CN115557662A - Mud cake pressing machine for sewage treatment - Google Patents
Mud cake pressing machine for sewage treatment Download PDFInfo
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- CN115557662A CN115557662A CN202211408881.1A CN202211408881A CN115557662A CN 115557662 A CN115557662 A CN 115557662A CN 202211408881 A CN202211408881 A CN 202211408881A CN 115557662 A CN115557662 A CN 115557662A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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Abstract
The invention belongs to the technical field of extrusion forming treatment of water-containing materials, and discloses a mud cake pressing machine for sewage treatment, which comprises a body, wherein a motor is arranged in a driving cavity, a rake arm is arranged on a connecting rod, a valve core plate is arranged at the bottom of a primary pre-pressing chamber, a plurality of valve core holes are formed in the upper surface of the primary pre-pressing chamber along the circumferential direction of the valve core plate, an upper valve cover and a lower valve cover are arranged on the connecting rod at intervals, a second butt joint hole is formed in the upper valve cover, a first butt joint hole is formed in the lower valve cover, a pressing cavity is formed between a supporting plate and the inner wall of the bottom of the body, a bottom plate is arranged in the pressing cavity, a guide row cavity is formed between the bottom plate and the inner wall of the bottom of the pressing cavity, and a pressing assembly is arranged in the pressing cavity. The invention can realize intelligent control, and after the mud cakes are pressed and molded, the mud cakes are intensively transferred to the incinerator to be incinerated together with medical solid wastes, thereby greatly shortening the treatment flow and treatment time of mud, realizing closed operation and reducing the probability of pollution diffusion.
Description
Technical Field
The invention relates to the technical field of extrusion forming treatment of water-containing materials, in particular to a mud cake pressing machine for sewage treatment.
Background
Generally, the sewage is precipitated to form slurry with larger water content, particularly the slurry formed by the sewage discharged from places such as hospitals and the like, the whole treatment process comprises primary treatment, secondary biochemical treatment, advanced treatment and killing treatment, wherein the primary treatment process comprises the processes of sedimentation, multistage filtration, separation and the like, and as sludge cakes generated in the primary treatment process of the slurry contain a large amount of pathogenic bacteria and parasitic ova, the sludge cakes need to be subjected to anaerobic digestion or are burnt together with collected medical solid waste after being dried; because the water content of the settled mud cake is still maintained at a relatively high level, the difficulty in collecting the mud cake is increased, and the mud treatment progress needs to be monitored manually in real time in the prior art, so that the requirement that the collection of the mud cake is carried out under the protection condition cannot be met, and the probability of pollutant diffusion is increased.
Disclosure of Invention
The invention aims to provide a mud cake pressing machine for sewage treatment to solve the problems.
The invention is realized by the following technical scheme:
a mud cake pressing machine for sewage treatment comprises a body, wherein a valve barrel and a primary pre-pressing cavity communicated with the valve barrel are arranged on the body, the bottom of the primary pre-pressing cavity is in a circular truncated cone shape, a driving cavity is arranged in the middle of the primary pre-pressing cavity, an inverted motor is arranged in the driving cavity, the output end of the motor is connected with a connecting rod, a rake arm with the end part attached to the inner wall of the bottom of the primary pre-pressing cavity is arranged on the connecting rod, an adjusting valve is arranged at the bottom of the primary pre-pressing cavity and comprises a circular valve core plate, a plurality of valve core holes are formed in the upper surface of the valve core plate along the circumferential direction of the valve core plate, an upper valve cover and a lower valve cover are arranged on the connecting rod at intervals, the upper valve cover and the lower valve cover are respectively contacted with the upper surface and the lower surface of the valve core plate, a second butt hole aligned with the valve core holes is formed in the upper valve cover, and a first butt hole aligned with the valve core holes is formed in the lower valve cover;
the lower section of the primary pre-pressing cavity is provided with a supporting plate which is flush with the lower valve cover, a pressing cavity is formed between the supporting plate and the inner wall of the bottom of the body, a bottom plate is arranged in the pressing cavity, the middle of the bottom plate is provided with a plurality of water permeable holes, a guide and discharge cavity is formed between the bottom plate and the inner wall of the bottom of the pressing cavity, and the pressing component is arranged in the pressing cavity and used for compressing and molding slurry which moves down the bottom of the primary pre-pressing cavity through the valve core hole. Aiming at the problems that in the prior art, the water content in the slurry formed after the precipitation of the sewage is high, especially the sewage and slurry discharged from places such as hospitals and the like cannot be dried in a closed environment or under the condition of no contact of operators during drying, and further diffusion pollution is easily caused during slurry treatment, the inventor designs a medical slurry treatment device integrating precipitation, disinfection and press-forming into a whole, so that intelligent control is realized, the slurry is intensively transferred into an incinerator after being pressed and formed to be incinerated together with medical solid waste, and the sludge treatment device needs the cooperation of different areas of different devices compared with the traditional precipitate treatment, so that the processes of dilution, pumping, drying and the like are completed, the treatment flow and the treatment time of the slurry are greatly shortened, closed operation is realized, and the probability of diffusion pollution is reduced.
When the device is used, slurry enters the primary pre-pressing cavity from the open end of the valve cylinder, meanwhile, a killing agent and a flocculating agent are put into the valve cylinder by a killing machine matched with the valve cylinder, because the slurry is continuously injected, in order to prevent the slurry in the valve cylinder from being excessively stirred or reversely filled, the upper section of the valve cylinder is communicated with the upper part of the primary pre-pressing cavity through an overflow hole, the primary drainage and speed reduction of the slurry are realized, finally, a plurality of strands of slurry are converged at the middle and lower sections of the primary pre-pressing cavity, solid particles contained in the slurry and floccule are settled at the bottom of the primary pre-pressing cavity to form a mud cake, and the mud cake is pressed and molded by the pressing cavity; in the period, the components of the sterilizing agent and the flocculating agent in the valve cylinder are in direct proportion to the flow of the injected slurry, and the reagent adding amount, the slurry flow and the rotating speed of the motor are all remotely controlled through the PLC control system, so that the intelligent and totally-enclosed treatment process is realized, and the probability of slurry diffusion pollution is greatly reduced.
