CN219777404U

CN219777404U - Test measuring device for simulating dehydration performance of residual sludge of plate-and-frame filter press

Info

Publication number: CN219777404U
Application number: CN202320157693.XU
Authority: CN
Inventors: 张俊; 何文战; 张勇; 孙全; 曾招财; 郭林松
Original assignee: Yangtze Ecology And Environment Co ltd
Current assignee: Yangtze Ecology And Environment Co ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-09-29
Anticipated expiration: 2033-02-08

Abstract

The utility model provides a test and measurement device for simulating the dehydration performance of surplus sludge of a plate-and-frame filter press, which comprises a first shell and a second shell which are connected with each other, wherein drainage ditches are arranged at the inner ends of the first shell and the second shell, a supporting net and filter cloth are paved in the first shell and the second shell, a filter cavity is formed by a space between two groups of filter cloth, a ring cutter is arranged in the filter cavity, the filter cloth and the supporting net are tightly pressed at the ends of the first shell and the second shell by the two ends of the ring cutter, drainage holes are formed at the ends of the first shell and the second shell, sampling holes are formed in the ends of the second shell and the supporting net and the filter cloth paved in the second shell, a sampling pipe is inserted into the sampling holes and communicated with the filter cavity, and the other end of the sampling pipe is sequentially connected with a sampling pump and a sample tank. The device can simulate the dehydration process of the surplus sludge of the plate-and-frame filter press, so that the dehydration efficiency of the surplus sludge is measured, and the problem that the dehydration performance cannot be evaluated by the existing specific resistance is solved.

Description

Test measuring device for simulating dehydration performance of residual sludge of plate-and-frame filter press

Technical Field

The utility model relates to the field of sludge dewatering efficiency measuring devices, in particular to a test measuring device for simulating the dewatering performance of surplus sludge of a plate-and-frame filter press.

Background

At present, conventional equipment for dehydrating residual sludge mainly comprises a plate-and-frame filter press, a belt filter press and a centrifugal dehydrator, and the requirement of industry on the final water content of the sludge is reduced to below 60%, so that the use of the plate-and-frame filter press is gradually increased. In the past, the dewatering performance and the early conditioning effect of the residual sludge during filtration are evaluated by adopting a filtration Specific Resistance (SRF), but the sample feeding process of the plate-and-frame filter press comprises two processes of filtration and packing, wherein the packing process influences the dewatering efficiency of the secondary plate-and-frame filter press and cannot be evaluated by using the specific resistance. Therefore, there is a lack of a test device for measuring the efficiency of dewatering excess sludge on the premise of measuring dewatering by a plate-and-frame filter press.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a test and measurement device for simulating the dehydration performance of surplus sludge of a plate-and-frame filter press so as to solve the problem that the dehydration performance cannot be evaluated by the existing specific resistance.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a test measuring device of simulation plate frame filter press surplus sludge dewatering performance, including interconnect's first casing and second casing, tip all is equipped with the escape canal in first casing and the second casing, all lay supporting network and filter cloth in first casing and the second casing, the filter chamber is constituteed in the space between two sets of filter cloths, be equipped with the cutting ring in the filter chamber, the cutting ring both ends compress tightly filter cloth and supporting network at first casing and second casing tip, first casing and second casing tip are equipped with the wash port, all be equipped with the sample introduction hole on supporting network and the filter cloth that lay in second casing tip and the second casing, the sample introduction pipe inserts in the sample introduction hole and communicates with the filter chamber, the sample introduction pipe other end is connected with sample introduction pump and sample tank in proper order.

In a preferred embodiment, the first housing and the second housing are connected by a flange.

In the preferred scheme, one side of the filter cloth, which is far away from the supporting net, is provided with a magnetic ring, the magnetic ring is arranged opposite to the sample injection hole, and the magnetic ring compresses the inner ring of the filter cloth.

In a preferred scheme, the drain hole is an L-shaped hole, the L-shaped hole is connected with the side wall of the first shell or the second shell, and a drain pipe is inserted into the drain hole.

