CN107213678B

CN107213678B - Auxiliary gas flushing system of filter tank of water works

Info

Publication number: CN107213678B
Application number: CN201710595436.3A
Authority: CN
Inventors: 张磊; 李礼; 顾军农; 张春雷; 李玉仙; 王敏; 刘永康
Original assignee: Technical Research Institute Of Beijing Water Supply Group Co ltd
Current assignee: Technical Research Institute Of Beijing Water Supply Group Co ltd
Priority date: 2017-07-20
Filing date: 2017-07-20
Publication date: 2023-09-01
Anticipated expiration: 2037-07-20
Also published as: CN107213678A

Abstract

The invention discloses an auxiliary gas flushing system of a filter tank of a tap water plant, which comprises a lifting device, a carrier gas device and an aeration device, wherein the lifting device is fixedly connected with the carrier gas device; the carrier gas device conveys exogenous gas into the filter tank; the aeration device transmits the exogenous gas conveyed by the carrier gas device to each part of the filter bed. The auxiliary back flushing system can be lifted at will, the part of the filter tank, which is easy to be mud, is cleaned in a targeted way, impurities attached to the surface of the filter material are scrubbed by utilizing the vibration of air bubbles to suspend the impurities in water, and then the impurities are discharged out of the filter tank by being matched with water back flushing. The filter material layer is thoroughly cleaned, the dirt interception capability of the filter layer is completely recovered, the filter water quality of the filter is improved, the working period of the filter is prolonged, and the water yield is improved.

Description

Auxiliary gas flushing system of filter tank of water works

Technical Field

The invention relates to the technical field of water treatment, relates to a washing device for washing, and in particular relates to a back flushing device for washing a filter tank.

Background

The filter tank is an important structure in the filtering process of a water works, and the key of stable and efficient operation of the filter tank is regeneration of the filtering capacity of the filter layer. The filter tank is subjected to a filtering period, a large amount of sludge and other impurities are trapped in the filter layer, particularly at the upper part of the filter layer, the filter layer is subjected to periodic back flushing, and the impurities are flushed cleanly and are recovered to a state before filtering, so that the filtering can be continuously carried out. The quality of flushing can directly affect the quality of filtered water, flushing period and service life.

The back flushing of the filter tank is an operation process of back flushing the filter layer for recovering the normal operation of the filter tank. After the filter works for a period of time, the water quality is rapidly deteriorated due to the penetration of the trapped pollutants through the filter layer, or the filtering resistance of the filter layer is increased to exceed the maximum allowable resistance, and the filter layer needs to be washed by reverse water flow (from bottom to top), so that the filter layer is regenerated, and the filter resumes normal operation. At present, the filter flushing method mainly comprises the following 3 steps: 1) Back flushing the high-speed water flow; 2) Back flushing with air and water; 3) The surface is assisted to flush with high-speed water flow for back flushing.

The high-speed water back flushing is to flush the filter layer by using the reverse water flow with a larger flow speed, so that the whole filter layer reaches a fluidization state and has a certain expansion degree. Dirt trapped in the filter layer falls off from the surface of the filter material under the dual actions of water flow shearing force and collision friction of filter material particles, and is then carried out of the filter tank by flushing water. The flushing effect is dependent on the flushing flow rate. However, the flow rate of water is too high or too low during the flushing process, and the flushing effect is reduced. Although the high-speed water flow back flushing operation is convenient, the pool and the equipment are simpler, the flushing water consumption is large, and after the flushing is finished, the upper thin and the lower thick layering of the filter material are obvious. If the back flushing water head of the siphon filter tank is determined by the height difference between the water level of the water collecting tank and the water level of the flushing water draining tank, the required flushing water is from the filtering water of the other grid filters in the group, so that the total filtering water quantity of the other grid filters must meet the requirement of the flushing strength of the grid filters, the flushing strength is influenced by the filtering water quantity of the other grid filters, and the flushing effect is unstable.

The air and water back flushing method is to scrub the dirt adhered to the surface of the filter material with the vibration of the air bubbles to suspend the dirt in water and then to discharge the dirt out of the pond. Because bubbles can effectively break dirt on the surface of the filter material and fall off, the water flushing strength can be reduced, and the low-speed recoil can be adopted. The air and water back flushing operation modes include the following steps: a) Firstly, air backflushing is carried out, and then water backflushing is carried out; b) Firstly, gas-water is used for backflushing simultaneously, and then water is used for backflushing; c) Air is used for backflushing firstly, then air-water is used for backflushing simultaneously, and finally water is used for backflushing (or rinsing) finally. Although the air and water back flushing method can improve the flushing effect and save the flushing water, the filter layer does not need to be expanded or only slightly expanded during flushing, and the filter layer does not generate or obviously generates the phenomenon of layering from top to bottom after flushing, namely the original filter layer structure is maintained, so that the dirt-containing capacity of the filter layer is improved, but air flushing equipment (an air blower or an air compressor and an air storage tank) is needed to be added for air and water back flushing, and the pool structure and flushing operation are also complicated. If the air flushing link is not designed at the beginning of the design of the existing filter tank, the engineering quantity for air flushing reconstruction is large in the later stage, the whole structure is required to be greatly modified, the implementation is difficult, and the reconstruction investment is high.

The surface flushing-assisting high-speed water flow back flushing method is to add a surface water flushing-assisting device above the surface of the filter bed, to perform surface flushing assisting after back flushing, to flush the surface of the filter bed by using high-speed water flow, and to complete flushing step together by matching with high-speed water flow back flushing. The cleaning range of the surface water flushing-assisting mode is limited, and the coverage surface of the flushing radius depends on the arrangement density of flushing filter heads, so that the dead angle is cleaned; the cleaning depth is limited, and the flushing can only be carried out on the surface filter material of the filter bed; if the operation mode is improper, the filter head is often blocked, and the surface flushing effect is lost.

In summary, the three flushing modes have the highest efficiency of back flushing by air and water, and are ideal back flushing modes. For a part of the filter tanks in use, an air flushing link (such as a siphon filter tank and the like) is not designed at the beginning of design and construction, if air-water backflushing is to be realized, an air flushing pipe is required to be paved under a filter plate according to the design requirement, so that the filter material of the filter tank is emptied, the existing filter plate is dismantled, an air distribution system and an air flushing pipeline are rearranged under the filter plate, and the original hole filter plate cannot realize uniform air distribution, so that a long handle filter head is required to be additionally arranged for the filter plate for uniformly distributing air, the original hole filter plate is replaced by a water distribution mode of the filter plate and the long handle filter head, the filter tank is greatly changed in structure, the realization of engineering quantity is difficult, and the transformation cost is high.

If the siphon filter tank of the water works is not provided with an air flushing device, surface flushing and high-speed water back flushing are adopted in the back flushing process, the back flushing effect depends on the filtering water quantity of the filter tank, the original surface flushing device has dead cleaning angles and insufficient cleaning depth, the back flushing expansion rate is insufficient when the filtering water quantity of the filter tank fluctuates, the filter material filtering bed is not thoroughly cleaned, the dirt interception capability of the filter bed cannot be thoroughly recovered, the mud content of the filter layer is higher, the head loss of the filter tank is faster, the filtering period is shortened, the back flushing is frequent or the mud interception hardening occurs on the surface layer of the filter bed, and even the filter tank cannot be normally used, so that the domestic water of residents is influenced; if the air flushing device is added, the air flushing device is paved at the bottom of the air flushing device at the beginning of design and construction, and the engineering quantity is large.

