CN220142778U - Filter back flush buffer container - Google Patents

Abstract

A back flushing buffer container of a filter comprises a buffer barrel body, a water inlet pipe, a water outlet pipe and a diversion cone; the top of the buffering barrel body is provided with an exhaust port, a water outlet pipe is arranged at a position, close to the top, of the buffering barrel body, a water inlet pipe is communicated with the position, close to the bottom, of the buffering barrel body, and one end of the water inlet pipe, located in the buffering barrel body, is in a bending structure with a downward water outlet; a guide cone is arranged below the buffer barrel body corresponding to the water outlet of the water inlet pipe, an annular guide plate for enabling water flow to be upward is arranged at the bottom of the buffer barrel body corresponding to the outer side of the guide cone, and an annular shielding plate for enabling water flow to be downward and towards the guide cone is arranged above the annular guide plate in the buffer barrel body; the utility model greatly reduces the flow velocity of high-speed water flow generated during back flushing of the pre-filter, and effectively solves the problem of high-speed impact of two-phase flow mixing on a drain pipe ditch during back flushing of the pre-filter.

Description

Filter back flush buffer container

Technical Field

The utility model relates to the technical field of filter back flushing, in particular to a filter back flushing buffer container.

Background

In the condensate fine treatment system of the power plant, a pre-filter is arranged for filtering foreign matters and powder ferric oxide in condensate, so that the efficient operation of fine treatment mixed bed resin and the cleanliness of condensate entering a thermodynamic system are ensured; generally, after the pre-filter is subjected to fine treatment for 24 hours, the pressure difference at the inlet and the outlet of the pre-filter is increased and approaches to the designed maximum pressure difference, the pre-filter is required to be backwashed, foreign matters attached to the filter element in the pre-filter are washed away, and the cleaning and the service cycle of the filter element are ensured;

the back flushing of the prefilter generally proceeds through the steps of: in the process of back scrubbing of the compressed air of the pre-filter, as 0.6MPa compressed air enters the pre-filter, internal back flushing water is extruded to flow outwards along a drainage pipeline, the compressed air still has the pressure of about 0.2MPa in the pre-filter after being depressurized, so that the water flow rate of the drainage pipeline reaches 20.45m/s, the pipe diameter of a water drain pipe orifice is 200mm, the water drain flow rate reaches 2311.2m3/h, extremely high instantaneous flow rate and instantaneous flow rate can be generated, the high-speed water flow can impact a water drain pipe ditch and a collecting tank in a unit factory building, a large amount of water is caused to wash outwards, peripheral equipment facilities and personnel are sprayed, and serious equipment facility damage and personal hazard are caused;

chinese patent (publication number: CN 212143602U) discloses a cleaning wastewater buffer device for a mold, comprising a buffer tank, a water inlet pipe provided on the buffer tank, and a buffer device for reducing the flow rate of wastewater; the buffering device comprises a rotating rod, a plurality of resistance plates arranged in the middle of the rotating rod and a helical blade arranged at the lower middle of the rotating rod, and the flow rate of water can be reduced through the arrangement of the buffering device.

Disclosure of Invention

In order to overcome the defects in the background technology, the utility model discloses a back flushing buffer container of a filter.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:

a back flushing buffer container of a filter comprises a buffer barrel body, a water inlet pipe, a water outlet pipe and a diversion cone; the top of the buffering barrel body is provided with an exhaust port, a water outlet pipe is arranged at a position, close to the top, of the buffering barrel body, a water inlet pipe is communicated with the position, close to the bottom, of the buffering barrel body, and one end of the water inlet pipe, located in the buffering barrel body, is in a bending structure with a downward water outlet; the buffer barrel body is internally provided with an annular guide plate which is used for enabling water flow to be upward, and the buffer barrel body is internally provided with an annular shielding plate which is used for enabling water flow to be downward and towards the guide cone.

Preferably, a plate type impact-resistant plate is arranged in the buffer barrel body between the corresponding annular flow-shielding plate and the water outlet pipe, and a gap is reserved between one side of the plate type impact-resistant plate and the inner wall of the buffer barrel body.

Preferably, a self-flowing water outlet is arranged in the buffer barrel body between the corresponding annular flow shielding plate and the plate-type anti-flushing plate, and the pipe diameter of the self-flowing water outlet is smaller than that of the water outlet pipe.

