CN212609686U - Waste water solid-liquid separation device - Google Patents

Abstract

The utility model provides a waste water solid-liquid separation equipment, waste water solid-liquid separation equipment is in including being cylindrical casing, setting microfiltration membrane, setting in the casing are in the water inlet of casing one end, with the backwash column that the casing other end is connected, with keep away from the product mouth of a river that backwash column one end is connected, with keep away from the gas injection device that backwash column one end is connected. The utility model discloses a waste water solid-liquid separation equipment structure is inseparable, has reduced holistic volume, and the treatment effect is good, the problem of the clearance of being convenient for.

Description

Waste water solid-liquid separation device

Technical Field

The utility model relates to a waste water solid-liquid separation equipment.

Background

The types of wastewater are various, and the wastewater with high salt and high pH is undoubtedly the wastewater which is difficult to treat. In the wastewater, most of the wastewater needs to be subjected to solid-liquid separation, namely, solids (including colloid, silt, sludge and the like) which are insoluble in water are separated from a solid-liquid system of the wastewater, and finally, clarified impurity-free water or a solid-liquid mixture with improved concentration is obtained;

the traditional method for realizing solid-liquid separation comprises the following steps: clarification/sedimentation tank, sand filtration, ultrafiltration, etc. However, the application of these techniques to high-salt, high-pH wastewater is very limited.

a. Clarification/sedimentation tank

The clarification/sedimentation tank is characterized in that solid particles are settled to the bottom of the water tank by utilizing the gravity of the particles and a mode of increasing the specific gravity of the particles after coagulation, and the solid particles are discharged from the bottom of the water tank in a gravity or power mode. The method has low investment cost and is the best choice for solid-liquid separation of some heavy particulate matters. But the limitation is very obvious, when the concentration of the particulate matters in the wastewater is low and the specific gravity of the wastewater is less than or equal to that of water, the precipitation effect of the wastewater is greatly influenced, the effluent clarity of the clarified liquid is greatly influenced by the fluctuation of the initial influent water quality at the front end, and the effluent of the clarified liquid is very easy to be unqualified.

Meanwhile, a certain amount of coagulant, coagulant aid and other medicaments are often required to be added into raw water of the clarification/sedimentation tank, so that the sedimentation capability of particulate matters in water is enhanced. If some waste water needs to recover valuable particles, the solid matters can be polluted by adding chemicals, but the recoverability of the waste water is lost, and secondary pollution is caused.

b. Sand filter

Sand filtration is a traditional filtration technique in which wastewater is introduced into a container filled with stacked fillers (such fillers include quartz sand, cobblestones, and the like), and solid particles are trapped in gaps between the fillers by using the filtration capacity of the stacked fillers. Compared with a clarification/sedimentation tank, the solid-liquid separation capacity of the device greatly improves the precision range of filtration, and the flexibility of operation and lower investment cost of the device make the device become a widely used solid-liquid separation technology. In principle, the filtration mode is dead-end filtration, i.e. solid particles are all trapped on the surface of the filter material, which causes the inevitable defects: the filtering load is limited. The sand filtration is used for realizing solid-liquid separation, the filtering capacity needs to be recovered (often needing to be cleaned) in a short time, meanwhile, the requirement of the inlet water on the water quality is strict, if the inlet water is high-salt and high-pH value, salt crystallization can occur in a filtering filler, even when a filter material is quartz sand (SiO2 is mainly used), partial free silicon is dissolved out, and the whole waste water is caused to introduce secondary pollutants, so that the secondary pollutants are not paid. Meanwhile, due to the limitation of the filter filler and the filtering precision, the requirement of subsequent advanced treatment cannot be met, so the front end of the sand filter is generally combined with a clarification/sedimentation tank, and the rear end of the sand filter is generally combined with ultrafiltration and the like.

c. Ultrafiltration

The ultrafiltration is a microporous filtration membrane with the filtration pore size range of 0.001-0.02 micron, the filtration is usually driven by pressure difference, and the core component of the ultrafiltration membrane is an ultrafiltration membrane. Ultrafiltration is an extremely fine filtration technique that can filter particles of colloid size (specific gravity equal to or less than water) in the trapped water, only water and solutes of low molecular weight can pass through the membrane, both organic and inorganic types. Because ultrafiltration has such high-precision filtering capability, the requirement on inlet water is more strict, the requirement on the concentration of particulate matters in wastewater is very high, and the types of the particulate matters, the hydrophilicity and hydrophobicity of organic matters in water, the molecular weight of the organic matters, the pH value of the wastewater and the like are limited.

