CN114011153A - Water granulated slag bottom filter tank system and water granulated slag bottom filter method treatment process - Google Patents

Water granulated slag bottom filter tank system and water granulated slag bottom filter method treatment process Download PDF

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Publication number
CN114011153A
CN114011153A CN202111405075.4A CN202111405075A CN114011153A CN 114011153 A CN114011153 A CN 114011153A CN 202111405075 A CN202111405075 A CN 202111405075A CN 114011153 A CN114011153 A CN 114011153A
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China
Prior art keywords
water
pipe
filter
bottom filter
slag
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Pending
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CN202111405075.4A
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Chinese (zh)
Inventor
耿明山
王英春
陈瑜
王得刚
芦良
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MCC Capital Engineering and Research Incorporation Ltd
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MCC Capital Engineering and Research Incorporation Ltd
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Priority to CN202111405075.4A priority Critical patent/CN114011153A/en
Publication of CN114011153A publication Critical patent/CN114011153A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/04—Combinations of filters with settling tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D29/72—Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/12—Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/08—Regeneration of the filter
    • B01D2201/087—Regeneration of the filter using gas bubbles, e.g. air
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/14—Maintenance of water treatment installations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/032—Separating slag from liquid, e.g. from water, after quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Filtration Of Liquid (AREA)

Abstract

The invention provides a water granulated slag bottom filter tank system and a water granulated slag bottom filter method treatment process, and relates to the technical field of metal smelting equipment, wherein the water granulated slag bottom filter tank system comprises a water storage tank, at least one bottom filter tank and an oscillating cleaning assembly; the bottom filter is divided into a slag catching area and a post-filtration sedimentation area through the modular filter layer, a back flushing pipe structure and a drainage structure are arranged in the post-filtration sedimentation area, and the back flushing pipe structure is positioned between the modular filter layer and the drainage structure; the oscillating cleaning assembly is arranged in the bottom filter chamber and used for cleaning the modular filter layer. Through the back flushing pipe structure and the vibration cleaning assembly, pollutants on the modularized filter layer can be efficiently removed, and the service life of the filter layer is prolonged. The invention also provides a water granulated slag bottom filter method treatment process, which can efficiently treat water granulated slag by using the water granulated slag bottom filter tank system.

Description

Water granulated slag bottom filter tank system and water granulated slag bottom filter method treatment process
Technical Field
The invention relates to the technical field of metal smelting equipment, in particular to a granulating slag bottom filtering pond system and a granulating slag bottom filtering method treatment process.
Background
The annual crude steel yield in the domestic steel smelting field is about 10 hundred million tons, the annual molten iron used for producing crude steel is about 7 hundred million tons, and the generated high-temperature liquid slag is about 2.5 hundred million tons. At present, the slag is generally granulated by a water-washed slag process. The blast furnace water slag flushing process comprises a bottom filtration method, a rotary drum method, a wheel method, a stirring water slag flushing process system design method, a Lassa method, a disc method and the like, and can be roughly classified into a filtration method and a mechanical method according to different slag-water separation modes. The slag is treated by a precipitation filtration method (commonly called bottom filtration method) water slag process at home and abroad. The blast furnace slag is flushed by water power, the slag is crushed by water to form a loose slag-water mixture, the slag-water mixture enters a filter tank through a slag flushing channel, liquid water is filtered by a plurality of filter layers in the filter tank, solid slag particles are deposited at the bottom of the filter tank, and the solid bulk slag is grabbed by a grabbing mechanism, loaded and transported outside. The grain diameter of the slag grains after water quenching is 0.2mm-3mm, and the slag grains are mainly used for cement raw materials, heat insulation fillers and the like and have wide application. Aiming at the practical use process, the main influencing factors influencing the slag-water separation efficiency are the filtration rate and the separation effect of the filter layer: the filtering layer is too tight, so that the filtering speed is slow, the time for separating the slag and the water is long, and meanwhile, the water content in the slag is high, so that the water resource cannot be reasonably recycled, and the waste of the water resource is caused; the filtering layer is too sparse, so that fine slag particles cannot be filtered, the fine slag particles and liquid water enter the water circulation system, severe abrasion is caused to pipelines, valves and a pump body of the water circulation system, the equipment maintenance and overhaul cost is increased, the equipment operation rate is reduced, and the normal operation of the water slag system is influenced.
The slag wool in the blast furnace slag flushing water contains a certain amount of slag wool, in the process of slag-water separation, the slag wool is easy to block filter pores in the filter layer, so that the hardening of the slag layer is caused, the hardened filter layer reduces the filtering speed and efficiency, and the slag-water system production cannot be smoothly carried out. Production practices show that the problem of filter layer hardening is a difficult problem to be solved urgently by a bottom filtration method, particularly in northern areas of China, the hardness of the slag flushing water is high, the possibility of filter layer hardening is increased, once the filter material is hardened, the replacement difficulty is increased, and the production rhythm of a blast furnace is seriously influenced. In order to avoid or slow down the problem of hardening of the filter layer, the filter material is backwashed by adopting the bottom filter pipe of which the flushing slag water enters the bottom of the filter tank, but the backwashing effect is not ideal because the bottom filter pipe is arranged at the bottom of the filter tank and takes water collection as the main purpose. Present end strainer is mostly long tube structure simultaneously, and water pressure can reduce the interior water pressure of end strainer after flowing in the discharge orifice on the end strainer from the water pressure for there is the blind area of back flush effect in the end strainer. Because the blind area can not be washed in all directions, the blind area is the main area where the filter material is hardened, and the filter material can be gradually enlarged or even connected into pieces if the treatment is not in time after the filter material is hardened, so that the filtering efficiency of the filtering tank is seriously influenced.
The main component of the pollutants attached to the filter material is sludge dirt which has strong adhesiveness. Although the filtering material can be cleaned in the use process of the bottom filter, the cleanliness of the filtering material is difficult to guarantee for a long time only through water flow scouring, so that the filtering material still can be hardened and failed after being used for a long time, and the normal use of the bottom filter is further influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical problem to be solved by the embodiment of the invention is to provide a water slag bottom filter layer system and a water slag bottom filter method treatment process, which can carry out reverse flushing on a modular filter layer and a drainage structure, and can efficiently remove pollutants on the modular filter layer by matching with an oscillation cleaning component in the flushing process, thereby greatly slowing down the hardening speed of the modular filter layer, prolonging the service life of the modular filter layer, reducing the operation cost, treating flushing sewage through a water storage tank, avoiding the pollutants in the flushing sewage from depositing on the modular filter layer, further prolonging the service life of the modular filter layer and recycling the flushing sewage; the granulated slag can be efficiently treated by the process of the water slag bottom filtration method, and the continuous slag production is realized.
The above object of the present invention can be achieved by the following technical solution, which provides a bottom water filter system comprising a water reservoir, at least one bottom filter and an oscillating cleaning assembly;
the bottom filter is divided into a slag catching area and a post-filtration settling area through the modular filter layer, a back washing pipe structure and a drainage structure are arranged in the post-filtration settling area, and the back washing pipe structure is positioned between the modular filter layer and the drainage structure;
a water storage filtering layer is arranged in the water storage pool, the water storage pool is divided into an overflow area and a filtered water storage area through the water storage filtering layer, the overflow area is communicated with the slag grabbing area through an overflow channel, a channel switch is arranged on the overflow channel, and the filtered water storage area is communicated with the slag grabbing area through a water return pipeline;
the oscillating cleaning assembly is arranged in the bottom filter chamber and is used for cleaning the modular filter layer.
In a preferred embodiment of the invention, the oscillating cleaning assembly comprises at least one ultrasonic oscillator.
In a preferred embodiment of the present invention, a plurality of ultrasonic oscillators are provided, and the plurality of ultrasonic oscillators are embedded in the side wall of the bottom filter and/or the bottom of the bottom filter.
In a preferred embodiment of the invention, the side wall of the bottom filter is divided into a plurality of first oscillation subareas, and at least one ultrasonic oscillator is arranged in each first oscillation subarea.
In a preferred embodiment of the invention, the ultrasonic oscillators located on the side walls are each located in close proximity to the modular filter layer.
In a preferred embodiment of the present invention, the bottom of the bottom filter is divided into a plurality of second oscillation sections, and at least one ultrasonic oscillator is disposed in each second oscillation section.
In a preferred embodiment of the present invention, the water-granulated slag bottom filter system further comprises a displacement adjusting device disposed between the bottom filter and the ultrasonic oscillator, wherein the displacement adjusting device can adjust the relative position between the ultrasonic oscillator and the inner wall of the bottom filter.
In a preferred embodiment of the present invention, two bottom filter chambers are provided, which are a first bottom filter chamber and a second bottom filter chamber, respectively, the water return pipeline is provided with a water return pump, one end of the water return pipeline is provided with two connecting pipe sections, both of the two connecting pipe sections are provided with a connection control valve, both of the two connecting pipe sections are respectively communicated with the slag grabbing area of the first bottom filter chamber and the slag grabbing area of the second bottom filter chamber, and both of the first bottom filter chamber and the second bottom filter chamber are communicated with the overflow area through the respective overflow channels.
In a preferred embodiment of the present invention, a water storage and discharge pipe is disposed on the water storage tank, the water storage and discharge pipe is communicated with the filtered water storage area, and a discharge switch is disposed on the water storage and discharge pipe.
In a preferred embodiment of the present invention, the backwash pipe structure includes a plurality of independent partition water inlet pipes, the bottom of the bottom filter is divided into a plurality of backwash partitions, and each backwash partition is provided with one independent partition water inlet pipe.
