CN210825900U - A filter-pressing system for sludge treatment - Google Patents

Abstract

The utility model discloses a filter press system for sludge treatment, which is characterized in that it comprises a sludge opening device, a medicine dispensing tank, a conditioning tank and a plate and frame filter press, wherein the sludge opening device communicates with the sludge opening device through a conveying pipe. A conditioning tank is connected, the dispensing tank is connected with the conditioning tank through a conveying pipe, and the conditioning tank is connected with the plate and frame filter press through a conveying pipe. The utility model has the advantages of strong running stability, environmental protection and energy saving, effectively improving the dewatering effect of the mechanical pressure filtration of sludge, and increasing the productivity.

Description

A filter press system for sludge treatment

technical field

The utility model relates to the technical field of sludge treatment, in particular to a filter press system for sludge treatment.

Background technique

With the development of the papermaking industry and the construction of pollution prevention and control facilities, the sludge produced by the treatment of papermaking wastewater has become a new source of pollution, and this source of pollution has been increasing with the expansion of the production scale of the papermaking industry. There are two main sources of sludge in waste paper and papermaking enterprises: one is the sludge produced in the process of screening and purification of waste paper and papermaking. The sludge is mainly non-fibrous impurities with complex components, mainly including organic and inorganic substances; It is a biological sludge produced in the process of papermaking wastewater treatment. The main components are fine fibers, lignin, nitrogen, phosphorus, potassium and other substances. At present, there are two main treatment methods. The first is direct landfill, which not only requires landfill, but also pollutes the environment; the second is to dehydrate the sludge, mix it with coal, and then send it to the boiler for combustion. In the prior art, a filter press is often used to directly dehydrate the sludge. Among them, the plate and frame filter press is a common equipment in chemical industry. . Therefore, it is necessary to increase the construction of sludge treatment facilities, select scientific and reasonable sludge dewatering methods and treatment processes, and improve treatment efficiency.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a filter press system for sludge treatment which has strong running stability, environmental protection and energy saving, effectively improves the dewatering effect of sludge mechanical filter press, and improves productivity in order to solve the deficiencies of the prior art.

The utility model adopts the following technical solutions to achieve the above purpose:

A filter press system for sludge treatment, characterized in that it includes a sludge opening device, a dispensing tank, a conditioning tank and a plate and frame filter press, wherein the sludge opening device is connected to the conditioning tank through a conveying pipe, so that the The dispensing tank is connected with the conditioning tank through a conveying pipe, and the conditioning tank is connected with the plate and frame filter press through a conveying pipe;

The mud opening device includes a sloping feeding tank, and several mud opening ponds connected to the output end of the feeding pond and in a parallel relationship with each other, wherein the output end of the feeding pond is provided with a grille, and the opening A water inlet pipe is arranged on the upper part of the mud pool, and a stirring device is arranged inside;

The medicine dispensing tank includes a medicine dispensing tank main body, the upper part of the medicine dispensing tank main body is provided with a water inlet pipe, and the interior is provided with a stirring device along the vertical direction;

A stirring device is arranged inside the conditioning tank;

The output end of the plate and frame filter press is connected with a drain pipe, and the drain pipe is provided with a branch pipeline. External sewage treatment system connection.

As a further description of the above solution, the grid includes a coarse grid, a medium grid, and a fine grid arranged in sequence, wherein the grid interval between the coarse grid, the middle grid, and the thin grid decreases in sequence. , the sludge passes through the coarse grid, the medium grid and the fine grid in turn to achieve multi-stage filtration.

Further, the inclination angle of the feeding tank is 30°-60°.

Further, the stirring device includes a driving motor, a stirring shaft and a multi-layer stirrer, and the multi-layer stirrers are axially distributed along the stirring shaft and are respectively fixed on the stirring shaft.

Further, it is preferred that the number of layers of the multi-layer agitator is 3 layers, including an upper-layer agitator, a middle-layer agitator and a lower-layer agitator.

Further, the multi-layer agitator is a slurry-like piece, and the inclination angle of each slurry-like piece with respect to the horizontal plane is 30°-60°.

