CN219922168U - Sand discharge treatment device for pretreatment cyclone sand basin of sewage treatment plant - Google Patents
Sand discharge treatment device for pretreatment cyclone sand basin of sewage treatment plant Download PDFInfo
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- CN219922168U CN219922168U CN202321274598.4U CN202321274598U CN219922168U CN 219922168 U CN219922168 U CN 219922168U CN 202321274598 U CN202321274598 U CN 202321274598U CN 219922168 U CN219922168 U CN 219922168U
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- 239000004576 sand Substances 0.000 title claims abstract description 193
- 208000028659 discharge Diseases 0.000 title claims abstract description 40
- 239000010865 sewage Substances 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000012423 maintenance Methods 0.000 claims abstract description 29
- 238000005273 aeration Methods 0.000 claims description 23
- 238000007599 discharging Methods 0.000 claims description 13
- 238000011010 flushing procedure Methods 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 abstract description 5
- 239000013049 sediment Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010027339 Menstruation irregular Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Abstract
The utility model discloses a sand discharge treatment device for a pretreatment cyclone sand basin of a sewage treatment plant, which comprises two cyclone sand basins, a manual maintenance knife gate valve, a sand-water separator, an electric control knife gate valve, a sand discharge pipe, a branch pipe control gas circuit and a Roots blower, wherein the bottoms of the two cyclone sand basins are respectively communicated with the sand-water separator through the sand discharge pipe; a manual maintenance knife gate is respectively arranged at the sand discharge openings at the bottoms of the two cyclone sand settling tanks, and an electric control knife gate which is opened and closed at fixed time through PLC programming is arranged behind the manual maintenance knife gate; the sand discharge pipe and the cyclone sand basin are communicated with the Roots blower through branch pipe control gas paths. The treatment device can truly achieve the effects of sand discharge and sand-water separation, and solves the problem that the sand discharge of the original cyclone tank is not thorough; meanwhile, not only is the manpower liberated, the full life cycle of the equipment is improved, but also the huge loss caused by direct or indirect production stoppage and production reduction is reduced.
Description
Technical Field
The utility model relates to the technical field of sewage treatment devices, in particular to a treatment device for solving the problem that a pretreatment cyclone sand basin of a sewage (water supply) treatment plant is difficult in sand discharge and improving the sand discharge effect.
Background
The prior pretreatment cyclone sand basin sand removal system of the sewage (water supply) treatment plant adopts a gas stripping sand removal mode to carry out sand removal treatment, and the equipment is long in installation service life, and the sand washing function is not considered in the design of the equipment, so that mud and sand are deposited at the bottom of the sand basin along with small garbage which is not intercepted by a fine grid. Existing sand removal equipment and description: (1) existing equipment: at present, the main equipment for sand discharge adopts a set of rotational flow device of a tin-free general factory at one stage, and the specific model is as follows: the matched motor is 2.2KW, and the rotary bearing supports the rotary blade to rotate for separating sediment; a central Kong Peitao air stripping device (the upper flange is closed, and a blower is not matched for sand stripping and sand washing); (2) The matched motor is 2.2KW, and the star-shaped balance needle speed reducer drives the rotary blade to rotate to separate sediment; because the equipment adopts the bottom temporary sand pump to carry out direct discharge at first, the later stage is changed into gas stripping and sand removal during second-stage construction, but the structure of the original civil engineering pool is not changed (such as a sand pump pit is arranged at the bottom). (3) In addition, the original sand setting tank is used for pumping sand, the bottom setting structure automatically flows to the reserved groove by the accumulated sand, and then the sand is pumped out by the pump, so that the sand pumping pump has low service life due to abrasion of sand, and meanwhile, the pumping time is required to be manually controlled for starting and stopping; and in the subsequent reconstruction and expansion, the original sand pump is directly abandoned without changing the structure concrete body structure of the original sand setting tank, and the gas extraction device is additionally used instead.