Aiming at the technical defects existing in the existing filter tank flushing link, the invention carries out technical innovation on flushing means, and makes up the technical defect that a single high-speed water flushing mode depends on flushing flow rate; greatly simplifies the structural great change when the existing filter tank (in use) is transformed into a gas-water backflushing mode; the technical defects of limited cleaning capacity and easy blockage of the surface flushing-assisting mode are overcome.

The flushing area of the air flushing device is positioned above the filter plate, and can be lifted at will aiming at the part (40 cm from the surface layer of the filter bed to the filter material) of the filter material of the filter tank, which is easy to be mud, and the flushing part can be selected in a targeted manner. After the water flushing is started, the filter bed starts to expand, the air flushing device descends to start auxiliary air flushing, the air flushing is finished after the air flushing is lifted before the water flushing is finished, and the air flushing pipe is not blocked. The air flushing device is added to the traditional filter tank in a mode of minimum modification amount, the construction of the filter tank main body is not needed, and the air flushing device is independently processed and installed on site.

Disclosure of Invention

Aiming at the technical defects existing in the existing back flushing link of the filter tank, the invention provides an auxiliary back flushing system of the filter tank, which aims at the important cleaning of the part easy to be mud-formed part of the filter material of the filter tank, and the important cleaning of the part difficult to clean is realized by purposefully selecting the cleaning part, so that the filter tank is thoroughly cleaned, the dirt interception capability of the filter layer is recovered, the filtering capability of the filter material is recovered completely, the filtering water quality of the filter tank is improved, the working period of the filter material of the filter tank is prolonged, and the water yield is improved.

In order to achieve the purpose of the invention, the invention provides an auxiliary gas flushing system of a filter tank of a water works, which comprises a lifting device, a carrier gas device and an aeration device, wherein the lifting device is fixedly connected with the carrier gas device, the aeration device is fixedly arranged at the lower part of the carrier gas device, and the lifting device is used for lowering or lifting the carrier gas device, stretching the carrier gas device into a filter bed of the filter tank or lifting the carrier gas device from the filter bed of the filter tank; the carrier gas device is used for conveying exogenous gas into the filter bed of the filter tank; the aeration device is used for carrying the exogenous gas conveyed by the carrier gas device to all parts of the filter bed through aeration, so that pollutants on the filter material fall off under the action of the exogenous gas, and the purpose of cleaning the filter material is achieved.

The filtering material filter is selected from a siphon filter, a common fast filter and other single water flow back flushing filters, and further preferably from the siphon filter and the common fast filter.

Wherein, elevating gear selects the lead screw lift.

In particular, the screw rod lifter is selected from a spiral screw rod lifter, a worm wheel screw rod lifter and a worm wheel and worm rod lifter.

The lifting device comprises a supporting frame, a spiral screw and a wheel disc, wherein the spiral screw vertically penetrates through the supporting frame; the wheel disc is fixedly arranged on the spiral screw rod and is positioned at the upper part of the supporting frame.

In particular, the support frame is in a flat plate shape and is detachably arranged at the upper part of the filter tank.

In particular, the support frame is arranged along the length direction or the width direction of the filter tank.

In particular, the support frame is detachably fixed in the middle of the outer wall of the filter tank. The support frame is arranged at the middle position of the filter tank in the length direction or the width direction.

The spiral screw rod vertically penetrates through the supporting frame from the center of the supporting frame.

In particular, the bottom end of the spiral screw rod is fixedly connected with the carrier gas device.

In particular, the lifting device can be manually and automatically lifted.

The lifting device in the invention can be any lifting device which can be lifted up and down, such as a screw lifting device, a worm gear lifting device and the like.

Wherein the aeration device consists of a plurality of aeration pipes.

The carrier gas device comprises a spring gas pipe, a carrier gas main pipe and a plurality of carrier gas branch pipes, wherein one end of the carrier gas main pipe is connected with the spring gas pipe, and the other end of the carrier gas main pipe is closed; and a plurality of carrier gas branch pipes are arranged at the lower part of the carrier gas manifold along the length direction of the carrier gas manifold.

The spring air pipe, the carrier gas main pipe and the carrier gas branch pipe are mutually communicated to form an air source circulation channel.

In particular, the spring air pipe is arranged from top to bottom along the depth direction of the filter tank and extends along the depth direction of the filter tank.

In particular, the spring air tube extends from top to bottom along the filter wall and is adjacent to the filter wall.

In particular, one end of the spring air pipe is connected with an external air source, and the other end of the spring air pipe is connected with a carrier air main pipe.

The length direction of the filter tank is called as the longitudinal direction; the width direction is referred to as the transverse direction; the depth direction is referred to as the vertical direction.

In particular, the carrier gas manifold is longitudinally arranged, namely carrier gas branch pipes are arranged along the length direction of the filter tank, and the length of the carrier gas branch pipes is matched with the length of the filter tank.

In particular, the upper part of the carrier gas main pipe is fixedly connected with the lower end of the spiral screw rod of the lifting device, so that the carrier gas main pipe ascends or descends along with the lifting of the spiral screw rod.

Particularly, the middle position of the upper part of the carrier gas main pipe is fixedly connected with the lower end of the spiral screw rod of the lifting device, so that the carrier gas main pipe ascends or descends along with the lifting of the spiral screw rod, namely, the position of the lower end of the spiral screw rod fixedly connected with the upper part of the carrier gas main pipe is positioned in the middle of the upper part of the carrier gas main pipe.

In particular, a plurality of carrier gas branch pipes separated from each other are provided at a lower portion thereof along a length direction of the carrier gas manifold.

In particular, the interval distance between two adjacent carrier gas branch pipes is adapted to the width of the water distribution tank of the filter tank.

In particular, the interval distance between two adjacent carrier gas branch pipes is larger than the width of the water distribution groove of the filter tank.

When the auxiliary gas flushing system descends into the filter material of the filter tank, the carrier gas branch pipes are arranged at intervals with the water distribution grooves of the filter tank, and the water distribution grooves are positioned at the middle positions of two adjacent carrier gas branch pipes; and 1 carrier gas branch pipe is respectively arranged between the water distribution groove close to the transverse tank wall of the filter tank (namely the width direction of the filter tank) and the transverse tank wall, and the carrier gas branch pipe is arranged at the middle position of the water distribution groove close to the tank wall of the filter tank and the tank wall.

Particularly, when the auxiliary gas flushing system is used for flushing, the carrier gas device is sunk into the filter bed of the filter tank, the carrier gas branch pipes are arranged at intervals with the water distribution grooves of the filter tank, the water distribution grooves are positioned at the middle positions of two adjacent carrier gas branch pipes, and one water distribution groove of the filter tank is arranged between the two adjacent carrier gas branch pipes at intervals.

In particular, the carrier gas branch pipes are provided at a lower portion of the carrier gas manifold in a longitudinal direction of the carrier gas manifold.

In particular, the number of the carrier gas branch pipes is +1 of the number of the water distribution grooves in the filter tank, namely, if the number of the water distribution grooves in the filter tank is 3, the number of the carrier gas branch pipes is 4; if the number of the water distribution grooves is 6, the number of the carrier gas branch pipes is 7, and the number of the carrier gas branch pipes is similar.

Particularly, the carrier gas branch pipe close to the wall of the filter tank is arranged at the middle position of the space between the water distribution groove close to the wall of the filter tank and the wall of the filter tank.

