CN206355661U - A cleaning and sand removal machine - Google Patents

Abstract

The utility model discloses a dirt-removing and sand-removing machine, which comprises a rotational flow grit chamber and a grid chamber; the bottom of the rotational flow grit chamber is provided with a central sand hopper, an expanded sand tank, a slag separation orifice plate, an aeration sand washing device, a sand filter tank and a filtered water tank; the sand filter tank is arranged above the filtered water tank, a filter screen is arranged in the sand filter tank, and the sand filter tank is communicated with the filtered water tank; a water lifting device is arranged in the filtered water tank, and comprises a water lifting pipe, and a water lifting air pipe is attached to the outer wall of the water lifting pipe; a cylindrical water tank is arranged at the top of the water lifting pipe; the sand basin center device is provided with a water washing sand extracting device, and the water washing sand extracting device comprises a center sand extracting pipe, a sand leaking groove and a large cylinder with an opening at the upper end; the large cylinder is connected with the cylinder water tank; a sand extracting air pipe is attached to the outer wall of the central sand extracting pipe; the sand leakage groove is arranged at the bottom of the large cylinder and communicated with the large cylinder; the top of the cyclone grit chamber is also provided with a sand-water separator. The utility model provides a structure is more reasonable, and the dirt removing and deslagging effect is better, the dirt removing and sand removing machine that the energy consumption is lower.

Description

A cleaning and sand removal machine

technical field

The utility model relates to a dirt and sand removal machine, in particular to a machine with a daily processing capacity of not less than 5,000 to 10,000 square meters installed on the outlet pipe of the lifting pump behind the coarse grid for sand removal and one-step small gap fine filtration for cleaning and cleaning. Mechanical equipment for sand and slag discharge in separate lanes. Mainly used in water supply and drainage pumping stations, urban domestic sewage treatment plants, waterworks, and industrial wastewater pretreatment stages of desanding and sewage removal equipment. It is especially suitable for pretreatment occasions where there is a lot of sand behind the coarse screen, it is more suitable for the pretreatment occasions of the membrane treatment process, and it is also suitable for the occasions where the expansion of the sewage treatment plant does not increase the civil construction.

Background technique

At present, the known pretreatment procedures and equipment for the pump lifting water after the coarse grid: the water from the lifting pump enters the concrete buffer water distribution pool through the water outlet at the upper end of the pump, and then enters the concrete fine grid pool, and the grid completes the pollution removal. The effluent water from the grid enters the cyclone grit chamber through a long concrete channel, and is desanded by the cyclone desanding system. The sand extraction equipment in the sand tank [sand suction pump, driving sand suction machine, sand discharge pipeline] is completed, and the sand-water separation is completed by the electric sand-water separator; there are gates at the front and back of the grid tank and the grit chamber for equipment maintenance; Fine grids with smaller grid gaps are generally set behind the fine grids, and cleaning water pipelines and pressure water pumps must be configured to complete the cleaning of the grids.

Although some small-scale combined mechanical equipment that does not require concrete ditches have appeared in recent years, due to consideration of external dimensions and transportation costs, the daily processing capacity of small-scale equipment is generally below 3,000 cubic meters. The problem of large size, high cost, and high transportation cost. Moreover, the water enters the fine grid first, and then the grit chamber.

The existing equipment and technology for removing dirt and sand from the hoisting pump after the coarse grid have the following defects:

Pollution interception and cleaning are done by grids, and sand removal is done by swirling grit chamber equipment [including blower, swirl grit mixer, gas, sand pipeline] or advection grit chamber sand lifting equipment [sand suction pump, driving type suction The sand machine and the sand discharge pipeline] are completed, and the sand-water separation is completed by the sand-water separation equipment;

There are steady flow ditches in the middle of the grid tank and the grit chamber, and there are gates at the front and rear for equipment maintenance;

There is a buffer and steady flow ditch at the outlet of the lift pump;

Generally, the grid gaps are more than 3 mm, and the slag with a size of 1 mm or less cannot be intercepted;

The grille is in the front, and the sand removal is in the back. The sand wears the grille filter parts, sliding sealing surface and underwater transmission components;

The daily processing capacity of a single machine of integrated machinery and equipment that realizes the separation of slag and sand for easy transportation is below 3,000 cubic meters;

The content of organic matter in the sand is high, and the sand contains slag;

The slag has a high moisture content;

The liquid level difference before and after the large-flow fine filter grid is large, the flow velocity through the grid is large, the slag is squeezed out of the grid gap, and it is difficult to remove;

When the grid blockage is serious, the hydraulic load of the grid components is large, and the cost of the grid is high;

In the case of large processing capacity, the whole pretreatment process occupies a large area, and a pool body needs to be built;

The cost of controlling multiple objects is high.

