CN2101518U - Sand filter for continuous vulcanizing bed - Google Patents

Abstract

The utility model discloses a sand filter for a continuous vulcanizing bed. A filtering layer is arranged at the lower part of a cylinder body whose bottom is a cone-shaped bottom closing. The cylinder center is provided with a lift pipe for filtering material and a filtering material cleaner is arranged at the exit nozzle on the upper part of the lifting pipe. Raw water flows in from the bottom of the filtering material and then is discharged from the upper part. The ineffective filtering material after the impurity interception is continuously lifted from the bottom to clean and then the suspended matter is discharged, and the flushed filtering material is returned from the upper part continuously. Thus a flowing filter device of continuous circulation is formed. The function of filtering material interception is enhanced and the pressure loss of the water flow is decreased. Thus the equipment efficiency is enhanced and energy is saved. The utility model can be widely used in the water-treatment projects.

Description

Sand filter for continuous vulcanizing bed

The utility model is relevant with water treatment facilities, more specifically says so about the filter plant of water.

Filtration is that liquid passes through porous matter filtrate, make suspension and fluid separation applications, conventional sand filter plant, former exactly water flows through sand filter blanket, and under the gravity effect, the suspended material in the water is held back by sand filter blanket, purify waste water and see through the sand filter blanket outflow, thereby reach the purpose of purifying waste water, this sand filtration method, sand filter blanket plays the filtration of holding back suspended material.Along with the increase of interception, the head pressure loss also increases gradually, and after the pressure loss acquired a certain degree, filtering layer lost efficacy.At this moment, filtering layer will out of servicely carry out backwash, to recover the strainability that it holds back suspended material.But conventional sand filter method, because the sand filter course is static, sand filter blanket only plays the filtration of holding back suspended material at surperficial one deck, and the layer of sand of sand filter blanket bottom, performance should not held back function.

The purpose of this utility model is to provide a kind of head pressure loss little, and power consumption economizes, and can bring into play the sand filtering device that the unit sand filtering layer is held back function.

Solution of the present utility model is sand filter blanket and Yuan Shui to be opposed drift moving, and former water upwards flows through sand filter blanket, removes the impurity in the former water, makes water obtain to purify, and sand filter blanket then moves down, and the fresh sand through cleaning constantly adds on the sand filter blanket from top.This mobile sand filtering device is achieved in that a bottom be in the cylindrical tube of taper back cover, and one deck media filtration layer is arranged at the bottom.Here said filtrate is normally selected the sand of certain particle size for use, and the one, material is easy to get, and the 2nd, strength ratio is higher, can certainly select other porous matter filtrates for use.At the center of cylindrical tube a filtrate riser is arranged, be positioned at the top of filtrate riser, a filtrate washer is housed with respect to the exit of riser.The height of said cylinder is 300～600 centimetres, and diameter is 80～250 centimetres, and its ratio of height to diameter is 2.3～4.0:1.Filtrate in cylinder should be kept certain height, and the height of general filter material layer is 160～320 centimetres, and the pack completeness of filtrate is 65～70%.

An important feature of the present utility model is: an end of said filtrate riser is located on or near the bottom of cylinder filter material layer, and the other end then extend in the filtrate washer.The diameter of filtrate riser is 25～45 millimeters, the filtrate disperser also is housed on the outer wall of filtrate riser, said filtrate disperser is that a kind of truncated cone-shaped is disperseed umbrella, the drift angle that disperses umbrella be 60 degree first to disperse the residing position of umbrella be 80 to 100 millimeters places of exit position below with respect to the filtrate washer.The sand that falls from the filtrate washer or other filtrates can be sprinkling upon on the filter material layer equably like this.