The carrier gas branch pipe is in an inverted T shape and comprises a vertical part, a horizontal part and an aeration pipe connecting part, wherein the vertical part is connected with the carrier gas main pipe, and the horizontal part is positioned at the lower end of the vertical part, fixedly connected with the vertical part and mutually perpendicular; the aeration pipe connecting parts are positioned at two ends of the horizontal part and extend downwards to be parallel to each other, and at least 1 fixing piece is respectively arranged on one side opposite to the aeration pipe connecting parts and used for fixing and installing the aeration pipe; and the two opposite fixing pieces are positioned in the same horizontal plane.

In particular, the vertical part, the horizontal part and the aeration pipe connecting part are in the same plane, and the inside is communicated.

In particular, the plane formed by the vertical part, the horizontal part and the aeration pipe connecting part is parallel to the plane formed by the transverse direction and the vertical direction of the filter tank.

Particularly, when the auxiliary gas flushing system descends into the filter material of the filter tank, the vertical parts of the carrier gas branch pipes are arranged at intervals with the water distribution grooves of the filter tank, and the water distribution grooves are positioned at the middle positions of the vertical parts of two adjacent carrier gas branch pipes; the vertical part of the carrier gas branch pipe close to the transverse tank wall of the filter tank is arranged at the middle position of the water distribution groove close to the transverse tank wall of the filter tank and the transverse tank wall.

Particularly, when the auxiliary gas flushing system is used for flushing, the carrier gas device is sunk into the filter bed of the filter tank, the vertical parts of the carrier gas branch pipes are arranged at intervals with the water distribution grooves of the filter tank, and the water distribution grooves are positioned in the middle of the vertical parts of two adjacent carrier gas branch pipes.

In particular, a water distribution groove is arranged between the vertical parts of two adjacent carrier gas branch pipes, and the water distribution groove is positioned at the middle position of the vertical parts of the two adjacent carrier gas branch pipes.

In particular, the vertical part of the carrier gas branch pipe close to the wall of the filter tank is arranged at the middle position of the interval between the water distribution groove close to the wall of the filter tank and the wall of the filter tank.

In particular, the vertical part extends along the depth direction of the filter tank, extends from top to bottom, is fixedly connected with the carrier gas main pipe at the upper end and is communicated with the interior of the carrier gas main pipe, and introduces the exogenous gas in the carrier gas main pipe downwards into the horizontal part at the lower end of the horizontal part; the horizontal part transversely extends, and the middle position of the upper part of the horizontal part is fixedly connected and communicated with the vertical part, namely, the vertical part of each carrier gas branch pipe is fixedly connected to the symmetrical center of the horizontal part.

The height of the vertical part of the carrier gas branch pipe is larger than the sum of the height of the water distribution groove, the height of the bottom of the water distribution groove from the surface of the filter material layer and the cleaning depth of the filter bed; the length of the horizontal part is adapted to the width of the filter tank.

In particular, the height of the vertical part of the carrier gas branch pipe is (the sum of the height of the water distribution groove, the height of the water distribution groove bottom from the surface of the filter material layer and the cleaning depth of the filter bed) + (5-10 cm), namely the sum of the height of the water distribution groove, the height of the water distribution groove bottom from the surface of the filter material layer and the cleaning depth of the filter bed is added with 5-10cm.

In particular, the filter bed cleaning depth is 35% -65% of the filter bed height.

In particular, the cleaning depth of the filter bed is 30-50cm from the surface layer of the filter bed of the filter tank to the position below the surface layer; for example, the depth of the filter bed is 80cm, and the depth of the filter bed to be cleaned is 30-50cm below the surface layer of the filter bed.

In particular, the aeration pipe connecting parts are arranged at two ends of the horizontal part and are bent downwards, and a certain distance is reserved between the aeration pipe connecting parts.

In particular, the spacing between the elbows of each carrier gas branch pipe at the two ends of the horizontal part is matched with the length of the aeration pipe.

In particular, the aeration pipe is fixedly connected with the two aeration pipe connecting parts of the carrier gas branch pipe to form a complete carrier gas closed loop.

In particular, the number of the aeration pipes is consistent with the number of the carrier gas branch pipes of the carrier gas device.

Particularly, the carrier gas branch pipe is in an inverted T shape and comprises a vertical part, a horizontal part and an aeration pipe connecting part, wherein the vertical part is connected with the carrier gas main pipe, and the horizontal part is positioned at the lower end of the vertical part, fixedly connected with the vertical part and mutually perpendicular; the aeration pipe connecting parts are positioned at two ends of the horizontal part and extend downwards to be parallel to each other, and a plurality of fixing pieces are respectively arranged on one side opposite to the aeration pipe connecting parts and used for fixing and installing the aeration pipe; and the two opposite fixing pieces are positioned in the same horizontal plane.

Wherein the vertical part, the horizontal part and the aeration pipe connecting part are in the same plane, and the inside is communicated.

In particular, the fixing members are respectively provided on opposite sides of the connection portion of the aeration tube, and generally at least 2 or more than 2 fixing members are provided.

The carrier gas device comprises a spring gas pipe, a carrier gas main pipe and a plurality of groups of carrier gas branch pipe assemblies, wherein one end of the carrier gas main pipe is connected with the spring gas pipe, and the other end of the carrier gas main pipe is closed; and a plurality of groups of carrier gas branch pipe assemblies are arranged at the lower part of the carrier gas manifold along the length direction of the carrier gas manifold, and each group of carrier gas branch pipe assemblies consists of at least 1 carrier gas branch pipe.

In particular, the interval distance between two adjacent groups of carrier gas branch pipe components is matched with the width of the water distribution groove of the filter tank.

In particular, the interval distance between two adjacent groups of carrier gas branch pipe components is larger than the width of the water distribution groove of the filter tank.

When the auxiliary gas flushing system descends into the filter material of the filter tank to perform gas flushing, the carrier gas branch pipe component groups are arranged at intervals with the water distribution grooves of the filter tank, and the water distribution grooves are positioned in the middle positions of the two adjacent carrier gas branch pipe components. And 1 group of carrier gas branch pipe assemblies are respectively arranged between the water distribution groove close to the transverse tank wall of the filter tank and the transverse tank wall, and the carrier gas branch pipe assemblies are uniformly arranged at positions close to the position between the water distribution groove close to the transverse tank wall of the filter tank and the transverse tank wall.

Particularly, when the auxiliary gas flushing system is used for flushing, the carrier gas device is sunk into the filter bed of the filter tank, the carrier gas branch pipe assemblies are arranged at intervals with the water distribution grooves of the filter tank, the water distribution grooves are positioned at the middle positions of two adjacent groups of carrier gas branch pipe assemblies, and one water distribution groove of the filter tank is arranged between the two adjacent groups of carrier gas branch pipe assemblies at intervals.

Wherein, a group of carrier gas branch pipe components close to the transverse tank wall of the filter tank comprises 1 carrier gas branch pipe; the carrier gas branch pipe component far away from the transverse tank wall of the filter tank comprises at least 2 carrier gas branch pipes.

In particular, the carrier gas branch pipe assembly between two adjacent water distribution grooves comprises at least 2 carrier gas branch pipes.

In particular, the carrier gas branch pipes of the carrier gas branch pipe assembly between two adjacent water distribution grooves are uniformly distributed at the position between the two adjacent water distribution grooves.

