CN104107571B - A kind of vertical cylinder type container online back washing device of granular filler filter - Google Patents

Abstract

An on-line backwashing device for a vertical cylindrical container particle packing filter. At least N layers of water-permeable and sand-proof isolation nets are arranged in the filter cylinder, and N is a natural number greater than or equal to 2; N layers of water-permeable and sand-proof isolation nets divide the packing section into at least N -1 unit filter layer; the sand suction port is connected to the impurity pump inlet after passing through the sand retaining valve and the pump inlet valve; the sand suction pipe passes through the sand suction pipe valve and is connected to the sand washing in each unit filter layer through the sandblasting water pipe The inlet of the sandblasting pipe; the outlet of the sewage on the sand storage filter is connected to the grit chamber through the sewage outlet valve, and the other way is connected to the inlet of the sandblasting pipe in the filter layer of each unit through the circulation pipe. The invention can ensure that the equipment is backwashed without stopping, avoiding the impact on the peripheral sewage treatment equipment; the way of cleaning the packing by pumping through the pump makes the packing get the maximum cleaning and ensures that the equipment can always Maintaining the best filtration effect can thoroughly promote the qualified rate of sewage treatment.

Description

An online backwashing device for a vertical cylindrical container particle packing filter

technical field

The invention relates to the technical field of purification and treatment of oil production sewage, in particular to an online backwashing device for a particle packing filter of a vertical cylindrical container.

Background technique

With the development of the petroleum industry, the requirements for the purification and treatment of oily sewage produced from oil reservoirs are getting higher and higher. Oil production sewage comes from the water produced in downhole oil reservoirs, so it contains more components, especially many visible impurities. and mud; it needs to be purified to meet the requirements of reinjection water and then reinjected into the formation. The working principle of the traditional granular packing filter is to rely on the complex gaps between the granular packing to intercept and absorb visible impurities and mud, so that the granular packing gradually forms mud. Cake, the packing of the traditional particle packing filter is accumulated in the filter, and after the mud cake is formed, a large amount of impurities and sludge are retained in the packing layer with the thickness of the mud cake, and it is difficult to disperse the mud cake inside the packing with air and water backwashing Washing, coupled with the high salinity of oil production sewage, leads to calcification and solidification of granular fillers, which affects the normal operation of the normal sewage treatment system.

Contents of the invention

The purpose of the present invention is to design a novel online backwashing device for a vertical cylindrical container particle packing filter to solve the above problems.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

An online backwashing device for a vertical cylindrical container particle packing filter, including a filter cartridge, an impurity pump and a sand storage filter, the filter cartridge is placed vertically, and the filter cartridge includes a water inlet cabin, a packing section and a water outlet In the cabin, at least N layers of permeable and sand-proof isolation nets are arranged in the filter cartridge, and N is a natural number greater than or equal to 2; the N layers of water-permeable and sand-proof isolation nets divide the packing section into at least N-1 unit filter layers;

Each of the unit filter layers is filled with granular filler, the top of each of the unit filter layers is provided with a sand blasting pipe, and the water-permeable and sand-proof isolation net at the bottom of each of the unit filter layers is arranged obliquely, and A sand suction port is provided on the wall of the filter cartridge at the lowest point, and the sand suction port is connected to the inlet of the impurity pump after passing through the sand retaining valve and the pump inlet valve;

The outlet of the impurity pump is connected to the inlet of the sand storage filter; a sand suction pipe is set on the sand storage filter, and after passing through the sand suction pipe valve, it is connected to each of the unit filter layers through a sandblasting water pipe. The inlet of the sand washing and blasting pipe; the sand storage filter is also provided with a sewage outlet, and the sewage outlet leads to two pipelines after passing through the sewage outlet valve, one way is connected to the grit chamber, and the other way is through the circulation The pipe is also connected to the sandblasting water pipe, and further connected to the inlet of the flushing sandblasting pipe in each of the unit filter layers.

A sand storage filter inlet valve is provided on the pipeline connecting the outlet of the impurity pump to the inlet of the sand storage filter.

The inlet valve of the sand blasting pipe is provided on the pipeline connecting the sand blasting water pipe to the inlet of the sand washing and sand blasting pipe in each of the unit filter layers.

The sand suction port passes through the sand retaining valve and the pump inlet valve in sequence, and then connects to the inlet of the impurity pump.

The water inlet cabin is provided with a sewage inlet, and the water outlet cabin is provided with a clean water outlet.