A lot of equipment, high energy consumption, high maintenance and operation costs;

When configuring large flow and small gap grilles, it is necessary to configure pressure cleaning water pumps, water pipes and accessories;

The height of the swirling grit chamber is large, and the circumference enters the circumference and exits, and the utilization rate of the volume of the tank is low;

In order to ensure stable flow and low speed in and out of the grit chamber, it is necessary to configure a larger and longer inlet and outlet pipeline;

Due to the large depth of the grit chamber and the high energy consumption of the airflow to lift the sand.

Utility model content

The purpose of the utility model is a more reasonable structure, better effect of cleaning dirt and slag, and lower energy consumption.

The technical solution adopted by the utility model to solve its technical problems is: a kind of decontamination and sand removal machine, including a swirl grit chamber, a grille pool integrated at the end of the swirl grit chamber; the swirl grit chamber A water inlet pipe is arranged tangentially in the middle of the water inlet, and a diversion baffle is arranged on the upper part. There is a central sand bucket at the bottom of the pool, and the outer ring of the central sand bucket is provided with an extended sand tank connected to it; the upper end of the central sand bucket is provided with a slag separation orifice, and an aeration and sand washing device is installed under the slag separation orifice; The bottom of the sand tank is also provided with a sand filter tank and a filtered water tank surrounding the outer ring of the extended sand tank. The expanded sand tank and the sand filter tank are arranged below the central sand bucket landslide; the sand filter tank is arranged above the filtered water tank. There are upper and lower layers of filter screens, the sand filter tank and the filtered water tank are connected through the lower filter screen; a water lifting device is installed in the filtered water tank, and the water lifting device includes a water lifting pipe, and the upper end of the water lifting pipe protrudes The lower end of the flow grit chamber is inserted into the filtered water tank, and the outer wall is attached with a water-lifting air pipe; the top of the water-lift pipe is provided with a cylindrical water tank with an upper end opening; the center of the grit chamber is equipped with a water-washing sand-lifting device, and the water-washing sand-lifting device includes a center Sand lifting pipe, sand leakage tank, large cylinder with upper opening; the water inlet of the large cylinder is connected with the water outlet of the cylindrical water tank; It is inserted into the bottom of the central sand hopper, and the outer wall is attached with a sand lifting air pipe; the sand drain tank is set at the bottom of the large cylinder and communicated with it; the top of the swirl grit chamber is also equipped with a sand water separator connected to the discharge pipe at the bottom of the sand drain tank; The drain port of the sand-water separator is connected with the filtered water tank, and the sand discharge port is connected with the sand bucket.

Further, the grid pool is provided with a baffle that divides it into two parts, the grid water inlet tank and the grid water outlet tank, and a grid cylinder is arranged in the grid water outlet tank, and the grid cylinder is provided with an air washing device adapted to it; the baffle plate A round hole matching the water inlet end of the grid cylinder is provided on the top, dense brushes are provided on the water inlet and outlet ends of the grid cylinder for sealing; a slag receiving groove adapted to it is arranged axially inside the grid cylinder, and the slag receiving The upper end of the groove is higher than the inner horizontal plane of the grid cylinder; a central shaft coaxial with the grid cylinder is arranged in the slag receiving groove, and a group of helical blades are arranged on the central shaft; the top device of the grid pool is equipped with a driving device for driving the rotation of the central shaft and the grid cylinder ; The discharge end of the slag receiving tank protrudes from the water outlet end of the grid cylinder to the outside of the grid pool; a water level adjustment device is also arranged in the grid pool.

Further, a grid outlet pool is arranged at the bottom of the grid groove, and the grid cylinder is arranged above the grid outlet pool, and an isolation plate is arranged between the two; each side of the grid cylinder is provided with a grid whose bottom communicates with the grid outlet pool. The grid overflow tank, the side of the grid overflow tank close to the grid cylinder is provided with a lifting weir plate that matches the bottom and the isolation plate; The tank is matched with the water storage tank; the grid inlet tank is equipped with a floating body for monitoring the water level in it, and the water level adjustment device is a balance-type lever structure, one end of which is suspended from the floating body, and the other end is suspended from the lifting weir plate.

In order to make the water content of the sand lower, a water filter orifice plate is installed at the bottom of the slag receiving tank, and a water receiving tank is installed on the outer wall of the grid pool below the end of the slag receiving tank. A slag receiving bucket is provided.

Further, the sand-water separator is shaped like a hydraulic inclined screen, and its upper part is provided with a water distribution tank, and the discharge pipe at the bottom of the sand leakage tank in the annular gap is connected with the water distribution tank; the sand-water separator is provided with an inclined screen, and a water receiving chamber is arranged under the inclined screen , the inclined screen is equipped with a sand net with a pore size less than 0.2, the water receiving chamber is a water receiving basin closed around, the upper end of the outlet pipe under the water receiving basin is equipped with a buoyancy open drain valve, the upper part of the inclined screen is covered, and the water receiving basin is installed An air intake pipe is arranged, and a low-resistance diaphragm check valve is connected under the drain pipe of the receiving basin to be connected with the filtered water tank.