In a preferred embodiment of the present invention, the independent sub-area water inlet pipeline includes a main sub-area water inlet pipe and a sub-area water inlet branch pipe connected to each other, a water distribution branch pipe structure is disposed at two ends of the sub-area water inlet branch pipe, and a plurality of water injection holes are disposed on the water distribution branch pipe structure.
In a preferred embodiment of the present invention, the water distribution branch pipe structure includes a water distribution connecting branch pipe and two water distribution transverse branch pipes connected to two ends of the water distribution connecting branch pipe, the zoned water inlet branch pipe is connected to the water distribution connecting branch pipe, a plurality of water jet pipes are arranged on the water distribution transverse branch pipe at intervals, a plurality of water jet holes are formed in the plurality of water jet pipes, and the water jet holes are arranged facing the modular filter layer.
In a preferred embodiment of the present invention, the water jet holes are arranged at equal intervals along a length direction of the water jet pipe, and at least two water jet holes are arranged along a circumferential direction of the water jet pipe.
In a preferred embodiment of the present invention, the distance between every two adjacent water jet holes is 100mm to 400mm along the length direction of the water jet pipe.
In a preferred embodiment of the present invention, two water jet holes are formed along a circumferential direction of the water jet pipe, the two water jet holes are symmetrically arranged about a vertical center line of the water jet pipe, and an included angle between the two water jet holes and an axis of the water jet pipe is 30 ° to 180 °.
In a preferred embodiment of the present invention, the diameter of the water injection hole is 5mm to 30 mm.
In a preferred embodiment of the present invention, the drainage structure includes a plurality of independent-partition drainage pipes, the bottom of the bottom filter is divided into a plurality of drainage partitions, and each drainage partition is provided with one independent-partition drainage pipe.
In a preferred embodiment of the present invention, the independent-partition drainage pipeline includes a main partition drainage pipe and a branch partition drainage pipe connected to each other, and a branch drainage pipe structure is provided at both ends of the branch partition drainage pipe, and the branch drainage pipe structure is provided with a plurality of drainage holes.
In a preferred embodiment of the present invention, the branch drain pipe structure includes a branch drain connection pipe and two branch drain pipes connected to both ends of the branch drain connection pipe, the branch partition drain pipe is connected to the branch drain connection pipe, and a plurality of the drain holes are formed in the plurality of the branch drain pipes.
In a preferred embodiment of the present invention, the distance between two adjacent drain holes along the length direction of the drain lateral branch pipe is 100mm to 400 mm.
In a preferred embodiment of the present invention, two drainage holes are formed along a circumferential direction of the drainage lateral branch pipe, the two drainage holes are symmetrically arranged about a vertical center line of the drainage lateral branch pipe, and an included angle between the two drainage holes and an axis of the drainage lateral branch pipe is 30-180 °.
In a preferred embodiment of the present invention, the diameter of the drainage hole is 10mm to 50 mm.
In a preferred embodiment of the present invention, the drainage structure comprises a drainage pipe and a drainage pipe arranged on the bottom filter tank, and both the drainage pipe and the drainage pipe are communicated with the post-filtration sedimentation zone.
In a preferred embodiment of the present invention, a bearing frame is attached to a bottom surface of the modular filter layer, a bearing support is disposed at a lower portion of the bearing frame, and the bearing frame supports the modular filter layer through the bearing support.
In a preferred embodiment of the present invention, the load-bearing frame includes a plurality of first grid plates and a plurality of second grid plates, the plurality of first grid plates and the plurality of second grid plates are connected in a criss-cross arrangement, and a water passage hole is formed in a hollow portion between adjacent first grid plates and adjacent second grid plates.
In a preferred embodiment of the invention, a filter layer protection structure is provided on the top surface of the modular filter layer.
In a preferred embodiment of the present invention, the filter layer protection structure includes a plurality of first steel beams and a plurality of second steel beams, the plurality of first steel beams and the plurality of second steel beams are connected in a criss-cross arrangement, and a distance between each of the adjacent first steel beams and the adjacent second steel beam is smaller than a size of a grab bucket of the grab crane.
In a preferred embodiment of the present invention, the modular filter layer includes a filter box and a filter medium disposed in the filter box, the filter medium is stacked in a height direction of the filter box and has a plurality of filter layers, an upper surface of the uppermost filter layer is flush with an upper end surface of the filter box, and each filter layer contains a granular filter.
In a preferred embodiment of the present invention, the diameter of the filter body is gradually increased in a top-down direction.
In a preferred embodiment of the present invention, a flushing pipeline is disposed between the backwash pipe structure and the drainage structure, the flushing pipeline includes a drainage pipe section, a cooling pressurization pipe section and a water inlet pipe section, which are sequentially disposed, the drainage pipe section is connected to the drainage structure, and the water inlet pipe section is connected to the backwash pipe structure;
a backflow pipeline is arranged between the drainage pipeline section and the water inlet pipeline section, a backflow control valve is arranged on the backflow pipeline, a water discharge control valve is arranged on the drainage pipeline section at the downstream of the connection position of the backflow pipeline and the drainage pipeline section, and a water inlet control valve is arranged on the water inlet pipeline section at the downstream of the connection position of the backflow pipeline and the water inlet pipeline section.
In a preferred embodiment of the present invention, a hot water pump, a cooling tower and a slag flushing pump are sequentially disposed on the cooling and pressurizing pipe section along a direction from the water discharging pipe section to the water inlet pipe section.
In a preferred embodiment of the present invention, a return line is connected to the cooling and pressurizing pipe section downstream of the slag flushing pump, the other end of the return line is connected to the cooling tower, and a return control valve is disposed on the return line.
In a preferred embodiment of the present invention, the granulated slag bottom filter tank system further comprises a granulating tank, the granulating tank is provided with a granulated slag launder, an outlet of the granulated slag launder is arranged at the top of the bottom filter tank, the water inlet pipe section is connected with a conveying pipeline, the other end of the conveying pipeline is connected with the granulating tank, and the conveying pipeline is provided with a conveying control valve.
In a preferred embodiment of the present invention, a gas backflushing pipeline is disposed between the granulation tank and the backflushing pipe structure, the gas backflushing pipeline includes a gas inlet pipe section and a gas collecting pipe section, the gas inlet pipe section is provided with a gas inlet control valve, the gas collecting pipe section is provided with a gas collecting control valve, the gas collecting pipe section is connected to the granulation tank for conveying steam, and the gas inlet pipe section is connected to the backflushing pipe structure.
In a preferred embodiment of the present invention, an air line is connected to the gas backflushing line between the air intake control valve and the air collection control valve, the other end of the air line is an air inlet, and an air control valve is mounted on the air line.
In a preferred embodiment of the present invention, the backflushing partition and the drainage partition are disposed in a vertically symmetrical manner, a plurality of drainage pipe sections and a plurality of water inlet pipe sections are disposed at two ends of the cooling and pressurizing pipe section, each drainage pipe section is correspondingly connected to one independent partition drainage pipe, each water inlet pipe section is correspondingly connected to one independent partition water inlet pipe, and a backflow pipe is disposed between the water inlet pipe section corresponding to the backflushing partition and the drainage pipe section corresponding to the symmetrical drainage partition.
The invention also provides a water slag bottom filtering method treatment process, which applies the water slag bottom filtering basin system and comprises the following steps:
step 1: in the slag flushing process, high-speed slag flushing water is used for crushing, quenching and granulating blast furnace slag, the blast furnace slag is further soaked and quenched, and the quenched slag-water mixture is conveyed into the bottom filter;
step 2: in the filtering process, the slag-water mixture is filtered and separated by the bottom filter;
and step 3: a slag grabbing process, wherein slag grabbing operation is carried out on the granulated slag separated in the step 2;
and 4, step 4: and (3) a backwashing process, namely after the step (3) is finished, pressurizing and conveying a backwashing medium into the backwashing pipe structure and/or the drainage structure for backwashing, and starting the oscillating cleaning assembly in the backwashing process.
In a preferred embodiment of the present invention, the backwashing medium in step 4 is one or more of steam, air or backwashing water.
In a preferred embodiment of the present invention, the back washing medium is back washing water, the back washing water is the slag washing water filtered and separated in step 2, the slag washing water is cooled and stored after being filtered in step 2, and the slag washing water is pressurized and conveyed to the back washing pipe structure and/or the drainage structure when in use;
when the backwashing pipe structure carries out backwashing, the oscillating cleaning component is started, the channel switch is started, and the flushing sewage in the slag grabbing area flows into the overflow area through the overflow channel;
and after the reverse flushing process is finished, closing the channel switch, closing the oscillating cleaning assembly, filtering the flushing sewage in the water storage tank, and conveying the filtered flushing sewage to the bottom filter tank in the step 2 process through the water return pipeline.
In a preferred embodiment of the present invention, when there are two bottom filters, the two bottom filters are the first bottom filter and the second bottom filter respectively; wherein:
when the first bottom filter tank is operated in the step 1, the second bottom filter tank is sequentially operated in the steps 2, 3 and 4;
when the first bottom filter tank is sequentially subjected to the operations of the step 2, the step 3 and the step 4, the second bottom filter tank is subjected to the operation of the step 1;
the time for the step 1 operation is equal to the sum of the time for the step 2, the step 3 and the step 4.
In a preferred embodiment of the invention, the granular slag with the thickness of not less than 400mm is remained on the modular filter layer during the step 3 to form a slag layer.