Further, the radius lengths of the upper-layer agitator, the middle-layer agitator and the lower-layer agitator are unequal from the stirring shaft, the middle-layer agitator has a long radius, and the upper and lower layer agitators have a short radius, which is a spindle-shaped structure with narrow ends and wide middle, Or the radius of the upper, middle and lower agitators increases/decreases in turn, forming a trapezoidal structure.

Further, the plate-and-frame filter press includes a frame on which a main beam arranged in a horizontal direction is arranged, a number of filter press plates are slidably connected on the main beam, filter cloths are connected between the filter press plates, and the main beam is The two ends of the filter are respectively provided with a left baffle and a right baffle, the left baffle is provided with a hydraulic transmission system that can move close to and squeeze the filter press plates to be close together, and the right baffle is provided with a hydraulic transmission system. A spray device for cleaning filter press plates and filter cloths. The spray device includes a hose connected to tap water and a nozzle connected to the output end of the hose.

Further, a flow control valve is respectively provided at the connection between the conveying pipe and the mud opening device, the dispensing tank and the conditioning tank.

Further, a hydraulic pump assembly is arranged in the drainage pipe to provide power for the flow of water, and a control valve is arranged at the branch of the drainage pipe to control the water flow into the return section or the straight discharge section.

Further, the flow control valve, the control valve and the hydraulic pump components are all electrically connected with the PLC controller to realize the automatic control of the system.

The beneficial effects that the utility model can achieve by adopting the above-mentioned technical solutions are:

1. The utility model can slow down the speed of sludge falling to the sludge opening tank by slanting the lowering tank of the sludge opening device, preventing the sludge from accumulating in the sludge opening tank and affecting the stirring effect. The grid can effectively screen the solid waste such as branches and stones mixed in the sludge according to the volume of the impurities, and play a multi-stage filtration function to prevent large impurities from clogging the grid, and at the same time, it is convenient for the staff to classify and clean the impurities; stirring The device cooperates with the flow control valve in the water inlet pipe to control the water inlet amount according to the quality of the sludge treated each time, and the multi-layer agitator fully stirs and dilutes the sludge, which is beneficial to improve the effect of subsequent chemical conditioning of the sludge.

2. The utility model can control the water intake according to the quality of the medicine each time by setting the medicine dispensing tank, cooperate with the flow control valve set in the water inlet pipe, and cooperate with the stirring device to mix and stir the medicine, so as to ensure that the medicine reaches the optimal concentration of chemical conditioning. It can quantitatively and qualitatively dispense medicines under certain conditions, which can not only prevent dosage errors in manual feeding, effectively improve the accuracy of drug delivery, but also avoid agglomeration or uneven distribution of drugs.

3. The conditioning tank receives the muddy water from the mud opening device and the medicine in the dispensing tank. The internal stirring device fully stirs the muddy water and the medicine in the tank, so that the sludge particles are flocculated and the structure is strengthened, which effectively improves the performance of the plate and frame filter press. Dehydration effect.

4. The sludge press filtration water (including filter cloth cleaning water) produced by the plate and frame filter press passes through the branch pipeline of the drain pipe, and part of it is returned to the mud opening tank through the return section for dilution of raw mud, and the remaining part of the sewage passes through The straight discharge section is transported to the external sewage treatment system for treatment, which not only saves water resources and achieves the purpose of reuse of wastewater, but also scientifically and effectively treats sewage, which is environmentally friendly.

Description of drawings

Fig. 1 is the principle schematic diagram of the utility model.

Figure 2 is a schematic diagram of the principle of the mud opening device.

Figure 3 is a top view of the mud breaking device.

Figure 4 is a schematic diagram of the structure of the dispensing tank.

Figure 5 is a schematic structural diagram of a conditioning tank.