However, in the existing cyclone sand setting tank air stripping sand discharging equipment, because the sand-water separator is unreasonable to install, namely, the water inlet pipeline at the upper part of the sand-water separator is higher than the first sand discharging pipe for setting sand Chi Debu, the flow direction of the gravity flow sand is formed into two ninety degrees of continuous curves from low to high when a valve is opened to discharge sand, so that the sand in the sand setting tank is not smooth, the sand at the two tank bottoms is not thoroughly discharged, and further, the manual work and a large amount of tap water are required to be washed and discharged at regular intervals, so that the labor cost is increased, a large amount of water resources are wasted, and the site is very unclean; the pretreatment air stripping sand discharge is intermittent operation, when the sediment time of the silt is increased along with the instantaneous quantity, the sediment cannot be normally discharged until the next period, and when the pipeline is manually disassembled and then dredged and cleaned for sediment silt is needed during each fault, so that the on-site sanitation condition is poor, and the higher operation and maintenance cost is increased; meanwhile, a large amount of sediment directly enters the biochemical treatment section in the aeration stage, so that the treatment capacity of the biochemical tank is affected. In addition, the existing cyclone sand setting tank air stripping sand discharging equipment is large in sand feeding amount and needs to be manually interfered to start and stop the air stripping equipment because sand is fine particle sand, so that the sand is often accumulated to block or excessively aerated sand flows to a biochemical treatment section, the tank capacity of the biochemical treatment section is reduced, the water treatment amount is influenced, the abrasion of equipment such as a rear-end lifting pump and a reflux pump is increased, the production and use requirements of continuous and intermittent sand discharging cannot be met by the pretreatment sand setting tank, a large amount of manpower and material resources are further consumed, sand cleaning (pond cleaning) is stopped, and the loss of more than 20 tens of thousands of water is caused when the production is stopped for one day for a large water plant, and the environment-friendly risk that water discharge is not up to standard is possibly caused.
Therefore, from the aspects of equipment perfection and water quality safety, the utility model designs the sand discharge treatment device for the pretreatment cyclone sand basin of the sewage treatment plant, which does not need to manually control equipment to start and stop, adds a second sand discharge pipe hole on the original structure, adopts the principle of gravity (Venturi) by utilizing the height difference of the sand basin, combines the principle of an electric (or pneumatic) gate valve and a maintenance valve (PLC control principle) at the same time, and discharges sand sunk into a sand-water separator for treatment at random, thereby achieving the purposes of thoroughly discharging sand, saving manpower, running maintenance cost and prolonging the service life of the equipment.
Disclosure of Invention
Aiming at the technical defects, the utility model aims to provide a sand discharge treatment device for a pretreatment cyclone sand basin of a sewage treatment plant, which better solves the problem that the existing gas stripping sand discharge equipment of the cyclone sand basin is not thorough in sand discharge.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a sand discharge treatment device for a pretreatment cyclone sand basin of a sewage treatment plant, which comprises two cyclone sand basins, a manual maintenance knife gate valve, a sand-water separator, an electric control knife gate valve, a sand discharge pipe, a branch pipe control gas circuit and a Roots blower, wherein the bottoms of the two cyclone sand basins are respectively communicated with the sand-water separator through the sand discharge pipe; a manual maintenance knife gate valve is respectively arranged at the sand discharge port at the bottom of the two cyclone sand settling tanks, and an electric control knife gate valve is arranged behind the manual maintenance knife gate valve; the sand discharge pipe and the two cyclone sand settling tanks are communicated with the Roots blower through branch pipe control gas paths;
the two ends of the exhaust pipe are respectively communicated with an air flushing aeration pipe and an air stripping sand discharging pipe in sequence, the exhaust pipe is communicated with the air flushing aeration pipe to form a first control gas path, and the exhaust pipe is communicated with the air stripping sand discharging pipe to form a second control gas path; two ends of the first control gas circuit are respectively communicated with a rotational flow sand setting tank; two ends of the second control air passage are respectively communicated with the sand discharge pipe, and a second control air passage connecting port is arranged between the manual maintenance knife gate valve and the electric control knife gate valve; the electric control knife gate valve is opened and closed at fixed time through PLC programming.