The permeable sand control isolation net is a metal isolation net.

The on-line backwashing technology of vertical cylindrical container particle packing filter mainly relies on: metal isolation net, sand washing and sand blasting pipe, impurity pump, sand storage filter, sand retaining valve, sand suction pipe and sand blasting water pipe. Backwashing (online backwashing) of the packing layer while the container is not shutting down; during the online backwashing process, the packing and impurities are discharged through the impurity pump for cleaning and separation, and then enter the sand storage filter for cleaning, and then are discharged through the circulation pipeline. Redistribute into the packing layer; thus, the packing particles will be thoroughly cleaned to ensure the effective porosity of the packing, while the separated impurities and dirt will be completely discharged.

The beneficial effects of the present invention can be summarized as follows:

The technology of the present invention can ensure that the equipment is backwashed without stopping, avoiding the impact on the peripheral sewage treatment equipment; the way of cleaning the packing through the pump is to maximize the cleaning of the packing and ensure that the equipment It can always maintain the best filtering effect and has a thorough promotion effect on ensuring the qualified rate of sewage treatment.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

detailed description

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, an online backwashing device for a vertical cylindrical container particle packing filter includes a filter cartridge 1, an impurity pump 2 and a sand storage filter 3, the filter cartridge 1 is placed vertically, and the filter cartridge 1 is placed vertically. The cylinder 1 includes a water inlet cabin 16, a packing section 18 and a water outlet cabin 17. At least N layers of permeable and sand-proof isolation nets 4 are arranged in the filter cylinder 1, and N is a natural number greater than or equal to 2; the N-layer water-permeable and sand-proof isolation nets 4 will The packing section 18 is divided into at least N-1 unit filter layers 5; each of the unit filter layers 5 is filled with granular fillers, and the top of each of the unit filter layers 5 is provided with a sand blasting pipe 6, The permeable sand control isolation net 4 at the bottom of each unit filter layer 5 is inclined, and a sand suction port is provided on the wall of the filter cartridge 1 at the lowest point thereof, and the sand suction port passes through a sand retaining valve 7 and the pump inlet valve 8 are connected to the inlet of the impurity pump 2; the outlet of the impurity pump 2 is connected to the inlet of the sand storage filter 3; a sand suction pipe 9 is set on the sand storage filter 3, After the sand suction pipe valve 10, the sandblasting water pipe 11 is connected to the inlet of the sand washing and sandblasting pipe 6 in each of the unit filter layers 5; the sand storage filter 3 is also provided with a sewage outlet, so The sewage outlet leads to two pipelines after the sewage outlet valve 12, one way is connected to the grit chamber 13, and the other way is also connected to the sandblasting water pipe 11 through the circulation pipe, and then connected to each of the unit filter layers 5 The inlet of the sand blasting pipe 6 in the sand washing.

In a more preferred embodiment, a sand storage filter inlet valve 15 is provided on the pipeline connecting the outlet of the impurity pump 2 to the inlet of the sand storage filter 3 . The sandblasting water pipe 11 is connected to the inlet of the sandblasting and sandblasting pipe 6 in each unit filter layer 5, and a sandblasting and sandblasting pipe inlet valve 19 is provided on the pipeline.

In a more preferred embodiment, the sand suction port is connected to the inlet of the impurity pump 2 after passing through the sand control valve 7 and the pump inlet valve 8 in sequence.

In a more preferred embodiment, the water inlet compartment 16 is provided with a sewage inlet, and the water outlet compartment 17 is provided with a clean water outlet.

In a more preferred embodiment, the permeable sand control isolation net 4 is a metal isolation net.

When in use, when the unit filter layer 5 of a certain layer of the vertical cylindrical container particle packing filter needs to backwash the packing because the filter mud cake is too thick, first open the sand retaining valve 7 and start the impurity pump 2 to extract the particles Filler, granular filler is fully cleaned in the impurity pump 2 and then pumped out together with the dirty liquid, and enters the sand storage filter 3 for separation. After the granular filler is filtered and retained, the dirty liquid is divided into two paths: one path passes through the circulation pipe 14 and continues to enter the sand blasting The pipe 6 is used to flush the residual sand in the packing layer to assist the impurity pump 2 in pumping sand, and the other way is discharged into the grit chamber, so as to achieve online backwashing of the discharged packing while circulating;

When the online backwashing process is over, open the sand suction pipe 9, close the circulation pipe 14, and close the sand retaining valve 7 of this layer, so that the filler in the sand storage filter enters the sand washing and sandblasting pipe 6 with the circulating water, and the filler is placed in the filler After the deposition and arrangement between layers of metal isolation nets are completed, the packing layer of this layer resumes the filtering function;

The online backwashing of other packing layers is the same as the above steps.