Further, the bottom of the central sand lifting pipe is provided with a diversion cover, and the top of the large cylinder is provided with a drainage pipe connected to the water inlet pipe of the swirl grit chamber; the bottom of the water receiving tank is connected to the water inlet pipe; It communicates with the top of the filter screen on the upper layer of the sand filter tank.

Further, it also includes a blower, an air flow pipeline assembly and a PLC control box; the inclined screen cavity of the sand-water separator and the sand filter tank are located above the upper filter screen, and a trachea pipeline is arranged; the air blower passes through the air flow pipe assembly and the water lifting device, water washing Sand lifting device, aeration and sand washing device, inclined screen cavity of sand water separator, upper filter screen of sand filter tank, and pipeline connection of air washing device; air flow pipeline components are composed of multiple air pipes, solenoid valves, regulating valves, The check valve is composed of a micro-resistance diaphragm structure, and the solenoid valve is an outdoor type. The control box is connected with the driving device of blower, electromagnetic valve and grid cylinder, and the control box is an outdoor field control box with PLC module.

In order to make the filtering effect of the grid cylinder better, the filtering part of the grid cylinder is a circular hole plate filter cylinder with a filter hole diameter not less than φ1, or a filter cloth, grid plate or filter screen with smaller gaps.

Further, the sand leakage tank is an annular gap sand leakage tank, and the aeration and sand washing device is conical; the outlet pipe of the water lifting device enters the large cylinder of the water washing and sand extraction device tangentially.

Further, the height of the swirl grit chamber is 20% lower than the standard pool shape, the water inlet pipe at the water inlet end of the swirl grit chamber is connected to the outlet pipe of the lifting pump, and the water depth of the water storage tank can at least cover 80% of the grid cylinder for filtration Area; the grid tank is installed horizontally and overhead at the end of the swirl grit chamber.

Beneficial effects of the utility model: the swirl grit chamber is directly installed on the water outlet pipeline of the lifting pump, which saves investment and reduces land occupation. The overflow water from the upper end of the grit chamber can be fully utilized; the total height of the grit chamber can be reduced by more than 20% under the premise of ensuring the treatment effect and capacity, which is beneficial to reduce the cost of the grit chamber and transportation costs, and save installation space. It is integrated in the grid tank at the end of the cyclone grit chamber, so that the desanding and cleaning of the daily treatment capacity of 5,000 to 10,000 can be completed by one machine, which greatly reduces investment costs, saves construction and installation time and land occupation, and expands capacity in sewage plants There is no need to increase the land, and the social benefits are remarkable; the swirl grit chamber is set before the grid tank, so that the method of removing sand first and then cleaning can effectively avoid the wear of sand on the grid filter, dynamic sealing surface, and supporting transmission components , save grid operation and maintenance costs, reduce energy consumption, and increase grid life. The content of organic matter in the sand is extremely low and can be used as building materials. The low moisture content of slag reduces the cost of garbage transportation. The slag and sand are discharged separately to reduce the cost of subsequent separation and treatment. The grid cylinder is deeply immersed in water, the filter area is large, the flow rate is low, the force of slag embedded in the grid hole is small, and the slag is easy to unload and clean. Large-flow low-pressure air cleaning does not need to flush the pressure water source and pump pipes, which saves investment and low energy consumption; the water level adjustment device of the balance lever structure ensures that the depth of water immersion inside and outside the grille is consistent, the hydraulic pressure load of the grille is small, and the cost is low. The PLC control box ensures the long-term automatic operation of the equipment; the total kinetic energy of the water inlet is converted into potential energy, and the grid pool is installed horizontally and overhead to ensure that the final water level is higher than the center of the water inlet pipe, and the hydraulic loss of the whole machine is small.

The utility model will be described in detail below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a sectional view along line A-A of Fig. 1 .

In the figure: 1. Swirling flow grit chamber, 2. Cylinder water tank, 3. Large cylinder, 4. Sand-water separator, 5. Water level adjustment device, 6. Driving device, 7. Grid cylinder, 8. Grid tank , 9, diversion baffle, 10, overflow port, 11, central sand bucket, 12, sand filter tank, 13, water tank after filtration, 14, slag separation orifice plate, 15, aeration sand washing device, 16, expansion Sand tank, 17, blower, 18, filter screen, 19, water pipe, 20, water pipe, 21, center sand pipe, 22, sand leaking tank, 23, sand pipe, 24, grid water inlet tank, 25, grid outlet tank, 26, baffle plate, 27, slag receiving tank, 28, central shaft, 29, spiral blade, 30, grid outlet tank, 31, isolation plate, 32, grid overflow tank, 33, Lifting weir plate, 34, floating body, 35, water storage tank, 36, slag discharge pipe, 37, water receiving tank.