Preferably, a net type impact-resistant plate is arranged in the buffer barrel body below the corresponding exhaust port, and the net type impact-resistant plate is positioned above the water outlet pipe.

Preferably, the net type impact-resistant plates are multi-layered, and meshes of two adjacent net type impact-resistant plates are staggered.

Preferably, a filter screen is arranged in the exhaust port.

Due to the adoption of the technical scheme, the utility model has the following beneficial effects:

the filter back flushing buffer container disclosed by the utility model has a simple structure; the high-speed water flow entering the buffer barrel body is firstly subjected to first water flow deceleration under the damping action of water storage in the buffer barrel body; then the high-speed water flow sequentially passes through the guiding function of the guide cone, the annular guide plate and the annular shielding plate to form opposite impact with the water flow guided by the guide cone, so that the high kinetic energy of the high-speed water flow is eliminated, the second water flow speed reduction is formed, the kinetic energy of most of the high-speed water flow is eliminated after the two water flow speed reduction, the flow speed of the high-speed water flow is greatly reduced, and the problem that the two-phase flow is mixed and impacted to a water drain pipe ditch during back flushing of the pre-filter is effectively solved;

in addition, be equipped with board-like dash board in the buffering staving between corresponding annular shielding flow board and the outlet pipe, the remaining kinetic energy of high-speed water flow after twice speed reduction can strike board-like dash board, offset the remaining kinetic energy of high-speed water flow through board-like dash board, form the third speed reduction, further promoted high-speed water flow buffering deceleration effect.

Drawings

FIG. 1 is a schematic view of a first construction of the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of the present utility model;

fig. 3 is a top view of the inside of the buffer tub.

In the figure: 1. buffering the barrel body; 2. a water inlet pipe; 3. a water outlet pipe; 4. a diversion cone; 5. an exhaust port; 6. an annular flow shield; 7. plate-type impact-resistant plate; 8. a net type impact plate; 9. a gravity flow water outlet; 10. a filter screen; 11. an annular deflector.

Description of the embodiments

The present utility model will be explained in detail by the following examples, and the purpose of the present utility model is to protect all technical improvements within the scope of the present utility model, and in the description of the present utility model, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., only correspond to the drawings of the present utility model, and in order to facilitate description of the present utility model, it is not necessary to indicate or imply that the apparatus or element referred to has a specific orientation.

In a first embodiment, referring to fig. 1, a backwash buffer container of a filter includes a buffer barrel, a water inlet pipe, a water outlet pipe and a diversion cone; the top of the buffer barrel body is provided with an exhaust port for exhausting air of the buffer barrel body; a water outlet pipe is arranged at the position, close to the top, of the buffer barrel body and used for discharging water of the buffer barrel body, a water inlet pipe is communicated with the position, close to the bottom, of the buffer barrel body, and the water inlet pipe is positioned at one end of the buffer barrel body and is in a bending structure with a water outlet facing downwards, and high-speed water flow enters the buffer barrel body through the water inlet pipe; a guide cone is arranged below the buffer barrel body corresponding to the water outlet of the water inlet pipe, an annular guide plate for enabling water flow to be upward is arranged at the bottom of the buffer barrel body corresponding to the outer side of the guide cone, and an annular shielding plate for enabling water flow to be downward and towards the guide cone is arranged above the annular guide plate in the buffer barrel body;

when the pre-filter is back washed, a certain amount of water is stored in the buffer barrel body, the water storage amount is higher than the water outlet of the water inlet pipe, high-speed water flow enters the buffer barrel body through the water inlet pipe, is guided by the bending structure of the water inlet pipe, is sprayed downwards, and is subjected to first water flow deceleration under the damping action of the water stored in the buffer barrel body; then the high-speed water flow sequentially passes through the guide function of the guide cone, the annular guide plate and the annular shielding plate to form opposite impact with the water flow guided by the guide cone, so that the high kinetic energy of the high-speed water flow is eliminated, the second water flow is reduced, the kinetic energy of most of the high-speed water flow is eliminated after the two times of water flow reduction, the flow speed of the high-speed water flow is greatly reduced, the gas in the water-gas two-phase flow is separated, the gas is discharged from the gas outlet, and the gas is slowly discharged from the water outlet pipe when the water level in the buffer barrel reaches the pipe orifice of the water outlet pipe, so that the problem of the mixed high-speed impact of the two-phase flow in the back flushing process of the pre-filter is effectively solved.