Another important feature of the utility model is: the filtrate washer that is positioned at the riser exit includes scavenge pipe, separation chamber and gas release room three parts.One of said separation chamber also becomes whole hollow cylinder with it above scavenge pipe, the diameter of hollow cylinder has a blow-off pipe greater than scavenge pipe on hollow barrel.At the center of separation chamber the cylinder that soaks under is arranged, the separation chamber is separated into two parts, the center is that the top cover of gas release room and whole sand filtering device fuses, and a blast pipe is arranged on top cover.Said scavenge pipe, come down to by one be enclosed within riser outer and with it axisymmetricly cylinder forms, some break-in plates are housed between cylinder and riser, this interlayer is changed over the passage of complications.One end of filtrate riser is located on or near the bottom of cylindrical tube filter material layer, in the bottom of riser, has an air hose to extend in the riser.The other end of riser extend in the interior gas release room of filtrate washer, and the position of riser outlet is higher than gas release room end opening, and is in the top of end-of-the-pipe.Compressed air drives sand filtering device bottom failed filtrate [as sand] like this, because the support of air rises to the top with certain speed along riser.After filtrate left the lifting mouth of pipe, because separation chamber's caliber increases rate of flow of fluid suddenly and pressure descends, air was released from fluid, suspension in the fluid and filtrate [as sand grains], because of the greatly different difference of proportion, suspension is discharged by blow-off pipe because the support of ascending current moves up.Sand grains is then because the gravity effect of self whereabouts enters scavenge pipe, the top of falling back to sand filter blanket after washing once more by tortuous passageway.

In the sand filtering device filter material layer, near the bottom of filter material layer, some water-locators are housed, above the water-locator outlet, should keep 0.8～1 meter thick filter course.Former water upwards passes through filter material layer from these water-locator accesss to plant.Suspended material in the former water is intercepted and captured by filtrate, and the clear water after the purification rises to the top of cylindrical tube by filter material layer, discharges through water leg.

For structure that the continuous fluidized bed sand filtering device that the utility model provides is described better and the technical process of handling water, be further described with an example below in conjunction with accompanying drawing.

Fig. 1 represents the cutaway view of this device;

Fig. 2 is the A-A view of shown in Figure 1 device;

Fig. 3 is the B-B view of shown in Figure 1 device.

As shown in Figure 1, a diameter is 80 centimetres, high 300 centimetres cylindrical drum (5), and there are 165 centimetres of high sand filter blankets of one deck [8] bottom with conical head in the bottom of cylinder, and the fine sand that is filled with particle diameter and is 0.8～1 millimeter is as filtrate.In the bottom of sand filter blanket, some water-locators [10] are housed, be equipped with water distributing plate [9] in the exit of water-locator, in case filter sand stops up water distributor, and former water evenly can be disperseed.The position of water-locator outlet should keep water-locator outlet top that the sand filter blanket of 80～100 cm thicks is arranged.It is 32 millimeters that a diameter is arranged at the center of cylinder, highly about 250 centimetres filtrate riser [7].One end of said filtrate riser is located on or near the bottom of cylinder sand filter blanket, has an air hose [11] to extend in the pipe of riser bottom, in order to drive filter sand upwards motion in riser.

Be positioned at the top of filtrate riser, with respect to the exit of riser, a filtrate washer [16] arranged, said filtrate washer comprises scavenge pipe [4], separation chamber [15] and gas release room three parts such as [13].A blow-off pipe [14] is arranged in the separation chamber, lead to cylindrical drum [5] in addition, in order to the suspended material of discharging separation.A blast pipe [12] is arranged above the gas release room.Said scavenge pipe [4], below the separation chamber, diameter is less than the separation chamber, and the filtrate riser extend in the air release room from passing here always.In the interlayer between scavenge pipe and riser, some break-in plates [17] are housed, this interlayer is changed over tortuous passage.On the tube wall of riser below the washer, some filtrates also are housed disperse umbrella [6], first disperses umbrella to be positioned at 80 millimeters places, washer outlet below.Also have a water leg in order to collection and purification water [2] and delivery port [3] near cylindrical drum [5] suitable for reading, a charge door [1] is arranged at the top, so just constitutes a complete and continuous fluid bed sand filtering device in order to input or the usefulness of adding filter sand.

Utilize this device to carry out purificating raw water, its technical process is: in water distributor [10] access to plant of former water through being located at the sand filter blanket bottom, by former water water distributing plate [9], water is evenly distributed in the whole sand filtering area.Former water is so that upwards the type of flow is by sand filter blanket [8], and the suspension in the former water is intercepted and captured by sand filter blanket, removes the impurity in the former water, and water is purified, and the clear water after the purification is discharged by delivery port [3] through water leg [2].