detailed description

Embodiment, a kind of decontamination desand removing machine as shown in Figure 1, 2, comprises swirling flow grit chamber 1, is installed in the grille pond 8 on the end of swirl grit chamber 1 grit chamber; Grille pond 8 The horizontal overhead installation is at the end of the cyclone grit chamber 1. The middle part of the water inlet end of the swirl grit chamber 1 is provided with a water inlet pipe tangentially, and the upper part is provided with a diversion baffle 9, and the end of the swirl grit chamber 1 is located above the diversion baffle 9 and the water inlet of the grid pool 8 is set. The overflow port 10 is connected; the bottom of the swirl grit chamber 1 is provided with a central sand bucket 11, and the outer ring of the central sand bucket 11 is provided with an extended sand tank 16 connected with it; bucket 11. The upper end of the central sand bucket 11 is provided with a slag separation orifice 14, and an aeration and sand washing device 15 is installed under the slag separation orifice 14; Tank 12 and filtered water tank 13, extended sand tank 16, and sand filter tank 12 are arranged below the center sand bucket 11 landslide; sand filter tank 12 is arranged on the top of filtered water tank 13, and there are upper and lower layers of filter screen Net 18, sand filter tank 12 and water tank 13 after filtering are communicated by the filter screen 18 of lower floor; Sand tank 1, the lower end of which is inserted into the filtered water tank 13, the outer wall of which is attached with a water-lifting air pipe 20; the top of the water-lifting pipe 19 is provided with a cylindrical water tank 2 with an upper end opening; The device includes a central sand lifting pipe 21, a sand leakage tank 22, and a large cylinder 3 with an open upper end; the water inlet of the large cylinder 3 is connected to the water outlet of the cylindrical water tank 2; the upper end of the central sand lifting pipe 21 protrudes from the swirl grit chamber 1 is inserted into the large cylinder 3 through the sand leakage tank 22, and the lower end is inserted into the bottom of the central sand bucket 11, and the sand lifting air pipe 23 is attached to the outer wall; the sand leakage tank 22 is arranged at the bottom of the large cylinder 3 and communicates with it; A sand-water separator 4 connected to the discharge pipe at the bottom of the sand leakage tank 22 is provided; the outlet of the sand-water separator 4 is connected to the filtered water tank 13, and the sand discharge port is connected to the sand bucket. The sand leakage tank 22 is an annular gap sand leakage tank 22, and the aeration and sand washing device 15 is conical; the outlet pipe of the water lifting device enters the large cylinder 3 of the water washing and sand extraction device tangentially.

The grid tank 8 is a horizontal rectangular tank body installed overhead, and one end opening is welded and connected with the upper section of the swirl grit chamber 1 . The grid tank 8 is provided with a baffle plate 26 that divides it into two parts, the grid water inlet tank 24 and the grid water outlet tank 25, and the grid tank 7 is arranged in the grid water outlet tank 25, and the grid cylinder 7 is provided with a Air washing device; the baffle plate 26 is provided with a round hole matching the water inlet end of the grid cylinder 7, and the water inlet end and the water outlet end of the grid cylinder 7 are provided with dense brushes for sealing; the inside of the grid cylinder 7 is axially provided with The slag receiving groove 27 adapted to it, the upper end of the slag receiving groove 27 is higher than the inner horizontal plane of the grid cylinder 7; the central axis 28 coaxial with the grid cylinder 7 is arranged in the slag receiving groove 27, and a group of helical blades 29 are arranged on the central axis 28 The top device of the grid pool 8 has a driving device 6 for driving the central shaft 28 and the grid cylinder 7 to rotate; A water level regulating device 5 is also provided inside. The filter part of the grid cylinder 7 is a circular hole plate filter cylinder with a filter hole diameter not less than φ1, or a filter cloth, grid plate or filter screen with smaller gaps. One end of the grid cylinder 7 is internally watered and externally supported on the suspended sprocket, the center is connected to the central shaft 28, and the inner circle of the other end is supported on a set of three rollers. Both ends of the rotating grid cylinder 7 are sealed with dense brushes, Prevent the slag in the grid cylinder 7 (water inlet end) from leaking to the outside of the grid cylinder 7 (water outlet); 80% of the filter area of the filter cylinder passes through the water flow at the same time, the filter area is large, the flow rate is low, the slag is squeezed, the pore force is small, and it is easy to To clean and unload the slag, the filter cartridge rotates around the horizontal central axis 28, and the slag is discharged into the central slag receiving groove 27 by the weight of the slag on the top of the water surface and the low-pressure air outside the cylinder.