The pressing assembly comprises a sealing plate, a pressing oil cylinder, a sleeve and a fixing frame, the sealing plate divides the pressing cavity into a power cavity and a compression cavity, the pressing oil cylinder is fixed in the power cavity, the fixing frame is arranged in the compression cavity, the output end of the pressing oil cylinder movably penetrates through the sealing plate and then extends into the compression cavity, a linkage rod is arranged on the extension section of the output end of the pressing oil cylinder, one end of the sleeve is closed and is connected with the linkage rod through the open end of the sleeve, the closed end of the sleeve is connected with a primary pressing plate, and movable sealing is realized between the primary pressing plate and the inner wall of the compression cavity;
a secondary laminated plate is arranged between the fixed frame and the sealing plate, the secondary laminated plate is arranged on the linkage rod in a sliding manner, a plurality of adjusting cylinders are horizontally arranged on the side wall of the sealing plate, which is opposite to the laminating oil cylinder, the output ends of the adjusting cylinders are connected with the side wall of the secondary laminated plate, and the secondary laminated plate and the primary laminated plate are respectively positioned on two sides of the fixed frame;
when the pressing cylinder and the adjusting cylinder drive the secondary pressing plate and the primary pressing plate to move relatively, and the mud entering the compression chamber is pressed and molded. Furthermore, the mud with relatively large water content is firstly filtered by a plurality of water permeable holes which are right opposite to the valve core hole, and flocculation treatment is carried out in the primary pre-pressing chamber, so that small solid phase in the compression chamber is extremely small, after the mud is gathered in enough quantity and the valve core hole is sealed by the lower valve cover, the pressing oil cylinder is started to drive the primary pressing plate to move towards the direction close to the fixed frame until the primary pressing plate is attached to the fixed frame, the side wall of the primary pressing plate which is right opposite to the fixed frame is provided with a sealing element, the secondary pressing plate and the supporting plate as well as the secondary pressing plate and the bottom plate are both in dynamic sealing, namely, the relatively closed state in the molding area can be realized, then a plurality of adjusting cylinders are started, so that the secondary pressing plate also moves towards the direction close to the fixed frame to extrude the gathered mud cakes, the pressed mud cakes continuously inject most of liquid of the pressed mud cakes into the guide and discharge cavity through the water permeable holes, and the arrangement of the water permeable holes can ensure that most of the mud cakes stay in the solid phase compression cavity; when the extrusion time of the mud cakes reaches the preset standard time and the formed mud blocks do not release liquid, the output end of the adjusting cylinder and the output end of the pressing oil cylinder extend out to drive the secondary pressing plate to push the mud blocks to completely pass through the fixing frame and then stop, and the formed mud blocks are handed to equipment corresponding to the next procedure to be subjected to related operation.
In an initial state, a dividing cavity is formed between one side wall of the primary pressing plate back to the fixed frame and the side wall of the pressing cavity, a shearing seam is formed in the middle of the dividing cavity, a through hole corresponding to the shearing seam is formed in the outer wall of the sleeve in the axial direction of the sleeve, and a cutting blade positioned outside the body sequentially penetrates through the shearing seam and the through hole to cut the formed mud block; two driving cylinders are vertically arranged on the inner wall of the cutting chamber, and a top plate is arranged at the output end of each driving cylinder; at least two guide grooves are arranged on the inner circumferential wall of the sleeve along the axial direction of the sleeve, a locking block matched with the guide grooves is arranged on the outer wall of the linkage rod, an annular groove communicated with the guide grooves is formed in the inner wall of the sleeve, and the axial length of the annular groove is greater than that of the locking block. Further, after the secondary laminated board pushes the mud blocks to the dividing chamber, the external driving device horizontally pushes the cutting blades, the cutting blades are cut into the middle of the mud blocks through the cutting seams, then the cutting blades continuously move after penetrating through the through holes until the formed mud blocks are divided into two, and then the two driving cylinders are started, so that the two top plates sequentially push the two small mud blocks to an outlet formed in the wall of the dividing chamber and the two small mud blocks are transmitted to a storage area through the corresponding transmission systems.
A disc is rotatably arranged on the connecting rod, a plurality of rake arms are fixed on the outer circumferential wall of the disc along the radial direction of the disc, and a scraping block which is contacted with the inner wall of the bottom of the primary pre-pressing chamber is arranged at the end part of each rake arm;
two ratchet wheels are fixed on the outer circumferential wall of the lower section of the connecting rod at intervals, cylindrical cavities are formed in the upper valve cover and the lower valve cover, a through hole communicated with the middle part of the cylindrical cavity is formed in the upper valve cover, a circular groove communicated with the cylindrical cavity is formed in the upper surface of the lower valve cover, the lower end of the connecting rod penetrates through the through hole and the circular groove in sequence and then is placed in the cylindrical cavity of the lower valve cover, the two ratchet wheels are placed in the two cylindrical cavities respectively, two pawls meshed with the ratchet wheels are symmetrically arranged on the inner circumferential wall of each cylindrical cavity along the axis of the cylindrical cavity, and the outer diameter of each ratchet wheel is larger than the inner diameter of the through hole and the inner diameter of the circular groove;
the middle part of the disc is provided with a guide hole for the connecting rod to pass through, a plurality of arc-shaped grooves are arranged on the inner wall of the disc at intervals along the circumferential direction of the guide hole, and a plurality of shifting forks corresponding to the arc-shaped grooves are arranged on the outer circumferential wall of the connecting rod. Furthermore, according to the technical scheme, the end part of the rake arm is provided with the scraping block attached to the inner wall of the bottom of the primary pre-pressing cavity, so that the downward movement of settled slurry can be accelerated, the motor drives the rake arm to rotate for a period of time and then starts to rotate reversely, the length of the rake arm is larger than the radius of the circular upper valve cover and the circular lower valve cover, the shifting fork rotates reversely in the arc-shaped groove, the two side walls of the shifting fork are provided with the travel switches electrically connected with the motor, and the travel switches are triggered after the shifting fork rotates reversely to be in contact with the inner wall of the other end of the arc-shaped groove, so that the motor is controlled to stop working; and this technical scheme all is equipped with the cylinder chamber in last valve gap and the lower valve gap, the cylinder intracavity is equipped with the ratchet meshing on pawl and the connecting rod, be limited by the locking of pawl to the ratchet this moment, make the reverse rotation in order to realize the synchronization of upper valve gap, lower valve gap and connecting rod formation one whole, first butt joint hole, second butt joint hole realizes simultaneously with the valve core hole centering, the motor stops working, the mud cake is then continued to move down along the valve core hole after scattering until will pressfitting chamber is filled up, the motor forward rotates once more, make upper valve gap and lower valve gap seal the valve core hole again, can carry out the pressfitting molding process of mud.