The technical scheme of the invention has the following remarkable beneficial effects:
in the granulating slag bottom filter tank system of the invention:
1. the back flush pipe structure in the bottom filter tank can be used for back flushing the modular filter layer, and pollutants on the modular filter layer can be efficiently removed through the cooperation of the oscillation cleaning assembly in the back flush process, so that the hardening speed of the modular filter layer is greatly reduced, the service life of the modular filter layer is prolonged, and the operation cost is reduced. The sewage that washes in the end filter tank can get into through overflow passage and carry out filtration treatment in the water storage tank, and the precipitation amount of the pollutant in the washing sewage on the modularization filter layer that has significantly reduced has further improved the life of modularization filter layer, has reduced the cost of changing the modularization filter layer to wash sewage and can also flow back to in the end filter tank after the filter treatment in water storage tank, make and wash sewage and can recycle.
2. Can clean the modularization filter layer high-efficiently, fast through ultrasonic oscillator, its theory of action is: ultrasonic waves create cavitation and acoustic streaming effects in liquids. Cavitation effect can produce microjet and shock wave in the water, and then strikes repeatedly to the pollutant that adheres to on the modularization filter layer, destroys the adsorption balance of pollutant on the modularization filter layer, makes the pollutant break away from the modularization filter layer easily. The sound flow effect can generate micro sound waves and sound flow, so that the flow of the water body is accelerated, the stirring and diffusion effects of the water body are increased, and the separation process of pollutants and the modularized filter layer is accelerated.
3. Through filtering the back sedimentation zone can carry out the sedimentation treatment to the sluicing water after filtering, further reduce the tiny sediment grain of aquatic, avoid the sediment grain to get into the pipeline and then cause serious wear to pipeline, valve or the pump body.
4. The back flush pipe structure adopts an independent pipeline arrangement mode, water pressure in the pipeline is more uniform through independent subarea water inlet pipelines in the back flush subareas, the back flush pipe structure is uniformly distributed below the modularized filter layer, a back flush blind area is eliminated, hardening speed of the modularized filter layer is greatly reduced, and the service life of the modularized filter layer is prolonged.
5. The drainage structure also adopts an independent pipeline arrangement mode, filtered water is conveyed into the drainage structure by controlling the reverse flow pipeline to carry out back washing on the drainage structure so as to prevent the drainage pipeline from being blocked, and the problem of blocking of the drainage structure is solved; the back washing pipe structure and the drainage structure can be independently controlled, so that water flow in independent subareas can be independently controlled, and the back washing requirements of different areas can be met.
6. When drainage structures adopted drain pipe and sewage pipes structure, the pipe network arrangement was simplified in the drainage of utilizing the action of gravity to the blow off pipe can be with the discharge such as mud, tiny slag in the end filter pond, avoids causing jam and wearing and tearing to the pipe network, and simple structure is reliable, convenient to use.
7. The diameter of the filter body in the filter box body is gradually increased along the direction from top to bottom, the stability of the filter body is good by adopting the gradient configuration, the small-diameter filter body on the upper layer can not be taken away by filtered water, and the filtering stability of the modularized filter layer is ensured.
8. Sulfur-containing steam and/or compressed air generated by the granulating tank can be conveyed to a back flushing pipeline structure through a gas back flushing pipeline so as to carry out back flushing on the modular filter layer, if sulfur-containing steam or air is adopted for carrying out back flushing, impurities and sludge deposited in the modular filter layer can be impacted by utilizing the breaking effect of bubbles, the separation of the impurities from the modular filter layer is promoted, and the sulfur-containing steam is adopted for carrying out back flushing, so that steam whitening treatment can be realized, and the generation of white smoke due to the direct discharge of steam is avoided.
9. The slag flushing water is recycled and utilized through the bottom filter tank and the flushing pipeline, so that the slag flushing water can be recycled; the slag flushing water can be conveyed back to the granulating tank through the conveying pipeline to treat the molten slag, so that the utilization rate of the slag flushing water is improved; the return water flow in the pipeline system is adjusted through the return pipeline, and the pump body is prevented from being impacted by severe changes of the pipeline water flow.
The invention relates to a water granulated slag bottom filtration treatment process, which comprises the following steps:
1. the granulated slag can be rapidly filtered and separated by using the granulated slag bottom filter tank system, the separated slag flushing water can be recycled, the modular filter layer can be backwashed by the backwash pipe structure in the backwashing process, and pollutants on the modular filter layer can be efficiently removed by matching with the oscillation cleaning assembly in the backwashing process, so that the hardening speed of the modular filter layer is greatly reduced, the service life of the modular filter layer is prolonged, the filtering and separating effects of the granulated slag are better, and the drainage efficiency of the drainage structure can be improved;
2. the flushing sewage can be filtered through the water storage tank, the precipitation amount of pollutants in the flushing sewage on the modular filter layer is greatly reduced, the filtering effect of the modular filter layer is better, and the flushing sewage filtered by the water storage tank can flow back to the bottom filter tank, so that the cyclic use of the flushing sewage is realized;
3. by arranging the first bottom filter and the second bottom filter, the slag flushing process, the filtering and separating process, the slag grabbing process and the back washing process are alternately carried out in the first bottom filter and the second bottom filter, so that the continuous slag discharging production process is realized;
4. the existence of leaving the sediment layer can play supplementary filterable effect, has avoided simultaneously because grab the sediment process and cause the modularization filter layer too closely knit, and the water permeability that the modularization filter layer too closely knit can reduce the filter material.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.
FIG. 1 is a schematic sectional view of a granulated slag bottom filter system according to the present invention;
FIG. 2 is a schematic top view of the granulated slag bottom filter system according to the present invention;
FIG. 3 is a schematic view of an installation structure of an ultrasonic oscillator;
FIG. 4 is a schematic top view of a modular filter layer;
FIG. 5 is a schematic cross-sectional structural view of a modular filter layer;
FIG. 6 is a schematic top view of a backwash tube structure;
FIG. 7 is a schematic view of a water distribution branch pipe structure;
FIG. 8 is a schematic view showing the arrangement of the water jet holes in the axial direction;
FIG. 9 is a schematic view showing the arrangement of water jet holes in the circumferential direction;
FIG. 10 is a schematic top view of a drainage structure;
FIG. 11 is a schematic view showing the arrangement of the drain holes in the axial direction;
FIG. 12 is a schematic view showing the arrangement of the drain holes in the circumferential direction;
FIG. 13 is a schematic view of a load-bearing frame construction;
FIG. 14 is a schematic view of another drainage configuration;
fig. 15 is a schematic view of the structure of the flushing line and the gas back flushing line.
Reference numerals of the above figures:
1. a bottom filter chamber; 11. a slag grabbing area; 12. a post-filtration settling zone; 13. partitioning by backflushing; 131. a first recoil zone; 132. a second recoil zone; 14. water draining and partitioning; 141. a first drainage partition; 142. a second drainage sub-zone; 15. a first bottom filter; 16. a second bottom filter; 17. an ultrasonic oscillator; 18. a displacement adjustment device;
2. a modular filter layer; 21. a filter box body; 22. a filter medium; 23. filtering and layering; 24. a filter body; 25. a slag layer is left;
3. a back flushing pipe structure; 31. independent partition water inlet pipelines; 311. a water inlet main pipe is divided into areas; 312. a water inlet branch pipe is partitioned; 313. a first zone water inlet main pipe; 314. a second zone water inlet main pipe; 32. a water distribution branch pipe structure; 321. a water distribution connecting branch pipe; 322. a water distribution transverse branch pipe; 33. a water jet pipe; 34. a water jet hole;
4. a drainage structure; 41. an independent partition drainage pipeline; 411. a partition drainage main pipe; 412. a branch drainage pipe is divided into zones; 413. a first zone main drain pipe; 414. a second partition drainage main pipe; 42. a drain leg structure; 421. a drain connecting branch pipe; 422. a drainage lateral branch pipe; 43. a drain hole; 44. a drain pipe; 45. a blow-off pipe;
5. a load-bearing frame; 51. a first grid plate; 52. a second grid plate; 53. a water through hole; 54. a load bearing support;
6. a filter layer protection structure; 61. a first steel beam; 62. a second steel beam;
7. flushing the pipeline; 71. a drain pipe section; 711. a drain control valve; 72. cooling the pressurized pipe section; 73. a water inlet pipe section; 731. a water inlet control valve; 74. a return line; 741. a reverse flow control valve; 75. a hot water pump; 76. a cooling tower; 77. a slag flushing pump; 78. a return line; 781. a reflux control valve;
8. a granulation tank; 81. a granulated slag launder; 82. a delivery line; 821. a delivery control valve; 83. a gas back flushing pipeline; 831. an air intake pipe section; 832. a first intake pipe section; 833. a second air intake duct section; 834. an air intake control valve; 835. a gas collection pipe section; 836. a gas collection control valve; 837. an air line; 838. an air inlet; 839. an air control valve;
9. a water storage pool; 91. a water storage filter layer; 92. an overflow area; 93. a filtered water storage area; 94. an overflow channel; 95. a channel switch; 96. a water return pipeline; 961. a water return pump; 962. connecting the pipe sections; 963. connecting a control valve; 97. a water storage and sewage discharge pipe; 98. a pollution discharge switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
After the bottom filter tank is used for a long time, the hardening phenomenon of the filter layer in the bottom filter tank can occur, and the filter layer can be gradually enlarged and even connected into a sheet if the filter layer is not timely treated after being hardened, so that the filtering speed and the filtering efficiency of the filter layer are reduced, and the filtering effect of the bottom filter tank is seriously influenced. The application mainly provides a filter tank system at bottom of grain sediment, and it can carry out the backwash to modularization filter layer and drainage structures to can clear away the pollutant on the modularization filter layer high-efficiently through the clean subassembly of cooperation oscillation at the back flush in-process, greatly slowed down the speed that hardens of modularization filter layer, make the end filtering pond can keep better filter effect.