In particular, the number of the carrier gas branch pipe components is +1 of the number of the water distribution grooves in the filter tank, namely, if the number of the water distribution grooves in the filter tank is 3, the number of the carrier gas branch pipe components is 4; if the number of the water distribution grooves is 6, the number of the carrier gas branch pipe components is 7, and the number of the carrier gas branch pipe components is similar.

In particular, a plurality of carrier gas branch pipes of the carrier gas branch pipe assembly arranged between two adjacent water distribution grooves are uniformly distributed in the position between the two adjacent water distribution grooves.

The invention further provides an auxiliary gas flushing system of a filtering pond of a water works, which comprises a carrier gas device, an aeration device and a plurality of lifting devices which are arranged in parallel, wherein the lifting devices are fixedly connected with the carrier gas device, the aeration device is fixedly arranged at the lower part of the carrier gas device, and the lifting devices are used for lowering or lifting the carrier gas device, extending the carrier gas device into a filter bed of the filtering pond or lifting the carrier gas device from the filter bed of the filtering pond; the carrier gas device is used for conveying exogenous gas into the filter bed of the filter tank; the aeration device is used for distributing the exogenous gas conveyed by the carrier gas device to all parts of the filter bed of the filter tank, so that pollutants on filter materials of the filter tank fall off under the action of the exogenous gas, and the purpose of cleaning the filter materials is achieved.

The lifting devices are uniformly arranged on the carrier gas device and fixedly connected with the carrier gas device; the plurality of lifting devices is at least 2 lifting devices.

In particular, each lifting device comprises a supporting frame, a spiral screw and a wheel disc, wherein the spiral screw vertically penetrates through the supporting frame; the wheel disc is fixedly arranged on the spiral screw rod and is positioned at the upper part of the supporting frame.

In particular, the supporting frame of the lifting device is detachably fixed on the outer wall of the filter along the length or width direction of the filter.

In particular, the points of the bottom ends of the plurality of screw rods of the lifting devices fixedly connected with the carrier gas device are uniformly distributed on the carrier gas device.

In particular, the points of the bottom ends of the plurality of screw rods of the lifting devices and the carrier gas manifold of the carrier gas device, which are fixedly connected, are uniformly distributed on the upper part of the carrier gas manifold of the carrier gas device.

The carrier gas device comprises a spring air pipe, a carrier gas main pipe and a carrier gas branch pipe which are sequentially connected, and the insides of the spring air pipe, the carrier gas main pipe and the carrier gas branch pipe are mutually communicated to form an air source circulation channel.

In particular, the upper end of the spring air pipe is connected with an external air source, and the lower end of the spring air pipe is connected with a carrier gas main pipe.

In particular, one end of the carrier gas main pipe is fixedly connected with the spring air pipe, and the other end of the carrier gas main pipe is closed.

In particular, one end of the spring air pipe is connected with an external air source, and the other end of the spring air pipe is communicated with the other end of the carrier air manifold with one closed end.

In particular, the carrier gas manifold is arranged along the length direction of the filter tank, and the length of the carrier gas manifold is matched with the length of the filter tank.

Particularly, the upper part of the carrier gas main pipe is fixedly connected with the bottom ends of the plurality of screw screws of the plurality of lifting devices, and the fixed connection sites are uniformly distributed on the upper part of the carrier gas main pipe.

The lower ends of the plurality of spiral screw rods of the lifting device are fixedly connected with the carrier gas main pipe, so that the carrier gas main pipe ascends or descends along with the lifting of the spiral screw rods, namely, the sites fixedly connected with the lower ends of the spiral screw rods of the plurality of lifting devices and the upper parts of the carrier gas main pipe are uniformly distributed on the upper parts of the carrier gas main pipe, and the stability of the auxiliary flushing device in the use process is improved.

And a plurality of carrier gas branch pipes which are separated from each other are arranged at the lower part of the carrier gas main pipe along the length direction of the carrier gas main pipe.

The auxiliary gas flushing system of the invention adds a gas flushing link on the basis of single water back flushing for the filter tank, selectively carries out targeted auxiliary gas flushing on the part of the filter bed which is most easy to accumulate mud (namely, the part of the filter bed below the surface layer to 40cm has the maximum mud content of the filter material), scrubs dirt attached to the surface of the filter material by utilizing air bubble vibration to suspend in water, and then is matched with water flushing to be discharged out of the tank. Because bubbles can effectively crush dirt on the surface of the filter material and fall off, the water flushing strength can be reduced, and the defect of insufficient single water flushing strength is effectively overcome.

The technical means adopted by the invention comprises the following steps: the lifting process of the air flushing device can be realized (manual and automatic design); the design of the shallow air flushing device (compared with the existing air distribution system of the air-water back flushing device which is positioned at the bottom of the filter material of the filter bed, the air is deeply carried out from the bottom of the filter bed in the air-water back flushing process); the expansion and contraction of the air channel are synchronous with the lifting process of the device.

Compared with the prior art, the auxiliary flushing device has the following advantages:

1. the flushing site of the auxiliary gas flushing system is positioned above the filter plate, and is used for cleaning a part which is easy to be formed with mud (namely, a position where mud is easy to accumulate, usually about 40cm below the surface layer from the surface layer of the filter bed), and the gas flushing and the water flushing are combined to thoroughly clean the filter material.

After the auxiliary gas flushing system of the filter tank is combined with water flushing treatment, the mud content of the filter material of the filter tank is very low and is almost 0, the cleaning effect does not depend on the water flushing strength, and the purpose of recovering the dirt interception capability of the filter material through a back flushing step is realized. The auxiliary gas flushing system is not adopted to only flush water, the recovery degree of the mud content of the filter material depends on the flushing strength, and when the flushing strength is unstable (for example, when the water quantity processed by the filter tank fluctuates), the recovery effect of the filter material is not ideal, and the mud content is still more than 30%.

2. Compared with the traditional air and water back flushing mode below the filter plate, the auxiliary air flushing system has the advantages that the air consumption is low, the same cleaning effect is achieved, the consumed air amount is low, the air consumption and the cost are saved, and the aeration amount of the air flushing site above the filter plate of the filter is smaller than that of the aeration mode below the filter plate due to the fact that the air flushing site is positioned above the filter plate of the filter; in addition, aiming at the existing filter material filter tank without the air flushing system, the air flushing system is not required to be added at the bottom of the filter material filter tank for air flushing, and the air flushing system is used for back flushing, so that the flushing effect of adding the air flushing system for improvement can be achieved, and the air consumption can be saved.

3. The auxiliary air flushing system can be lifted at will along the depth direction of the filter tank, the flushing position can be selected in a targeted manner, the air flushing position is more targeted and flexible, and the parts which are difficult to clean in the water washing process are cleaned in a key manner.

4. After the auxiliary air flushing system is used for flushing water, the filter bed begins to expand, the auxiliary air flushing system is lowered into the filter tank, the auxiliary air flushing system is lifted before the water flushing is finished, the air flushing is finished, dirt trapped by filter materials in the filter layer is removed, and the filter tank is enabled to recover the filtering capability.

5. The auxiliary air flushing system is only used singly, and an air flushing device is added for the improvement of the filtering tank which is in use and not designed with an air flushing link, so that the filter material dirt-intercepting capability is quickly recovered, the engineering improvement amount is small, and the production cost is saved.