The inner diameter of the valve core hole is gradually reduced from top to bottom along the axis of the valve core hole, the inner diameter of the second butt joint hole in the upper valve cover is the same as the inner diameter of the large-diameter end of the valve core hole, and the inner diameter of the first butt joint hole in the lower valve cover is the same as the inner diameter of the small-diameter end of the valve core hole. Preferably, the longitudinal section of the valve core hole is in a circular truncated cone shape with a large upper part and a small lower part, so that the mud cake at the bottom of the primary pre-pressing cavity can be sucked quickly, the sucked speed of the mud cake can be prevented from being too high to a certain extent, and the sediment layer at the bottom of the primary pre-pressing cavity is prevented from being completely damaged.
And bearings are respectively arranged in the through hole and the circular groove, the inner ring of each bearing is connected with the outer circumferential wall of the connecting rod, and the two ends of the through hole and the upper end of the circular groove are sealed through sealing rings. Preferably, the bearing can increase the connecting rod and have certain length connecting rod steady rotation in vertical direction, and the sealing ring can avoid ratchet and pawl to soak under the mud environment.
A plurality of sliding pins are arranged on the upper surface of the upper valve cover. Preferably, the sliding pin arranged on the upper valve cover can divide mud cakes settled at the bottom of the primary pre-pressing cavity in the rotating process, so that the over-thick mud cakes are prevented from smoothly dispersing and moving downwards to the pressing cavity.
The upper section of the valve cylinder is horizontally provided with a swing rod, and a plurality of adjustable valve plates are obliquely arranged on the swing rod; and the lower end of the valve cylinder is provided with a primary valve core plate matched with the valve cylinder, and a plurality of primary valve holes are formed in the primary valve core plate. Furthermore, when the slurry is continuously injected into the valve cylinder, the inclined adjustable valve plate can buffer and adjust the flow rate of the slurry, so that water flow is prevented from sputtering or generating rotational flow in the valve cylinder, and the primary valve core plate positioned below the adjustable valve plate is provided with a plurality of primary valve holes, so that the rapidly flowing liquid can be shunted, and the mixing degree of a sterilizing agent, a flocculating agent and the like with the liquid is accelerated.
A secondary pre-pressing cavity communicated with the primary pre-pressing cavity is further arranged in the body, a water pump is arranged at the upper part of the secondary pre-pressing cavity, the liquid outlet end of the water pump is communicated with the outside through an external discharge pipe, a slurry pump is arranged at the lower part of the secondary pre-pressing cavity, and the water outlet end of the slurry pump is communicated with the valve barrel through a return pipe; and a secondary valve core plate is arranged in the middle of the secondary pre-pressing cavity and provided with a plurality of secondary valve holes. Further, liquid which is subjected to primary precipitation and has low particulate matter content enters the secondary pre-pressing cavity through the diversion holes, secondary sedimentation is carried out in the secondary pre-pressing cavity, at the moment, the solid-liquid separation is realized through the mud which is subjected to sterilization, precipitation, pressing and secondary precipitation, the upper part of the secondary pre-pressing cavity is communicated with an external pumping and discharging system, and the liquid at the upper part of the secondary pre-pressing cavity is discharged for further purification treatment; most of solid phases in the slurry are settled in the primary pre-pressing cavity, liquid with relatively low solid phase content enters the upper part of the secondary pre-pressing cavity through the diversion holes, the flow rate of the liquid at the moment is relatively slow, solid phase particles with certain gravity freely settle and fall into the bottom of the secondary pre-pressing cavity after passing through a secondary valve hole in the secondary valve core plate, the secondary valve core plate mainly plays a role in smoothing fluctuation of the liquid in the secondary pre-pressing cavity, the water pump and the solid phase pump respectively send the liquid phase after the secondary settlement treatment and part of the solid phase which does not complete the primary settlement to corresponding areas, if the liquid phase after the secondary settlement treatment is discharged into a container in the next treatment procedure by an outer discharge pipe, and the part of the solid phase which does not complete the primary settlement enters the valve barrel again through a return pipe to be treated again.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention integrates precipitation, disinfection and press-forming into a whole, realizes intelligent control, is intensively transferred to the incinerator for incineration treatment together with medical solid waste after the mud cake is pressed and formed, and greatly shortens the treatment flow and treatment time of mud compared with the traditional sediment treatment which needs the cooperation of different devices and multiple areas to complete the procedures of dilution, pumping, drying and the like, and realizes closed operation and reduces the probability of diffusion pollution;
2. after the mud block is cut, the output end of the pressing oil cylinder retracts for a certain distance, so that the locking block on the linkage rod moves out of the guide groove until completely enters the annular groove, the axial length of the annular groove is greater than that of the locking block, the normal movement of the linkage rod and the sleeve is not affected by the matching between the locking block and the annular groove, the mutual limitation between the sleeve and the linkage rod is removed in the circumferential direction, namely after the cutting blade is reset, when the top plate horizontally extends out, the rolling friction exists between the sleeve and the small mud block, the resistance borne by the top plate is reduced, and the small mud block moves smoothly;
3. the longitudinal section of the valve core hole is in a round table shape with a large upper part and a small lower part, so that mud cakes at the bottom of the primary pre-pressing cavity can be sucked quickly, the suction speed of the mud cakes can be prevented from being too high to a certain extent, and the mud cakes formed at the bottom of the primary pre-pressing cavity are prevented from being completely damaged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a longitudinal cross-sectional view of the present invention;
FIG. 2 is an enlarged sectional view taken at A in FIG. 1;
FIG. 3 is a transverse cross-sectional view of the disk;
FIG. 4 is a partial cross-sectional view of the sleeve;
fig. 5 is a longitudinal sectional view of the upper bonnet.