Referring to figures 1 to 15 in combination, the present application provides a bottom water filter system comprising a reservoir 9, at least one bottom filter 1 and an oscillating cleaning assembly. The bottom filter 1 is internally provided with a modularized filter layer 2, the modularized filter layer 2 is arranged at intervals with the bottom of the bottom filter 1, the bottom filter 1 is divided into a slag grabbing area 11 and a filtered settling area 12 through the modularized filter layer 2, the filtered settling area 12 is internally provided with a back washing pipe structure 3 and a drainage structure 4, and the back washing pipe structure 3 is positioned between the modularized filter layer 2 and the drainage structure 4. Be equipped with in the reservoir 9 and deposit water filter layer 91, reservoir 9 is divided into overflow district 92 and the post-filtration water district 93 of depositing through depositing water filter layer 91, and overflow district 92 is linked together through overflow channel 94 with grabbing sediment district 11, is equipped with channel switch 95 on the overflow channel 94, and post-filtration water district 93 is linked together through return water pipeline 96 with grabbing sediment district 11. The oscillating cleaning assembly is arranged in the bottom filter 1 and used for cleaning the modular filter layer 2.
On the whole, this application sediment bottom filter system adopt the mode of setting up of modularization filter layer 2, can carry out independent quick replacement to the inefficacy part that hardens appearing, avoid consumeing manpower and get into bottom filter 1 and carry out artifical clearance, shortened the maintenance duration, make the filter effect more stable. When the backwashing pipe structure 3 is used for backwashing, the oscillation cleaning assembly is started to oscillate and clean the modular filter layer 2, and the channel switch 95 is started to make the flushing sewage in the slag catching area 11 flow into the overflow area 92 through the overflow channel 94. After the reverse flushing process is completed, the oscillating cleaning component is closed, the channel switch 95 is closed, the flushing sewage is filtered in the water storage tank 9, and the filtered flushing sewage is conveyed to the bottom filter tank 1 through the water return pipeline 96 for recycling. And, the water storage filter layer 91 can also adopt the modularized arrangement, so that the cleaning and the replacement are convenient. The post-filtration settling zone 12 can further settle and purify the slag flushing water, reduce the content of fine particles and sludge in the slag flushing water, further reduce the scouring and abrasion of a pipe network and a pump body, and prolong the service life of equipment.
Wherein, the design value of the filtering speed of the bottom filter tank 1 can be>15t/(m3H), the bottom filter 1 can be arranged in a rectangular shape, the backwashing pipe structure 3 is supported in the bottom filter 1 through a support, the backwashing pipe structure 3 is arranged below the modular filter layer 2 and used for backwashing the modular filter layer 2, and the drainage structure 4 is arranged at the bottom of the bottom filter 1 through a support, so that a certain distance is reserved between the drainage structure 4 and the bottom of the bottom filter 1 for sediment particle precipitation. Of course, the user can also set the bottom filter 1 in other shapes, which is not limited here.
In the description of the present application, reference will be made to the detailed description of the embodiments and the accompanying drawings.
Specifically, referring to fig. 1 to 15, the water bottom filter system may include: a bottom filter 1; an ultrasonic oscillator 17; a modular filter layer 2; a backwash pipe structure 3; a drainage structure 4; a load-bearing frame 5; a filter layer protection structure 6; flushing the pipeline 7; a granulation tank 8; a reservoir 9.
In this embodiment, the oscillating cleaning assembly may comprise at least one ultrasonic oscillator 17. Specifically, ultrasonic oscillator 17 is provided with a plurality ofly, and is a plurality of ultrasonic oscillator 17 inlays and establishes the lateral wall of bottom filter 1 with the bottom of bottom filter 1. The embedding can be fixed embedding or movable embedding. The ultrasonic oscillator 17 adopts the mode of setting up to hide into the pool wall of end filtering pond 1, plays the guard action to ultrasonic oscillator 17, and avoids ultrasonic oscillator 17 to filter and grab the sediment process and cause the influence. Of course, the user can also adopt other installation modes according to the actual situation, and the installation mode is not limited here.
Wherein plural means that the ultrasonic oscillators 17 are provided in number of not less than two. The modular filter layers 2 in the bottom filter 1 can be cleaned by oscillation during the backwashing process by means of the ultrasonic oscillator 17, and the inner wall of the bottom filter can also be cleaned simultaneously by means of the oscillation cleaning assembly. Of course, the user can determine the position and the number of the ultrasonic oscillator 17 to be set according to actual needs, which is not limited herein.
The principle of action of the ultrasonic oscillator 17 for cleaning the modular filter layer 2 is: ultrasonic waves create cavitation and acoustic streaming effects in liquids. Cavitation effect can produce microjet and shock wave in the water, and then strikes the pollutant of adhering to on modularization filter layer 2, destroys the adsorption balance of pollutant on modularization filter layer 2, makes the pollutant break away from modularization filter layer 2 easily. The acoustic flow effect can produce micro acoustic waves and acoustic flow, so that the flow of the water body is accelerated, the stirring and diffusion effects of the water body are increased, and pollutants are quickly separated from the modular filter layer 2.
The ultrasonic oscillator 17 may be formed by assembling an ultrasonic generator and an oscillator, or may be integrally arranged or have other structures, and the user may reasonably select various types of ultrasonic oscillators 17 according to the need, which is not limited herein.
In this embodiment, the side wall of the bottom filter 1 may be divided into a plurality of first oscillation sections, and at least one ultrasonic oscillator 17 is disposed in each first oscillation section. In particular, the ultrasonic oscillators 17 located on the side walls are each arranged next to the modular filter layer 2. Wherein, abutting may refer to: the ultrasonic oscillator 17 overlaps the modular filter layer 2, or the ultrasonic oscillator 17 is disposed slightly above/below the modular filter layer 2. The cleaning effect of the ultrasonic oscillator 17 on the modular filter layer 2 can be enhanced by placing the ultrasonic oscillator 17 in close proximity to the modular filter layer 2.
Further, the bottom of the bottom filter 1 is divided into a plurality of second oscillation subareas, and at least one ultrasonic oscillator 17 is arranged in each second oscillation subarea. The ultrasonic oscillator 17 is also arranged at the bottom of the bottom filter 1, so that the side wall of the bottom filter 1 and the ultrasonic oscillator 17 on the bottom of the bottom filter can be synergistic, and a better cleaning effect is achieved.
Of course, as another alternative arrangement of the ultrasonic oscillator 17, the ultrasonic oscillator 17 may be arranged at the boundary of two oscillation sections, or the ultrasonic oscillator 17 may be arranged in the oscillation section and at the boundary of the oscillation section at the same time, and the user may adjust the number and the position of the ultrasonic oscillators 17 arranged in the oscillation section according to the actual requirement, which is not limited here.
Specifically, the first oscillation subareas can be arranged on the side wall of the bottom filter tank 1 in an equal-area mode, the second oscillation subareas can be arranged at the bottom of the bottom filter tank 1 in an equal-area mode, and the ultrasonic oscillator 17 can uniformly act on each subarea through the equal-area arrangement mode, so that the modular filter layer 2 is sufficiently cleaned. In this embodiment, the first oscillation section near the bottom of the bottom filtration chamber 1 and the second oscillation section overlapping the first oscillation section may have a common side. When the ultrasonic wave generator is used, the ultrasonic wave oscillators 17 in each oscillation subarea can be independently started, or the ultrasonic wave oscillators 17 in a plurality of oscillation subareas can be simultaneously started, or all the ultrasonic wave oscillators 17 in the bottom filter tank 1 can be started together, so that a user can adjust the starting number of the ultrasonic wave oscillators 17 according to actual needs, and the limitation is not made.
Of course, the user may also adjust the division and arrangement of the first oscillation section and the second oscillation section according to actual needs, which is not limited herein.
Specifically, two ultrasonic oscillators 17 with different powers, namely a low-frequency ultrasonic oscillator and a high-frequency ultrasonic oscillator, can be arranged in the bottom filter 1 at the same time, and the low-frequency ultrasonic oscillator and the high-frequency ultrasonic oscillator can be alternately arranged at intervals. The low-frequency ultrasonic oscillator is an ultrasonic oscillator 17 having a frequency of 20kHz-50kHz, and the high-frequency ultrasonic oscillator is an ultrasonic oscillator 17 having a frequency of 50kHz-500 kHz. The low-frequency ultrasonic oscillator can generate larger bubbles in liquid, has better cleaning effect on the modular filter layer 2, and is suitable for cleaning more and difficult-to-clean pollutants. The high-frequency ultrasonic oscillator has better penetrating performance and is suitable for cleaning complex structures. Therefore, the low-frequency ultrasonic wave oscillator and the high-frequency ultrasonic wave oscillator can be alternately started to obtain better cleaning effect in practical use. The user can adjust the setting mode and the setting number of the high-frequency ultrasonic oscillator and the low-frequency ultrasonic oscillator according to the use requirement, and the setting mode and the setting number are not limited.
In order to further increase the cleaning effect of the ultrasonic oscillator 17, in the present embodiment, the water-granulated slag bottom filter system further comprises a displacement adjusting device 18 disposed between the bottom filter 1 and the ultrasonic oscillator 17, wherein the displacement adjusting device 18 can adjust the relative position between the ultrasonic oscillator 17 and the inner wall of the bottom filter 1. The position of the ultrasonic oscillator 17 extending into the bottom filter 1 can be adjusted through the displacement adjusting device 18, and then the cleaning effect of the ultrasonic oscillator 17 on the modular filter layer 2 is enhanced.
Specifically, the displacement adjusting device 18 may adopt a hydraulic rod lifting mechanism with waterproof capability, or a worm and gear structure with waterproof capability, or a rack and pinion structure with waterproof capability. Of course, the user may use other displacement adjusting means 18 suitable for the ultrasonic oscillator 17, which is not limited herein.