6. The auxiliary flushing device has less air consumption, lower air flushing strength than the traditional air flushing mode and cost saving. The auxiliary lifting type flushing device is positioned at a position 30-50cm below the filter material layer, and compared with the traditional air distribution mode below the filter plate (the air flushing needs to pass through the supporting layer, the filter head and the complete filter material layer at the moment), the auxiliary lifting type flushing device has small resistance to overcome and small required flushing strength.

The existing filter with air and water backwashing is characterized in that an air flushing device is arranged at the lower part of a filter plate of a filter bed of the filter, the equipment design and installation cost is high, the air quantity used in the air flushing process is large, the tap water production cost is high, the air flushing device can be moved at will, and an air flushing site is arranged at the upper part of the filter plate of the filter bed in the air flushing process, so that the air consumption is low.

7. The device adds an air flushing link for the filter tank, gets rid of the dependence on the water flushing strength, and can be widely popularized in the filter tank reconstruction (such as a siphon filter tank) which has no constant-flow water flushing pump and only depends on a flushing water head to determine the recoil strength.

Drawings

FIG. 1 is a top view of an auxiliary backwash system of example 1 of the present invention positioned in a filter tank;

FIG. 2 is a front view of the auxiliary backwash system of the present invention according to example 1 placed in the filter tank and extending into the filter material (the water distribution tank of the filter tank is not shown);

FIG. 3 is a side view of the auxiliary backwash system of example 1 of the present invention positioned in a filter tank and extending into filter media;

FIG. 4 is a schematic diagram of a carrier gas apparatus of an auxiliary backwash system according to embodiment 1 of the present invention;

FIG. 5 is a side view of the auxiliary backwash system of example 1 of the present invention positioned in a filter tank without extending into the filter media;

FIG. 6 is a schematic diagram of a carrier gas apparatus of an auxiliary backwash system according to embodiment 2 of the present invention;

FIG. 7 is a top view of the auxiliary backwash system of example 3 of the present invention positioned in a filter tank;

FIG. 8 is a side view of the auxiliary backwash system of example 3 of the present invention positioned in a filter tank and extending into filter media;

FIG. 9 is a top view of the auxiliary backwash system of example 4 of the present invention positioned in a filter tank;

FIG. 10 is a side view of an auxiliary backwash system of example 4 of the present invention positioned in a filter tank and extending into filter media. Description of the reference numerals

1. A lifting device; 11. a support frame; 12. a spiral screw rod; 13. a wheel disc; 2. a carrier gas device; 21. a spring air tube; 22. a carrier gas manifold; 23. a carrier gas manifold; 231. a vertical portion; 232. a horizontal portion; 233. an aeration pipe connecting part; 234. a fixing member; 3. an aeration device; 31. an aeration pipe; 4. a filter tank; 5. a water distribution tank.

Detailed Description

The beneficial effects of the present invention are further described below by means of specific embodiments, which are only exemplary and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that the details and forms of the technical solution of the present invention may be modified or replaced without departing from the structural spirit and scope of the present invention, but these modifications and substitutions fall within the scope of the present invention.

As shown in fig. 1, 2 and 3, the auxiliary flushing device for filtering materials of filtering materials and filtering tanks of water works of the invention comprises: lifting device 1, carrier gas device 2 and aeration equipment 3, wherein:

lifting device 1: the device is used for lifting or lowering the carrier gas device, descending the carrier gas device and placing the carrier gas device into the filter material of the filter tank or lifting the carrier gas device from the filter material of the filter tank after the back flushing is finished, and removing the carrier gas device from the water purifying filter tank;

The carrier gas device 2 is used for conveying the exogenous gas for flushing the filter tank into the filter material of the filter tank;

the aeration device 3 is used for distributing the exogenous gas conveyed by the carrier gas device to all parts of the filter material of the filter tank, so that pollutants on the filter material of the filter tank fall off under the action of the exogenous gas, and the purpose of cleaning the filter material is achieved; wherein:

the lifting device is fixedly connected with the carrier gas device (such as threaded connection, welding, riveting and the like, and the fixed connection modes known in the prior art are applicable to the invention), and the aeration device is fixedly arranged at the lower part of the carrier gas device.

The lifting device 1 is a screw rod lifting device and comprises a supporting frame 11, a screw rod 12 and a wheel disc 13, wherein the screw rod vertically penetrates through the center of the supporting frame, and the bottom end of the screw rod is fixedly connected with a carrier gas device; the wheel disc is fixedly arranged on the screw rod and is positioned on the upper part of the supporting frame, and the screw rod vertically penetrating through the supporting frame moves up and down by rotating the wheel disc, so that the carrier gas device is driven to move up and down.

The support frame is in a flat plate shape, is made of stainless steel materials, and is detachably arranged on the upper part of the filter tank 4. When in use, the support frame is fixed on the edge of the top of the filter tank, usually the support frame is fixed on the edge of the top of the filter tank by bolts, and the support frame is removed after back flushing is finished.

The wheel disc is sleeved on the screw rod, penetrates through the screw rod and is positioned at the upper part of the supporting frame, the wheel disc is rotated, and the screw rod ascends or descends along with the rotation of the wheel disc to drive the carrier gas device and the aeration device to ascend or descend.

The lifting device in the embodiment of the invention selects a screw lifting device, such as a trapezoidal screw lifting device, a spiral screw lifting device, a worm gear screw lifting device, a screw lifting device and the like, which are applicable to the invention. The lifting device of the invention is applicable to the invention except for a screw rod lifter, and other lifting devices capable of lifting and lowering objects in the field, such as worm gear lifting equipment and the like, are also applicable to the invention. .

As shown in fig. 4, the carrier gas device 2 comprises a spring gas pipe 21, a carrier gas main pipe 22 and a carrier gas branch pipe 23 which are sequentially connected and communicated with each other, wherein the spring gas pipe is connected with an external gas source (not shown in the drawing) to introduce an external gas into the auxiliary gas flushing system of the present invention.

The spring air pipe is used for connecting an external air source and the carrier gas main pipe. Besides the functions of connection and air guide, the device mainly uses the elasticity and the expansion function, has elasticity, freely expands or compresses in the ascending and descending processes of the device, and does not influence the air guide function of the carrier gas device. The air flushing device moves up and down, the air pipe is bound to move up and down, the purpose can be achieved by the telescopic function of the spring air pipe, and the air guide is not affected and the space is not additionally occupied when the spring air pipe stretches.

The spring air pipe is arranged along the depth direction of the filter tank, extends from top to bottom along the depth direction of the filter tank, the upper end of the spring air pipe is connected with an external air source, and the lower end of the spring air pipe is connected with a carrier gas main pipe; typically, the spring air tube is positioned adjacent to the wall of the filter tank, as shown in FIGS. 1 and 3.

One end of the carrier gas main pipe is fixedly connected with the spring air pipe, and the other end is closed; the carrier gas manifold is arranged in a manner of extending along the length of the filter tank (namely, longitudinally) and is positioned at the middle position in the transverse direction of the filter tank, and the length of the carrier gas manifold is matched with the length of the filter tank. The middle position of the upper part of the carrier gas main pipe is fixedly connected with the lower end of the spiral screw rod of the lifting device.

The carrier gas main pipe and the carrier gas branch pipe are made of stainless steel materials. The spiral screw rod of the lifting device and the carrier gas main pipe are usually fixedly connected into a whole through welding, bolt connection and other connection modes. So that the carrier gas device and the aeration device are suspended in the inner space of the filter tank, and the aeration device is moved up and down to any depth position of filter material (not shown in the drawing) of the filter tank by operating a wheel disc of the lifting device.