Reference numbers and corresponding part names in the drawings:
1-valve cylinder, 2-swing rod, 3-overflow hole, 4-drive cavity, 5-motor, 6-primary pre-pressing cavity, 7-body, 8-shunt hole, 9-baffle, 10-outer discharge pipe, 11-water pump, 12-secondary valve core plate, 13-secondary valve hole, 14-secondary pre-pressing cavity, 15-return pipe, 16-slurry pump, 17-shear seam, 18-drive cylinder, 19-top plate, 20-partition cavity, 21-primary pressing plate, 22-fixed frame, 23-bottom plate, 24-water-permeable hole, 25-discharge pipe, 26-discharge guide cavity, 27-pressing oil cylinder, 28-sealing plate, 29-adjusting cylinder, 30-organ cover, 31-secondary pressing plate, 32-sleeve, 33-adjustable valve plate, 34-primary valve core plate, 35-rake arm, 36-upper valve cover, 37-scraping block, 38-support plate, 39-valve core hole, 40-valve core plate, 41-valve core plate, 42-lower connecting hole, 43-first pair connecting rod, 44-connecting rod, 45-shifting fork groove, 45-upper valve cover, 37-scraping block, 38-scraping block, 39-cylindrical pin, 55-cylindrical pin, 48-through hole, and second pair of ratchet rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limiting the present invention.
Example 1
As shown in fig. 1 to 5, the present embodiment includes a body 7, a valve barrel 1 with an open top is disposed at the upper portion of the body 7, a partition plate 9 is disposed inside the body 7, the partition plate 9 divides the inside of the body 7 into a primary pre-pressing chamber 6 and a secondary pre-pressing chamber 14, a plurality of overflow holes 3 communicated with the primary pre-pressing chamber 6 are opened on the side wall of the valve barrel 1, the bottom of the valve barrel 1 is communicated with the bottom of the primary pre-pressing chamber 6, the bottom of the primary pre-pressing chamber 6 is in a circular truncated cone shape, a driving chamber 4 is disposed in the middle of the primary pre-pressing chamber 6, an inverted motor 5 is disposed in the driving chamber 4, an output end of the motor 5 is connected to a connecting rod 44, a rake arm 35 with an end portion thereof attached to the inner wall of the bottom of the primary pre-pressing chamber 6 is disposed on the bottom of the primary pre-pressing chamber 6, the adjusting valve includes a circular valve core plate 41, a plurality of valve core holes 40 are opened on the upper surface thereof along the circumferential direction of the valve core plate 41, an upper valve cover 36 and a lower valve cover 42 are disposed on the connecting rod 44 at intervals, the upper surface of the upper valve cover 36 and the lower valve cover 42 are respectively contacted with a pair of the lower valve cover 42, and a second pair of the upper hole 43 is opened on the lower surface of the valve cover 40;
a supporting plate 38 which is flush with the lower valve cover 42 is arranged at the lower section of the primary pre-pressing cavity 6, a pressing cavity is formed between the supporting plate 38 and the inner wall of the bottom of the body 7, a bottom plate 23 is arranged in the pressing cavity, a plurality of water permeable holes 24 are formed in the middle of the bottom plate 23, a guide and discharge cavity 26 is formed between the bottom plate 23 and the inner wall of the bottom of the pressing cavity, and a pressing component is arranged in the pressing cavity and is used for compressing and molding slurry which moves downwards from the bottom of the primary pre-pressing cavity 6 through the valve core hole 40;
a plurality of branch holes 8 are formed in the partition plate 9, and the branch holes 8 are used for realizing the communication between the upper part of the primary precompression chamber 6 and the secondary precompression chamber 14.
In the specific operation of the embodiment, the slurry enters the primary pre-pressing chamber 6 from the open end of the valve cylinder 1, and meanwhile, a sterilization machine matched with the primary pre-pressing chamber puts a sterilization reagent and a flocculating agent into the valve cylinder 1, because the slurry is continuously injected, in order to prevent the slurry in the valve cylinder 1 from being excessively stirred or inversely filled, the upper section of the valve cylinder 1 is communicated with the upper part of the primary pre-pressing chamber 6 through the overflow hole 3, so that the primary drainage and deceleration of the slurry are realized, finally, a plurality of strands of slurry are converged at the lower section of the primary pre-pressing chamber 6, solid particles and flocculates contained in the slurry are settled at the bottom of the primary pre-pressing chamber 6 to form a mud cake, the mud cake is pressed and molded by the pressing chamber, the liquid which is subjected to primary sedimentation and has less particulate matter content enters the secondary pre-pressing chamber 14 through the shunt hole 8, the liquid which is subjected to secondary sedimentation in the secondary pre-pressing chamber 14, at the moment, the solid-liquid which is subjected to sterilization, sedimentation, pressing and secondary sedimentation, the upper part of the slurry in the secondary pre-pressing chamber 14 is communicated with an external pumping system, and the liquid at the upper part of the secondary pre-pressing chamber 14 is discharged and purified.
Wherein, the flocculate settled by the gravity factor and the solid-phase particles with larger size move to the inner wall of the bottom of the primary pre-pressing chamber 6 with larger size and smaller size, the plurality of rake arms 35 can prevent the water content in the slurry from being too low and attaching to the inner wall of the bottom of the primary pre-pressing chamber 6 while driving the flocculate and the solid-phase particles with larger size to form mud cakes, and in the initial state, the upper valve cover 36 and the lower valve cover 42 seal the valve core hole 40 on the valve core plate 41, the rotation of the rake arms 35 is started under the premise that a certain amount of mud cakes are accumulated at the bottom of the primary pre-pressing chamber 6, the rake arms 35 start to rotate at a slow speed under the driving of the motor 5, and simultaneously the upper valve cover 36, the lower valve cover 42 and the connecting rod 44 rotate synchronously, i.e. periodically open and close the valve core hole 40, and the slurry enters the pressing chamber after passing through the second butt hole 57, the valve core hole 40 and the first butt hole 43 during the opening of the valve core hole 40, and is extruded and dehydrated and formed by the pressing assembly.