In this embodiment, there may be two bottom filter chambers 1, which are a first bottom filter chamber 15 and a second bottom filter chamber 16, respectively, a water return pump 961 is provided on the water return pipeline 96, two connecting pipe sections 962 are provided at one end of the water return pipeline 96, a connection control valve 963 is provided on each of the two connecting pipe sections 962, the two connecting pipe sections 962 are respectively communicated with the slag catching area of the first bottom filter chamber 15 and the slag catching area of the second bottom filter chamber 16, and the first bottom filter chamber 15 and the second bottom filter chamber 16 are both communicated with the overflow area 92 through respective overflow channels 94. Of course, in other embodiments, for example, 3 or 4 or more bottom filters 1 may be provided according to the actual use requirement, and the present invention is not limited herein.
In this embodiment, a water storage and discharge pipe 97 is arranged on the water storage tank 9, the water storage and discharge pipe 97 is communicated with the filtered water storage area 93, and a sewage discharge switch 98 is arranged on the water storage and discharge pipe 97.
In this embodiment, the backwashing pipe structure 3 of the bottom filter 1 includes a plurality of independent partition water inlet pipes 31, the bottom of the bottom filter 1 is divided into a plurality of backwashing partitions 13, and each backwashing partition 13 is correspondingly provided with one independent partition water inlet pipe 31. Specifically, at least 2 recoil zones are provided. The backflushing subareas 13 can be divided into equal areas and arranged in the bottom filter tank 1; in addition, the back flushing pipe structure 3 adopts a mode of being close to the modular filter layer 2, so that the distance between the back flushing pipe structure and the modular filter layer 2 is shortened, and a better back flushing effect can be achieved; furthermore, the backwashing pipe structure 3 is arranged in a partitioned mode, independent backwashing operation can be conducted on the local area which is prone to hardening and blocking, independent control of the backwashing area can be achieved, and operation cost is reduced.
In this embodiment, the independent sub-area water inlet pipeline 31 includes the sub-area water inlet main pipe 311 and the sub-area water inlet branch pipe 312 which are connected, specifically, the sub-area water inlet main pipe 311 is connected to the middle of the sub-area water inlet branch pipe 312, and water flow distribution can be more uniform. The two ends of the water inlet branch pipe 312 are provided with water distribution branch pipe structures 32, and the water distribution branch pipe structures 32 are provided with a plurality of water jet holes 34.
In this embodiment, the water distribution branch pipe structure 32 may include a water distribution connecting branch pipe 321 and two water distribution transverse branch pipes 322 connected to two ends of the water distribution connecting branch pipe 321, the zoned water inlet branch pipe 312 is connected to the water distribution connecting branch pipe 321, a plurality of water injection pipes 33 are arranged on the water distribution transverse branch pipes 322 at intervals, a plurality of water injection holes 34 are formed on the plurality of water injection pipes 33, and the water injection holes 34 are arranged facing the modular filter layer 2.
Specifically, the two ends of the subarea water inlet branch pipe 312 are connected with the middle of the water distribution connecting branch pipe 321, the water distribution connecting branch pipe 321 is connected with the middle of the water distribution transverse branch pipe 322, the water distribution branch pipe structure 32 is in an I shape, the pipe distribution mode can realize uniform water flow distribution, the phenomenon that the water flow of the water flow injection holes 34 has great difference is eliminated, the water flow of each water flow injection hole 34 is more uniform, and the reverse flushing effect is improved.
In the present embodiment, the water jet holes 34 are arranged at equal intervals along the length direction of the water jet pipe 33, and at least two water jet holes 34 are arranged along the circumferential direction of the water jet pipe 33.
In the present embodiment, the distance between two adjacent water jet holes 34 in the length direction of the water jet pipe 33 is d, and d is 300 mm. Of course, the distance between the adjacent water jet holes 34 can be adjusted according to actual requirements, and is not limited herein.
In the present embodiment, referring to fig. 8, two water jet holes 34 are provided on the wall of the water jet pipe 33, the two water jet holes 34 are symmetrically arranged about the vertical center line of the water jet pipe 33, and the included angle a between the two water jet holes 34 around the axis of the water jet pipe 33 may be 90 °. This allows for a symmetrical spray angle between the two water jet holes 34, which enhances the uniformity of the flushing of the water jet holes 34. Of course, the angle between the two water jet holes 34 can be adjusted according to the actual situation to obtain better washing effect.
In the present embodiment, the water spray holes 34 may have a diameter of 20 mm. Of course, the diameter of the water injection holes 34 may be adjusted according to the washing flow rate.
In the present embodiment, the drainage structure 4 of the bottom filter 1 comprises a plurality of independent-partition drainage pipes 41, the bottom of the bottom filter 1 is divided into a plurality of drainage partitions 14, and each drainage partition 14 is correspondingly provided with one independent-partition drainage pipe 41. Specifically, at least 2 drainage partitions 14 are provided, and the user can adjust the number of the drainage partitions 14 according to actual needs, which is not limited herein. Of course, the bottom filter 1 can be provided with a sewage discharge pipe 45 at the same time, and the sewage precipitated at the bottom of the filter can be removed by the sewage discharge pipe 45.
Specifically, the drainage partition 14 and the back flushing partition 13 may be arranged vertically symmetrically, so that each independent partition drainage pipeline 41 is arranged right below the corresponding independent partition water inlet pipeline 31. The second oscillation section may be divided in the same manner as the drain section 14 and the back flush section 13, and the second oscillation section may be identical to the back flush section 13 or the drain section 14. Through the arrangement mode, a user can independently control the backwashing pipe structure 3, the drainage structure 4 and the ultrasonic oscillator 17 in each partition, and then the backwashing strength and time can be adjusted according to the states of the modularized filter layers 2 in different partitions, so that the hardening problem of the modularized filter layers 2 can be solved more accurately.
Of course, the second oscillation section may also adopt a different division manner from the drainage section 14 and the backwashing section 13, and a user may adjust the division manner of the second oscillation section according to actual needs, which is not limited herein.
In the present embodiment, the individual-section drain line 41 includes a section main drain pipe 411 and a section branch drain pipe 412 connected. Specifically, the partitioned main drain pipe 411 is connected to the middle of the partitioned branch drain pipe 412. Two ends of the divisional drainage manifold 412 are connected to one drainage manifold structure 42, respectively, and a plurality of drainage holes 43 are provided in each drainage manifold structure 42. In this embodiment, a certain distance is left between the independent subarea water inlet pipeline 31 and the bottom of the bottom filter 1 for storing the settled sewage.
In this embodiment, the branch drain structure 42 includes a branch drain connector 421 and two branch drain pipes 422 connected to both ends of the branch drain connector 421, the branch sectional drain pipes 412 are connected to the branch drain connector 421, and a plurality of drain holes 43 are formed in the plurality of branch drain pipes 422.
Specifically, both ends of the sectional drain branch pipes 412 are connected to the middle portions of the drain connecting branch pipes 421 of one drain branch pipe structure 42, respectively, and both ends of each drain connecting branch pipe 421 are connected to the middle portions of the drain lateral branch pipes 422, respectively. Thus, the function of evenly distributing water flow can be achieved, and the flushing effect is more even.
In the present embodiment, the distance between two adjacent drain holes 43 along the length direction of the drain lateral branch pipe 422 is L, L being 300 mm. Of course, the distance between adjacent drainage holes 43 can be adjusted according to actual requirements, and is not limited herein.
In this embodiment, two drainage holes 43 are disposed on the pipe wall of the drainage transverse branch pipe 422, the two drainage holes 43 are symmetrically disposed about the vertical center line of the drainage transverse branch pipe 422, and the included angle between the two drainage holes 43 and the axis of the drainage transverse branch pipe 422 is β, and β may be 90 °. This can form a symmetrical drainage angle between the two drainage holes 43, thereby enhancing the drainage uniformity of the drainage holes 43. Of course, the angle between the two drainage holes 43 can be adjusted according to the actual situation to obtain better drainage effect.
In the present embodiment, the diameter of the water discharge hole 43 may be 30 mm. Of course, the diameter of the water spray holes 34 may be adjusted according to the discharge flow rate.
In this embodiment, as another alternative embodiment of the drainage structure 4, the drainage structure 4 may comprise a drainage pipe 44 and a drainage pipe 45 which are arranged on the bottom filter 1, and the drainage pipe 44 and the drainage pipe 45 are both communicated with the post-filtration sedimentation zone 12. Specifically, the height of the drain pipe 44 above the bottom filter 1 can be made higher than the height of the drain pipe 45, so that the sediment can be prevented from flowing out of the drain pipe 44. The drain pipe 44 drains water by using the gravity action, so that the pipe network arrangement is simplified, and sludge and fine slag in the bottom filter 1 can be discharged from the drain pipe 45, so that the pipe network is prevented from being blocked and abraded.
In this embodiment, the bottom surface of the modular filter layer 2 is attached with a bearing frame 5, the lower portion of the bearing frame 5 is provided with a bearing support 54, and the bearing frame 5 supports the modular filter layer 2 through the bearing support 54. The load-bearing support 54 bears the weight of the load-bearing frame 5, the modular filter layer 2, the filter layer protective structure 6 and the granulated slag and has good strength, erosion resistance and corrosion resistance.
In the present embodiment, the load-bearing frame 5 includes a plurality of first grid plates 51 and a plurality of second grid plates 52, the plurality of first grid plates 51 and the plurality of second grid plates 52 are connected in a crisscross arrangement, and a water passage hole 53 is formed in a hollow portion between the adjacent first grid plates 51 and second grid plates 52. The limber 53 is used for making the slag flushing water pass through the bearing frame 5 smoothly after passing through the modular filter layer 2.