The lower part of the carrier gas manifold is provided with a plurality of carrier gas branch pipes which extend downwards along the depth direction of the filter tank and are spaced from each other, the spacing distance between two adjacent carrier gas branch pipes is matched with the width of the water distribution groove of the filter tank, and is generally larger than the width of the water distribution groove of the filter tank, namely, when the auxiliary gas flushing system descends into the filter material of the filter tank to flush gas, the carrier gas branch pipes are arranged at intervals with the water distribution groove 5 of the filter tank (as shown in figures 1 and 3), and the water distribution groove is positioned in the middle position of the two adjacent carrier gas branch pipes, namely, 2 carrier gas branch pipes are arranged between the two adjacent water distribution grooves; a water distribution groove is arranged between two adjacent carrier gas branch pipes.

A carrier gas branch pipe is arranged between the tank wall in the width direction of the filter tank and the water distribution tank close to the tank wall in the width direction of the filter tank, namely, carrier gas branch pipes are respectively arranged between the water distribution tank close to the tank wall at two sides in the width direction of the filter tank and the tank wall in the width direction, and the carrier gas branch pipes are positioned at the middle positions of the water distribution tank close to the tank wall of the filter tank and the tank wall.

As shown in fig. 2, 3 and 4, the carrier gas branch pipe is in an inverted T shape (e.g) Consists of a vertical part 231, a horizontal part 232 and an aeration pipe connecting part 233, and the vertical part, the horizontal part and the aeration pipe connecting part of the same carrier gas branch pipe are positioned in the same plane. The vertical part is connected with the carrier gas main pipe, is vertical to the carrier gas main pipe and extends along the depth direction of the filter tank; the horizontal part is positioned at the lower end of the vertical part, is fixedly connected with the vertical part and is mutually vertical, and extends along the width direction of the filter tank, namely, extends along the transverse direction of the filter tank; the horizontal part is vertical to the carrier gas main pipe, namely, the horizontal part is parallel to the width direction of the filter tank and is vertical to the length direction of the filter tank; the aeration pipe connecting portion is located at both ends of the horizontal portion and is integrally connected with the horizontal portion, the aeration pipe connecting portion extends downward along the depth direction of the filter tank, and 1 fixing piece 234 is respectively arranged on one side opposite to the two aeration pipe connecting portions, and the two opposite fixing pieces are located in the same horizontal plane and used for fixing and installing the aeration pipes, as shown in fig. 4.

The vertical part extends along the depth direction of the filter tank, extends from top to bottom, is fixedly connected with the carrier gas main pipe at the upper end and is communicated with the inside of the carrier gas main pipe, and introduces the exogenous gas in the carrier gas main pipe downwards into the horizontal part at the lower end of the horizontal part. The height of the vertical part of the carrier gas branch pipe is larger than the sum of the height of the water distribution groove of the filter tank, the height of the water distribution groove bottom from the surface of the filter material layer and the cleaning depth of the filter bed, and is usually (the sum of the height of the water distribution groove, the height of the water distribution groove bottom from the surface of the filter material layer and the cleaning depth of the filter bed) + (5-10 cm), and the cleaning depth of the filter bed is 30-50cm from the surface layer of the filter bed of the filter tank to the position below the surface layer;

the cleaning depth of the filter bed of the invention is usually 35-65% of the height of the filter material of the filter tank.

The horizontal part extends along the width direction of the filter tank, and the middle position of the upper part of the horizontal part is fixedly connected with the vertical part and communicated with the inside; the length of the horizontal part is adapted to the width of the filter tank. The plane formed by the horizontal part and the vertical part is parallel to the plane formed by the width and depth directions of the filter tank; perpendicular to the plane formed by the width and length directions of the filter tank.

The aeration pipe connecting parts arranged at the two ends of the horizontal part extend downwards along the depth direction of the filter tank, and the inside of the aeration pipe connecting parts is communicated with the horizontal part. 1 fixing piece 234 is respectively arranged on one side opposite to the connecting parts of the two parallel aeration pipes to form 1 pair of fixing pieces for fixing the aeration pipes, and the aeration pipes are fixed and installed; and the two opposite fixing pieces are positioned in the same horizontal plane. The two opposite fixing pieces of the aeration pipe connecting part in the same horizontal plane are separated by a certain distance, and the distance is matched with the length of the aeration pipe. The plane formed by the horizontal part and the aeration pipe connecting part is parallel to the plane formed by the width direction and the depth direction of the filter tank; perpendicular to the plane formed by the width direction and the length direction of the filter tank.

The aeration device is composed of a plurality of aeration pipes 31, and each aeration pipe is arranged along the width direction of the filter tank, namely, is parallel to the transverse direction of the filter tank. The aeration pipe is fixedly connected with the aeration pipe connecting part of the carrier gas branch pipe.

The number of the aeration pipes fixedly arranged on the aeration pipe connecting part of the carrier gas branch pipe is consistent with that of the carrier gas branch pipes of the carrier gas device. The aeration pipe is fixedly connected with the connecting parts of the two aeration pipes of the carrier gas branch pipe to form a complete carrier gas closed loop, exogenous gas is conveyed into the filter tank, aeration is carried out through the aeration pipes, a large number of bubbles enable dirt on the surface of the filter material to be broken and fall off, and the dirt attached to the filter material is washed down to clean the filter material.

The fixing piece of the aeration pipe connecting part is in threaded connection with the aeration pipe, so that the aeration pipe can be conveniently detached from the carrier gas branch pipe.

The working principle of the auxiliary gas flushing system is as follows:

after the siphon filter without the air flushing device filters for a period of time, the back flushing is needed, when the filtering is stopped, the supporting frame of the lifting device is placed at the middle position of the length direction of the filter and along the width direction of the filter, then the supporting frame is fixed at the outer side of the wall of the filter in a bolt fixing mode at the outer side of the wall of the filter in the length direction of the filter, the garment back flushing device is slowly placed in the filter by rotating the wheel disc, and the auxiliary back flushing device is installed and fixed at the upper part of the filter, as shown in figure 5.

When the filtering liquid level in the filter tank is reduced and reaches the backwashing standard, the independent water backwashing treatment is carried out, backwash wastewater flows out through a drainage tank, the filter material layer begins to expand after the water backwashing is formed, meanwhile, an air source is started, exogenous gas is sequentially conveyed to each aeration pipe of the aeration device through a spring air pipe, a carrier air main pipe and a carrier air branch pipe of the carrier air device, the aeration pipe begins to be aerated, a lifting device is started after the aeration pipe is aerated, a wheel disc is rotated, a spiral screw rod descends to drive the carrier air device to descend and sink into water until the aeration pipe is sunk into the cleaning depth position (namely a preset position is shown in fig. 2 and 3), the preset position of the aeration pipe extending into the filter material is usually selected to stop descending at a position which is 30-50cm away from the surface depth of the filter bed when the filter bed is stationary, and the gas and water are simultaneously washed for 3-6 min.

The preset position is the position of the filter material layer which needs to be added with air for flushing, and is usually 35-65% of the height of the filter bed, preferably 30-50cm downwards from the surface of the filter bed,

after the air flushing (3-6 min) is finished, the lifting device is started again, the wheel disc is reversely rotated, the spiral screw rod is lifted to drive the carrier gas device to lift, the carrier gas device is separated from the filter material layer, the aeration pipe is lifted to a position flush with the upper edge of the water discharge groove of the filter tank (as shown in figure 5), then the air source is closed, and the aeration is stopped. And (5) after the air flushing link is finished, continuing to flush with water alone (4-7 min). After the water flushing is finished, the whole flushing process is finished, and the next filtering is started.

