spray device comprises a hose connected with tap water and a nozzle connected with the output end of the hose; the conveyer pipe is provided with flow control valve respectively with the junction of opening mud device, dispensing tank, conditioning jar, be provided with hydraulic pump subassembly in the drain pipe, for the flow of water provides power, drain pipe branch department is provided with the control valve, and control rivers get into backward flow section or the section of directly discharging.

Example one

Use figure 1 to dispose into the example, the utility model discloses in adopt 2 groups to open mud pond, 2 groups of medicinal cupping, 3 groups to take care of jar, 2 platen frame pressure filters, every duty cycle sheet frame filter-pressing time is 1.5 ~ 2h, can work twenty-four boards every day, and the moisture content 80% mud volume is handled to every board is 3.5t, and the mud day throughput of moisture content 80% is 160 tons/day promptly.

In practical application, the water content of sludge to be treated is more than 80% (original sludge), the sludge needs to be placed into a blanking pool of a sludge opening device firstly, because the output end of the blanking pool is provided with a multi-stage grid, if the inclination angle of the blanking pool is too large, the sludge falls too fast, the filtering effect of the grid is influenced, and if the inclination angle is too small, the sludge falls too slow, the filtering efficiency of the grid is influenced, so the inclination angle is set to be 30-60 degrees, the filtering speed is ensured, and the filtering quality is ensured; the sludge sequentially passes through the coarse grating, the middle grating and the fine grating, wherein impurities are filtered according to the volume, so that solid garbage such as branches and stones is effectively prevented from entering the sludge opening pool and the conditioning tank to cause damage to related equipment; mud after the multi-stage filtration falls into 2 group's mud ponds of parallelly connected setting, if pending former mud volume is great, can a plurality of mud pond groups of opening of parallelly connected access, the inlet tube begins to add water in opening the mud pond, the user inputs former mud quality, obtain through PLC controller (like the module M340 programmable controller of Schneider electrical production) operation and dilute to the required inflow of certain moisture content, control the inflow of flow control valve, cooperation agitating unit, it is more than 98% to dilute the moisture content with mud, reach the best condition of carrying out the chemical conditioning, because agitating unit includes the multilayer agitator, the agitator all is certain angle and distance the radius length inequality of (mixing) shaft, increase fluid system's instability in the rotation process, form torrent reinforced transfer and reaction process, effectively improve the stirring, the mixed effect of former mud.

The sludge after opening the mud is delivered to the conditioning tank through the delivery pipe for chemical conditioning, taking natural diatomite and polyacrylamide as chemical additives as examples, because the optimal action concentrations of the two chemical agents are different, two groups of dispensing tanks are needed to stir and mix a single chemical additive, the flow control valves in the water inlet pipe respectively control the water inflow of the two groups of dispensing tanks according to the quality and the target concentration of the added chemical agent, and the working process of the stirring device is the same as the above and is not repeated. After the treatment of the preparation tank, the natural diatomite with the concentration of 70PPM and the polyacrylamide with the concentration of 50PPM are prepared and sent to a conditioning tank through a conveying pipe for sludge chemical treatment.

The sludge and the medicament which reach respective optimal conditioning conditions in the conditioning tank are contacted, the stirring device promotes the flocculation of sludge particles and the structure enhancement, and the sludge particles are conveyed to the plate-and-frame filter press through the conveying pipe after being stirred for a period of time, thereby being beneficial to improving the dehydration effect of the mechanical filter pressing of the sludge.

After the sludge enters the plate-and-frame filter press, a user starts the hydraulic transmission system to extrude the filter pressing plate, the filter pressing water after mechanical extrusion flows into the drain pipe, after the filter pressing working period is completed, the user can spray and clean the filter pressing plate and the filter cloth through the spraying device, and no sludge is left in the filter press when the next working period begins. Because the drain pipe is provided with a branch pipeline, a PLC (such as a Modicon M340 programmable controller produced by Schneider electric) controls water flow to enter a backflow section or a straight line section through a control valve, a hydraulic pump assembly in the drain pipe provides power for the flow of filter press water, one part of the generated sludge filter press water (containing filter cloth cleaning water) flows back for diluting raw sludge, and the rest is conveyed to an integrated sewage treatment system through a pipeline for treatment; and after the filter pressing is finished, starting a conveyor belt of the filter press, opening the plate, sampling and inspecting the mud sample, ensuring that the water content of the mud sample is about 60 percent, and after the mud sample is subjected to filter pressing by 160 tons of sludge with 80 percent of moisture every day, converting the mud sample into 80 tons of sludge with 60 percent of moisture.