In the present embodiment, a filter layer protection 6 is provided on the top side of the modular filter layer 2. Specifically, the filter layer protection structure 6 may include a plurality of first steel beams 61 and a plurality of second steel beams 62, the plurality of first steel beams 61 and the plurality of second steel beams 62 are arranged in a cross manner and connected, and the distance between the adjacent first steel beams 61 and the adjacent second steel beams 62 is smaller than the size of the grab bucket of the grab crane. The first steel beam 61 and the second steel beam 62 can be parallel to the long side and the short side of the bottom filter 1 respectively.
In the present embodiment, the modular filter layer 2 includes a filter housing 21 and a filter medium 22 disposed in the filter housing 21, the filter medium 22 is stacked in a height direction of the filter housing 21 to form a plurality of filter layers 23, an upper surface of the uppermost filter layer 23 is flush with an upper end surface of the filter housing 21, and each filter layer 23 contains a granular filter 24.
In the present embodiment, the diameter of the filter body 24 gradually increases in the top-down direction. Specifically, the filter 24 in the uppermost filter layer 23 may be granulated blast furnace slag or quartz sand having the same diameter as the slag, and the upper surface of the uppermost filter 24 is flush with the upper end surface of the filter box 21. The diameter of the filter body 24 is gradually increased along the direction from top to bottom, the gradient configuration is adopted to ensure that the stability of the filter body 24 is good, the small-diameter filter body 24 on the upper layer can not be taken away by filtered water, and the filtering stability of the modular filtering layer 2 is ensured.
In this embodiment, a flushing pipeline 7 is provided between the backwash pipe structure 3 and the drainage structure 4, the flushing pipeline 7 includes a drainage pipe section 71, a cooling pressurization pipe section 72 and a water inlet pipe section 73, which are sequentially provided, the drainage pipe section 71 is connected with the drainage structure 4, and the water inlet pipe section 73 is connected with the backwash pipe structure 3.
A return pipe 74 is provided between the drain pipe section 71 and the water inlet pipe section 73, a return control valve 741 is provided on the return pipe 74, a drain control valve 711 is provided on the drain pipe section 71 downstream of the junction of the return pipe 74 and the drain pipe section 71, and a water inlet control valve 731 is provided on the water inlet pipe section 73 downstream of the junction of the return pipe 74 and the water inlet pipe section 73.
Specifically, along the direction from the drain pipe section 71 to the water inlet pipe section 73, the cooling pressurizing pipe section 72 may be provided with a hot water pump 75, a cooling tower 76 and a slag flushing pump 77 in sequence. The cooling water is stored by the cooling tower 76. In use, the drain control valve 711 is closed, the water inlet control valve 731 is closed, the reverse flow control valve 741 is opened, the cooling water in the cooling tower 76 is pressurized and conveyed to the reverse flow pipe 74 by the slag flushing pump 77, and the reverse flow pipe 74 can convey the water to the independent subarea drain pipe 41 of the drain structure 4 for reverse flushing, thereby improving the drainage effect of the drain hole 43.
In this embodiment, a return line 78 is connected to the cooling and pressurizing pipe section 72 downstream of the slag flushing pump 77, the other end of the return line 78 is connected to the cooling tower 76, and a return control valve 781 is provided on the return line 78. The return water flow is adjusted through the return pipeline 78, and a part of water flow can be reversely conveyed back to the cooling tower 76, so that the pipeline water flow is more stable, and the pump body is prevented from being impacted by the violent change of the pipeline water flow. The return water flow of the return pipeline 78 can be adjusted through the return control valve 781.
In this embodiment, the granulated slag bottom filter system further includes a granulating tank 8, the granulating tank 8 is provided with a granulated slag chute 81, an outlet of the granulated slag chute 81 is arranged at the top of the bottom filter 1, the water inlet pipe section 73 is connected with a conveying pipeline 82, the other end of the conveying pipeline 82 is connected with the granulating tank 8, and the conveying pipeline 82 is provided with a conveying control valve 821. When the slag washing machine is used, the conveying control valve 821 is opened, and the slag washing pump 77 is used for conveying the cooling water in the cooling tower 76 to the granulating pool 8 again for slag washing operation, so that the cyclic utilization of the slag washing water is realized.
In this embodiment, a gas backflushing pipeline 83 is provided between the granulation tank 8 and the backflushing pipe structure 3, the gas backflushing pipeline 83 includes a gas inlet pipe section 831 and a gas collecting pipe section 835, the gas inlet pipe section 831 is provided with a gas inlet control valve 834, the gas collecting pipe section 835 is provided with a gas collecting control valve 836, the gas collecting pipe section 835 is connected with the granulation tank 8 for conveying steam, and the gas inlet pipe section 831 is connected with the backflushing pipe structure 3.
In the present embodiment, an air line 837 is connected to the gas recoil line 83 between the intake control valve 834 and the collection control valve 836, the other end of the air line 837 is an air inlet 838, and an air control valve 839 is attached to the air line 837. The gas backflush line 83 can be supplied with backflush air via an air inlet 838. During use, the air collecting control valve 836 and/or the air control valve 839 are/is opened, sulfur-containing steam and/or compressed air is conveyed to the air inlet pipe section 831, the sulfur-containing steam and/or compressed air is conveyed to the back flushing pipe structure 3 by opening the air inlet control valve 834 on the air inlet pipe section 831, the modular filter layer 2 is back flushed by the sulfur-containing steam and/or compressed air, the back flushing is carried out by the sulfur-containing steam or air, impurities and sludge deposited in the modular filter layer 2 can be impacted by the breaking effect of bubbles, the separation of the impurities from the modular filter layer 2 is promoted, the back flushing by the sulfur-containing steam can realize steam whitening treatment, and white smoke is prevented from being generated due to direct discharge of steam.
In this embodiment, the backflushing partition 13 and the drainage partition 14 can be disposed in a vertically symmetrical manner, a plurality of drainage pipe sections 71 and a plurality of water inlet pipe sections 73 are disposed at two ends of the cooling and pressurizing pipe section 72, each drainage pipe section 71 is correspondingly connected to one independent partition drainage pipe 41, each water inlet pipe section 73 is correspondingly connected to one independent partition water inlet pipe 31, and a backflow pipe 74 is disposed between each water inlet pipe section 73 corresponding to the backflushing partition 13 and each drainage pipe section 71 corresponding to the symmetrical drainage partition 14.
Specifically, two backflushing partition sections 13 and two draining partition sections 14 are arranged in an up-down symmetrical manner, and are respectively a first backflushing partition section 131, a second backflushing partition section 132, a first draining partition section 141 and a second draining partition section 142. The first backwash partition 131 is provided with a first partition water inlet main pipe 313, the second backwash partition 132 is provided with a second partition water inlet main pipe 314, the first drainage partition 141 is provided with a first partition drainage main pipe 413, and the second drainage partition 142 is provided with a second partition drainage main pipe 414. The end of the air inlet pipe section 831 connected with the back flushing pipe structure 3 is separately provided with a first air inlet pipe section 832 and a second air inlet pipe section 833, the first air inlet pipe section 832 is connected with the first sub-area water inlet main pipe 313, the second air inlet pipe section 833 is connected with the second sub-area water inlet main pipe 314, and steam and/or air can be conveyed through the first air inlet pipe section 832 and the second air inlet pipe section 833 for back flushing.
When the water-slag bottom filter tank system is used, a slag-water mixture of blast furnace slag is conveyed to a slag grabbing area 11 of the bottom filter tank 1 for filtration and separation, the separated slag flushing water can be further precipitated in a post-filtration precipitation area 12, precipitates fall into the bottom of the tank, and the water discharge structure 4 can discharge the slag flushing water after precipitation treatment; when it is desired to back-flush the modular filter layer 2, one or more of water, steam or air is pressurized and fed into the back-flush pipe structure 3, and the modular filter layer 2 is back-flushed using the water jet holes 34.
When the backwashing pipe structure 3 uses the slag washing water for backwashing, the oscillating cleaning component is started, and the channel switch 95 is started, so that the washing sewage in the slag catching area 11 flows into the overflow area 92 through the overflow channel 94. After the reverse flushing process is completed, the oscillating cleaning component is closed, the channel switch 95 is closed, the flushing sewage is filtered in the water storage tank 9, and the filtered flushing sewage is conveyed to the bottom filter tank 1 through the water return pipeline 96 for recycling. When the drainage structure 4 is blocked, the backwashing medium can be pressurized and conveyed into the drainage structure 4 to perform backwashing on the drainage structure 4, and residual slag wool and dirt in the drainage structure 4 are removed, so that the drainage efficiency is prevented from being influenced by the blockage of the drainage hole 43.
The granulating slag bottom filter tank system has the advantages that the modular filter layer 2 and the drainage structure 4 can be reversely flushed through the backwashing pipe structure 3 in the bottom filter tank 1, pollutants on the modular filter layer 2 can be efficiently removed through matching with the oscillation cleaning assembly in the backwashing process, the hardening speed of the modular filter layer 2 is greatly slowed down, the service life of the modular filter layer 2 is prolonged, and the operation cost is reduced.
The filtered slag flushing water can be subjected to precipitation treatment through the filtered precipitation zone 12, so that fine slag particles in the water are further reduced, and the slag particles are prevented from entering a pipeline and further causing serious abrasion to a pipeline, a valve or a pump body; can carry out filtration treatment to washing sewage through the reservoir 9, the pollutant that has significantly reduced in the washing sewage is at the precipitation capacity on modularization filter layer 2 for the filter effect of modularization filter layer 2 is better, and through the reservoir 9 after filtering wash sewage can also flow back to the filtering pond 1 on the bottom, thereby realized washing the used circulation of sewage.