Example 1

The auxiliary gas flushing system comprises 1 lifting device, and 1 fixing piece is arranged on one side of the carrier gas branch pipe opposite to the aeration pipe connecting part, as shown in figures 1, 2, 3 and 4.

Example 2

The auxiliary gas flushing system comprises 1 lifting device and 3 fixing pieces (as shown in figure 6) respectively arranged on the opposite sides of the aeration pipe connecting parts of the carrier gas branch pipe.

The aeration pipe connecting parts of the carrier gas branch pipes are arranged at two ends of the horizontal part and extend downwards along the depth direction of the filter tank, and the inside of the carrier gas branch pipes are communicated with the horizontal part. 3 fixing pieces 234 are respectively arranged on opposite sides of the connecting parts of the two parallel aeration pipes and are sequentially arranged from top to bottom to form 3 pairs of fixing pieces for fixing the aeration pipes, and the aeration pipes are fixed and installed; and the two opposite fixing pieces are positioned in the same horizontal plane. The two opposite fixing pieces of the aeration pipe connecting part in the same horizontal plane are separated by a certain distance, and the distance is matched with the length of the aeration pipe. The plane formed by the horizontal part and the aeration pipe connecting part is parallel to the plane formed by the width direction and the depth direction of the filter tank; perpendicular to the plane formed by the width direction and the length direction of the filter tank.

The aeration device consists of a plurality of aeration pipes 31, the aeration pipes are arranged between two opposite fixing pieces (usually in threaded fixed connection) positioned in the same horizontal plane, the two aeration pipe connecting parts of the aeration pipes and the carrier gas branch pipe are fixedly connected to form a complete carrier gas closed loop, exogenous gas is conveyed into the filter tank, aeration is carried out through the aeration pipes, a large number of bubbles enable dirt on the surface of the filter material to be broken and fall off, the dirt attached to the filter material is washed down, and the filter material is cleaned.

The fixing piece is connected with the aeration pipe through threads, so that the aeration pipe is convenient to detach from the carrier gas branch pipe.

The aeration pipe connecting parts arranged at the two ends of the horizontal part of the carrier gas branch pipe extend downwards along the depth direction of the filter tank, and a plurality of fixing parts are respectively arranged on the opposite sides of the two aeration pipe connecting parts which are parallel to each other from top to bottom in sequence to fix and install the aeration pipes. The aeration pipe is arranged along the width direction of the filter tank and is parallel to the transverse direction of the filter tank.

The procedure was the same as in example 1 except that the aeration tube connection of the carrier gas branch tube was different from that of example 1.

In the embodiment of the present invention, the description is given by taking the example that 3 fixing members are respectively disposed on the opposite sides of the aeration pipe connecting portion of the carrier gas branch pipe, and a plurality of fixing members, for example, 2, 4, 5, etc., may be respectively disposed on the opposite sides of the aeration pipe connecting portion of the carrier gas branch pipe.

Example 3

The auxiliary gas flushing system comprises 3 lifting devices which are arranged in parallel, and 1 fixing piece is arranged on one side of the carrier gas branch pipe, which is opposite to the connecting part of the aeration pipe, as shown in figures 7 and 8.

As shown in fig. 7 and 8, the auxiliary gas flushing system comprises 3 lifting devices, wherein each lifting device comprises a supporting frame, a spiral screw and a wheel disc, and the spiral screw vertically penetrates through the supporting frame; the wheel disc is fixedly arranged on the spiral screw rod and is positioned at the upper part of the supporting frame. The 3 screw rods of the 3 lifting devices are fixedly connected with the upper part of the carrier gas main pipe, and the fixed connection sites are uniformly distributed on the upper part of the carrier gas main pipe, as shown in figures 7 and 8.

The procedure was the same as in example 1 except that the number of lifters and the location of the fixed connection of the spiral screws of the lifters to the carrier manifold were different from example 1.

The lifting device can be provided with a plurality of lifting devices, 1 lifting device or more than 1 lifting device is suitable for the invention, and the fixed connection sites of the screw rods of the lifting device and the carrier gas manifold are uniformly distributed on the upper part of the carrier gas manifold. For example, 2 lifting devices, wherein the fixed connection sites of the 2 spiral screws of the 2 lifting devices and the carrier gas main pipe are uniformly distributed at the upper part of the carrier gas main pipe; if the number of the lifting devices is 4, the fixed connection sites of the 4 spiral screws of the 4 lifting devices and the carrier gas main pipe are uniformly distributed on the upper part of the carrier gas main pipe.

In this embodiment, a plurality of fixing members may be respectively disposed on opposite sides of the connection portions of the aeration pipes of the carrier gas branch pipe, for fixing and mounting a plurality of aeration pipes.

Example 4

The auxiliary gas flushing system comprises 1 lifting device and a carrier gas device, wherein the carrier gas device consists of a spring gas pipe, a carrier gas main pipe and a plurality of groups of carrier gas branch pipe components, and the interval distance between two adjacent groups of carrier gas branch pipe components is adapted to the width of a water distribution tank of the filter tank. 1 group of carrier gas branch pipe components are respectively arranged between the water distribution groove close to the transverse tank wall of the filter tank and the transverse tank wall, and each group of carrier gas branch pipe components close to the transverse tank wall of the filter tank comprises 1 carrier gas branch pipe; the carrier gas branch pipe component far away from the transverse tank wall of the filter tank comprises 2 carrier gas branch pipes; on the opposite side of the aeration tube connection of each carrier gas manifold, 1 fixing member is provided, as shown in fig. 9 and 10.

As shown in fig. 9 and 10, a plurality of groups of carrier gas branch pipe assemblies which extend downwards along the depth direction of the filter tank and are spaced from each other are arranged at the lower part of the carrier gas manifold, the spacing distance between two adjacent groups of carrier gas branch pipe assemblies is larger than the width of the water distribution tank of the filter tank, and each group of carrier gas branch pipe assemblies comprises at least 1 carrier gas branch pipe.

When the auxiliary gas flushing system descends into the filter material of the filter tank to perform gas flushing, each group of carrier gas branch pipe components are arranged at intervals with the water distribution grooves 5 of the filter tank (as shown in figures 9 and 10), and the water distribution grooves are positioned at the middle positions of two adjacent groups of carrier gas branch pipe components, namely, 1 group of carrier gas branch pipe components are arranged between the two adjacent water distribution grooves; a water distribution groove is arranged between two adjacent groups of carrier gas branch pipe components.

A group of carrier gas branch pipe components are arranged between the tank wall in the width direction of the filter tank and the water distribution tank close to the tank wall in the width direction of the filter tank, namely, carrier gas branch pipe components are respectively arranged between the water distribution tank close to the tank wall at two sides in the width direction of the filter tank and the tank wall in the width direction, and the carrier gas branch pipe components are positioned at the middle positions of the water distribution tank close to the tank wall of the filter tank and the tank wall.