Hold back the sand grains of impurity, in filtrate riser [7],, be thus lifted to the top of filtering layer from the bottom of filtering layer by the castering action of air, filtering layer is moved down continuously, air water and sand are turbulent condition in the filtrate riser, the one side vigorous stirring, one side rises, collide mutually between the sand grains, rub, washed away by collision, make sand be purified cleaning attached to the suspended material on sand surface.After the mixture of sand, suspension and water follows air to discharge from riser, enter in the sand-washing device, because separation chamber's caliber increases, water volume flow rate and pressure descend, air discharges from water, and discharges from blast pipe 12.Suspension and sand lose the support of air, because the difference of suspension and sand proportion, the very fast sinking of sand grains enters scavenge pipe, and sand grains is collided, rubs once more and purifies cleaning in the passage of complications.Washed away the suspension that gets off, under the support of ascending current, discharged by blow-off pipe after rising enters the separation chamber.And the sand grains after washing away continues to fall, and falls back to sand filter blanket top by disperseing umbrella.Like this, make the sand of top filtering layer often keep clean state, and move down continuously with the lifting of filtering layer bottom inefficacy sand, continue to hold back Sui Yuanshui and enter suspension next in the filtering layer, thereby make the sand in the whole sand filter blanket all play crown_interception, improved effect, because the sand filter blanket that lost efficacy constantly is removed and regenerates, sand filter blanket above water-locator remains low suspension intercepting and capturing amount, thereby the water flow pressure loss is little, has also just saved power cost.

The utility model has the advantages that clearly, because the sand of continuous flushing, cleaning returns continuously from top, be raised and discharge from the bottom continuously and hold back inefficacy sand. Former water enters from the bottom simultaneously, and discharges from top. The whole sand filter blanket of result has been given full play to its function of holding back suspension. So the ability that this device is held back suspension than prior art is much higher, the pressure loss is very little in the filtering layer simultaneously, has reduced pump lift, thereby has also saved power cost. This device can extensive use in the former engineering of water treatment of different turbidity.

Claims (10)

1, a kind of fluid bed sand filtering device, comprise a filter, a filtrate conveyer and a filtrate washer, it is characterized in that a bottom be in the cylindrical tube of taper back cover, one deck media filtration layer is arranged at the bottom, a filtrate riser is arranged at the center of cylindrical tube, be positioned at the top of filtrate riser, a filtrate washer be housed with respect to the exit of riser.

2, according to the described fluid bed sand filtering device of claim 1, the height that it is characterized in that said cylindrical tube is 300～600 centimetres, and 80～250 centimetres of diameters, ratio of height to diameter are 2.3～4.0:1.

3, according to the described fluid bed sand filtering device of claim 1, the height that it is characterized in that media filtration layer in the said cylindrical tube is 160～320 centimetres, and the pack completeness of filtrate is 65～70%.

4, according to the described fluid bed sand filtering device of claim 1, it is characterized in that an end of said filtrate riser is located on or near the bottom of cylindrical tube filter material layer, the other end extend in the filtrate washer.

5, according to the described fluid bed sand filtering device of claim 1, the diameter that it is characterized in that said filtrate riser is 25～45 millimeters.

6, according to the described fluid bed sand filtering device of claim 1, it is characterized in that on the outer wall of said filtrate riser the filtrate disperser being housed also, said filtrate disperser is that a kind of truncated cone-shaped is disperseed umbrella, the drift angle that disperses umbrella is 60 degree, and first is disperseed umbrella is 80～100 millimeters with respect to the position of filtrate washer end opening.

7, according to the described fluid bed sand filtering device of claim 1, it is characterized in that said filtrate washer comprises a scavenge pipe, separation chamber and gas release room, one of said separation chamber also becomes whole hollow cylinder with it above scavenge pipe, the diameter of hollow cylinder is greater than scavenge pipe, a blow-off pipe is arranged on hollow cylinder, also has the cylinder that soaks under at the center of separation chamber, the separation chamber is separated into two parts, the center is that gas release room and top cover fuse, and a blast pipe is arranged on top cover.

8, according to claim 1,7 described fluid bed sand filtering devices, it is characterized in that in the said filtrate washer that scavenge pipe is one and is enclosed within outside the riser, and with its cylinder axisymmetricly, some break-in plates are housed between cylinder and riser.

9, according to claim 1,4 described fluid bed sand filtering devices, it is characterized in that an end of said filtrate riser is located on or near the bottom of cylindrical tube filter material layer, bottom at riser, there is an air hose to extend in the riser, the other end of riser extend in the interior gas release room of filtrate washer, the position of riser outlet is higher than gas release room end opening, and is in the top of blow-off pipe.

10, according to the described fluid bed sand filtering device of claim 1, it is characterized in that being positioned at the media filtration layer, near the bottom of filter course some water-locators are housed, in the position of water-locator outlet, the thickness of sand filter blanket is 80～100 centimetres above should keeping exporting.

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