In the wastewater with high salinity and high pH value, the traditional solid-liquid separation technology has great defects in the aspects of separation precision, separation effect, separation capacity and the like.

In view of the above, there is a need for an improved solid-liquid separation apparatus for wastewater to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a waste water solid-liquid separation equipment to solve the poor problem of current waste water solid-liquid separation equipment separation effect.

In order to realize the purpose, the utility model provides a waste water solid-liquid separation equipment, be in including being cylindrical casing, setting microfiltration membrane, setting in the casing are in the water inlet of casing one end, with the backwash column that the casing other end is connected, with keep away from the product mouth of a river that backwash column one end is connected, with keep away from the gas injection device that backwash column one end is connected.

As a further improvement of the utility model, the waste water solid-liquid separation device be equipped with broken siphon device that the casing is connected, broken siphon device sets up and is being close to the one end of water inlet.

As a further improvement of the utility model, the backwash column with be equipped with the outlet pipe between the casing, the diameter of backwash column is greater than the diameter of outlet pipe.

As a further improvement, the wastewater solid-liquid separation device comprises a cleaning device, the cleaning device comprises a cleaning water tank, a communicating cleaning water tank and the cleaning water pipe of the shell, and water in the cleaning water tank is discharged into the cleaning pump of the shell.

As a further improvement of the present invention, the cleaning device further comprises a cleaning agent discharge pipe communicated with the cleaning water tank.

As a further improvement of the utility model, the wastewater solid-liquid separation device further comprises a water inlet pipe connected with the water inlet and a circulating pump connected with the water inlet pipe.

The utility model has the advantages that: the utility model discloses a waste water solid-liquid separation equipment, through setting up columnar casing and microfiltration membrane, thus make waste water produce the tangent vector quantity of the high velocity of flow on the microfiltration membrane surface, improve the anti-pollution of the said waste water solid-liquid separation equipment, through setting up the gas injection device, thus can inject gas reversely, wash the said microfiltration membrane, improve the time that the said waste water solid-liquid separation equipment operates; the utility model discloses a waste water solid-liquid separation equipment structure is inseparable, has reduced holistic volume, and the treatment effect is good, the problem of the clearance of being convenient for.

Drawings

FIG. 1 is a schematic perspective view of a wastewater solid-liquid separation apparatus according to the present invention;

FIG. 2 is a schematic front structural view of the wastewater solid-liquid separation device of the present invention;

FIG. 3 is a schematic side view of the wastewater solid-liquid separation device of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to fig. 3, the wastewater solid-liquid separation device 100 of the present invention comprises a cylindrical housing 1, a micro-filtration membrane in the housing 1, a broken siphon device 2 connected to the housing 1, a water inlet 11 at one end of the housing 1, a water inlet pipe 4 connected to the water inlet 11, a circulating pump 5 connected to the water inlet pipe 4, a backwash column 6 connected to the other end of the housing 1, a water producing port 10 connected to one end of the backwash column 6, and a gas injection device 3 and a cleaning device 7 connected to one end of the backwash column 6.

The microfiltration membrane is made of PP material and has the capacity of resisting high salinity and high pH value, so that the wastewater solid-liquid separation device 100 can treat wastewater with high salinity and high pH value.

Wastewater to be treated is introduced into the shell 1 through the circulating pump 5 and the water inlet pipe 4, water and small and medium soluble organic matters in the wastewater permeate through the microfiltration membrane, and particulate matters and pollutants in the wastewater are accumulated on the surface of the microfiltration membrane. The wastewater is tangential flow relative to the surface of the microfiltration membrane, the flow velocity of the wastewater forms tangential force on the surface of the microfiltration membrane, and the cross flow velocity is more than or equal to 3 m/s. The filtering mode has the advantages that the accumulation rate and the peeling rate of particulate matters and pollutants accumulated on the surface of the microfiltration membrane in the wastewater can basically maintain a balanced state, the effective time of filtering is greatly prolonged, the water scouring is utilized to a greater extent, and the cleaning frequency of the microfiltration membrane is reduced.