When the vertical cylindrical container particle packing filter comprises a plurality of said unit filter layers 5, both can simultaneously clean each layer said unit filter layer 5 of the whole vertical cylindrical container particle packing filter; more convenient More importantly, each unit filter layer 5 can be cleaned in turn without affecting the work of the entire vertical cylindrical container particle packing filter, thereby realizing non-stop cleaning of the entire vertical cylindrical container particle packing filter.

The present invention has been described in detail above through specific and preferred embodiments, but those skilled in the art should understand that the present invention is not limited to the above-described embodiments, and within the spirit and principles of the present invention, any Modifications, equivalent replacements, etc., should all be included within the protection scope of the present invention.

Claims (5)

1. An online backwashing device for a vertical cylindrical container particle packing filter, characterized in that: it includes a filter cartridge, an impurity pump and a sand storage filter, the filter cartridge is placed vertically, and the filter cartridge includes an inlet water Cabin, packing section and water outlet cabin, at least N layers of permeable and sand-proof isolation nets are arranged in the filter cartridge, and N is a natural number greater than or equal to 2; the N-layer water-permeable and sand-proof isolation nets divide the packing section into at least N-1 unit filter layer; Each of the unit filter layers is filled with granular filler, the top of each of the unit filter layers is provided with a sand blasting pipe, and the water-permeable and sand-proof isolation net at the bottom of each of the unit filter layers is arranged obliquely, and A sand suction port is provided on the wall of the filter cartridge at the lowest point, and the sand suction port is connected to the inlet of the impurity pump after passing through the sand retaining valve and the pump inlet valve; The outlet of the impurity pump is connected to the inlet of the sand storage filter; a sand suction pipe is set on the sand storage filter, and the sand suction pipe passes through the sand suction pipe valve and then is connected to each of the sand blasting water pipes. The inlet of the sand washing and blasting pipe in the unit filter layer; the sand storage filter is also provided with a sewage outlet, and the sewage outlet leads to two pipelines after passing through the sewage outlet valve, and is connected to the grit chamber all the way. The other path passes through the circulation pipe and is also connected to the sandblasting water pipe, and then connected to the inlet of the sand washing and sandblasting pipe in each of the unit filter layers; When in use, when the unit filter layer of a certain layer of the vertical cylindrical container particle packing filter needs to backwash the particle packing because the filter mud cake is too thick, first open the sand retaining valve, start the impurity pump to pump out the particle packing, After the particle filler is fully cleaned in the impurity pump, it is pumped out together with the sewage, and enters the sand storage filter for separation. After the particle filler is filtered and retained, the sewage is divided into two paths: one path continues through the circulation pipe and continues into the sand blasting pipe for flushing the packing section The residual granular filler is used to assist the pumping of the impurity granular filler, and the other way is discharged into the grit chamber, so as to achieve online backwashing of the discharged granular filler while circulating; When the online backwashing process is over, open the valve of the sand suction pipe, close the circulation pipe, and close the sand retaining valve of the filter layer of the unit, so that the particle packing in the sand storage filter enters the sand washing and sandblasting pipe with the circulating water, and the particle packing is in the packing The deposition arrangement between the permeable and sand-proof isolation nets of the section is completed, and the filter layer of this unit resumes the filtering function. 2. The on-line backwashing device for a vertical cylindrical container particle packing filter according to claim 1, characterized in that: the pipeline connecting the outlet of the impurity pump to the inlet of the sand storage filter is provided with a storage tank. Sand filter inlet valve. 3. The online backwashing device for vertical cylindrical container particle packing filter according to claim 1, characterized in that: the sandblasting water pipe is connected to the sandblasting sandblasting in each of the unit filter layers The inlet pipeline of the pipe is provided with an inlet valve for the sand blasting pipe. 4. The online backwashing device for a vertical cylindrical container particle packing filter according to claim 1, characterized in that: the water inlet cabin is provided with a sewage inlet, and the water outlet cabin is provided with a clean water outlet. 5. The online backwashing device for a vertical cylindrical container particle packing filter according to claim 1, characterized in that: the water-permeable and sand-proof isolation net is a metal isolation net.