A grid outlet pool 30 is arranged at the bottom of the grid groove, and the grid cylinder 7 is arranged above the grid outlet pool 30, and a separation plate 31 is arranged between the two; a bottom is provided on each side of the grid cylinder 7 to connect with the grid outlet pool 30 The grid overflow tank 32 is connected, and the side of the grid overflow tank 32 close to the grid cylinder 7 is provided with a lifting weir plate 33 whose bottom is compatible with the isolation plate 31; the isolation plate 31, the lifting weir plate 33, and the grid pool 8 The inner wall and the baffle plate 26 cooperate to form a water storage tank 35 that is compatible with the grid cylinder 7; the grid water inlet tank 24 is provided with a floating body 34 for monitoring the water level in it, and the water level adjustment device 5 is a balance-type lever structure. A floating body 34 is suspended at one end, and a lifting weir plate 33 is suspended at the other end. The height of the swirl grit chamber 1 is 20% lower than the standard pool shape, the water inlet pipe at the water inlet of the swirl grit chamber 1 is connected to the outlet pipe of the lifting pump, and the maximum water storage depth of the water storage tank 35 can at least exceed 80% of the grid cylinder Grill filter area. The grid overflow groove 32 is welded on both sides of the grid cylinder 7, and the water storage tank 35 can ensure the deep immersion of the grid cylinder 7. Lifting weir plates 33 are symmetrically distributed in one group on both sides of the grid cylinder 7, and are composed of stainless steel strips welded with reinforcing ribs, guide strips, etc., the upper center is hinged with the water level adjustment device 5 pull rods, and the two ends are installed in the guide groove with clearance. The lifting weir plate 33 is connected with a water level control device to ensure that the inside and outside of the grid cylinder 7 have a maximum immersion depth. The filter area of the grid is maximized, and the hydraulic load of the grid cylinder 7 is reduced at the same time, thereby reducing the load of the rotating bearings at both ends of the grid cylinder 7 and improving the service life.

One end of the central shaft 28 is installed on the end plate of the slag receiving tank 27 through a centripetal thrust bearing, and the inner edge of the spiral blade 29 is welded on the central shaft 28 and the outer edge is supported on the bushing. The bearings are large-clearance adjustable self-lubricating ceramic rolling bearings or MC nylon bearings. The former has lower energy consumption. Dustproof and rubber seals are installed at the bearings to prevent water from entering the slag receiving tank 27. Even if there is a small amount of leakage, it can pass through the water receiving tank 37 discharge. The driving device 6 is a water-immersed double-row chain transmission, and the double-row chain can reduce the force of the chain teeth, and the water-immersed chain transmission water lubrication reduces friction and heat. The driving device 6 drives the grid cylinder 7 and the central shaft 28 synchronously.

The bottom of the slag receiving tank 27 is provided with a water filter orifice, and the outer wall of the grid pool 8 is located at the bottom of the slag receiving tank 27. A water receiving tank 37 is arranged below the end of the slag receiving tank 27. Slag bucket.

The sand-water separator 4 is shaped like a hydraulic inclined screen, and its upper part is provided with a water distribution tank, and the discharge pipe at the bottom of the annular gap sand leakage tank 22 is connected with the water distribution tank; the sand-water separator 4 is provided with an inclined screen, and a water receiving chamber is arranged below the inclined screen , the inclined screen is equipped with a sand net with a pore size less than 0.2, the water receiving chamber is a water receiving basin closed around, the upper end of the outlet pipe under the water receiving basin is equipped with a buoyancy open drain valve, the upper part of the inclined screen is covered, and the water receiving basin is installed An air inlet pipe is arranged, and a low-resistance diaphragm type check valve is connected under the water receiving basin drain pipe to link to each other with the filtered water tank 13.

The bottom of the central sand lifting pipe 21 is provided with a deflector, and the top of the large cylinder 3 is provided with a drainage pipe connected to the water inlet pipe of the swirl grit chamber 1; the bottom of the water receiving tank 37 is connected to the water inlet pipe; The water outlet communicates with the top of the filter screen 18 on the upper layer of the sand filter tank 12 . The slag receiving tank 27, the spiral blade 29, the central shaft 28, the MC nylon bushing, the water filter orifice, the water receiving tank 37, the slag discharging pipe 34 and the like form the press machine.

This decontamination and sand removal machine also includes blower 17, air flow pipeline assembly and PLC control box; Sand water separator 4 inclined screen cavities, sand filter groove 12 are positioned at the top of upper filter screen 18 and are provided with trachea pipeline; Blower 17 passes airflow The management component is connected with the pipes of the water lifting device, the water washing sand lifting device, the aeration sand washing device 15, the inclined screen cavity of the sand water separator 4, the upper filter screen 18 of the sand filter tank 12, and the air washing device; the air flow pipeline The component consists of multiple air pipes, solenoid valves, regulating valves, and check valves. The check valve is a micro-resistance diaphragm structure, and the solenoid valve is an outdoor type. The control box is connected with the driving device 6 of the blower 17, the solenoid valve and the grid cylinder 7, and the control box is an outdoor field control box with a PLC module.

The sand filter tank 12 filters the grill water out of the cleaner filtered water and stores it in the filtered water tank 13 below. Remove the suspended solids adhering to the surface of the sand grains to achieve backwashing of the sand filter layer.

The filtered water tank 13 is a cavity for storing filtered water. The water lifting device installed in the tank regularly lifts the filtered water to the top of the cyclone grit chamber 1 and enters the sand washing and lifting tank for sand cleaning.

The slag separation orifice 14 is made of a circular stainless steel plate, reinforcing ribs, and the periphery of the steel plate is covered with round holes with a diameter of 5 mm. The hole in the center is convenient for 21 groups of sand lifting pipes to pass through. The orifice allows sand to pass through and prevents slag from falling to the sand collection. fight.