It should be noted that, the mud inflow with relatively large water content is periodically adjusted, so that the mud cake which has been already deposited in the primary pre-pressing chamber 6 can be prevented from greatly fluctuating, the deposited layer in the region is prevented from being damaged, the probability of large-scale upward floating of the mud is reduced, while the mud cake entering the pressing chamber is collected, the liquid contained in the mud cake is firstly filtered through the water permeable hole 24 with relatively small aperture, when the mud cake collection amount in the pressing chamber meets the preset requirement, the motor 5 stops rotating, at this time, the valve core hole 40 is sealed again by the upper valve cover 36 and the lower valve cover 42, the pressing assembly starts to work, so that the liquid doped in the mud cake in the pressing chamber can only move to the guide and discharge chamber 26 along the water permeable hole 24, and the part of the liquid can return to the valve barrel 1 again for secondary treatment through the guide and discharge pipe 25, thus the treatment process of the solid phase in the mud is completed.
Preferably, most of the solid phase in the slurry has already settled in the primary pre-pressing chamber 6, the liquid with relatively low solid content enters the upper part of the secondary pre-pressing chamber 14 through the diversion hole 8, the flow rate of the liquid at this time is relatively slow, solid phase particles with certain gravity freely settle and fall to the bottom of the secondary pre-pressing chamber 14 after passing through the secondary valve hole 13 on the secondary valve core plate 12, the secondary valve core plate 12 mainly functions to smooth the fluctuation of the liquid in the secondary pre-pressing chamber 14, the water pump 11 and the slurry pump 16 respectively send the liquid phase after the secondary settlement treatment and part of the solid phase without primary settlement to corresponding areas, if the liquid phase after the secondary settlement treatment is discharged to a container in the next treatment process by the outer discharge pipe 10, and part of the solid phase without primary settlement is re-entered into the valve barrel 1 through the return pipe 15 for re-treatment.
In this embodiment, the connection portion between the bottom of the primary pre-pressing cavity 6 and the pressing cavity is defined in detail as follows:
a disc 39 is rotatably arranged on the connecting rod 44, a plurality of harrow arms 35 are fixed on the outer circumferential wall of the disc 39 along the radial direction of the disc 39, and a scraping block 37 which is contacted with the inner wall of the bottom of the primary pre-pressing chamber 6 is arranged at the end part of each harrow arm 35; two ratchet wheels 56 are fixed on the outer circumferential wall of the lower section of the connecting rod 44 at intervals, cylindrical cavities 52 are formed in the upper valve cover 36 and the lower valve cover 42, a through hole communicated with the middle part of the cylindrical cavity 52 is formed in the upper valve cover 36, a circular groove communicated with the cylindrical cavity 52 is formed in the upper surface of the lower valve cover 42, the lower end of the connecting rod 44 penetrates through the through hole and the circular groove in sequence and then is placed in the cylindrical cavity 52 of the lower valve cover 42, the two ratchet wheels 56 are placed in the two cylindrical cavities 52 respectively, two pawls 53 meshed with the ratchet wheels 56 are symmetrically arranged on the inner circumferential wall of each cylindrical cavity 52 along the axis of the cylindrical cavity 52, and the outer diameter of each ratchet wheel 56 is larger than the inner diameters of the through hole and the circular groove; a guide hole for the connecting rod 44 to pass through is formed in the middle of the disc 39, a plurality of arc-shaped grooves 45 are arranged on the inner wall of the guide hole at intervals along the circumferential direction of the guide hole, and a plurality of shifting forks 46 corresponding to the arc-shaped grooves 45 are arranged on the outer circumferential wall of the connecting rod 44.
When the amount of mud cakes accumulated at the bottom of the primary pre-pressing chamber 6 is suddenly or continuously increased, the alignment of the valve core hole 40 and the first and second alignment holes 43 and 57 cannot meet the processing progress of the whole system, therefore, according to the technical scheme, the end part of the rake arm 35 is provided with the scraping block 37 attached to the inner wall of the bottom of the primary pre-pressing chamber 6, so that the downward movement of the settled mud cakes can be accelerated, and the motor 5 drives the rake arm 35 to rotate for a period of time and then start to rotate reversely, because the length of the rake arm 35 is larger than the radius of the circular upper valve cover 36 and the circular lower valve cover 42, the shifting fork 46 rotates reversely in the arc-shaped groove 45, the two side walls of the shifting fork 46 are provided with travel switches electrically connected with the motor 5, and the travel switches are triggered after the shifting fork 46 rotates reversely to be in contact with the inner wall of the other end of the arc-shaped groove 45, so as to control the motor 5 to stop working;
in addition, in the present embodiment, the cylindrical cavities 52 are respectively arranged inside the upper valve cover 36 and the lower valve cover 42, the pawls 53 arranged in the cylindrical cavities 52 are engaged with the ratchet wheels 56 on the connecting rod 44, and at this time, the pawls 53 are limited to lock the ratchet wheels 56, so that the upper valve cover 36, the lower valve cover 42 and the connecting rod 44 form a whole to realize synchronous reverse rotation, the first connection hole 43 and the second connection hole 57 are simultaneously aligned with the valve core hole 40, the motor 5 stops working, the mud cake continuously moves downwards along the valve core hole 40 until the pressing cavity is filled, the motor 5 rotates forwards again, so that the upper valve cover 36 and the lower valve cover 42 close the valve core hole 40 again, and the pressing molding process of the mud cake can be performed. It should be noted that, when the shifting fork 46 is separated from the contact with the inner wall of one end of the arc-shaped groove 45 and moves to the other end thereof, the second aligning hole 57 of the upper valve cover 36 and the first aligning hole 43 of the lower valve cover 42 complete the alignment with the valve core hole 40, and the rake arm 35 does not rotate at this time, so that while the work load of the motor 5 is reduced, the solid-phase surge caused by the rotation of the rake arm 35 and the synchronous downward movement of slurry can be effectively avoided, that is, the excessive damage of the sediment layer at the bottom of the primary pre-pressing chamber 6 is avoided, and excessive liquid is prevented from entering the pressing chamber, so as to improve the treatment efficiency of the whole system.