Preferably, the manual maintenance knife gate valve and the electric control knife gate valve are arranged on the sand discharge pipe; the pneumatic aeration pipe and the stripping sand discharge pipe are respectively provided with a manual control ball valve and an electromagnetic valve, and the manual control ball valve and the electromagnetic valve are used for performing pneumatic aeration sand washing on the cyclone sand setting tank by fan gas through the pneumatic aeration pipe when the electric control knife gate valve is closed; the air-flushing aeration pipe and the stripping sand discharge pipe are both of DN25 type; the sand discharge pipe is of DN150 type; DN89 is selected as the exhaust pipe.
Preferably, the manual control ball valve and the electromagnetic valve are both of DN25 type.
Preferably, the sand-water separator is extended into a pool which is about 1.2 meters lower than the ground by adopting a Venturi principle and is used for replacing a Roots blower for gas stripping, and sand which is sunk into the bottom of the pool is discharged into the sand-water separator for treatment by combining an electric control knife gate valve with a manual maintenance knife gate valve in an unscheduled way through the action of gravity, so that the sand-water separation is realized, the purposes of saving labor cost and material cost are achieved, and thorough sand discharge is realized.
Preferably, the branch pipe control air path is provided with a pressure sensor for controlling the branch pipe pressure and the pressure of the pressure reducing valve on the branch pipe control air path at constant pressure; the Roots blower is provided with a rated temperature sensor, and can automatically stop and cool down when the rated temperature of the blower is exceeded, so that the blower is prevented from being damaged due to overhigh temperature, and meanwhile, a motor of the blower is prevented from being burnt by a constant voltage protection blower; the Roots blower does not need to be started under the condition of gravity flow sand discharge, and can achieve the purposes of energy conservation and consumption reduction.
Preferably, the cyclone sand setting tank adopts the existing cyclone sand setting tank structure, and the Roots blower arranged on the cyclone sand setting tank is not changed, so that the normal use of equipment is ensured, and the sand discharging effect is further ensured.
Preferably, the manual maintenance knife gate valve and the electric control knife gate valve are respectively provided with an automatic mode and a manual mode which are controlled by a program and are used for controlling and adjusting air flushing aeration and stripping sand discharge; the electric control knife gate valve can be replaced by a pneumatic control knife gate valve.
The utility model has the beneficial effects that: the automatic control cyclone sand setting tank sand discharge treatment device comprises: (1) The rotational flow sand setting tank can not have the sand which cannot be extracted any more, completely solves the problem that the sand setting tank is arranged under the condition of strict environmental protection requirement in a new period, truly achieves the effects of sand discharge and sand-water separation, and achieves the purpose of thorough sand discharge; (2) The second sand discharge pipe is improved and added on the original structure, and the sand-water separator is extended into a pool which is about 1.2 meters lower than the ground by adopting the Venturi principle, so that the production is not required to be stopped and reduced, the integral overturning reconstruction is not required, the input cost is greatly reduced, and meanwhile, the huge loss caused by direct or indirect production stopping and reducing of a sewage treatment plant is solved; (3) The PLC is configured to open the fan at regular time and start and stop the power to control the knife gate valve, so that the problem of manual on duty opening is solved, the manpower is liberated, and the full life cycle of the equipment is improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a sand discharge treatment device for a pretreatment cyclone grit chamber of a sewage treatment plant according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the structure of FIG. 1;
fig. 3 is a schematic diagram of the working principle of fig. 1.