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

Explanation of reference numerals: 1, mud opening device, 1-1, feeding tank, 1-2, mud opening tank, 1-3, grille, 2, dispensing tank, 3, conditioning tank, 4, plate and frame filter press Machine, 4-1, frame, 4-2, main beam, 4-3, filter plate, 4-4, left baffle, 4-5, right baffle, 4-6, hydraulic transmission system, 4- 7. Spraying device, 5. Conveying pipe, 6. Water inlet pipe, 7. Stirring device, 7-1, Drive motor, 7-2, Stirring shaft, 7-3, Multilayer agitator, 8. Drain pipe, 8 -1, return section, 8-2, straight row section.

Detailed ways

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

As shown in Figures 1 to 2, the present utility model is a filter press system for sludge treatment, which is characterized in that it comprises a sludge opening device 1, a dispensing tank 2, a conditioning tank 3 and a plate and frame filter press 4, The mud breaking device 1 is connected to the conditioning tank 3 through a conveying pipe 5 , the dispensing tank 2 is connected to the conditioning tank 3 through a conveying pipe 5 , and the conditioning tank 3 is connected to the plate frame through the conveying pipe 5 The filter press 4 is connected; the mud opening device 1 includes an inclined feeding tank 1-1, and a plurality of mud opening tanks 1-2 connected to the output end of the feeding pond and in a parallel relationship with each other, wherein the The output end of the feeding tank is provided with grilles 1-3, the upper part of the mud opening tank is provided with a water inlet pipe 6, and a stirring device 7 is provided inside; the dispensing tank 2 includes a dispensing tank body, and the upper part of the dispensing tank body is provided with The water inlet pipe 6 is provided with a stirring device 7 in the vertical direction; the conditioning tank 3 is provided with a stirring device 7; the output end of the plate and frame filter press 4 is connected with a drain pipe 8, and the drain pipe 8 is provided with Branch pipeline, the main pipeline is the return section 8-1 which is connected to the mud opening tank for dilution of raw mud, and the branch pipeline is the straight discharge section 8-2 which is connected to the external sewage treatment system.

As shown in Figures 3-5, the inclination angle of the feeding pool 1-1 is 30°-60°, and the grids 1-3 set at the output end of the feeding pool include coarse grids and middle grids arranged in sequence. , fine grid, wherein the grid interval between the coarse grid, the medium grid and the fine grid is reduced in turn, and the sludge is sequentially filtered through the coarse grid, the medium grid and the fine grid to achieve multi-stage filtration; the system The stirring devices 7 in each include a drive motor 7-1, a stirring shaft 7-2 and a multi-layer stirrer 7-3, which are distributed axially along the stirring shaft and are respectively fixed on the stirring shaft , preferably the number of layers of the multi-layer agitator is 3 layers, including the upper layer agitator, the middle layer agitator and the lower layer agitator, the multi-layer agitator is a slurry part, and the inclination angle of each slurry part relative to the horizontal plane is 30°-60°, the radius of each layer of stirrer from the stirring shaft is not equal, and a spindle-shaped structure or a trapezoidal structure with narrow width at both ends and wide in the middle can be used;

As shown in FIG. 6 , the plate and frame filter press 4 includes a frame 4-1, the frame is provided with a main beam 4-2 arranged in a horizontal direction, and a number of filter press plates 4-3 are slidably connected to the main beam. , a filter cloth is connected between the filter press plates, and the two ends of the main beam are respectively provided with a left baffle 4-4 and a right baffle 4-5. The hydraulic transmission system 4-6 in which the filter press plates are closely attached together, the right baffle plate 4-5 is provided with a spray device 4-7 for cleaning the filter press plate and the filter cloth. A hose for entering tap water and a nozzle connected to the output end of the hose; a flow control valve is respectively provided at the connection between the conveying pipe and the mud opening device, the dispensing tank and the conditioning tank, and a hydraulic pump assembly is provided in the drain pipe for The flow of water provides power, and a control valve is arranged at the branch of the drain pipe to control the water flow into the return section or the straight discharge section.

Example 1

Taking the configuration of FIG. 1 as an example, the utility model adopts 2 groups of mud-opening tanks, 2 groups of dispensing tanks, 3 groups of conditioning tanks, and 2 plate and frame filter presses, and the plate and frame filter press time of each working cycle is 1.5～2h, Twenty-four boards can be worked every day, and each board can handle 3.5t of sludge with a moisture content of 80%, that is, the daily processing capacity of sludge with a moisture content of 80% is 160 tons/day.

