CN-224212571-U - PAM preparation facilities for sludge dewatering system

CN224212571UCN 224212571 UCN224212571 UCN 224212571UCN-224212571-U

Abstract

The PAM preparation device for the sludge dewatering system comprises a cylindrical primary preparation tank, a secondary preparation tank, a curing tank, a liquid storage tank and dosing equipment which are sequentially communicated, wherein the primary preparation tank is overlapped at the top of the liquid storage tank, the secondary preparation tank is overlapped at the top of the curing tank, the primary preparation tank and the secondary preparation tank are attached side by side, the curing tank and the liquid storage tank are close side by side and leave a space, the distance between the axis of the primary preparation tank and the axis of the liquid storage tank is larger than the radius of the primary preparation tank and smaller than the radius of the liquid storage tank, the distance between the axis of the secondary preparation tank and the axis of the curing tank is larger than the radius of the secondary preparation tank and smaller than the radius of the curing tank, through the overlapped and serial design of the multistage tank bodies, the occupied area can be reduced, the hydrolysis curing time can be ensured, the stirring machine can be conveniently arranged to stir each tank body, the mixed hydrolysis can be realized, and the mixing uniformity and the preparation quality of PAM can be improved by gradually reducing the upper and lower limits of the rotating speeds of the stirring machines along the flow direction.

Inventors

CHEN JIAYOU
Jin Hanhua
XIONG LIPING
GU XIANGMING
XU XINGZHONG
XU WEIZHONG
SU JUN
HUANG RUI
WANG XUEXIN
TAO YAJIE
HAN XIAOWEI

Assignees

吴江华衍水务有限公司

Dates

Publication Date: 20260508
Application Date: 20250513

Claims (10)

1. PAM preparation facilities for sludge dewatering system, including being cylindric and the one-level preparation groove, second grade preparation groove, curing groove, reservoir that communicate in proper order to and dosing apparatus, the radius of one-level preparation groove and second grade preparation groove equals, and the radius of curing groove and reservoir equals its characterized in that: The primary preparation tank is overlapped at the top of the liquid storage tank, the secondary preparation tank is overlapped at the top of the curing tank, the primary preparation tank and the secondary preparation tank are attached side by side, the curing tank and the liquid storage tank are close side by side and are spaced, a first virtual plane formed by the axial leads of the primary preparation tank and the secondary preparation tank is parallel to a second virtual plane formed by the axial leads of the curing tank and the liquid storage tank, the distance between the axial leads of the primary preparation tank and the axial leads of the liquid storage tank is larger than the radius of the primary preparation tank and smaller than the radius of the liquid storage tank, the distance between the axial leads of the secondary preparation tank and the axial leads of the curing tank is larger than the radius of the secondary preparation tank and smaller than the radius of the curing tank, and the stirrer is arranged in the primary preparation tank, the secondary preparation tank, the curing tank and the liquid storage tank, and the rotating speed upper limit and the rotating speed lower limit of the stirrer are gradually reduced along the PAM flow direction.
2. The PAM production apparatus for a sludge dewatering system according to claim 1, wherein volumes of the primary production tank, the secondary production tank, the aging tank and the liquid storage tank are 2.5m 3 、2.5m 3 、5m 3 、5m 3 , respectively, and rotational speeds of the agitators on the primary production tank, the secondary production tank, the aging tank and the liquid storage tank are 200-400rpm, 100-300rpm, 50-150rpm and 20-100rpm, respectively.
3. The PAM preparation device for a sludge dewatering system according to claim 1, wherein a plurality of rotation-resisting plates are fixedly arranged on the inner walls of the primary preparation tank, the secondary preparation tank, the curing tank and the liquid storage tank, liquid level pipes are communicated with one sides of the primary preparation tank, the secondary preparation tank, the curing tank and the liquid storage tank, and an ultrasonic liquid level meter is arranged at the top of each liquid level pipe.
4. The PAM preparation device for a sludge dewatering system according to claim 1, wherein the first-stage preparation tank, the second-stage preparation tank, the curing tank and the notch of the liquid storage tank are respectively provided with an annular overflow tank, a connecting pipe is installed at the bottom of the annular overflow tank, the connecting pipe is communicated with the tank where the annular overflow tank is located, and a control valve is arranged on the connecting pipe.
5. The PAM preparation device for a sludge dewatering system according to claim 1, wherein the medicine adding equipment comprises an auger, a storage tank and a weighing assembly, the auger is arranged below the storage tank, one end of the auger is in sealing connection with the bottom opening of the storage tank, the other end of the auger is provided with a discharging pipe extending downwards, the storage tank is supported on a frame type support, a vibrator is arranged at one end, close to the auger, of the storage tank, and the weighing assembly is used for receiving PAM powder sent out by the discharging pipe and weighing the PAM powder.
6. The PAM preparation device for a sludge dewatering system according to claim 5, wherein the screw feeder is obliquely arranged, one end of the screw feeder connected with the storage tank is a low end, the middle part of the screw feeder is supported on the frame support, the screw blades inside the screw feeder are variable-pitch screw blades, and the screw pitches of the screw blades gradually decrease from low to high.
7. The PAM preparation device for a sludge dewatering system according to claim 5, wherein the weighing assembly comprises a receiving pipe, an annular plate and weighing sensors, the receiving pipe is coaxially arranged below the discharging pipe, a drawable blocking plate is arranged at the lower end part of the receiving pipe, the annular plate is sleeved on the outer wall of the receiving pipe, the weighing sensors are connected to the bottom wall of the annular plate, a plurality of weighing sensors are distributed in an annular array along the center of the annular plate, and the weighing sensors are supported on the frame type support.
8. The PAM preparation device for a sludge dewatering system according to claim 7, wherein the discharging pipe is of a conical structure which is downwards and outwards opened, the receiving pipe is of a conical structure which is upwards and outwards opened, and the large mouth ends of the two conical structures are in virtual connection.
9. The PAM preparation device for a sludge dewatering system according to claim 7, wherein one side of the blocking plate is connected with a driving plate for pulling the blocking plate, an air cylinder for driving the driving plate to move is arranged above the driving plate, so that the blocking plate is pulled, and a cylinder body of the air cylinder is fixed on the receiving pipe.
10. The PAM preparation device for a sludge dewatering system according to claim 5, wherein an immersion bucket is arranged below the weighing assembly, the immersion bucket is of a conical structure, a water inlet pipe is arranged at the upper end of the immersion bucket along the tangential direction of the inner wall, a venturi tube is vertically connected to the bottom of the immersion bucket, and the end of the venturi tube is communicated with the primary preparation groove.