Reference numerals illustrate:
the cyclone sand setting tank 1, the manual maintenance knife gate valve 2, the sand-water separator 3, the electric control knife gate valve 4, the air-flushing aeration pipe 5 and the air-stripping sand discharge pipe 6.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment 1, as shown in fig. 1 to 3, a sand discharge treatment device for a pretreatment cyclone sand basin of a sewage treatment plant comprises two cyclone sand basins 1, a manual overhaul knife gate valve 2, a sand-water separator 3, an electric control knife gate valve 4, a sand discharge pipe, a branch pipe control gas circuit and a Roots blower, wherein the bottoms of the two cyclone sand basins 1 are respectively communicated with the sand-water separator 3 through the sand discharge pipe; a manual overhaul knife gate valve 2 is respectively arranged at the sand discharge port at the bottom of the two cyclone sand settling tanks 1, and an electric control knife gate valve 4 is arranged behind the manual overhaul knife gate valve 2; the sand discharge pipe and the two cyclone sand settling tanks 1 are communicated with the Roots blower through branch pipe control gas paths; in this case, the electrically controlled knife gate valve 4 is provided for the purpose of automatically discharging sand water deposited at the bottom of the cyclone grit chamber into the grit-water separator 3 by gravity, while the manual maintenance knife gate valve 2 is maintained for the convenience of later inspection and maintenance.
Furthermore, the branch pipe control air path is formed by sequentially connecting an air-flushing aeration pipe 5 and an air-stripping sand discharge pipe 6 at two ends of the exhaust pipe respectively, the exhaust pipe is communicated with the air-flushing aeration pipe 5 to form a first control air path, and the exhaust pipe is communicated with the air-stripping sand discharge pipe 6 to form a second control air path; two ends of the first control gas circuit are respectively communicated with a rotational flow sand setting tank; two ends of the second control air passage are respectively communicated with the sand discharge pipe, and a second control air passage connecting port is arranged between the manual maintenance knife gate valve 2 and the electric control knife gate valve 4; the electric control knife gate valve 4 is opened and closed at regular time through PLC programming, wherein automatic control can be realized by utilizing the existing PLC control principle to start and stop equipment at regular time, and the aim of releasing manpower is achieved.
Further, in the embodiment, the manual maintenance knife gate valve 2 and the electric control knife gate valve 4 are arranged on the sand discharge pipe; the pneumatic aeration pipe 5 and the stripping sand discharge pipe 6 are respectively provided with a manual control ball valve and an electromagnetic valve, and are used for carrying out pneumatic aeration sand washing on the cyclone sand sedimentation tank 1 by fan gas through the pneumatic aeration pipe 5 (equivalent to a first control gas circuit) when the electric control knife gate valve 4 is closed; the air flushing aeration pipe 5 and the stripping sand discharging pipe 6 are all of DN25 type; the sand discharge pipe is of DN150 type; DN89 is selected as the exhaust pipe.
Furthermore, the manual control ball valve and the electromagnetic valve are all of DN25 type.
Furthermore, the sand-water separator 3 is extended into a pool which is about 1.2 meters lower than the ground by adopting a Venturi principle and is used for replacing a Roots blower for gas stripping, and sand which is sunk into the bottom of the pool is discharged into the sand-water separator for treatment in an unscheduled way by utilizing an electric control knife gate valve and a manual maintenance knife gate valve under the action of gravity, so that the sand-water separation is realized, the purposes of saving labor cost and material cost are achieved, and thorough sand discharge is realized.
Further, the branch pipe control air path is provided with a pressure sensor for controlling the pressure of the branch pipe and the pressure of the pressure reducing valve on the branch pipe control air path at constant pressure; the Roots blower is provided with a rated temperature sensor, and can automatically stop and cool down when the rated temperature of the blower is exceeded, so that the blower is prevented from being damaged due to overhigh temperature, and meanwhile, a motor of the blower is prevented from being burnt by a constant voltage protection blower; the Roots blower does not need to be started under the condition of gravity flow sand discharge, and can achieve the purposes of energy conservation and consumption reduction; it should be noted that the shut down or boost may occur when the rated set pressure is exceeded/undershot.