The aeration and sand washing device 15 is installed under the slag separation orifice 14. It is a small cylindrical box on the upper part connected with a conical cover structure. The circular hole uniformly distributes the regular large-flow intake air and shoots it down at high speed along the inner wall of the cone hood. After washing the sand in the sand bucket, the air flow goes up along the outer area of the cone hood to backwash the upper slag separation orifice 14 to prevent slag from clogging. Aeration and flushing of the slag above the orifice plate removes organic matter on the slag, and drives the slag deposited on the orifice plate upward to be discharged out of the cyclone grit chamber 1 with the water flow.

The expanded sand tank 16 ensures that the total volume of the sand storage bucket does not decrease when the height of the central sand bucket 11 decreases. When the central sand bucket 11 is filled with sand, the excess sand slides into the surrounding expanded sand tank 16 through the upper and lower connecting ports. When lifting sand, when the sand in the central sand bucket 11 is nearly finished, the sand in the expanded sand tank 16 slides to the central sand bucket 11 along the bottom slope. The sand lifting and aeration sand washing air flow prevents the central sand bucket 11 and the expansion sand tank 16 from hardening and clogging, so that the sand maintains fluidity.

The blower 17 is a volumetric blower 17 with a power of 2.2KW. The flow rate and pressure fully meet the grid backwashing requirements. Due to the low flow rate of the grid, many round holes are not easy to block. After testing: even if a large amount of garbage such as hair is close to the round hole plate , due to the bridging effect, it has little effect on the flow rate of the grille, unless the slag such as adhesive soil, even if the grille is completely blocked by 2/3 of the filter holes, the filter head of the grille is only 60mm, so the actual start-up time of the grille and The downtime is allocated 1:4 to fully meet the normal work, that is, the grille working time is 12 minutes per hour, which is subdivided into more than 6 working cycles, that is, each cycle starts for 2 minutes and stops for 8 minutes. The sand and water extraction can be completed simultaneously. Based on previous experience and theoretical calculations, it is enough to work for 6 minutes per hour, subdivided into two working cycles, that is, each time works for 3 minutes and stops for 27 minutes. Add aeration sand washing, sand-water separator 4 backwashing, filter sand backwashing time total hour blower 17 working hours not more than 30 minutes. Therefore the air blower 17 selected fully satisfies the air supply requirement required for the use of the whole machine.

The sand bucket is a standard environmentally friendly engineering plastic garbage bucket with rollers.

The slag receiving hopper is a standard environmental protection engineering plastic garbage hopper with rollers.

The box body of the control box is made of stainless steel, and the blower blower 17, electromagnetic valve, grid cylinder 7 drive motors are automatically operated according to the program of pre-design or on-site debugging.

working principle:

The sewage at the outlet of the lift pump enters the cyclone grit chamber 1 tangentially at a relatively high flow rate, and the water flow revolves around the circular pool wall at an initial rotational speed of about 20 revolutions per minute. The low-speed overflow of the half-circle arc section at the upper end of the pool flows into the large sloping bottom tank and merges into the grid pool 8 inlet. Most of the kinetic energy of the incoming water is converted into potential energy.

The sand with higher density in the swirling process slides to the central sand bucket 11 along the pool wall and slope, and the slag separating orifice 14 on the sand bucket blocks the rest of the slag.

The aeration and sand washing device 15 regularly blows and washes the sand particles first, and then the rising air flow reversely washes the slag separation orifice 14 to prevent clogging. The swirling flow is discharged from the swirling flow grit chamber 1.

Sand bucket height reduces than standard pond shape, but has increased outer ring ring (up and down opening middle part aperture is connected) expanded sand groove 16, and total sand bucket volume does not reduce. When the central sand bucket 11 is full of sand, the excess sand slides into the surrounding expanded sand tank 16 through the upper and lower connecting ports, and when the sand is lifted, when the sand in the central sand bucket 11 is nearly lifted, the expanded sand tank 16 is disturbed by the air flow. The sand slides to the central sand bucket 11 along the bottom slope. The sand lifting and aeration sand washing air flow regularly scours the central sand bucket 11 and the expansion sand tank 16 to prevent hardening and clogging, so that the sand maintains fluidity.

The outer ring of the extended sand tank 16 is provided with a sand filter tank 12 and a filtered water tank 13, which produces sand washing water by itself. The sand filter tank 12 is equipped with an airflow cleaning device to prevent blockage. The lifted clean water tangentially enters the large cylinder 3 of the water washing and sand extraction device, and at the same time the lifted sand water overflows from the edge of the central pipe above the cylinder, the sand passes through the swirling clean water, and the soluble organic matter is taken away by the swirling water from the sand washing The outlet pipe of the cylinder is discharged and diverted to the vicinity of the water inlet of the grit chamber, and the clean sand continues to flow downward together with the clean water at the bottom of the cylinder, and flows into the water distribution tank of the sand-water separator 4 through the tortuous annular gap channel of the sand leakage tank 22.