In practical application, the moisture content of the sludge to be treated is more than 80% (raw mud), and it needs to be placed in the unloading tank of the sludge opening device. If the angle is too large, the sludge will fall too fast, which will affect the filtering effect of the grid. If the angle is too small, the sludge will fall too slowly, which will affect the filtering efficiency of the grid. Therefore, the inclination angle is set to 30°-60°, which not only ensures the filtration rate but also ensures the filtration efficiency. Quality; the sludge passes through the coarse grid, the medium grid and the fine grid in sequence, and the impurities are filtered according to the size, which effectively prevents the solid waste such as branches and stones from entering the mud opening pool and conditioning tank and causing damage to related equipment; multi-level The filtered sludge falls into the two sets of mud-opening tanks set up in parallel. If the amount of raw mud to be treated is large, multiple mud-opening tank groups can be connected in parallel, and the water inlet pipe starts to add water to the mud-opening tanks. The quality of the raw mud is calculated by the PLC controller (such as the Modicon M340 programmable controller produced by Schneider Electric) to obtain the water intake required for dilution to a certain moisture content, control the water intake of the flow control valve, and cooperate with the stirring device to dilute the sludge. When the water content is above 98%, the best conditions for chemical conditioning are reached. Since the stirring device includes a multi-layer stirrer, the stirrer is at a certain angle and the radius from the stirring shaft is not equal in length. During the rotation process, the fluid increases The instability of the system forms a turbulent flow to strengthen the transfer and reaction process, effectively improving the stirring and mixing effect of the raw mud.

The sludge after opening the mud is sent to the conditioning tank through the conveying pipe for chemical conditioning. Taking natural diatomite and polyacrylamide as chemical additives as an example, because the optimal concentration of these two chemicals is different, two groups of chemical agents are required. The dispensing tank stirs and mixes a single chemical additive, and the flow control valve in the water inlet pipe controls the water intake of the two groups of dispensing tanks respectively according to the quality and target concentration of the added chemical agent. The working process of the stirring device is the same as the above. After being treated in the dispensing tank, it is configured into natural diatomite with a concentration of 70PPM and polyacrylamide with a concentration of 50PPM, and sent to the conditioning tank through a conveying pipe for chemical sludge treatment.

In the conditioning tank, the sludge and the chemicals that have reached their respective optimal conditioning conditions are in contact, and the stirring device promotes the flocculation of the sludge particles and the enhancement of the structure. Dehydration effect of filtration.

After the sludge enters the plate and frame filter press, the user starts the hydraulic transmission system to squeeze the filter plate, and the pressure filter water after mechanical extrusion flows into the drainage pipe. After the filter press work cycle is completed, the user can pass the spray device. Spray and clean the filter press plate and filter cloth to ensure that there is no sludge residue in the filter press at the beginning of the next working cycle. Since the drain pipe is set with branch pipes, the PLC controller (such as the Modicon M340 programmable controller produced by Schneider Electric) controls the water flow into the return section or the straight discharge section through the control valve. The flow provides power, and a part of the produced sludge press filtration water (including filter cloth cleaning water) is returned for the dilution of the raw mud, and the rest is transported to the integrated sewage treatment system through the pipeline for treatment; after the filtration is completed, the filter press is started to transport Take, open the board, and randomly check the mud sample to ensure that the moisture content of the mud sample is about 60%, and 160 tons of 80% water sludge per day will be converted into 80 tons of 60% water sludge after pressure filtration.

Embodiment 2

The structure of a filter press system for sludge treatment provided in this embodiment is basically the same as that of the first embodiment, the difference is that the actual number of the mud opening tank, the dispensing tank, the conditioning tank and the plate and frame filter press is based on The scale of production is adjusted. This embodiment has all the technical effects of the first embodiment, which will not be repeated here.