Furthermore, the cyclone grit chamber 1 adopts the existing cyclone grit chamber structure, and a Roots blower arranged on the cyclone grit chamber 1 is not required to be dismantled, and the construction is not required to be stopped thoroughly when the construction is implemented on the basis of not changing the original structure of the structure and not requiring file design and investment cost increase.
In addition, it should be noted that, according to actual conditions, the original Roots blower can be replaced by a new Roots blower, and the original Roots blower can be used for standby, so as to ensure normal use of the equipment and further ensure the sand discharge effect.
Further, the manual maintenance knife gate valve 2 and the electric control knife gate valve 4 are respectively provided with an automatic mode and a manual mode controlled by a program, as shown in fig. 3, and are used for controlling and adjusting air flushing aeration and stripping sand discharge; the electrically controlled knife gate 4 may be replaced by a pneumatically controlled knife gate.
Working principle: the sand and water separator is changed into a tank which is about 1.2 meters lower than the ground by utilizing the high level difference of the grit chamber and adopting the gravity (Venturi) principle, sand gathered in the grit chamber is discharged into the grit and water separator for treatment at an irregular period by utilizing an electric (or pneumatic) gate valve and a maintenance valve under the action of gravity, so that a Roots blower for stripping is completely eliminated, and the cost factors of saving manpower, material resources and the like are achieved by eliminating all equipment and energy sources; the method comprises the following steps:
(1) An electric control knife gate valve with the diameter of 150 mm is connected behind each manual ball valve with the diameter of 160 mm at the bottom of the cyclone sand basin, the valve is opened irregularly by the PLC control principle for a set time, sand water deposited at the bottom of the cyclone sand basin is automatically discharged into a sand water separator by gravity, and sand water separation is realized, so that the purpose of sand discharge is achieved;
(2) The original Roots blower is used as a standby blower, and is started when the fresh air blower is overhauled, so that the normal use of the equipment can be ensured;
(3) Continuously small-gas-amount aeration (gas flushing sand);
(4) A manual maintenance knife gate valve and an electric control knife gate valve which are connected with a DN40 first sand discharge pipe are arranged on a second sand discharge pipe of the sand basin, when the electric control knife gate valve is closed, fan gas washes sand at the bottom of the sand basin through the first sand discharge pipe, when the electric control knife gate valve is opened, the air stripping sand discharge forms a venturi effect through the first sand discharge pipe, and then the cleaned sand flows into a sand-water separator along with water flow through the second sand discharge pipe;
(5) The wastewater in the sand-water separator automatically flows into a factory domestic sewage pool through a sewage drain pipe or by using an old original sewage drain pipe;
(6) The fan is started and the electric control knife gate valve is started and closed at regular time through PLC programming, so that the sand washing and discharging time of the cyclone sand basin can be accurately controlled; the on-site electric cabinet is set into two modes of manual operation and automatic operation, and the PLC can be in communication connection with the central control room for remote operation.