In the second embodiment, referring to fig. 1 to 3, a backwash buffer container of a filter is different from the first embodiment in that, on the basis of the first embodiment, a plate-type anti-impact plate is arranged between the corresponding annular flow shielding plate and the water outlet pipe in the buffer barrel, a gap is reserved between one side of the plate-type anti-impact plate and the inner wall of the buffer barrel, and the residual kinetic energy after the high-speed water flow is decelerated twice can impact the plate-type anti-impact plate, and counteracts the residual kinetic energy of the high-speed water flow through the plate-type anti-impact plate to form a third deceleration, so that the buffer and deceleration effects of the high-speed water flow are further ensured, and relatively stable water flow is formed in the buffer barrel;

in addition, the self-flowing water outlet is arranged between the corresponding annular shielding plate and the plate type anti-flushing plate in the buffer barrel body, the pipe diameter of the self-flowing water outlet is smaller than that of the water outlet, namely, the water level in the buffer barrel body rises faster in the back flushing stage of the pre-filter, most of water is discharged from the water outlet, water in the buffer barrel body between the water outlet and the self-flowing water outlet is discharged from the self-flowing water outlet after the back flushing of the pre-filter is finished, a certain water level can be reserved in the buffer barrel body, the back flushing of the pre-filter is carried out for the first time of water flow damping speed reduction, and meanwhile, excessive reserved water in the buffer barrel body is avoided.

In a third embodiment, referring to fig. 1 to 3, in a backwash buffer container of a filter, on the basis of the first or second embodiment, a mesh type anti-impact plate is arranged below a corresponding air outlet in the buffer barrel, and is positioned above a water outlet pipe, so that the mesh type anti-impact plate can effectively block splashing water generated in the buffer barrel due to impact; the net-type impact-resistant plates are multi-layered, and meshes of two adjacent net-type impact-resistant plates are staggered, so that the blocking effect on splashing water flow is further improved;

in addition, be equipped with the filter screen in the gas vent, can prevent that the foreign matter from getting into in the buffering staving from the gas vent.

The utility model has not been described in detail in the prior art, and it is apparent to those skilled in the art that the utility model is not limited to the details of the above-described exemplary embodiments, but that the utility model can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and range of equivalency are intended to be embraced therein.

Claims (6)

1. A filter back flush buffer container is characterized in that: comprises a buffer barrel body (1), a water inlet pipe (2), a water outlet pipe (3) and a diversion cone (4); the top of the buffer barrel body (1) is provided with an exhaust port (5), a water outlet pipe (3) is arranged at a position, close to the top, of the buffer barrel body (1), a water inlet pipe (2) is communicated at a position, close to the bottom, of the buffer barrel body, and one end, located in the buffer barrel body (1), of the water inlet pipe (2) is of a bending structure with a downward water outlet; the lower part of the buffer barrel body (1) corresponding to the water outlet of the water inlet pipe (2) is provided with a flow guide cone (4), the outer side of the inner bottom of the buffer barrel body (1) corresponding to the flow guide cone (4) is provided with an annular flow guide plate (11) for enabling water flow to be upward, and the upper part of the buffer barrel body (1) corresponding to the annular flow guide plate (11) is provided with an annular flow shielding plate (6) for enabling water flow to be downward and towards the flow guide cone (4).

2. The filter backwash buffer container of claim 1 wherein: a plate type anti-impact plate (7) is arranged between the corresponding annular flow shielding plate (6) and the water outlet pipe (3) in the buffer barrel body (1), and a gap is reserved between one side of the plate type anti-impact plate (7) and the inner wall of the buffer barrel body (1).

3. The filter backwash buffer container of claim 2 wherein: and a self-flow water outlet (9) is arranged between the corresponding annular flow shielding plate (6) and the plate-type anti-flushing plate (7) in the buffer barrel body (1), and the pipe diameter of the self-flow water outlet (9) is smaller than that of the water outlet pipe (3).

4. The filter backwash buffer container of claim 1 wherein: the buffer barrel body (1) is internally provided with a net type impact-resistant plate (8) corresponding to the lower part of the exhaust port (5), and the net type impact-resistant plate (8) is positioned above the water outlet pipe (3).

5. The filter backwash buffer container of claim 4 wherein: the net type impact-resistant plates (8) are multi-layered, and meshes of two adjacent layers of net type impact-resistant plates (8) are staggered.

6. The filter backwash buffer container of claim 1 wherein: a filter screen (10) is arranged in the exhaust port (5).