Preferably, the longitudinal section of the valve core hole 40 is in a truncated cone shape with a large upper part and a small lower part, so that mud at the bottom of the primary pre-pressing chamber 6 can be sucked quickly, the mud cake can be prevented from being sucked at an excessively high speed to a certain extent, and a sediment layer at the bottom of the primary pre-pressing chamber 6 is prevented from being completely damaged. It should be noted that, in the present embodiment, the inner diameter of the valve core hole 40 decreases from top to bottom along the axis thereof, the inner diameter of the second connection hole 57 on the upper valve cover 36 is the same as the inner diameter of the large-diameter end of the valve core hole 40, and the inner diameter of the first connection hole 43 on the lower valve cover 42 is the same as the inner diameter of the small-diameter end of the valve core hole 40.
Preferably, the bearing 54 is provided to increase the smooth rotation of the connecting rod 44 with a certain length of the connecting rod 44 in the vertical direction, while the sealing ring 55 prevents the ratchet 56 and the pawl 53 from being soaked in mud.
Preferably, the sliding pin 51 provided on the upper valve cover 36 can divide the mud cake settled at the bottom of the primary pre-pressing chamber 6 during the rotation process, so as to prevent the over-thick mud cake from moving down to the pressing chamber.
Example 2
As shown in fig. 1~5, this embodiment further defines a press-fit assembly for press-fit molding of primary settled slurry based on embodiment 1,
the sealing device comprises a sealing plate 28, a pressing oil cylinder 27, a sleeve 32 and a fixing frame 22, wherein the sealing plate 28 divides a pressing cavity into a power cavity and a compression cavity, the pressing oil cylinder 27 is fixed in the power cavity, the fixing frame 22 is arranged in the compression cavity, the output end of the pressing oil cylinder 27 movably penetrates through the sealing plate 28 and then extends into the compression cavity, a linkage rod 47 is arranged on an extending section of the output end of the pressing oil cylinder 27, one end of the sleeve 32 is closed and is connected with the linkage rod 47 through the open end of the sleeve 32, the closed end of the sleeve 32 is connected with a primary pressing plate 21, and movable sealing is realized between the primary pressing plate 21 and the inner wall of the compression cavity; a secondary laminated plate 31 is arranged between the fixed frame 22 and the sealing plate 28, the secondary laminated plate 31 is arranged on the linkage rod 47 in a sliding manner, a plurality of adjusting cylinders 29 are horizontally arranged on the side wall of the sealing plate 28 back to the pressing oil cylinder 27, the output ends of the adjusting cylinders 29 are connected with the side wall of the secondary laminated plate 31, and the secondary laminated plate 31 and the primary laminated plate 21 are respectively positioned at two sides of the fixed frame 22; when in pressing, the first butt joint hole 43 and the second butt joint hole 57 are staggered with the valve core hole 40, and the pressing oil cylinder 27 and the adjusting cylinder 29 drive the secondary laminated plate 31 and the primary laminated plate 21 to move relatively, so that the pressing and molding of the slurry entering the compression chamber are realized.
The mud with relatively large water content is firstly subjected to water filtration treatment through the plurality of water permeable holes 24 opposite to the valve core hole 40, and flocculation treatment is performed in the primary pre-pressing chamber 6, so that small-size solid phases in the compression chamber are extremely small, after the forming amount of mud cakes is enough and the valve core hole 40 is sealed by the lower valve cover 42, the pressing oil cylinder 27 is started to drive the primary pressing plate 21 to move towards the direction close to the fixed frame 22 until the primary pressing plate 21 is attached to the fixed frame 22, and a sealing member is arranged on the side wall of the primary pressing plate 21 opposite to the fixed frame 22, dynamic sealing is respectively performed between the secondary pressing plate 31 and the supporting plate 38 and between the secondary pressing plate 31 and the bottom plate 23, namely, a relatively closed state in a forming area can be realized, then the plurality of adjusting cylinders 29 are started to enable the secondary pressing plate 31 to move towards the direction close to the fixed frame 22 to start to extrude the gathered mud cakes, the pressed mud cakes are continuously injected into the guide and discharge cavity 26 through the water permeable holes 24, and the arrangement of the most of the water permeable holes 24 can ensure that most solid phases in the mud cakes stay in the compression cavity; when the extrusion time of the mud cakes reaches the preset standard time and the gradually-formed mud blocks do not release liquid any more, the output end of the adjusting cylinder 29 and the output end of the pressing oil cylinder 27 extend out to drive the secondary pressing plate 31 to push the mud blocks to completely pass through the fixed frame 22 and then stop, and at the moment, the formed mud blocks are handed to equipment corresponding to the next process for relevant operation. Wherein, an organ cover 30 is added around the adjusting cylinder 29, and two ends of the organ cover 30 are respectively connected with the sealing plate 28 and the secondary laminated plate 31 to protect the adjusting cylinder 29.
In the initial state, a dividing cavity 20 chamber is formed between one side wall of the primary laminated plate 21, which is back to the fixed frame 22, and the side wall of the pressing cavity, the middle part of the dividing cavity 20 chamber is provided with a shearing seam 17, the outer wall of the sleeve 32 is provided with a through hole 50 corresponding to the shearing seam 17 along the axial direction of the sleeve, and a cutting blade positioned outside the body 7 sequentially penetrates through the shearing seam 17 and the through hole 50 to complete the cutting of the formed mud block; two driving cylinders 18 are vertically arranged on the inner wall of the cutting chamber, and the output ends of the driving cylinders 18 are provided with top plates 19; at least two guide grooves are arranged on the inner circumferential wall of the sleeve 32 along the axial direction, the end part of the linkage rod 47 is arranged in the sleeve 32, a lock pin 48 with the outer diameter smaller than that of the linkage rod 47 is arranged on the end part of the linkage rod 47, a lock block 49 matched with the guide grooves is arranged on the outer wall of the lock pin 48, an annular groove communicated with the plurality of guide grooves is formed in the inner wall of the sleeve 32, and the axial length of the annular groove is larger than that of the lock block 49. The smaller diameter of the pin 48 is disposed within the sleeve 32 to reduce wear between the pin 48 and the sleeve 32 to some extent.