In a preferred embodiment, the sample well is placed on an electronic balance.

In a preferred embodiment, the drainage ditch comprises concentrically arranged annular grooves, and the annular grooves are communicated through a plurality of radial grooves.

In a preferred scheme, the sample injection pump is a pneumatic diaphragm pump or a screw pump.

The test measuring device for simulating the dehydration performance of the residual sludge of the plate-and-frame filter press can simulate the dehydration process of the residual sludge of the plate-and-frame filter press, and obtains the sample injection efficiency of different residual sludge or the residual sludge obtained under different conditioning means through the calculation of the dehydration efficiency, so that the treatment capacity of the residual sludge with high dehydration efficiency in the actual plate-and-frame filter press is large, and the treatment efficiency is high.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples of implementation:

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a right side view of the first housing;

FIG. 3 is a left side view of the second housing;

FIG. 4 is a cross-sectional view of the present utility model;

FIG. 5 is a diagram of a drain profile;

in the figure: the device comprises a first shell 1, a second shell 2, a drainage ditch 3, a supporting net 4, a filter cloth 5, a cutting ring 6, a drainage hole 7, a sample injection hole 8, a sample injection pipe 9, a sample injection pump 10, a sample tank 11, a magnetic ring 12, a drainage pipe 13, an electronic balance 14, an annular groove 301 and a radial groove 302.

Detailed Description

As shown in figures 1-3, the experimental measurement device for simulating the dehydration performance of the surplus sludge of the plate-and-frame filter press comprises a first shell 1 and a second shell 2 which are connected with each other, wherein the first shell 1 and the second shell 2 can be connected through threads or flanges, a cylindrical cavity is formed after the first shell 1 and the second shell 2 are spliced, the inner diameter of the end part of the cylindrical cavity is 18cm, and the depth is 3cm. The inner ends of the first shell 1 and the second shell 2 are respectively provided with a drainage ditch 3, the first shell 1 and the second shell 2 are respectively internally provided with a support net 4 and a filter cloth 5, the support net 4 is a metal net, the filter cloth 5 is made of terylene, the filter cloth 5 is permeable and impermeable to mud, the support net 4 supports the filter cloth 5, a space between two groups of filter cloths 5 forms a filter cavity, a cutting ring 6 is arranged in the filter cavity, the two ends of the cutting ring 6 compress the filter cloth 5 and the support net 4 at the end parts of the first shell 1 and the second shell 2, the end parts of the first shell 1 and the second shell 2 are respectively provided with a drainage hole 7, the end parts of the second shell 2 and the support net 4 and the filter cloth 5 paved in the second shell 2 are respectively provided with a sample injection hole 8, a sample injection pipe 9 is inserted into the sample injection hole 8 to be communicated with the filter cavity, and the other end of the sample injection pipe 9 is sequentially connected with a sample injection pump 10 and a sample tank 11. The sample injection pump 10 is a pneumatic diaphragm pump or a screw pump, and the pumping pressure is 0.4-0.8 Mpa.

Preferably, as shown in fig. 3, a magnetic ring 12 is arranged on one side of the filter cloth 5 away from the support net 4, the magnetic ring 12 is arranged opposite to the sample injection hole 8, and the magnetic ring 12 compresses the inner ring of the filter cloth 5.

As shown in fig. 4, the drain hole 7 is an "L" shaped hole, the "L" shaped hole is connected to the side wall of the first housing 1 or the second housing 2, and the drain pipe 13 is inserted into the drain hole 7.

The sample well 11 is placed on an electronic balance 14. The quality of the sample is conveniently monitored in real time.

As shown in fig. 5, the drain 3 includes concentrically arranged annular grooves 301, the annular grooves 301 being communicated by a plurality of radial grooves 302.

By arranging the drainage ditch 3, the uniform support of the support net 4 can be realized, and the drainage of water during dehydration is facilitated.