After washing, the sand water overflows from the 400mm wide distribution tank of the sand water separator 4 and slides downward through the arc-shaped sand net to realize the separation of sand and water. The sand enters the sand bucket, and the filtered water flows back to the clean water tank through the diaphragm check valve. . Instantaneous high-flow low-pressure air blows back the sand screen regularly to dredge the mesh and blow away the deposited fine sand. The automatic water level adjustment device 5 with balance lever structure ensures that the flow area of the grille is close to 80% of the total filtration area, and minimizes the flow rate through the grille. Barrel 7 hydraulic load. The grid cylinder 7 adopts a 1mm diameter round hole mesh plate. Because of the large filtration area and low flow rate through the grid, it is not easy to be blocked. It adopts low-pressure air washing + brush + gravity slag unloading. The screw conveying press machine rotating synchronously with the grid cylinder 7 transports and squeezes the slag horizontally and obliquely upward, and the moisture content of the slag is low. The squeezer filters the water and adds a diaphragm check valve to return to the water inlet pipe. The PLC on-site control box program controls the blower 17, the solenoid valve, and the drive motor, and the automatic operation realizes sand removal, aeration and sand washing, orifice plate backwashing, sand lifting, water lifting, sand washing, sand mesh backwashing, and sand filter layer backwashing , The grid runs regularly for flushing, sand-water separation, sand discharge, grid slag pressing and slag discharge, etc. all working cycles.

Compared with the prior art, the utility model is characterized by:

1) Reversing the traditional process sequence, sand removal is arranged in front of the grille to avoid sand wear on the grille;

2. The kinetic energy at the outlet of the lifting pump realizes the swirling flow and sedimentation, and the kinetic energy is converted into potential energy while decelerating and flowing into the grid;

3. Deep immersion grille, large filtration area, low flow rate through the grille, and small head loss before and after the grille;

4. The movable overflow weir + hydraulic automatic water level adjustment device ensures that the outside of the grid cylinder 7 is deeply immersed in water, and the hydraulic pressure load of the grid cylinder 7 is low;

5. Gravity + brush + low-pressure air slag unloading is used to clean the filter cartridge, with low energy consumption and no need to configure pressure water source and pipeline;

6. Wash sand with self-produced clear water, and the content of organic matter in the separated sand is extremely low;

7. On-site PLC automatic control realizes self-produced low-pressure air, sand settling, aeration and slag washing, sand washing, water lifting, sand lifting, sand-water separation, filtering and slag removal, and slag-water pressing and separation. Washing and regeneration of sand-water separation filter and clear water sand filter layer;

8. Clean sand removal, high efficiency of fine filtration and slag removal, and low moisture content of slag. The integrated equipment occupies a small area.

9. One machine can complete 1 to 50,000 cubic meters of sewage per day in one step, finely filter the slag, remove the sand, and separate the slag and sand.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Apparently, the specific implementation of the present invention is not limited by the above methods. As long as the various insubstantial improvements made by adopting the method concept and technical solution of the present utility model; within the scope of protection.

Claims (10)