After the secondary laminated plate 31 pushes the mud blocks to the chamber of the dividing chamber 20, an external driving device horizontally pushes a cutting blade, the cutting blade is cut into the middle of the mud blocks through a cutting slit 17, then passes through the through holes 50 and continues to move until the formed mud blocks are divided into two, and then two driving cylinders 18 are started, so that two top plates 19 sequentially push the two small mud blocks to an outlet formed in the chamber wall of the dividing chamber 20 and the two small mud blocks are transmitted to a storage area by a corresponding transmission system; because the sleeve 32 is embedded into the slurry in the pressing cavity, the formed mud block completely wraps the sleeve 32, the top plate 19 is pushed by a large resistance, and the cut small mud block is likely to jump and collide with the inner wall of the cutting cavity 20 when moving, therefore, in the embodiment, the annular groove and at least two guide grooves are arranged on the inner circumferential wall of the sleeve 32, the annular groove is communicated with the guide grooves, after the mud block is cut, the output end of the pressing oil cylinder 27 retracts for a certain distance, so that the locking block 49 on the linkage rod 47 moves out of the guide grooves until completely entering the annular groove, the axial length of the annular groove is greater than that of the locking block 49, at the moment, the normal movement of the linkage rod 47 and the sleeve 32 cannot be affected by the matching between the locking block 49 and the annular groove, the mutual limitation between the sleeve 32 and the linkage rod 47 is removed in the circumferential direction, namely, when the top plate 19 horizontally extends out after resetting, the sleeve 32 and the small mud block are in rolling friction, so that the resistance of the top plate 19 is reduced, and the movement of the small mud block is smoother.
Example 3
As shown in fig. 1~5, in this embodiment, based on embodiment 1, the internal structure of the valve cylinder 1 is also described in detail, that is, the swing rod 2 is horizontally disposed at the upper section of the valve cylinder 1, and the swing rod 2 is obliquely disposed with a plurality of adjustable valve plates 33; and a primary valve core plate 34 matched with the valve cylinder 1 is arranged at the lower end of the valve cylinder 1, and a plurality of primary valve holes are formed in the primary valve core plate 34.
When the slurry is continuously injected into the valve cylinder 1, the inclined adjustable valve plate 33 can buffer and adjust the flow rate of the slurry, so that water flow is prevented from sputtering or rotational flow is generated in the valve cylinder 1, and the primary valve core plate 34 positioned below the adjustable valve plate 33 is provided with a plurality of primary valve holes, so that the rapidly flowing liquid can be shunted, and the mixing degree of a sterilization agent, a flocculating agent and the like with the liquid is accelerated; preferably, in the technical scheme, a plurality of sliding grooves are formed in the inner wall of the valve cylinder 1 in the vertical direction, sliding blocks matched with the sliding grooves are arranged on the outer side wall of the primary valve core plate 34, the primary valve core plate 34 is made of anti-corrosion rubber, and the primary valve core plate 34 has certain displacement capacity in the valve cylinder 1 due to the injected fluid and the characteristics of the primary valve core plate 34 in a liquid environment, so that the fluctuation of the liquid in the valve cylinder 1 and the fluctuation of the bottom of the primary pre-pressing chamber 6 can be effectively balanced, and the gathering amount of mud cakes is increased.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a mud cake pressfitting machine for sewage treatment, includes body (7), is equipped with valve barrel (1) on body (7) and preliminary pressfitting cavity (6) that communicate with valve barrel (1), its characterized in that: the bottom of the primary pre-pressing cavity (6) is in a circular truncated cone shape, a driving cavity (4) is arranged in the middle of the primary pre-pressing cavity (6), an inverted motor (5) is arranged in the driving cavity (4), the output end of the motor (5) is connected with a connecting rod (44), a rake arm (35) with the end part attached to the inner wall of the bottom of the primary pre-pressing cavity (6) is arranged on the connecting rod (44), a regulating valve is arranged at the bottom of the primary pre-pressing cavity (6), the regulating valve comprises a circular valve core plate (41), a plurality of valve core holes (40) are formed in the upper surface of the valve core plate (41) along the circumferential direction of the valve core plate (41), an upper valve cover (36) and a lower valve cover (42) are arranged on the connecting rod (44) at intervals, the upper valve cover (36) and the lower valve cover (42) are respectively contacted with the upper surface and the lower surface of the valve core plate (41), a second aligning hole (57) which is aligned with the valve core hole (40) is formed in the upper valve cover (36), and a first aligning hole (43) which is aligned with the valve core hole (40) is formed in the lower valve cover (42);
the lower section of the primary pre-pressing cavity (6) is provided with a supporting plate (38) which is flush with the lower valve cover (42), a pressing cavity is formed between the supporting plate (38) and the inner wall of the bottom of the body (7), a bottom plate (23) is arranged in the pressing cavity, the middle of the bottom plate (23) is provided with a plurality of water permeable holes (24), a guide and discharge cavity (26) is formed between the bottom plate (23) and the inner wall of the bottom of the pressing cavity, and a pressing component is arranged in the pressing cavity and used for compressing and molding slurry which moves down the bottom of the primary pre-pressing cavity (6) through the valve core hole (40).