The backwashing pipe structures 3 adopt an independent pipeline arrangement mode, water pressure in pipelines is more uniform through independent partition water inlet pipelines 31 in the backwashing partitions 13, backwashing blind areas are eliminated due to the fact that the backwashing pipe structures 3 are uniformly distributed below the modularized filter layers 2, hardening speed of the modularized filter layers 2 is greatly reduced, and service life of the modularized filter layers 2 is prolonged. The drainage structure 4 also adopts an independent pipeline arrangement mode, and the backwashing pipe structure 3 and the drainage structure 4 can be independently controlled, so that the water flow in independent subareas can be independently controlled, and the backwashing requirements of different areas can be met. When drainage structures 4 adopt drain pipe 44 and blow off pipe 45 structure, utilize the action of gravity to drain, simplified the pipe network and arranged to blow off pipe 45 can avoid causing jam and wearing and tearing to the pipe network with mud, tiny slag etc. discharge in the end filter pond, its simple structure is reliable, convenient to use.
The diameter of the filter body 24 in the filter box body 21 is gradually increased along the direction from top to bottom, the adoption of the gradient configuration ensures that the stability of the filter body 24 is good, the small-diameter filter body 24 on the upper layer can not be taken away by filtered water, and the filtering stability of the modularized filtering layer 2 is ensured.
The bottom filter 1 and the flushing pipeline 7 are matched to realize the recovery and utilization of the flushing slag water, so that the flushing slag water can be recycled. The slag flushing water can be conveyed back to the granulating pool 8 through the conveying pipeline 82 to treat the slag, so that the utilization rate of the slag flushing water is improved. The return water flow in the pipeline system is adjusted through the return pipeline 78, and the pump body is prevented from being impacted by the severe change of the pipeline water flow.
The invention also provides a water granulated slag bottom filter method treatment process, which applies the water granulated slag bottom filter tank system in the embodiment and comprises the following steps:
step 1: in the slag flushing process, high-speed slag flushing water is utilized to smash, quench and granulate blast furnace slag in the granulation tank 8, the blast furnace slag is further soaked and quenched in the granulation tank 8, and the quenched slag-water mixture is conveyed into the bottom filter 1;
step 2: in the filtering process, the slag-water mixture is filtered and separated by a bottom filter 1;
and step 3: a slag grabbing process, wherein slag grabbing operation is carried out on the granulated slag separated in the step 2;
and 4, step 4: and (3) a backwashing process, namely after the step (3) is finished, pressurizing and conveying the backwashing medium into the backwashing pipe structure (3) and/or the drainage structure (4) for backwashing, and starting the oscillating cleaning assembly in the backwashing process.
In this embodiment, the backwashing medium in step 4 may be one or more of steam, air, or backwashing water. The steam can be sulfur-containing steam generated by the granulating tank 8, the sulfur-containing steam and compressed air are conveyed into a gas backflushing pipeline 83, the modular filter layer 2 is backflushed by the sulfur-containing steam and the compressed air, bubbles are generated by the sulfur-containing steam and the compressed air to impact impurities and sludge deposited in the modular filter layer 2, the impurities are promoted to be separated from the modular filter layer 2, then the water can be used for backflushing, and the impurities and the sludge are promoted to be rapidly separated from the modular filter layer 2 through water flow scouring.
In this embodiment, the backwashing medium is backwashing water, the backwashing water is the slag flushing water filtered and separated in the step 2, the slag flushing water is cooled and stored after being filtered in the step 2, and the slag flushing water is pressurized and conveyed to the backwashing pipe structure 3 and/or the drainage structure 4 when in use;
when the backwashing pipe structure 3 performs backwashing, the oscillating cleaning component is started, the channel switch 95 is started, and the flushing sewage in the slag catching area 11 flows into the overflow area 92 through the overflow channel 94;
after the reverse flushing process is completed, the channel switch 95 is closed, the oscillation cleaning assembly is closed, the flushing sewage is filtered in the water storage tank 9, and the filtered flushing sewage is conveyed to the bottom filter 1 in the step 2 process through the water return pipeline 96.
Wherein the flushing slag water can be stored in the water storage tank of the cooling tower 76.
In the embodiment, two bottom filter chambers 1 are arranged, the two bottom filter chambers 1 are respectively a first bottom filter chamber 15 and a second bottom filter chamber 16, and when the first bottom filter chamber 15 is operated in the step 1, the second bottom filter chamber 16 is operated in the steps 2, 3 and 4; when the first bottom filter 15 carries out the operations of the step 2, the step 3 and the step 4, the second bottom filter 16 carries out the operation of the step 1, and the time for the operation of the step 1 is equal to the sum of the time for the step 2, the step 3 and the step 4.
Specifically, the continuous deslagging production process is realized through the alternate operation in the first bottom filter 15 and the second bottom filter 16. The time of the slag flushing process of the single bottom filter 1 is not less than 2 hours, the time of the filtering process is not more than 1 hour, the time of the slag grabbing process is not more than 50 minutes, and the back washing process can be not less than 5 minutes. Of course, the user can adjust the time of the backwashing process according to the actual requirement, and the method is not limited here.
In this embodiment, the granulated slag having a thickness of not less than 400mm remains on the modular filter layer 2 during step 3 to form a slag layer 25. The existence of the slag layer 25 can play a role in auxiliary filtration, and meanwhile, the water permeability of the filter material is prevented from being reduced due to the fact that the modular filter layer 2 is too compact in the slag grabbing process.
The water granulated slag bottom filtration treatment process has the beneficial effects that:
through using filter separation in the sediment at the bottom of the grain sediment filter tank system in this embodiment can be fast to the grain sediment, the sluicing water of separating can recycle, can carry out the back flush to modular filter layer 2 and/or drainage structures 4 through the back flush process, can clear away the pollutant on modular filter layer 2 high-efficiently through the clean subassembly of cooperation oscillation in the back flush process, the speed that hardens of modular filter layer 2 has greatly been slowed down, modular filter layer 2's life has been improved, and can improve drainage structures 4 drainage efficiency, make the filter separation effect of grain sediment better.
Can carry out filtration treatment to washing sewage through the reservoir 9, the pollutant that has significantly reduced in the washing sewage is at the precipitation capacity on modularization filter layer 2 for the filter effect of modularization filter layer 2 is better, and through the reservoir 9 after filtering wash sewage can also flow back to the filtering pond 1 on the bottom, thereby realized washing the used circulation of sewage.
By arranging the first bottom filter 15 and the second bottom filter 16, the slag flushing process, the filtering process, the slag grabbing process and the back flushing process are alternately carried out in the first bottom filter 15 and the second bottom filter 16, so that the continuous slag discharging production process is realized. Can play supplementary filterable effect through staying sediment layer 25, avoided simultaneously because grab the sediment process and cause modularization filter layer 2 too closely knit, modularization filter layer 2 too closely knit can reduce the water permeability of filter material.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (28)

1. A water-granulated slag bottom filter tank system is characterized by comprising a water storage tank, at least one bottom filter tank and an oscillating cleaning assembly;
the bottom filter is divided into a slag catching area and a post-filtration settling area through the modular filter layer, a back washing pipe structure and a drainage structure are arranged in the post-filtration settling area, and the back washing pipe structure is positioned between the modular filter layer and the drainage structure;
a water storage filtering layer is arranged in the water storage pool, the water storage pool is divided into an overflow area and a filtered water storage area through the water storage filtering layer, the overflow area is communicated with the slag grabbing area through an overflow channel, a channel switch is arranged on the overflow channel, and the filtered water storage area is communicated with the slag grabbing area through a water return pipeline;
the oscillating cleaning assembly is arranged in the bottom filter chamber and is used for cleaning the modular filter layer.
2. The granulating bottom filter system of claim 1, wherein the oscillating cleaning assembly comprises a plurality of ultrasonic oscillators embedded in the side walls of the bottom filter and/or in the floor of the bottom filter.
3. The granulating bottom filter basin system as claimed in claim 2, wherein the side wall of the bottom filter basin is divided into a plurality of first oscillation subareas, and at least one ultrasonic oscillator is arranged in each first oscillation subarea;
the bottom of the bottom filter is divided into a plurality of second oscillation subareas, and at least one ultrasonic oscillator is arranged in each second oscillation subarea.
4. The system of claim 3, wherein the ultrasonic oscillators on the side walls are each positioned in close proximity to the modular filter layer.
5. A pond system according to any one of claims 2 to 4, further comprising a displacement adjustment means disposed between the bottom filter and the ultrasonic oscillator, the displacement adjustment means being capable of adjusting the relative position between the ultrasonic oscillator and the inner wall of the bottom filter.
6. The granulated slag bottom filter pond system according to any one of claims 1 to 4, wherein there are two bottom filter ponds, namely a first bottom filter pond and a second bottom filter pond, the water return pipeline is provided with a water return pump, one end of the water return pipeline is provided with two connecting pipe sections, a connecting control valve is arranged on each of the two connecting pipe sections, the two connecting pipe sections are respectively communicated with the slag grabbing area of the first bottom filter pond and the slag grabbing area of the second bottom filter pond, and the first bottom filter pond and the second bottom filter pond are both communicated with the overflow area through the respective overflow channels.
7. The granulated slag bottom filter pond system as claimed in any of claims 1 to 4, wherein a water storage and sewage discharge pipe is arranged on the reservoir, the water storage and sewage discharge pipe is communicated with the filtered water storage area, and a sewage discharge switch is arranged on the water storage and sewage discharge pipe.