Description

PAM preparation facilities for sludge dewatering system Technical Field The utility model relates to the technical field of sludge dewatering, in particular to a PAM preparation device for a sludge dewatering system. Background PAM (polyacrylamide) is a water-soluble linear high polymer formed by polymerizing acrylamide monomers through free radical initiation, has good flocculation property and water solubility, and is an important formula medicament of a sludge dewatering system. Most of the existing PAM preparation devices adopt a plurality of tanks arranged side by side for hydrolysis, such as the preparation devices disclosed in Chinese patent CN222550673U, CN214131459U, CN218077606U, because each tank is arranged side by side, the occupied area is large, in order to solve the problem, a certain water plant adopts tanks stacked up and down for hydrolysis, so as to realize the preparation of PAM, but the tank at the bottom of the preparation device has no space for installing stirring facilities, so that the mixed hydrolysis function cannot be realized, meanwhile, the total volume of each tank of the preparation device is 5.2m 3, and when 5 centrifuges are in full load operation in winter, the total dosage is up to 6.7m 3/h (see figure 1), so that the hydrolysis curing time of the PAM is insufficient, the medicine consumption is multiplied (see figures 2 and 3), and the PAM which is not hydrolyzed can remain in the separating liquid, thereby affecting the normal operation of the whole sludge dewatering system. Accordingly, there is a need to provide a PAM manufacturing apparatus for a sludge dewatering system that solves the above-mentioned problems. Disclosure of utility model The utility model aims to overcome one or more defects in the prior art and provides a PAM preparation device for a sludge dewatering system. In order to achieve the above purpose, the technical scheme adopted by the utility model is that the PAM preparation device for the sludge dewatering system comprises a cylindrical primary preparation tank, a secondary preparation tank, a curing tank, a liquid storage tank and a dosing device which are sequentially communicated, wherein the radiuses of the primary preparation tank and the secondary preparation tank are equal, the radiuses of the curing tank and the liquid storage tank are equal, the primary preparation tank is overlapped at the top of the liquid storage tank, the secondary preparation tank is overlapped at the top of the curing tank, the primary preparation tank and the secondary preparation tank are attached side by side, the curing tank and the liquid storage tank are close side by side and leave a space, a first virtual plane formed by the axial leads of the primary preparation tank and the secondary preparation tank is parallel to a second virtual plane formed by the axial leads of the curing tank and the liquid storage tank, the distance between the axial leads of the primary preparation tank and the axial leads of the liquid storage tank is larger than the radius of the primary preparation tank and smaller than the radius of the liquid storage tank, the distance between the axial leads of the secondary preparation tank and the axial leads of the secondary preparation tank are larger than the radius of the secondary preparation tank and smaller than the radius of the curing tank, the primary preparation tank, the secondary preparation tank, the curing tank and the liquid storage tank are all provided with stirring machines, and the stirring machines are arranged, and the upper and lower rotation speeds of the stirring machines gradually flow along the PAM. Preferably, the volumes of the primary preparation tank, the secondary preparation tank, the curing tank and the liquid storage tank are respectively 2.5m 3、2.5m3、5m3、5m3, and the rotating speeds of the stirrer on the primary preparation tank, the secondary preparation tank, the curing tank and the liquid storage tank are respectively 200-400rpm, 100-300rpm, 50-150rpm and 20-100rpm. Preferably, the inner walls of the primary preparation tank, the secondary preparation tank, the curing tank and the liquid storage tank are fixedly provided with a plurality of rotation-resisting plates, one side of the primary preparation tank, the secondary preparation tank, the curing tank and one side of the liquid storage tank are communicated with a liquid level pipe, and the top of the liquid level pipe is provided with an ultrasonic liquid level meter. Preferably, the notch parts of the primary preparation tank, the secondary preparation tank, the curing tank and the liquid storage tank are all provided with annular overflow tanks, a connecting pipe is installed at the bottom of each annular overflow tank, the connecting pipe is communicated with the tank where the annular overflow tank is located, and a control valve is arranged on the connecting pipe. Preferably, the medicine adding equipment comprises an auger, a storage tank