In this embodiment, the 1-group carrier gas branch pipe assembly between the wall of the filter tank and the water distribution groove near the wall of the filter tank comprises 1 carrier gas branch pipe; each group of carrier gas branch pipe assemblies positioned between two adjacent water distribution grooves comprises 2 carrier gas branch pipes, as shown in fig. 9 and 10. The 1 group of carrier gas branch pipe components positioned between the wall of the filter tank and the water distribution groove near the wall of the filter tank can also contain more than 1 carrier gas branch pipe; each group of carrier gas branch pipe components between two adjacent water distribution grooves can contain more than 2 carrier gas branch pipes; the number of carrier gas branch pipe assemblies positioned between the filter tank wall and the water distribution groove close to the filter tank wall and the number of carrier gas branch pipes contained in each group of carrier gas branch pipe assemblies positioned between two adjacent water distribution grooves can be the same or different.

In the embodiment of the invention, each group of carrier gas branch pipe components arranged between two adjacent water distribution grooves consists of 2 carrier gas branch pipes, and one group of carrier gas branch pipe components between the transverse tank wall and the water distribution groove close to the transverse tank wall consists of 1 carrier gas branch pipe.

In the invention, each group of carrier gas branch pipe components arranged between two adjacent water distribution grooves consists of 2 carrier gas branch pipes, and more than 2 carrier gas branch pipes are also suitable for the invention; the group of carrier gas branch pipe components between the tank wall and the water distribution tank near the tank wall consists of 1 carrier gas branch pipe, and more than 1 carrier gas branch pipe is also suitable for the invention.

The rest was the same as in example 1, except that the carrier gas apparatus was different from example 1.

In this embodiment, the lifting device may further be provided with a plurality of lifting devices parallel to each other, and the positions of the contact screw rods of the lifting devices fixedly connected with the carrier gas manifold are uniformly distributed on the upper portion of the carrier gas manifold.

Claims

1. The auxiliary gas flushing system of the filtering pond of the water works comprises a lifting device, a carrier gas device and an aeration device, and is characterized in that the lifting device is fixedly connected with the carrier gas device, the aeration device is fixedly arranged at the lower part of the carrier gas device, wherein the lifting device is used for lifting or lowering the carrier gas device, and the carrier gas device extends into a filter bed of the filtering pond or is lifted from the filter bed of the filtering pond; the carrier gas device is used for conveying exogenous gas into the filter bed of the filter tank; the aeration device is used for transferring the exogenous gas conveyed by the carrier gas device to each part of the filter bed of the filter tank, so that pollutants attached to the filter material of the filter tank fall off under the action of the exogenous gas, and the purpose of cleaning the filter material is achieved; wherein:

The aeration device consists of a plurality of aeration pipes;

the carrier gas device comprises a spring gas pipe, a carrier gas main pipe and a plurality of groups of carrier gas branch pipe assemblies, wherein the carrier gas main pipe is arranged along the length direction of the filter tank, namely the longitudinal direction; one end of the spring air pipe is connected with the spring air pipe, and the other end of the spring air pipe is closed; a plurality of groups of carrier gas branch pipe assemblies are arranged at the lower part of the carrier gas manifold along the length direction of the carrier gas manifold, and each group of carrier gas branch pipe assemblies consists of at least 1 carrier gas branch pipe;

the carrier gas branch pipe is in an inverted T shape and comprises a vertical part, a horizontal part and an aeration pipe connecting part, wherein the vertical part is connected with the carrier gas main pipe, and the horizontal part is positioned at the lower end of the vertical part, fixedly connected with the vertical part and mutually perpendicular; the aeration pipe connecting parts are positioned at two ends of the horizontal part and extend downwards to be parallel to each other, and at least 1 fixing piece is respectively arranged on one side opposite to the aeration pipe connecting parts and used for fixing and installing the aeration pipe of the aeration device; and two opposite fixing pieces are positioned in the same horizontal plane;

the vertical parts of the carrier gas branch pipes extend along the depth direction of the filter tank and extend from top to bottom, the upper ends of the carrier gas branch pipes are fixedly connected with the carrier gas main pipe and are communicated with the interior of the carrier gas main pipe, and exogenous gas in the carrier gas main pipe is downwards introduced into the horizontal part at the lower ends of the carrier gas main pipe; the horizontal part transversely extends, and the middle position of the upper part of the horizontal part is fixedly connected and communicated with the vertical part, namely, the vertical part of each carrier gas branch pipe is fixedly connected to the symmetrical center of the horizontal part.

2. The auxiliary gas flushing system of claim 1, wherein the lifting device comprises a support frame, a screw rod and a wheel disc, the screw rod vertically penetrating the support frame; the wheel disc is fixedly arranged on the spiral screw rod and is positioned at the upper part of the supporting frame.

3. The auxiliary gas flushing system of claim 1 or 2, wherein the carrier gas device comprises a spring gas pipe, a carrier gas main pipe and a plurality of carrier gas branch pipes which are communicated with each other, wherein one end of the carrier gas main pipe is connected with the spring gas pipe, and the other end of the carrier gas main pipe is closed; and a plurality of carrier gas branch pipes are arranged at the lower part of the carrier gas manifold along the length direction of the carrier gas manifold.

4. The auxiliary gas flushing system of claim 1, wherein the upper portion of the carrier gas manifold is fixedly connected to the lower end of a screw of the lifting device.

5. The auxiliary gas flushing system of claim 1, wherein the vertical portion of the carrier gas manifold has a height greater than the sum of the height of the water distribution tank, the height of the water distribution tank bottom from the surface of the filter bed, and the depth of cleaning of the filter bed; the length of the horizontal part is adapted to the width of the filter tank.

6. The auxiliary gas flushing system of claim 1, wherein the aeration pipe is fixedly connected with the aeration pipe connection part of the carrier gas branch pipe to form a complete carrier gas closed loop.

7. The auxiliary gas flushing system of the filtering pond of the water works comprises a plurality of lifting devices, a carrier gas device and an aeration device which are arranged in parallel, and is characterized in that the lifting devices are fixedly connected with the carrier gas device, the aeration device is fixedly arranged at the lower part of the carrier gas device, wherein the lifting devices are used for lifting or lowering the carrier gas device, extending the carrier gas device into a filter bed of the filtering pond or lifting the carrier gas device from the filter bed of the filtering pond; the carrier gas device is used for conveying exogenous gas into the filter bed of the filter tank; the aeration device is used for transferring the exogenous gas conveyed by the carrier gas device to each part of the filter bed of the filter tank, so that pollutants attached to the filter material of the filter tank fall off under the action of the exogenous gas, and the purpose of cleaning the filter material is achieved; wherein:

the aeration device consists of a plurality of aeration pipes;

the carrier gas device comprises a spring gas pipe, a carrier gas main pipe and a plurality of groups of carrier gas branch pipe assemblies, wherein one end of the carrier gas main pipe is connected with the spring gas pipe, and the other end of the carrier gas main pipe is closed; a plurality of groups of carrier gas branch pipe assemblies are arranged at the lower part of the carrier gas manifold along the length direction of the carrier gas manifold, and each group of carrier gas branch pipe assemblies consists of at least 1 carrier gas branch pipe;

The carrier gas branch pipe is in an inverted T shape and comprises a vertical part, a horizontal part and an aeration pipe connecting part, wherein the vertical part is connected with the carrier gas main pipe, and the horizontal part is positioned at the lower end of the vertical part, fixedly connected with the vertical part and mutually perpendicular; the aeration pipe connecting parts are positioned at two ends of the horizontal part and extend downwards to be parallel to each other, and at least 1 fixing piece is respectively arranged on one side opposite to the aeration pipe connecting parts and used for fixing and installing the aeration pipe of the aeration device; and the two opposite fixing pieces are positioned in the same horizontal plane.