Compared with the prior art, the utility model pre-processes the sludge and the chemicals before the dehydration of the plate and frame filter press to achieve the respective optimal conditioning conditions and then carries out chemical conditioning, so as to flocculate the sludge particles and strengthen the structure, so as to improve the performance of the sludge particles. The dewatering effect of the sludge mechanical filter press is improved. At the same time, the drainage pipe is equipped with a branch pipeline to realize the return and reuse of part of the filter press water, which greatly saves water resources and is environmentally friendly.

The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the present utility model, several modifications and improvements can be made. It belongs to the protection scope of the present invention.

Claims (10)

1. A filter press system for sludge treatment, characterized in that it comprises a mud opening device, a dispensing tank, a conditioning tank and a plate and frame filter press, wherein the mud opening device is connected with the conditioning tank by a conveying pipe , the dispensing tank is connected with the conditioning tank through a conveying pipe, and the conditioning tank is connected with the plate and frame filter press through a conveying pipe; The mud opening device includes a sloping feeding tank, and several mud opening ponds connected to the output end of the feeding pond and in a parallel relationship with each other, wherein the output end of the feeding pond is provided with a grille, and the opening A water inlet pipe is arranged on the upper part of the mud pool, and a stirring device is arranged inside; The medicine dispensing tank includes a medicine dispensing tank main body, the upper part of the medicine dispensing tank main body is provided with a water inlet pipe, and the interior is provided with a stirring device along the vertical direction; A stirring device is arranged inside the conditioning tank; The output end of the plate and frame filter press is connected with a drain pipe, and the drain pipe is provided with a branch pipeline. External sewage treatment system connection. 2 . A filter press system for sludge treatment according to claim 1 , wherein the grid comprises a coarse grid, a medium grid and a fine grid arranged in sequence, wherein the coarse grid The grid interval between the grid, the middle grid and the fine grid decreases in turn, and the sludge passes through the coarse grid, the middle grid and the fine grid in turn to achieve multi-stage filtration. 3 . The filter press system for sludge treatment according to claim 1 , wherein the inclination angle of the feeding tank is 30°-60°. 4 . 4. A filter press system for sludge treatment according to claim 1, wherein the stirring device comprises a driving motor, a stirring shaft and a multi-layer agitator, and the multi-layer agitator is along the The stirring shafts are distributed axially and are respectively fixed on the stirring shafts. 5 . A filter press system for sludge treatment according to claim 4 , wherein the number of layers of the multi-layer agitator is 3, including an upper-layer agitator, a middle-layer agitator and a lower-layer agitator. 6 . , the multi-layer agitator is a slurry piece, and the inclination angle of each slurry piece relative to the horizontal plane is 30°-60°. 6 . A filter press system for sludge treatment according to claim 5 , wherein the upper agitator, the middle layer agitator and the lower layer agitator are unequal in length from the radius of the stirring shaft, and the middle layer The agitator has a long radius and a short radius of the upper and lower agitators, which is a spindle-shaped structure with narrow ends at both ends and a width in the middle, or the upper, middle and lower agitator radii increase/decrease in turn, forming a trapezoidal structure. 7. A filter press system for sludge treatment according to claim 1, wherein the plate and frame filter press comprises a frame, and the frame is provided with a main beam arranged in a horizontal direction, and the main beam A number of filter press plates are slidably connected to the upper part, and filter cloths are connected between the filter press plates. The two ends of the main beam are respectively provided with a left baffle plate and a right baffle plate. The hydraulic transmission system in which the filter press plates are closely attached together, and a spray device for cleaning the filter press plate and filter cloth is arranged on the right baffle. Nozzle on the output end of the tube. 8 . The filter press system for sludge treatment according to claim 1 , wherein a flow control valve is respectively provided at the connection between the conveying pipe and the sludge opening device, the dispensing tank and the conditioning tank. 9 . 9 . The filter press system for sludge treatment according to claim 1 , wherein a hydraulic pump assembly is arranged in the drainage pipe, and a control valve is arranged at a branch of the drainage pipe. 10 . 10 . The filter press system for sludge treatment according to claim 9 , wherein the control valve and the hydraulic pump assembly are all electrically connected to the PLC controller to realize automatic control of the system. 11 .

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