When the device is used: (1) Under the condition of gravity flow sand discharge, the fan does not need to be started, so that the purposes of energy conservation and consumption reduction can be achieved; (2) Under special conditions, if the sand amount is large, the time for starting and running is set, and both the manual mode and the automatic mode are linked with the sand-water separator, so that the unattended management effect can be achieved, and the labor, material and related maintenance cost are greatly saved.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. A arrange sand processing apparatus that is used for sewage treatment plant preliminary treatment whirl sand setting pond, its characterized in that: the device comprises two cyclone sand-setting ponds, a manual maintenance knife gate valve, a sand-water separator, an electric control knife gate valve, a sand discharge pipe, a branch pipe control gas circuit and a Roots blower, wherein the bottoms of the two cyclone sand-setting ponds are respectively communicated with the sand-water separator through the sand discharge pipe; a manual maintenance knife gate valve is respectively arranged at the sand discharge port at the bottom of the two cyclone sand settling tanks, and an electric control knife gate valve is arranged behind the manual maintenance knife gate valve; the sand discharge pipe and the two cyclone sand settling tanks are communicated with the Roots blower through branch pipe control gas paths;
the two ends of the exhaust pipe are respectively communicated with an air flushing aeration pipe and an air stripping sand discharging pipe in sequence, the exhaust pipe is communicated with the air flushing aeration pipe to form a first control gas path, and the exhaust pipe is communicated with the air stripping sand discharging pipe to form a second control gas path; two ends of the first control gas circuit are respectively communicated with a rotational flow sand setting tank; two ends of the second control air passage are respectively communicated with the sand discharge pipe, and a second control air passage connecting port is arranged between the manual maintenance knife gate valve and the electric control knife gate valve; the electric control knife gate valve is opened and closed at fixed time through PLC programming.
2. The sand discharge treatment device for a pretreatment cyclone sand basin of a sewage treatment plant as claimed in claim 1, wherein: the manual maintenance knife gate valve and the electric control knife gate valve are arranged on the sand discharge pipe; the pneumatic aeration pipe and the stripping sand discharge pipe are respectively provided with a manual control ball valve and an electromagnetic valve, and are used for controlling the pneumatic aeration pipe to perform pneumatic aeration sand washing on the cyclone sand sedimentation tank; the air-flushing aeration pipe and the stripping sand discharge pipe are both of DN25 type; the sand discharge pipe is of DN150 type; DN89 is selected as the exhaust pipe.
3. A sand removal treatment device for a pretreatment cyclone grit chamber of a sewage treatment plant as claimed in claim 2, wherein: and the manual control ball valve and the electromagnetic valve are of DN25 type.
4. The sand discharge treatment device for a pretreatment cyclone sand basin of a sewage treatment plant as claimed in claim 1, wherein: the sand-water separator is extended into a pool of about 1.2 meters below the ground using venturi principles.
5. The sand discharge treatment device for a pretreatment cyclone sand basin of a sewage treatment plant as claimed in claim 1, wherein: the branch pipe control air path is provided with a pressure sensor which is used for controlling the pressure of the branch pipe and the pressure of the pressure reducing valve on the branch pipe control air path at constant pressure; the Roots blower is provided with a rated temperature sensor, and can automatically stop for cooling when the rated temperature of the blower is exceeded; the Roots blower does not need to be started under the condition of gravity flow sand discharge.
6. The sand discharge treatment device for a pretreatment cyclone sand basin of a sewage treatment plant as claimed in claim 1, wherein: the cyclone sand setting tank adopts the existing cyclone sand setting tank structure, and the Roots blower arranged on the cyclone sand setting tank is not changed.
7. The sand discharge treatment device for a pretreatment cyclone sand basin of a sewage treatment plant as claimed in claim 1, wherein: the manual maintenance knife gate valve and the electric control knife gate valve are respectively provided with an automatic mode and a manual mode which are controlled by programs; the electric control knife gate valve can be replaced by a pneumatic control knife gate valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321274598.4U CN219922168U (en) | 2023-05-24 | 2023-05-24 | Sand discharge treatment device for pretreatment cyclone sand basin of sewage treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321274598.4U CN219922168U (en) | 2023-05-24 | 2023-05-24 | Sand discharge treatment device for pretreatment cyclone sand basin of sewage treatment plant |
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| Publication Number | Publication Date |
|---|---|
| CN219922168U true CN219922168U (en) | 2023-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321274598.4U Active CN219922168U (en) | 2023-05-24 | 2023-05-24 | Sand discharge treatment device for pretreatment cyclone sand basin of sewage treatment plant |
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| Country | Link |
|---|---|
| CN (1) | CN219922168U (en) |
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2023
- 2023-05-24 CN CN202321274598.4U patent/CN219922168U/en active Active
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