2. The mud cake press for sewage treatment as claimed in claim 1, wherein: the pressing assembly comprises a sealing plate (28), a pressing oil cylinder (27), a sleeve (32) and a fixing frame (22), the sealing plate (28) divides a pressing cavity into a power cavity and a compression cavity, the pressing oil cylinder (27) is fixed in the power cavity, the fixing frame (22) is arranged in the compression cavity, the output end of the pressing oil cylinder (27) movably penetrates through the sealing plate (28) and extends into the compression cavity, a linkage rod (47) is arranged on an extending section of the output end of the pressing oil cylinder (27), one end of the sleeve (32) is closed and is connected with the linkage rod (47) through the open end of the sleeve, the closed end of the sleeve (32) is connected with a primary pressing plate (21), and movable sealing is realized between the primary pressing plate (21) and the inner wall of the compression cavity;
a secondary laminated plate (31) is arranged between the fixed frame (22) and the sealing plate (28), the secondary laminated plate (31) is arranged on the linkage rod (47) in a sliding manner, a plurality of adjusting cylinders (29) are horizontally arranged on the side wall of the sealing plate (28) back to the pressing oil cylinder (27), the output ends of the adjusting cylinders (29) are connected with the side wall of the secondary laminated plate (31), and the secondary laminated plate (31) and the primary laminated plate (21) are respectively positioned on two sides of the fixed frame (22);
when in pressing, the first butt joint hole (43) on the lower valve cover (42) is staggered with the valve core hole (40), and the pressing oil cylinder (27) and the adjusting air cylinder (29) drive the secondary pressing plate (31) and the primary pressing plate (21) to move relatively, so that the pressing and molding of slurry entering the compression chamber are realized.
3. The mud cake press for sewage treatment as claimed in claim 2, wherein: in an initial state, a dividing cavity (20) chamber is formed between one side wall of the primary laminated plate (21) back to the fixed frame (22) and the side wall of the laminating cavity, a shearing seam (17) is formed in the middle of the dividing cavity (20) chamber, a through hole (50) corresponding to the shearing seam (17) is formed in the outer wall of the sleeve (32) along the axial direction of the sleeve, and a cutting blade located outside the body (7) penetrates through the shearing seam (17) and the through hole (50) in sequence to complete cutting of the formed mud block; two driving cylinders (18) are vertically arranged on the inner wall of the cutting chamber, and a top plate (19) is arranged at the output end of each driving cylinder (18);
at least two guide grooves are arranged on the inner circumferential wall of the sleeve (32) along the axial direction of the sleeve, a locking block (49) matched with the guide grooves is arranged on the outer wall of the linkage rod (47), an annular groove communicated with the guide grooves is formed in the inner wall of the sleeve (32), and the axial length of the annular groove is greater than that of the locking block (49).
4. The mud cake press for sewage treatment as claimed in claim 1, wherein: a disc (39) is rotatably arranged on the connecting rod (44), a plurality of harrow arms (35) are fixed on the outer circumferential wall of the disc (39) along the radial direction of the disc (39), and a scraping block (37) which is contacted with the inner wall of the bottom of the primary pre-pressing cavity (6) is arranged at the end part of each harrow arm (35);
two ratchet wheels (56) are fixed on the outer circumferential wall of the lower section of the connecting rod (44) at intervals, cylindrical cavities (52) are formed in the upper valve cover (36) and the lower valve cover (42), a through hole communicated with the middle of the cylindrical cavity (52) is formed in the upper valve cover (36), a circular groove communicated with the cylindrical cavity (52) is formed in the upper surface of the lower valve cover (42), the lower end of the connecting rod (44) penetrates through the through hole and the circular groove in sequence and then is placed in the cylindrical cavity (52) of the lower valve cover (42), the two ratchet wheels (56) are placed in the two cylindrical cavities (52) respectively, two pawls (53) meshed with the ratchet wheels (56) are symmetrically arranged on the inner circumferential wall of each cylindrical cavity (52) along the axis of the cylindrical cavity, and the outer diameters of the ratchet wheels (56) are larger than the inner diameters of the through hole and the circular groove;
a guide hole for the connecting rod (44) to pass through is formed in the middle of the disc (39), a plurality of arc-shaped grooves (45) are arranged on the inner wall of the guide hole at intervals along the circumferential direction of the guide hole, and a plurality of shifting forks (46) corresponding to the arc-shaped grooves (45) are arranged on the outer circumferential wall of the connecting rod (44).
5. The mud cake press for sewage treatment as claimed in claim 4, wherein: the inner diameter of the valve core hole (40) is gradually reduced from top to bottom along the axis of the valve core hole, the inner diameter of the second butt joint hole (57) in the upper valve cover (36) is the same as the inner diameter of the large-diameter end of the valve core hole (40), and the inner diameter of the first butt joint hole (43) in the lower valve cover (42) is the same as the inner diameter of the small-diameter end of the valve core hole (40).
6. A mud cake press for sewage treatment according to claim 5, wherein: and bearings (54) are respectively arranged in the through hole and the circular groove, the inner ring of each bearing (54) is connected with the outer circumferential wall of the connecting rod (44), and the two ends of the through hole and the upper end of the circular groove are sealed through sealing rings (55).
7. A mud cake press for sewage treatment according to claim 5, wherein: a plurality of slide pins (51) are provided on the upper surface of the upper bonnet (36).
8. The mud cake press for sewage treatment as claimed in claim 1, wherein: the upper section of the valve cylinder (1) is horizontally provided with a swing rod (2), and the swing rod (2) is obliquely provided with a plurality of adjustable valve plates (33); and a primary valve core plate (34) matched with the valve cylinder (1) is arranged at the lower end of the valve cylinder, and a plurality of primary valve holes are formed in the primary valve core plate (34).
9. A mudcake press for sewage treatment according to any of the claims 1~8, wherein: a secondary pre-pressing cavity (14) communicated with the primary pre-pressing cavity (6) is further arranged in the body (7), a water pump (11) is arranged at the upper part of the secondary pre-pressing cavity (14), the liquid outlet end of the water pump (11) is communicated with the outside through an outer discharge pipe (10), a slurry pump (16) is arranged at the lower part of the secondary pre-pressing cavity (14), and the water outlet end of the slurry pump (16) is communicated with the valve barrel (1) through a return pipe (15); the middle part of the secondary pre-compaction cavity (14) is provided with a secondary valve core plate (12), and a plurality of secondary valve holes (13) are formed in the secondary valve core plate (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211408881.1A CN115557662A (en) | 2022-11-11 | 2022-11-11 | Mud cake pressing machine for sewage treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211408881.1A CN115557662A (en) | 2022-11-11 | 2022-11-11 | Mud cake pressing machine for sewage treatment |
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| CN202211408881.1A Pending CN115557662A (en) | 2022-11-11 | 2022-11-11 | Mud cake pressing machine for sewage treatment |
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