When the sample injection pump 10 is particularly used, the sample injection pump 10 sucks the residual sludge sample from the sample tank 11, pumps the residual sludge sample into the filter cavity through the sample injection pipe 9, and simultaneously monitors the quality of the residual sludge in the sample tank in real time. The other end of the sample injection pump 10 is used for measuring the mass of water discharged from the water discharge hole 7 in real time, and when the water discharge rate is about 0, the sample injection pump stops working. The filtration amount (η) of the dry matter per unit area of the surplus sludge is calculated by the following formula, and a "filtration amount per unit area of dry matter-time" curve, that is, the dehydration efficiency of the surplus sludge in the plate and frame filter press is obtained.

η＝(m ₀ -m _i )×(1-ω ₀ )

Wherein: eta-dry matter filtration amount of excess sludge per unit area in plate-and-frame filter press, g/cm ² ；

m ₀ -0 mass, g of excess sludge in the sample introduction tank;

m _i the mass of the residual sludge in the sample injection groove at the moment of i and g;

ω ₀ -initial moisture content of excess sludge.

The device is particularly suitable for measuring and evaluating the dewatering efficiency of the surplus sludge or the conditioned surplus sludge in the plate frame machine. The device and the method can realize the assessment of good conditioning effect of the residual sludge discharged by the municipal sewage plant, are simple and convenient to operate, have higher consistency with the dehydration performance when the residual sludge is dehydrated by using the plate-and-frame filter press practically, and make up for the defect that the dehydration performance of the residual sludge in the plate-and-frame filter press is difficult to evaluate by specific resistance.

Claims

1. A test measuring device for simulating the dehydration performance of surplus sludge of a plate-and-frame filter press is characterized in that: including interconnect's first casing (1) and second casing (2), tip all is equipped with escape canal (3) in first casing (1) and second casing (2), support net (4) and filter cloth (5) are all laid in first casing (1) and second casing (2), the filter chamber is constituteed in space between two sets of filter cloth (5), be equipped with cutting ring (6) in the filter chamber, cutting ring (6) both ends compress tightly filter cloth (5) and support net (4) at first casing (1) and second casing (2) tip, first casing (1) and second casing (2) tip are equipped with wash port (7), all be equipped with sample introduction hole (8) on support net (4) and filter cloth (5) laid in second casing (2), sample introduction pipe (9) insert in sample introduction hole (8) and filter chamber intercommunication, sample introduction pipe (9) other end is connected with pump (10) and sample groove (11) in proper order.

2. The experimental measurement device for simulating residual sludge dewatering performance of a plate and frame filter press according to claim 1, wherein the experimental measurement device comprises: the first shell (1) and the second shell (2) are connected through flanges.

3. The experimental measurement device for simulating residual sludge dewatering performance of a plate and frame filter press according to claim 1, wherein the experimental measurement device comprises: one side of the filter cloth (5) deviating from the support net (4) is provided with a magnetic ring (12), the magnetic ring (12) is arranged opposite to the sample injection hole (8), and the magnetic ring (12) compresses the inner ring of the filter cloth (5).

4. The experimental measurement device for simulating residual sludge dewatering performance of a plate and frame filter press according to claim 1, wherein the experimental measurement device comprises: the drain hole (7) is an L-shaped hole, the L-shaped hole is connected with the side wall of the first shell (1) or the second shell (2), and the drain pipe (13) is inserted into the drain hole (7).

5. The experimental measurement device for simulating residual sludge dewatering performance of a plate and frame filter press according to claim 1, wherein the experimental measurement device comprises: the sample tank (11) is placed on an electronic balance (14).

6. The experimental measurement device for simulating residual sludge dewatering performance of a plate and frame filter press according to claim 1, wherein the experimental measurement device comprises: the drainage ditch (3) comprises annular grooves (301) which are concentrically arranged, and the annular grooves (301) are communicated through a plurality of radial grooves (302).

7. The experimental measurement device for simulating residual sludge dewatering performance of a plate and frame filter press according to claim 1, wherein the experimental measurement device comprises: the sample injection pump (10) is a pneumatic diaphragm pump or a screw pump.