1. A cleaning and desanding machine, characterized in that: comprise a swirl grit chamber, a grid pool installed on the end of the grit chamber; the middle part of the water inlet of the swirl grit chamber is provided with an inlet pipe tangentially, The upper part is provided with a diversion baffle, and the end of the swirl grit chamber is located above the diversion baffle to set an overflow port connected to the water inlet of the grid pool; the bottom of the swirl grit chamber is provided with a central sand bucket, and the center sand bucket The outer ring is equipped with an extended sand tank connected to it; the upper end of the central sand bucket is provided with a slag separation orifice, and an aeration sand washing device is installed under the slag separation orifice; the bottom of the swirl grit chamber is also equipped with an extended sand tank The sand filter tank and filtered water tank in the outer ring, the extended sand tank and the sand filter tank are set below the center sand bucket landslide; the sand filter tank is set above the filtered water tank, and there are upper and lower layers of filter screens inside. The sand filter tank and the filtered water tank are connected through the filter screen on the lower layer; a water lifting device is installed in the filtered water tank, and the water lifting device includes a water lifting pipe. The upper end of the water lifting pipe extends out of the swirl grit chamber, and the lower end is inserted into the filtered water tank , the outer wall is attached with a water-lifting air pipe; the top of the water-lifting pipe is provided with a cylindrical water tank with an upper end opening; the center of the grit chamber is equipped with a water-washing sand-lifting device, and the water-washing sand-lifting device includes a central sand-lifting pipe, a sand drain tank, and an open upper end. Large cylinder; the water inlet of the large cylinder is connected with the water outlet of the cylindrical water tank; the upper end of the central sand lifting pipe protrudes from the swirl grit chamber and is inserted into the large cylinder through the sand leakage tank, and the lower end is inserted into the bottom of the central sand bucket, and the outer wall is attached with a lifting Sand air pipe; the sand leakage tank is set at the bottom of the large cylinder and communicated with it; the top of the swirl grit chamber is also equipped with a sand-water separator connected to the discharge pipe at the bottom of the sand leakage tank; the outlet of the sand-water separator and the filtered water tank Connected, the sand outlet is connected to the sand bucket. 2. The decontamination and sand removal machine according to claim 1, characterized in that: the grid pool is provided with a baffle that divides it into two parts, the grid inlet tank and the grid outlet tank, and the grid outlet tank is provided with a The grid cylinder is equipped with an air flushing device adapted to it; the baffle is provided with round holes matching the water inlet end of the grid cylinder, and the water inlet and outlet ends of the grid cylinder are provided with dense brushes for sealing; A slag receiving groove adapted to it is arranged axially inside the grid cylinder, and the upper end of the slag receiving groove is higher than the inner horizontal plane of the grid cylinder; a central axis coaxial with the grid cylinder is arranged in the slag receiving groove, and a group of helical blades are arranged on the central axis; The top device of the grid pool has a driving device for driving the central shaft and the grid cylinder to rotate; the discharge end of the slag receiving tank extends from the water outlet end of the grid cylinder to the outside of the grid pool; a water level adjustment device is also installed in the grid pool. 3. The decontamination and sand removal machine according to claim 2, characterized in that: the bottom of the grid tank is provided with a grid outlet pool, the grid cylinder is arranged above the grid outlet pool, and a separation plate is arranged between the two; There is a grid overflow tank whose bottom is connected to the grid outlet pool on each side, and the side of the grid overflow tank close to the grid cylinder is equipped with a lifting weir plate whose bottom is compatible with the isolation plate; the isolation plate, lifting The combination of the weir plate, the inner wall of the grid pool and the baffle constitutes a water storage tank that is compatible with the grid cylinder; a floating body for monitoring the water level inside the grid tank is installed, and the water level adjustment device is a balance-type lever structure. The floating body is suspended, and the lifting weir plate is suspended at the other end. 4. The dirt and sand removal machine according to claim 2 or 3, characterized in that: the bottom of the slag receiving tank is provided with a water filter orifice, the outer wall of the grid pool is located below the end of the slag receiving tank and is provided with a water receiving tank, and the end of the slag receiving tank is Connect the slag discharge pipe inclined upwards, and the slag discharge pipe is connected with a slag receiving hopper. 5. The decontamination and sand removal machine according to claim 4, characterized in that: the sand-water separator is shaped like a hydraulic inclined screen, and its upper part is provided with a water distribution tank, and the discharge pipe at the bottom of the annular gap sand leakage tank is connected with the water distribution tank; There is an inclined screen inside the water separator, and a water receiving chamber is arranged under the inclined screen, and a sand screen with a hole diameter of less than 0.2 is arranged on the inclined screen. The water receiving chamber is a water receiving basin closed around the surroundings. The buoyancy open type drain valve has a cover on the upper part of the inclined screen, and the water receiving basin is equipped with an air inlet pipe. 6. The cleaning and desanding machine according to claim 5, characterized in that: the bottom of the central sand lifting pipe is provided with a diversion cover, and the top of the large cylinder is provided with a drainage pipe connected to the water inlet pipe of the swirl grit chamber; The bottom of the water receiving tank is connected with the water inlet pipe; the water outlet of the grid outlet pool is connected with the top of the filter screen on the upper layer of the sand filter tank. 7. The cleaning and desanding machine according to claim 6, characterized in that: it also includes a blower, an air flow pipeline assembly and a PLC control box; the inclined screen cavity of the sand-water separator and the sand filter tank are located above the upper filter screen Air pipes are provided; the air blower is connected to the pipes of water lifting device, water washing sand extraction device, aeration sand washing device, inclined screen cavity of sand water separator, upper filter screen of sand filter tank, and air washing device through air flow management components ;The air flow pipeline assembly is composed of multiple air pipes, solenoid valves, regulating valves, and check valves. The check valve is a micro-resistance diaphragm structure, and the solenoid valve is an outdoor type; The device is connected, and the control box is an outdoor field control box with a PLC module. 8. The decontamination and sand removal machine according to claim 2 or 3, characterized in that: the filter part of the grid cylinder is a circular hole plate filter cartridge with a filter hole diameter not less than φ1, or a filter cloth with smaller gaps, Grids, filters. 9. The cleaning and desanding machine according to claim 7, characterized in that: the sand leakage tank is an annular gap sand leakage tank, the aeration and sand washing device is conical; The large cylinder of the device. 10. The cleaning and desanding machine according to claim 1, characterized in that: the height of the swirl grit chamber is 20% lower than the standard pool shape, and the water inlet pipe at the inlet end of the swirl grit chamber is connected to the outlet pipe of the lifting pump, The water depth of the water storage tank can at least cover 80% of the filter area of the grid cylinder; the grid tank is installed horizontally and overhead at the end of the swirl grit chamber.