8. The granulating bottom filter basin system as claimed in any of claims 1 to 4, wherein the backwash tube structure comprises a plurality of independent zoned water inlet lines, the bottom of the bottom filter basin is divided into a plurality of backwash zones, and each backwash zone is provided with one independent zoned water inlet line.
9. The granulated slag bottom filter tank system as claimed in claim 8, wherein the independent subarea water inlet pipeline comprises a main subarea water inlet pipe and a branch subarea water inlet pipe which are connected, a water distribution branch pipe structure is arranged at two ends of the branch subarea water inlet pipe, and a plurality of water flow injection holes are arranged on the water distribution branch pipe structure.
10. The granulated slag bottom filter tank system of claim 9, wherein the water distribution branch pipe structure comprises a water distribution connecting branch pipe and two water distribution transverse branch pipes connected to two ends of the water distribution connecting branch pipe, the zoned water inlet branch pipe is connected to the water distribution connecting branch pipe, a plurality of water jet pipes are arranged on the water distribution transverse branch pipe at intervals, a plurality of water jet holes are formed in the plurality of water jet pipes, and the water jet holes are arranged facing the modular filter layer;
the water flow jet holes are arranged along the length direction of the water flow jet pipe at equal intervals, and at least two water flow jet holes are arranged along the circumferential direction of the water flow jet pipe.
11. The granulating bottom filter basin system of claim 10, wherein there are two water jet holes along the circumferential direction of said water jet pipe, the two water jet holes are symmetrically arranged about the vertical center line of said water jet pipe, and the angle between the two water jet holes around the axis of said water jet pipe is 30 ° to 180 °.
12. The granulating bottom filter basin system as recited in claim 8, wherein said drainage structure comprises a plurality of independent zoned drainage lines, the bottom of said bottom filter basin being divided into a plurality of drainage zones, one of said independent zoned drainage lines being provided in each of said drainage zones.
13. The granulating bottom filter basin system as recited in claim 12, wherein the independent zoned drain line comprises a main zoned drain pipe and a branch zoned drain pipe connected to each other, and a branch drain pipe structure is provided at both ends of the branch zoned drain pipe, and a plurality of drain holes are provided in the branch drain pipe structure.
14. The granulating bottom filter basin system as claimed in claim 13, wherein the branch drain pipe structure comprises a branch drain connection pipe and two branch drain pipes connected to both ends of the branch drain connection pipe, the branch partition drain pipe is connected to the branch drain connection pipe, and a plurality of the drain holes are formed in a plurality of the branch drain pipes.
15. The granulating bottom filter basin system as recited in claim 8, wherein said drainage structure comprises a drain pipe and a drain pipe disposed on said bottom filter basin, said drain pipe and said drain pipe both being in communication with said post-filtration settling zone.
16. The granulating bottom filter basin system as claimed in any of claims 1 to 4, wherein a bearing frame is attached to the bottom surface of the modular filter layer, a bearing support is provided at the lower part of the bearing frame, and the bearing frame supports the modular filter layer through the bearing support;
the bearing frame comprises a plurality of first grating plates and a plurality of second grating plates, the first grating plates and the second grating plates are connected in a crossed arrangement mode, and water through holes are formed in hollow parts between the adjacent first grating plates and the second grating plates.
17. A granulated slag bottom filter basin system according to any of the claims 1-4, characterized in that a filter layer protection is arranged on the top surface of the modular filter layer; the filter layer protection structure comprises a plurality of first steel beams and a plurality of second steel beams, the first steel beams are connected with the second steel beams in a crossed arrangement mode, and the distance between the adjacent first steel beams and the distance between the adjacent second steel beams are smaller than the size of a grab bucket of the grab bucket crane.
18. The granulating bottom filter basin system as claimed in any of claims 1 to 4, wherein the modular filter layer comprises a filter box body and a filter medium arranged in the filter box body, the filter medium is provided with a plurality of filter layers which are stacked along the height direction of the filter box body, the upper surface of the filter layer positioned at the uppermost layer is flush with the upper end surface of the filter box body, and each filter layer contains a granular filter body;
the diameter of the filter body is gradually increased along the direction from top to bottom.
19. The granulating bottom filter basin system as recited in claim 12, wherein a flushing pipe is provided between the backwash pipe structure and the drainage structure, the flushing pipe comprises a drainage pipe section, a cooling pressurization pipe section and a water inlet pipe section which are sequentially provided, the drainage pipe section is connected with the drainage structure, and the water inlet pipe section is connected with the backwash pipe structure;
a backflow pipeline is arranged between the drainage pipeline section and the water inlet pipeline section, a backflow control valve is arranged on the backflow pipeline, a water discharge control valve is arranged on the drainage pipeline section at the downstream of the connection position of the backflow pipeline and the drainage pipeline section, and a water inlet control valve is arranged on the water inlet pipeline section at the downstream of the connection position of the backflow pipeline and the water inlet pipeline section.
20. The granulating bottom filter basin system as claimed in claim 19, wherein a hot water pump, a cooling tower and a slag flushing pump are arranged on the cooling pressurizing pipe section in sequence along the direction from the water discharge pipe section to the water inlet pipe section;
and a return pipeline is connected to the cooling pressurization pipe section at the downstream of the slag flushing pump, the other end of the return pipeline is connected with the cooling tower, and a return control valve is arranged on the return pipeline.
21. The granulated slag bottom filter tank system of claim 19, further comprising a granulating tank, wherein the granulating tank is provided with a granulated slag launder, an outlet of the granulated slag launder is arranged at the top of the bottom filter tank, the water inlet pipe section is connected with a conveying pipeline, the other end of the conveying pipeline is connected with the granulating tank, and the conveying pipeline is provided with a conveying control valve.
22. The granulating basin system as recited in claim 21, wherein a gas backflushing line is provided between the granulating basin and the backflushing pipe structure, the gas backflushing line comprises a gas inlet pipe section and a gas collecting pipe section, the gas inlet pipe section is provided with a gas inlet control valve, the gas collecting pipe section is provided with a gas collecting control valve, the gas collecting pipe section is connected with the granulating basin to convey steam, and the gas inlet pipe section is connected with the backflushing pipe structure;
an air pipeline is connected to the gas back flushing pipeline between the air inlet control valve and the air collecting control valve, the other end of the air pipeline is an air inlet, and an air control valve is installed on the air pipeline.
23. The granulating bottom filter basin system as recited in claim 19, wherein said backflushing zones and said drainage zones are arranged in an up-down symmetrical manner, a plurality of said drainage pipe sections and a plurality of said water inlet pipe sections are provided at both ends of said cooling and pressurizing pipe section, each of said drainage pipe sections is correspondingly connected to one of said independent zone drainage pipes, each of said water inlet pipe sections is correspondingly connected to one of said independent zone water inlet pipes, and a reverse flow pipe is provided between each of said water inlet pipe sections corresponding to said backflushing zones and said drainage pipe sections corresponding to said symmetrical drainage zones.
24. A process for the treatment of granulated slag by the bottom filtration method, wherein a system of the bottom filtration tank as claimed in any of claims 1 to 23 is used, comprising the steps of:
step 1: in the slag flushing process, high-speed slag flushing water is used for crushing, quenching and granulating blast furnace slag, the blast furnace slag is further soaked and quenched, and the quenched slag-water mixture is conveyed into the bottom filter;
step 2: in the filtering process, the slag-water mixture is filtered and separated by the bottom filter;
and step 3: a slag grabbing process, wherein slag grabbing operation is carried out on the granulated slag separated in the step 2;
and 4, step 4: and (3) a backwashing process, namely after the step (3) is finished, pressurizing and conveying a backwashing medium into the backwashing pipe structure and/or the drainage structure for backwashing, and starting the oscillating cleaning assembly in the backwashing process.
25. The process of claim 24, wherein the backwash medium in step 4 is one or more of steam, air or backwash water.
26. The process of claim 25, wherein the backwash medium is backwash water, the backwash water is the separated backwash water filtered in step 2, the backwash water is cooled and stored after being filtered in step 2, and the backwash water is pressurized and conveyed to the backwash pipe structure and/or the drainage structure in use;
when the backwashing pipe structure carries out backwashing, the oscillating cleaning component is started, the channel switch is started, and the flushing sewage in the slag grabbing area flows into the overflow area through the overflow channel;
and after the reverse flushing process is finished, closing the channel switch, closing the oscillating cleaning assembly, filtering the flushing sewage in the water storage tank, and conveying the filtered flushing sewage to the bottom filter tank in the step 2 process through the water return pipeline.
27. The process according to claim 26, wherein when there are two said bottom filters, the two said bottom filters are the first bottom filter and the second bottom filter, respectively; wherein:
when the first bottom filter tank is operated in the step 1, the second bottom filter tank is sequentially operated in the steps 2, 3 and 4;
when the first bottom filter tank is sequentially subjected to the operations of the step 2, the step 3 and the step 4, the second bottom filter tank is subjected to the operation of the step 1;
the time for the step 1 operation is equal to the sum of the time for the step 2, the step 3 and the step 4.
28. The granulated slag bottom filtration process of claim 24 wherein granulated slag having a thickness of not less than 400mm remains on the modular filter layer during step 3 to form a slag layer.
CN202111405075.4A 2021-11-24 2021-11-24 Water granulated slag bottom filter tank system and water granulated slag bottom filter method treatment process Pending CN114011153A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114681966A (en) * 2022-03-28 2022-07-01 深圳合续科技开发有限公司 Rain and sewage mixing overflow sewage treatment device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114681966A (en) * 2022-03-28 2022-07-01 深圳合续科技开发有限公司 Rain and sewage mixing overflow sewage treatment device

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