The siphon breaking device 2 is arranged at one end close to the water inlet 11, and the siphon breaking device 2 can break the siphon effect generated at the water producing side.

In this embodiment, the number of the housing 1 and the number of the micro-filtration membranes may be plural, and the water producing ports 10 of the plurality of housings 1 are connected by the connection pipe 9. A water outlet pipe 8 is arranged between the backwashing column 6 and the shell 1, further, the backwashing column 6 is connected with the connecting pipe 9, and the diameter of the backwashing column 6 is larger than that of the water outlet pipe 8. The backwashing column 6 is used for storing part of water, and when the gas injection device 3 injects gas, the water stored in the backwashing column 6 enters the shell 1 to clean the microfiltration membrane in the shell 1

The cleaning device 7 comprises a cleaning water tank 71, a cleaning water pipe 72 for communicating the cleaning water tank 71 with the housing 1, a cleaning pump 73 for discharging water in the cleaning water tank 71 into the housing 1, and a cleaning agent discharge pipe 74 for communicating the cleaning water tank 71.

Through cleaner discharge pipe 74 to inject the cleaner in the washing water tank 71, when needs wash the micro-filtration membrane, the cleaner that the scavenging pump 73 will wash in the water tank 71 is impressed casing 1 and further gets into inside the micro-filtration membrane, and the pneumatic pump passes through the gas injection device and injects the gas to the micro-filtration membrane this moment, and great atmospheric pressure and cleaner combined action will be attached to the cake layer on micro-filtration membrane surface is washed away, passes through water inlet 11 again to water injection in the micro-filtration membrane can be washed away by the cake layer that washes away.

The wastewater treated by the micro-filtration membrane can directly enter the advanced treatment equipment at the rear end without solid-liquid separation again.

The wastewater solid-liquid separation device 100 of the utility model is provided with the columnar shell 1 and the microfiltration membrane, so that wastewater generates a tangential vector with high flow velocity on the surface of the microfiltration membrane, the pollution resistance of the wastewater solid-liquid separation device 100 is improved, and the gas injection device 3 is arranged, so that gas can be injected reversely to clean the microfiltration membrane, and the operation time of the wastewater solid-liquid separation device 100 is prolonged; the utility model discloses a 100 structures of waste water solid-liquid separation equipment are inseparable, have reduced holistic volume, and the treatment effect is good, the problem of the clearance of being convenient for.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.

Claims (6)

1. The utility model provides a waste water solid-liquid separation equipment which characterized in that: the wastewater solid-liquid separation device comprises a columnar shell, a microfiltration membrane arranged in the shell, a water inlet arranged at one end of the shell, a backwashing column connected with the other end of the shell, a water outlet connected with one end far away from the backwashing column and a gas injection device connected with one end far away from the backwashing column.

2. The solid-liquid separation apparatus for wastewater according to claim 1, characterized in that: the waste water solid-liquid separation device is provided with a broken siphon device connected with the shell, and the broken siphon device is arranged at one end close to the water inlet.

3. The solid-liquid separation apparatus for wastewater according to claim 1, characterized in that: and a water outlet pipe is arranged between the backwashing column and the shell, and the diameter of the backwashing column is larger than that of the water outlet pipe.

4. The solid-liquid separation apparatus for wastewater according to claim 1, characterized in that: the waste water solid-liquid separation device comprises a cleaning device, wherein the cleaning device comprises a cleaning water tank, a cleaning water pipe and a cleaning pump, the cleaning water pipe is communicated with the cleaning water tank and the shell, and the cleaning pump is used for discharging water in the cleaning water tank into the shell.

5. The solid-liquid separation apparatus for wastewater according to claim 4, characterized in that: the cleaning device also comprises a cleaning agent discharge pipe communicated with the cleaning water tank.

6. The solid-liquid separation apparatus for wastewater according to claim 1, characterized in that: the wastewater solid-liquid separation device also comprises a water inlet pipe connected with the water inlet and a circulating pump connected with the water inlet pipe.

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