Example two

The present embodiment provides a filter pressing system for sludge treatment, which has a structure substantially the same as that of the first embodiment, except that the actual number of the sludge opening tank, the dosing tank, the conditioning tank and the plate-and-frame filter press is adjusted according to the production scale. This embodiment has all the technical effects of the first embodiment, and will not be described herein again.

Compared with the prior art, the utility model, through carrying out the preliminary treatment to mud and medicament before carrying out the plate and frame filter press dehydration, reach best condition of taking care of separately and carry out the chemistry again and take care of, make mud granule flocculation, structure reinforcing to improve the dehydration effect of mud mechanical filter-pressing, the drain pipe sets up branch pipeline simultaneously, realizes the backward flow reuse of partial pressure drainage, and the water economy resource is friendly to the environment greatly.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.

Claims

1. A filter pressing system for sludge treatment is characterized by comprising a sludge opening device, a dispensing tank, a conditioning tank and a plate-and-frame filter press, wherein the sludge opening device is connected with the conditioning tank through a conveying pipe;

a stirring device is arranged inside the conditioning tank;

2. The pressure filtration system for sludge treatment according to claim 1, wherein the grid comprises a coarse grid, a middle grid and a fine grid which are arranged in sequence, wherein the intervals of grid bars among the coarse grid, the middle grid and the fine grid are reduced in sequence, and the sludge is filtered in multiple stages through the coarse grid, the middle grid and the fine grid in sequence.

3. A filter press system for sludge treatment as claimed in claim 1 wherein the inclination angle of the blanking tank is 30 ° to 60 °.

4. The pressure filtration system for sludge treatment as claimed in claim 1, wherein the stirring device comprises a driving motor, a stirring shaft and a plurality of layers of stirrers, and the plurality of layers of stirrers are axially distributed along the stirring shaft and respectively fixed on the stirring shaft.

5. A filter press system for sludge treatment as claimed in claim 4 wherein the multiple agitator layers are 3 including an upper agitator, a middle agitator and a lower agitator, the multiple agitator layers are slurry-like members, and each slurry-like member is inclined at an angle of 30 ° to 60 ° with respect to the horizontal plane.

6. The pressure filtration system for sludge treatment as claimed in claim 5, wherein the upper layer stirrer, the middle layer stirrer and the lower layer stirrer have unequal radius lengths from the stirring shaft, the middle layer stirrer has a long radius and the upper and lower layer stirrers have a short radius, and are in a spindle-shaped structure with two narrow ends and a wide middle, or the upper, middle and lower layer stirrers have a trapezoidal structure with radii increasing/decreasing in sequence.

7. The filter pressing system for sludge treatment according to claim 1, wherein the plate and frame filter press comprises a frame, a main beam is arranged on the frame in the horizontal direction, a plurality of filter pressing plates are connected to the main beam in a sliding manner, filter cloth is connected between the filter pressing plates, a left baffle and a right baffle are respectively arranged at two ends of the main beam, a hydraulic transmission system capable of moving to be close to and extruding the filter pressing plates to be closely attached is arranged on the left baffle, a spraying device for cleaning the filter pressing plates and the filter cloth is arranged on the right baffle, and the spraying device comprises a hose connected with tap water and a nozzle connected to an output end of the hose.

8. The filter pressing system for sludge treatment as claimed in claim 1, wherein the joints of the delivery pipe and the sludge opening device, the dispensing tank and the conditioning tank are respectively provided with a flow control valve.

9. A filter press system for sludge treatment as claimed in claim 1 wherein the drain pipe is provided with a hydraulic pump assembly and a control valve at the branch of the drain pipe.

10. The pressure filtration system for sludge treatment according to claim 9, wherein the control valve and the hydraulic pump assembly are electrically connected to a PLC controller to realize automatic control of the system.